MKTX Insider Trading - MarketAxess Holdings Inc.

Jumlah Saham Beredar	37,363,773 shares
Saham Orang Dalam	986,136 shares
Kepemilikan oleh Orang Dalam	2.64 %
Orang Dalam Sejati	34

Skor Sentimen Orang Dalam

Skor Sentimen Orang Dalam mengidentifikasi perusahaan yang dibeli oleh orang dalam korporat.

Ini adalah hasil dari model kuantitatif multifaktor yang canggih yang mengidentifikasi perusahaan dengan tingkat akumulasi internal tertinggi. Model penilaian ini menggunakan kombinasi dari jumlah bersih orang dalam yang membeli dalam 90 hari sebelumnya, total saham yang dibeli sebagai persentase dari jumlah saham yang beredar, dan total saham yang dimiliki oleh orang dalam. Angka tersebut berkisar dari 0 hingga 100, dengan angka yang lebih tinggi menunjukkan tingkat akumulasi yang lebih tinggi dibandingkan dengan perusahaan sejenis, dan 50 adalah rata-rata.

Frekuensi Pembaruan: Setiap Hari

Lihat Pilihan Teratas dari Orang Dalam, yang menyediakan daftar perusahaan dengan akumulasi orang dalam tertinggi.

Lihat Saham dengan Peringkat Tertinggi

Skor Sentimen Petugas

Skor Sentimen Pejabat menemukan perusahaan yang dibeli oleh Pejabat Korporat.

Menurut definisi, Pejabat Korporasi adalah Orang Dalam Korporasi, tetapi tidak seperti beberapa Orang Dalam lainnya (Pemegang Saham 10% dan Anggota Dewan), Pejabat bekerja untuk perusahaan setiap hari, dan mereka menggunakan uang mereka sendiri saat bertransaksi . (Pemegang Saham 10% dan Anggota Dewan seringkali adalah manajer dana yang mengelola uang orang lain.) Dengan demikian, transaksi orang dalam yang dilakukan oleh Pejabat jauh lebih signifikan dan harus ditangani dengan tepat.

Seperti Skor Sentimen Internal, Skor Sentimen Pejabat adalah hasil dari model kuantitatif multi-faktor yang canggih yang mengidentifikasi perusahaan dengan tingkat akumulasi pejabat tertinggi.

Frekuensi Pembaruan: Setiap Hari

Lihat Pilihan Teratas dari Orang Dalam, yang menyediakan daftar perusahaan dengan sentimen orang dalam tertinggi.

Lihat Saham dengan Peringkat Tertinggi

Metrik Utama Orang Dalam

Kartu ini menunjukkan peringkat perusahaan berdasarkan berbagai metrik internal. Peringkat persentil menunjukkan bagaimana perusahaan ini dibandingkan dengan perusahaan lain di pasar AS. Peringkat yang lebih tinggi menunjukkan situasi yang lebih baik.

Sebagai contoh, secara umum diterima bahwa pembelian oleh orang dalam perusahaan adalah indikator positif, sehingga perusahaan dengan lebih banyak pembelian oleh orang dalam akan mendapat peringkat lebih tinggi daripada perusahaan dengan lebih sedikit pembelian oleh orang dalam (atau bahkan penjualan oleh orang dalam).

Jumlah Bersih Pembelian oleh Orang Dalam (Peringkat)

-1 ( )

9760 out of 11305

Jumlah Bersih Pembelian oleh Orang Dalam adalah total jumlah orang dalam yang membeli dikurangi total jumlah orang dalam yang menjual dalam 90 hari terakhir. Peringkat persentil ditunjukkan di sini (kisaran dari 0 hingga 100%).

Persentase Saham yang Dibeli oleh Orang Dalam (Peringkat)

-0.006 %( )

9841 out of 11224

Persentase Saham yang Dibeli oleh Orang Dalam adalah total jumlah saham yang dibeli oleh orang dalam dikurangi total jumlah saham yang dijual oleh orang dalam dalam 90 hari terakhir, dibagi dengan total jumlah saham yang beredar dan dikalikan dengan 100.

Grafik Perdagangan Orang Dalam

Grafik berikut menunjukkan MarketAxess Holdings Inc. transaksi orang dalam. Orang dalam adalah pejabat, direktur, atau investor signifikan dalam suatu perusahaan. Secara umum, melakukan transaksi di perusahaan mereka berdasarkan informasi material yang belum dipublikasikan adalah ilegal bagi orang dalam. Ini tidak berarti bahwa mereka dilarang melakukan transaksi apa pun di perusahaan mereka sendiri. Namun, mereka wajib melaporkan semua transaksi kepada SEC melalui Formulir 4.

Daftar Orang Dalam dan Metrik Profitabilitas

Tabel ini menampilkan daftar orang dalam yang diketahui, dan dibuat secara otomatis dari pengajuan yang diungkapkan kepada SEC. Selain nama, jabatan terbaru, dan sebutan direktur, pejabat, atau pemilik 10%, kami memberikan kepemilikan terbaru yang diungkapkan. Selain itu, jika memungkinkan, kami memberikan kinerja perdagangan historis untuk orang dalam tersebut. Kinerja perdagangan historis adalah rata-rata tertimbang dari kinerja transaksi pembelian pasar terbuka aktual yang dilakukan oleh orang dalam tersebut. Untuk informasi lebih lanjut tentang bagaimana ini dihitung, tonton webinar YouTube ini.

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Orang Dalam	Saham Dimiliki	Terbagi Disesuaikan
Altobello Nancy A. Director - [D]	3,762	3,762
Steven L Begleiter Director - [D]	10,684	10,684
Sharon Brown-Hruska Director - [D]	10,346	10,346
Roger Burkhardt Director - [D]	13,161	13,161
Christopher R Concannon Chief Executive Officer, Director - [D] [O]	48,281	48,281
Stephen P Casper Director - [D]	9,985	9,985
Jane Chwick Director - [D]	8,439	8,439
Cianciulli Michael R. Head of Ext Rep & Comp Accting - [O]	1,155	1,155
Cruger William Frank Jr. Director - [D]	8,807	8,807
Antonio L Delise Global Head of Corp. Dev. - [O]	26,993	26,993
Bieler Ilene Fiszel Chief Financial Officer - [O]	4,422	4,422

Orang Dalam	Saham Dimiliki	Terbagi Disesuaikan
David G Gomach Director - [D]	19,059	19,059
Gerosa Christopher N. Chief Financial Officer - [O]	1,752	1,752
Kourtney Gibson Director - [D]	3,152	3,152
Justin Gerald Gmelich Director - [D]	1,243	1,243
Carlos Mauricio Hernandez Director - [D]	3,024	3,024
Ronald M Hersch Director - [D]	34,981	34,981
Roberto Hoornweg Director - [D]	999	999
Richard G Ketchum Director - [D]	4,703	4,703
Xiaojia Charles Li Director - [D]	768	768
Jerome S Markowitz Director - [D]	6,807	6,807
Kevin M McPherson Chief Revenue Officer - [O]	69,175	69,175

Orang Dalam	Saham Dimiliki	Terbagi Disesuaikan
Richard M McVey Executive Chairman, Director - [D] [O]	564,029	564,029
Nitin A Mirwani Chief Accounting Officer - [O]	0	0
Naineshkumar Shantilal Panchal Chief Information Officer - [O]	10,343	10,343
Scott Pintoff General Counsel and Secretary - [O]	9,838	9,838
Emily Hope Portney Director - [D]	3,656	3,656
Richard Leon Prager Director - [D]	3,904	3,904
Christophe Pierre Daniel Roupie Head of EMEA and APAC - [O]	8,208	8,208
James N B Rucker CFO - [O]	53,334	53,334
John Steinhardt Director - [D]	21,313	21,313
James Joseph Sullivan Director - [D]	8,038	8,038
Nicholas Themelis Chief Information Officer - [O]	8,544	8,544
Lesley Daniels Webster Director - [D]	3,231	3,231

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Rekam Jejak Pembelian Orang Dalam - Analisis Keuntungan Jangka Pendek

Pada bagian ini, kami menganalisis profitabilitas setiap pembelian saham oleh orang dalam di pasar terbuka yang tidak direncanakan yang dilakukan di MKTX / MarketAxess Holdings Inc.. Analisis ini membantu memahami apakah orang dalam tersebut secara konsisten menghasilkan pengembalian abnormal, dan layak untuk diikuti. Analisis ini dilakukan selama satu tahun setelah setiap transaksi, dan hasilnya bersifat teoretis .

Tabel berikut menunjukkan pembelian pasar terbuka terbaru yang bukan bagian dari rencana perdagangan otomatis.

Tanggal Perdagangan	Orang Dalam	Dilaporkan Saham	Dilaporkan Harga	Disesuaikan Saham	Disesuaikan Harga	Dasar Biaya	Hari-hari menuju Maksimal	Harga di Maksimal	Maksimal Keuntungan ($)	Maksimum Pengembalian (%)
2023-08-14	CONCANNON CHRISTOPHER R	104	235.1000	104	235.1000	24,450	136	296.4200	6,378	26.08
2023-08-14	CONCANNON CHRISTOPHER R	404	236.4900	404	236.4900	95,542
2023-08-14	CONCANNON CHRISTOPHER R	2,203	238.0500	2,203	238.0500	524,424
2023-08-14	CONCANNON CHRISTOPHER R	900	239.2600	900	239.2600	215,334
2023-08-14	CONCANNON CHRISTOPHER R	600	240.1600	600	240.1600	144,096
2023-08-14	CONCANNON CHRISTOPHER R	59	240.9000	59	240.9000	14,213
2022-04-22	Prager Richard Leon	500	269.9900	500	269.9900	134,995
2022-04-22	Prager Richard Leon	500	272.5000	500	272.5000	136,250
2019-08-15	Prager Richard Leon	1,000	358.4900	1,000	358.4900	358,490

Harga yang Disesuaikan adalah harga yang disesuaikan dengan pemisahan saham. Ang Adjusted Shares ay ang jumlah saham yang disesuaikan dengan pemisahan saham (stock split).

MKTX / MarketAxess Holdings Inc. Insider Trades

Rekam Jejak Penjualan Orang Dalam - Analisis Kerugian Jangka Pendek

Dalam bagian ini, kami menganalisis penghindaran kerugian jangka pendek dari setiap penjualan dalam pasar terbuka yang tidak direncanakan oleh orang dalam yang dilakukan di MKTX / MarketAxess Holdings Inc.. Pola penghindaran kerugian yang konsisten dapat menunjukkan bahwa transaksi penjualan di masa mendatang dapat memprediksi penurunan harga. Analisis ini berlaku untuk satu tahun setelah setiap perdagangan, dan hasilnya bersifat teoretis .

Tabel berikut menunjukkan penjualan pasar terbuka terbaru yang bukan bagian dari rencana perdagangan otomatis.

Tanggal Perdagangan	Orang Dalam	Dilaporkan Saham	Dilaporkan Harga	Disesuaikan Saham	Disesuaikan Harga	Dasar Biaya	Hari-hari menuju Menit	Harga di Menit	Kerugian Maksimal Dihindari ($)	Kerugian Maksimal Dihindari (%)
2025-06-11	McPherson Kevin M	2,000	224.7700	2,000	224.7700	449,540	85	180.1300	-89,280	-19.86
2025-05-14	Roupie Christophe Pierre Daniel	1,189	210.4400	1,189	210.4400	250,213
2024-12-09	Pintoff Scott	300	240.5700	300	240.5700	72,171
2024-11-14	McVey Richard M	3,290	268.1300	3,290	268.1300	882,148
2024-11-14	McVey Richard M	6,710	267.4500	6,710	267.4500	1,794,590
2024-11-13	McVey Richard M	949	271.0000	949	271.0000	257,179
2024-11-13	McVey Richard M	1,474	269.4200	1,474	269.4200	397,125
2024-11-13	McVey Richard M	1,937	268.6300	1,937	268.6300	520,336
2024-11-13	McVey Richard M	8,159	267.4000	8,159	267.4000	2,181,717

Harga yang Disesuaikan adalah harga yang disesuaikan dengan pemisahan saham. Ang Adjusted Shares ay ang jumlah saham yang disesuaikan dengan pemisahan saham (stock split).

Riwayat Transaksi

Klik ikon tautan untuk melihat riwayat transaksi lengkap. Transaksi yang dilaporkan sebagai bagian dari rencana perdagangan otomatis 10b5-1 akan memiliki tanda X di kolom yang bertanda 10b-5.

Berkas Tanggal	Perdagangan Tanggal	Formulir	Orang Dalam	Ticker	Judul Keamanan	Kode	Langsung	Latihan Harga	Satuan Harga	Unit Diubah	Nilai Diubah (1 ribu)	Sisa Pilihan	Sisa Saham
2025-08-15	2025-08-13	4	Portney Emily Hope By GRAT	MKTX	Common Stock, par value $0.003 per share	G - Gift	I			3,656			3,656
2025-08-15	2025-08-13	4	Portney Emily Hope	MKTX	Common Stock, par value $0.003 per share	G - Gift	D			-3,656			784
2025-07-01		3	Mirwani Nitin A	MKTX	Common Stock, par value $0.003 per share		D						0
2025-06-11	2025-06-11	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		224.7700	-2,000	-450		69,175
2025-06-05	2025-06-04	4	Casper Stephen P	MKTX	Common Stock, par value $0.003 per share	A - Award	D			784			9,985
2025-06-05	2025-06-04	4	Portney Emily Hope	MKTX	Common Stock, par value $0.003 per share	A - Award	D			784			4,440
2025-06-05	2025-06-04	4	Altobello Nancy A.	MKTX	Common Stock, par value $0.003 per share	A - Award	D			784			3,762
2025-06-05	2025-06-04	4	HERNANDEZ CARLOS MAURICIO	MKTX	Common Stock, par value $0.003 per share	A - Award	D			1,475			3,024
2025-06-05	2025-06-04	4	Cruger William Frank Jr.	MKTX	Common Stock, par value $0.003 per share	A - Award	D			784			8,807
2025-06-05	2025-06-04	4	Gibson Kourtney	MKTX	Common Stock, par value $0.003 per share	A - Award	D			784			3,152
2025-06-05	2025-06-04	4	Hoornweg Roberto	MKTX	Common Stock, par value $0.003 per share	A - Award	D			784			999
2025-06-05	2025-06-04	4	Chwick Jane	MKTX	Common Stock, par value $0.003 per share	A - Award	D			784			8,439
2025-06-05	2025-06-04	4	KETCHUM RICHARD G	MKTX	Common Stock, par value $0.003 per share	A - Award	D			784			4,703
2025-06-05	2025-06-04	4	Begleiter Steven L	MKTX	Common Stock, par value $0.003 per share	A - Award	D			784			10,684
2025-06-03	2025-04-01	4	Cianciulli Michael R.	MKTX	Common Stock, par value $0.003 per share	A - Award	D			232			1,155
2025-06-03	2025-06-03	4	Fiszel Bieler Ilene	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		219.0200	-242	-53		4,422
2025-05-20	2025-05-15	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	G - Gift	D			-250			71,175
2025-05-15	2025-05-14	4	Roupie Christophe Pierre Daniel	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		210.4400	-1,189	-250		8,208
2025-03-21	2025-03-20	4	HERNANDEZ CARLOS MAURICIO By GRAT 2	MKTX	Common Stock, par value $0.003 per share	G - Gift	I			12,480			12,480
2025-03-21	2025-03-20	4	HERNANDEZ CARLOS MAURICIO	MKTX	Common Stock, par value $0.003 per share	G - Gift	D			-12,480			1,549
2025-03-10	2025-03-03	4	HERNANDEZ CARLOS MAURICIO	MKTX	Common Stock, par value $0.003 per share	G - Gift	D			12,480			14,029
2025-03-10	2025-03-03	4	HERNANDEZ CARLOS MAURICIO By GRAT	MKTX	Common Stock, par value $0.003 per share	G - Gift	I			-12,480			7,466
2025-03-03	2025-03-01	4	Panchal Naineshkumar Shantilal	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		192.7900	-583	-112		10,343
2025-03-03	2025-03-01	4	Panchal Naineshkumar Shantilal	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		192.7900	-991	-191		10,926
2025-03-03	2025-03-01	4	Hoornweg Roberto	MKTX	Common Stock, par value $0.003 per share	A - Award	D			215			215
2025-03-03		3	Hoornweg Roberto	MKTX	Common Stock, par value $0.003 per share		D						0
2025-02-18	2025-02-15	4	Panchal Naineshkumar Shantilal	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		193.4900	-624	-121		11,917
2025-02-18	2025-02-15	4	Panchal Naineshkumar Shantilal	MKTX	Common Stock, par value $0.003 per share	A - Award	D			2,468			12,541
2025-02-18	2025-02-14	4	Panchal Naineshkumar Shantilal	MKTX	Common Stock, par value $0.003 per share	A - Award	D			1,791			10,073
2025-02-18	2025-02-15	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		193.4900	-1,003	-194		71,425
2025-02-18	2025-02-15	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	A - Award	D			3,740			72,428
2025-02-18	2025-02-15	4	Cianciulli Michael R.	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		193.4900	-83	-16		923
2025-02-18	2025-02-15	4	Cianciulli Michael R.	MKTX	Common Stock, par value $0.003 per share	A - Award	D			324			1,006
2025-02-18	2025-02-15	4	CONCANNON CHRISTOPHER R	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		193.4900	-693	-134		48,281
2025-02-18	2025-02-15	4	CONCANNON CHRISTOPHER R	MKTX	Common Stock, par value $0.003 per share	A - Award	D			6,202			48,974
2025-02-18	2025-02-15	4	Fiszel Bieler Ilene	MKTX	Common Stock, par value $0.003 per share	A - Award	D			2,867			4,664
2025-02-18	2025-02-15	4	Roupie Christophe Pierre Daniel	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		193.4900	-602	-116		9,397
2025-02-18	2025-02-15	4	Roupie Christophe Pierre Daniel	MKTX	Common Stock, par value $0.003 per share	A - Award	D			2,488			9,999
2025-02-18	2025-02-15	4	Pintoff Scott	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		193.4900	-691	-134		9,838
2025-02-18	2025-02-15	4	Pintoff Scott	MKTX	Common Stock, par value $0.003 per share	A - Award	D			2,244			10,529
2025-01-31	2025-01-31	4	CONCANNON CHRISTOPHER R	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		217.7700	-243	-53		42,772
2025-01-31	2025-01-31	4	CONCANNON CHRISTOPHER R	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		217.7700	-585	-127		43,015
2025-01-31	2025-01-29	4	CONCANNON CHRISTOPHER R	MKTX	Common Stock, par value $0.003 per share	A - Award	D			1,622			43,600
2025-01-31	2025-01-31	4	Roupie Christophe Pierre Daniel	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		217.7700	-194	-42		7,511
2025-01-31	2025-01-31	4	Roupie Christophe Pierre Daniel	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		217.7700	-263	-57		7,705
2025-01-31	2025-01-29	4	Roupie Christophe Pierre Daniel	MKTX	Common Stock, par value $0.003 per share	A - Award	D			559			7,968
2025-01-31	2025-01-31	4	Pintoff Scott	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		217.7700	-195	-42		8,285
2025-01-31	2025-01-31	4	Pintoff Scott	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		217.7700	-258	-56		8,480
2025-01-31	2025-01-29	4	Pintoff Scott	MKTX	Common Stock, par value $0.003 per share	A - Award	D			436			8,738
2025-01-31	2025-01-31	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		217.7700	-261	-57		68,688
2025-01-31	2025-01-31	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		217.7700	-310	-68		68,949
2025-01-31	2025-01-29	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	A - Award	D			859			69,259
2025-01-31	2025-01-31	4	Cianciulli Michael R.	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		217.7700	-8	-2		682
2025-01-02	2025-01-01	4	HERNANDEZ CARLOS MAURICIO	MKTX	Common Stock, par value $0.003 per share	A - Award	D			275			1,549
2024-12-09	2024-12-09	4	Pintoff Scott	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		240.5700	-300	-72		8,302
2024-12-03	2024-12-02	4	Chwick Jane	MKTX	Common Stock, par value $0.003 per share	G - Gift	D			-381			7,655
2024-11-14	2024-11-14	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		268.1300	-3,290	-882		562,029
2024-11-14	2024-11-14	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		267.4500	-6,710	-1,795		565,319
2024-11-14	2024-11-13	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		273.5400	-150	-41		572,029
2024-11-14	2024-11-13	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		272.6400	-2,188	-597		572,179
2024-11-14	2024-11-13	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		271.7400	-5,143	-1,398		574,367
2024-11-14	2024-11-13	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		271.0000	-949	-257		579,510
2024-11-14	2024-11-13	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		269.4200	-1,474	-397		580,459
2024-11-14	2024-11-13	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		268.6300	-1,937	-520		581,933
2024-11-14	2024-11-13	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		267.4000	-8,159	-2,182		583,870
2024-11-14	2024-11-12	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		273.7800	-928	-254		592,029
2024-11-14	2024-11-12	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		272.9300	-3,233	-882		592,957
2024-11-14	2024-11-12	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		271.8400	-7,266	-1,975		596,190
2024-11-14	2024-11-12	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		271.0100	-8,573	-2,323		603,456
2024-09-09	2024-09-06	4	Casper Stephen P	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		259.3900	-1,000	-259		9,201
2024-08-16	2024-08-14	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		241.1300	-1,692	-408		68,400
2024-08-14	2024-08-13	4	Pintoff Scott	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		240.0100	-900	-216		8,602
2024-08-09	2024-08-08	4	Roupie Christophe Pierre Daniel	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		231.6300	-617	-143		7,409
2024-06-11	2024-06-07	4	Casper Stephen P	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		199.4800	-500	-100		10,201
2024-06-07	2024-06-05	4	KETCHUM RICHARD G	MKTX	Common Stock, par value $0.003 per share	A - Award	D			781			3,919
2024-06-07	2024-06-05	4	HERNANDEZ CARLOS MAURICIO	MKTX	Common Stock, par value $0.003 per share	A - Award	D			781			1,274
2024-06-07	2024-06-05	4	Cruger William Frank Jr.	MKTX	Common Stock, par value $0.003 per share	A - Award	D			781			8,023
2024-06-07	2024-06-05	4	Chwick Jane	MKTX	Common Stock, par value $0.003 per share	A - Award	D			781			8,036
2024-06-07	2024-06-05	4	Altobello Nancy A.	MKTX	Common Stock, par value $0.003 per share	A - Award	D			903			2,978
2024-06-07	2024-06-05	4	Casper Stephen P	MKTX	Common Stock, par value $0.003 per share	A - Award	D			781			10,701
2024-06-07	2024-06-05	4	Portney Emily Hope	MKTX	Common Stock, par value $0.003 per share	A - Award	D			781			3,656
2024-06-07	2024-06-05	4	Gibson Kourtney	MKTX	Common Stock, par value $0.003 per share	A - Award	D			781			2,368
2024-06-07	2024-06-05	4	Begleiter Steven L	MKTX	Common Stock, par value $0.003 per share	A - Award	D			781			9,900
2024-06-04	2024-06-03	4	Fiszel Bieler Ilene	MKTX	Common Stock, par value $0.003 per share	A - Award	D			1,797			1,797
2024-05-24		3	Fiszel Bieler Ilene	MKTX	Common Stock, par value $0.003 per share		D						0
2024-05-24	2024-05-22	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	G - Gift	D			-9,300			612,029
2024-03-01	2024-03-01	4	Panchal Naineshkumar Shantilal	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		213.4100	-491	-105		8,282
2024-02-16	2024-02-15	4	Cianciulli Michael R.	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		216.2100	-13	-3		657
2024-02-16	2024-02-15	4	Cianciulli Michael R.	MKTX	Common Stock, par value $0.003 per share	A - Award	D			225			670
2024-02-16	2024-02-15	4	Cianciulli Michael R.	MKTX	Common Stock, par value $0.003 per share	A - Award	D			281			445
2024-02-16	2024-02-15	4	Panchal Naineshkumar Shantilal	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		216.2100	-125	-27		8,773
2024-02-16	2024-02-15	4	Panchal Naineshkumar Shantilal	MKTX	Common Stock, par value $0.003 per share	A - Award	D			2,698			8,898
2024-02-16	2024-02-16	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		221.2600	-2,000	-443		70,092
2024-02-16	2024-02-15	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		216.2100	-378	-82		72,092
2024-02-16	2024-02-15	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	A - Award	D			3,653			72,470
2024-02-16	2024-02-15	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	A - Award	D			2,611			621,329
2024-02-16	2024-02-15	4	Pintoff Scott	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		216.2100	-224	-48		9,502
2024-02-16	2024-02-15	4	Pintoff Scott	MKTX	Common Stock, par value $0.003 per share	A - Award	D			899			9,726
2024-02-16	2024-02-15	4	Pintoff Scott	MKTX	Common Stock, par value $0.003 per share	A - Award	D			1,855			8,827
2024-02-16	2024-02-15	4	CONCANNON CHRISTOPHER R	MKTX	Common Stock, par value $0.003 per share	A - Award	D			3,991			41,978
2024-02-16	2024-02-15	4	Roupie Christophe Pierre Daniel	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		216.2100	-204	-44		8,026
2024-02-16	2024-02-15	4	Roupie Christophe Pierre Daniel	MKTX	Common Stock, par value $0.003 per share	A - Award	D			2,519			8,230
2024-02-07		3	Cianciulli Michael R.	MKTX	Common Stock, par value $0.003 per share		D						132
2024-02-02	2024-01-31	4	Gerosa Christopher N.	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		274.3300	-22	-6		1,752
2024-02-02	2024-01-31	4	Gerosa Christopher N.	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		274.3300	-79	-22		1,774
2024-02-02	2024-01-31	4	Pintoff Scott	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		274.3300	-160	-44		6,972
2024-02-02	2024-01-31	4	Pintoff Scott	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		274.3300	-177	-49		7,132
2024-02-02	2024-01-31	4	Pintoff Scott	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		274.3300	-135	-37		7,309
2024-02-02	2024-01-31	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		274.3300	-182	-50		68,817
2024-02-02	2024-01-31	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		274.3300	-310	-85		68,999
2024-02-02	2024-01-31	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		274.3300	-154	-42		69,309
2024-02-02	2024-01-31	4	Roupie Christophe Pierre Daniel	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		274.3300	-83	-23		5,711
2024-02-02	2024-01-31	4	Roupie Christophe Pierre Daniel	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		274.3300	-193	-53		5,794
2024-02-02	2024-01-31	4	Roupie Christophe Pierre Daniel	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		274.3300	-70	-19		5,987
2024-02-02	2024-01-31	4	CONCANNON CHRISTOPHER R	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		274.3300	-459	-126		37,987
2024-02-02	2024-01-31	4	CONCANNON CHRISTOPHER R	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		274.3300	-305	-84		38,446
2024-02-02	2024-01-31	4	CONCANNON CHRISTOPHER R	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		274.3300	-195	-53		38,751
2024-02-02	2024-01-31	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		274.3300	-652	-179		618,718
2024-02-02	2024-01-31	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		274.3300	-711	-195		619,370
2024-02-02	2024-01-31	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		274.3300	-1,452	-398		620,081
2024-02-02	2024-01-31	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		274.3300	-277	-76		621,533
2024-01-23	2024-01-22	4	CONCANNON CHRISTOPHER R	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		265.9300	-4,042	-1,075		38,946
2024-01-23	2024-01-22	4	CONCANNON CHRISTOPHER R	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		265.9300	-5,077	-1,350		42,988
2024-01-17	2024-01-16	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	A - Award	D			1,277			621,810
2024-01-17	2024-01-15	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		268.9800	-10,923	-2,938		620,533
2024-01-17	2024-01-15	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		268.9800	-14,558	-3,916		631,456
2024-01-17	2024-01-16	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	A - Award	D			504			69,463
2024-01-17	2024-01-16	4	Roupie Christophe Pierre Daniel	MKTX	Common Stock, par value $0.003 per share	A - Award	D			175			6,057
2024-01-17	2024-01-16	4	Pintoff Scott	MKTX	Common Stock, par value $0.003 per share	A - Award	D			288			7,444
2024-01-17	2024-01-16	4	CONCANNON CHRISTOPHER R	MKTX	Common Stock, par value $0.003 per share	A - Award	D			899			48,065
2024-01-12	2024-01-10	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		272.3800	-6,368	-1,735		646,014
2024-01-12	2024-01-10	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		203.7200	16,037	3,267		652,382
2023-12-11	2023-12-08	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		260.5000	-920	-240		68,959
2023-11-28	2023-11-27	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		230.9500	-1,020	-236		69,879
2023-11-21	2023-11-20	4	HERNANDEZ CARLOS MAURICIO By GRAT	MKTX	Common Stock, par value $0.003 per share	G - Gift	I			19,946			19,946
2023-11-21	2023-11-20	4	HERNANDEZ CARLOS MAURICIO	MKTX	Common Stock, par value $0.003 per share	G - Gift	D			-19,946			493
2023-11-09	2023-11-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		223.0100	-10,108	-2,254		636,345
2023-11-09	2023-11-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		223.0100	-9,160	-2,043		646,453
2023-10-25	2023-10-23	4	HERNANDEZ CARLOS MAURICIO	MKTX	Common Stock, par value $0.003 per share	A - Award	D			493			20,439
2023-09-14		3	HERNANDEZ CARLOS MAURICIO	MKTX	Common Stock, par value $0.003 per share		D						19,946
2023-08-29	2023-08-28	4	Casper Stephen P	MKTX	Common Stock, par value $0.003 per share	G - Gift	D			-200			9,920
2023-08-15	2023-08-14	4	CONCANNON CHRISTOPHER R	MKTX	Common Stock, par value $0.003 per share	P - Purchase	D		240.9000	59	14		47,166
2023-08-15	2023-08-14	4	CONCANNON CHRISTOPHER R	MKTX	Common Stock, par value $0.003 per share	P - Purchase	D		240.1600	600	144		47,107
2023-08-15	2023-08-14	4	CONCANNON CHRISTOPHER R	MKTX	Common Stock, par value $0.003 per share	P - Purchase	D		239.2600	900	215		46,507
2023-08-15	2023-08-14	4	CONCANNON CHRISTOPHER R	MKTX	Common Stock, par value $0.003 per share	P - Purchase	D		238.0500	2,203	524		45,607
2023-08-15	2023-08-14	4	CONCANNON CHRISTOPHER R	MKTX	Common Stock, par value $0.003 per share	P - Purchase	D		236.4900	404	96		43,404
2023-08-15	2023-08-14	4	CONCANNON CHRISTOPHER R	MKTX	Common Stock, par value $0.003 per share	P - Purchase	D		235.1000	104	24		43,000
2023-08-07	2023-08-01	4	Gerosa Christopher N.	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		262.6000	-91	-24		1,853
2023-06-15	2023-06-15	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		277.2500	-1,000	-277		70,899
2023-06-15	2023-06-14	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		274.0000	-2,000	-548		71,899
2023-06-09	2023-06-07	4	Casper Stephen P	MKTX	Common Stock, par value $0.003 per share	A - Award	D			581			10,120
2023-06-09	2023-06-07	4	Portney Emily Hope	MKTX	Common Stock, par value $0.003 per share	A - Award	D			581			2,875
2023-06-09	2023-06-07	4	Altobello Nancy A.	MKTX	Common Stock, par value $0.003 per share	A - Award	D			672			2,075
2023-06-09	2023-06-07	4	Begleiter Steven L	MKTX	Common Stock, par value $0.003 per share	A - Award	D			581			9,119
2023-06-09	2023-06-07	4	KETCHUM RICHARD G	MKTX	Common Stock, par value $0.003 per share	A - Award	D			581			3,138
2023-06-09	2023-06-07	4	Cruger William Frank Jr.	MKTX	Common Stock, par value $0.003 per share	A - Award	D			581			7,242
2023-06-09	2023-06-07	4	Gibson Kourtney	MKTX	Common Stock, par value $0.003 per share	A - Award	D			581			1,587
2023-06-09	2023-06-07	4	Chwick Jane	MKTX	Common Stock, par value $0.003 per share	A - Award	D			581			7,255
2023-06-09	2023-06-07	4	Prager Richard Leon	MKTX	Common Stock, par value $0.003 per share	A - Award	D			581			3,904
2023-04-05	2023-04-03	4	CONCANNON CHRISTOPHER R	MKTX	Common Stock, par value $0.003 per share	A - Award	D			2,729			42,896
2023-03-10	2023-03-08	4	Pintoff Scott	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		360.2300	-101	-36		7,156
2023-03-10	2023-03-08	4	Pintoff Scott	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		357.8300	-149	-53		7,257
2023-03-07	2023-03-03	4	Roupie Christophe Pierre Daniel	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		366.5800	-604	-221		5,882
2023-03-03	2023-03-01	4	Panchal Naineshkumar Shantilal	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		347.2700	-534	-185		6,200
2023-02-17	2023-02-15	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	A - Award	D			2,494			655,613
2023-02-17	2023-02-15	4	Pintoff Scott	MKTX	Common Stock, par value $0.003 per share	A - Award	D			1,194			7,406
2023-02-17	2023-02-15	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	A - Award	D			2,178			73,899
2023-02-17	2023-02-15	4	CONCANNON CHRISTOPHER R	MKTX	Common Stock, par value $0.003 per share	A - Award	D			1,967			40,167
2023-02-17	2023-02-15	4	Roupie Christophe Pierre Daniel	MKTX	Common Stock, par value $0.003 per share	A - Award	D			1,279			6,486
2023-02-17	2023-02-15	4	Panchal Naineshkumar Shantilal	MKTX	Common Stock, par value $0.003 per share	A - Award	D			913			6,734
2023-02-17	2023-02-15	4	Gerosa Christopher N.	MKTX	Common Stock, par value $0.003 per share	A - Award	D			328			1,944
2023-02-08	2023-02-07	4	Begleiter Steven L	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		348.7300	-1,000	-349		8,538
2023-02-02	2023-01-31	4	Roupie Christophe Pierre Daniel	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		363.8500	-199	-72		5,207
2023-02-02	2023-01-31	4	Roupie Christophe Pierre Daniel	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		363.8500	-71	-26		5,406
2023-02-02	2023-01-31	4	Roupie Christophe Pierre Daniel	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		363.8500	-202	-73		5,477
2023-02-02	2023-01-31	4	Roupie Christophe Pierre Daniel	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		363.8500	-68	-25		5,679
2023-02-02	2023-01-31	4	Gerosa Christopher N.	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		363.8500	-28	-10		1,616
2023-02-02	2023-01-31	4	Gerosa Christopher N.	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		363.8500	-98	-36		1,644
2023-02-02	2023-01-31	4	Gerosa Christopher N.	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		363.8500	-41	-15		1,742
2023-02-02	2023-01-31	4	CONCANNON CHRISTOPHER R	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		363.8500	-313	-114		38,200
2023-02-02	2023-01-31	4	CONCANNON CHRISTOPHER R	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		363.8500	-195	-71		38,513
2023-02-02	2023-01-31	4	CONCANNON CHRISTOPHER R	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		363.8500	-1,528	-556		38,708
2023-02-02	2023-01-31	4	CONCANNON CHRISTOPHER R	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		363.8500	-512	-186		40,236
2023-02-02	2023-01-31	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		363.8500	-277	-101		653,119
2023-02-02	2023-01-31	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		363.8500	-2,343	-853		653,396
2023-02-02	2023-01-31	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		363.8500	-711	-259		655,739
2023-02-02	2023-01-31	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		363.8500	-1,452	-528		656,450
2023-02-02	2023-01-31	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		363.8500	-4,032	-1,467		657,902
2023-02-02	2023-01-31	4	Pintoff Scott	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		363.8500	-169	-61		6,212
2023-02-02	2023-01-31	4	Pintoff Scott	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		363.8500	-126	-46		6,381
2023-02-02	2023-01-31	4	Pintoff Scott	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		363.8500	-307	-112		6,507
2023-02-02	2023-01-31	4	Pintoff Scott	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		363.8500	-103	-37		6,814
2023-02-02	2023-01-31	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	G - Gift	D			-300			71,721
2023-02-02	2023-01-31	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		363.8500	-278	-101		72,021
2023-02-02	2023-01-31	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		363.8500	-218	-79		72,299
2023-02-02	2023-01-31	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		363.8500	-408	-148		72,517
2023-02-02	2023-01-31	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		363.8500	-137	-50		72,925
2023-01-20	2023-01-18	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	A - Award	D			4,589			661,934
2023-01-20	2023-01-18	4	Roupie Christophe Pierre Daniel	MKTX	Common Stock, par value $0.003 per share	A - Award	D			429			5,747
2023-01-20	2023-01-18	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	A - Award	D			798			73,062
2023-01-20	2023-01-18	4	CONCANNON CHRISTOPHER R	MKTX	Common Stock, par value $0.003 per share	A - Award	D			2,993			40,748
2023-01-20	2023-01-18	4	Pintoff Scott	MKTX	Common Stock, par value $0.003 per share	A - Award	D			598			6,917
2023-01-17	2023-01-15	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		329.0200	-32,238	-10,607		657,345
2023-01-03	2022-08-18	5	Prager Richard Leon By GRAT	MKTX	Common Stock, par value $0.003 per share	G - Gift	I			-677			0
2023-01-03	2022-08-18	5	Prager Richard Leon	MKTX	Common Stock, par value $0.003 per share	G - Gift	D			677			3,323
2022-12-16	2022-12-15	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	G - Gift	D			-21,000			689,583
2022-12-12	2022-12-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		283.1600	-19,163	-5,426		710,583
2022-12-12	2022-12-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		156.8500	24,515	3,845		729,746
2022-08-03	2022-08-01	4	Gerosa Christopher N.	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		269.4000	-92	-25		1,783
2022-06-10	2022-06-08	4	Chwick Jane	MKTX	Common Stock, par value $0.003 per share	A - Award	D			497			6,674
2022-06-10	2022-06-08	4	Prager Richard Leon	MKTX	Common Stock, par value $0.003 per share	A - Award	D			497			2,646
2022-06-10	2022-06-08	4	Begleiter Steven L	MKTX	Common Stock, par value $0.003 per share	A - Award	D			497			9,538
2022-06-10	2022-06-08	4	Portney Emily Hope	MKTX	Common Stock, par value $0.003 per share	A - Award	D			497			2,294
2022-06-10	2022-06-08	4	KETCHUM RICHARD G	MKTX	Common Stock, par value $0.003 per share	A - Award	D			497			2,557
2022-06-10	2022-06-08	4	Cruger William Frank Jr.	MKTX	Common Stock, par value $0.003 per share	A - Award	D			497			6,661
2022-06-10	2022-06-08	4	Li Xiaojia Charles	MKTX	Common Stock, par value $0.003 per share	A - Award	D			497			768
2022-06-10	2022-06-08	4	Altobello Nancy A.	MKTX	Common Stock, par value $0.003 per share	A - Award	D			497			1,403
2022-06-10	2022-06-08	4	Casper Stephen P	MKTX	Common Stock, par value $0.003 per share	A - Award	D			586			9,539
2022-06-10	2022-06-08	4	Gmelich Justin Gerald	MKTX	Common Stock, par value $0.003 per share	A - Award	D			497			1,243
2022-06-10	2022-06-08	4	Gibson Kourtney	MKTX	Common Stock, par value $0.003 per share	A - Award	D			497			1,006
2022-06-09	2022-06-07	4	Roupie Christophe Pierre Daniel	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		285.0300	-1,740	-496		5,318
2022-04-25	2022-04-22	4	Prager Richard Leon	MKTX	Common Stock, par value $0.003 per share	P - Purchase	D		269.9900	500	135		2,149
2022-04-25	2022-04-22	4	Prager Richard Leon	MKTX	Common Stock, par value $0.003 per share	P - Purchase	D		272.5000	500	136		1,649
2022-03-09	2022-03-07	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		371.3800	-138	-51		8,544
2022-03-09	2022-03-07	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		370.3700	-325	-120		8,682
2022-03-09	2022-03-07	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		368.8700	-171	-63		9,007
2022-03-09	2022-03-07	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		367.4200	-315	-116		9,178
2022-03-09	2022-03-07	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		366.3900	-200	-73		9,493
2022-03-09	2022-03-07	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		365.1600	-8	-3		9,693
2022-03-09	2022-03-07	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		361.9100	-212	-77		9,701
2022-03-09	2022-03-07	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		361.0100	-109	-39		9,913
2022-03-09	2022-03-07	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		359.1800	-98	-35		10,022
2022-03-09	2022-03-07	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		358.1800	-424	-152		10,120
2022-03-03	2022-03-01	4	Panchal Naineshkumar Shantilal	MKTX	Common Stock, par value $0.003 per share	A - Award	D			2,658			5,821
2022-03-03	2022-03-01	4	Panchal Naineshkumar Shantilal	MKTX	Common Stock, par value $0.003 per share	A - Award	D			3,163			3,163
2022-03-03		3	Panchal Naineshkumar Shantilal	MKTX	Common Stock, par value $0.003 per share		D						0
2022-02-22	2022-02-19	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		372.0100	-7,279	-2,708		705,231
2022-02-16	2022-02-15	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		381.8400	-1,496	-571		712,510
2022-02-16	2022-02-15	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		381.8400	-732	-280		714,006
2022-02-16	2022-02-15	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		381.8400	-11,253	-4,297		714,738
2022-02-02	2022-01-31	4	Gerosa Christopher N.	MKTX	Stock Option (right to buy)	A - Award	D	344.48		540		540
2022-02-02	2022-01-31	4	Gerosa Christopher N.	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		344.4800	-101	-35		1,875
2022-02-02	2022-01-31	4	Gerosa Christopher N.	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		344.4800	-41	-14		1,976
2022-02-02	2022-01-31	4	Gerosa Christopher N.	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		344.4800	-56	-19		2,017
2022-02-02	2022-01-31	4	Gerosa Christopher N.	MKTX	Common Stock, par value $0.003 per share	A - Award	D			156			2,073
2022-02-02	2022-01-31	4	McVey Richard M	MKTX	Stock Option (right to buy)	A - Award	D	344.48		7,982		7,982
2022-02-02	2022-01-31	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		344.4800	-285	-98		725,991
2022-02-02	2022-01-31	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		344.4800	-504	-174		726,276
2022-02-02	2022-01-31	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		344.4800	-1,321	-455		726,780
2022-02-02	2022-01-31	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		344.4800	-4,032	-1,389		728,101
2022-02-02	2022-01-31	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	A - Award	D			2,300			732,133
2022-02-02	2022-01-31	4	Pintoff Scott	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		344.4800	-140	-48		6,319
2022-02-02	2022-01-31	4	Pintoff Scott	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		344.4800	-111	-38		6,459
2022-02-02	2022-01-31	4	Pintoff Scott	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		344.4800	-49	-17		6,570
2022-02-02	2022-01-31	4	Pintoff Scott	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		344.4800	-128	-44		6,619
2022-02-02	2022-01-31	4	Pintoff Scott	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		344.4800	-196	-68		6,747
2022-02-02	2022-01-31	4	Pintoff Scott	MKTX	Common Stock, par value $0.003 per share	A - Award	D			970			6,943
2022-02-02	2022-01-31	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		344.4800	-193	-66		26,993
2022-02-02	2022-01-31	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		344.4800	-126	-43		27,186
2022-02-02	2022-01-31	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		344.4800	-54	-19		27,312
2022-02-02	2022-01-31	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		344.4800	-141	-49		27,366
2022-02-02	2022-01-31	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		344.4800	-217	-75		27,507
2022-02-02	2022-01-31	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		344.4800	-308	-106		27,724
2022-02-02	2022-01-31	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		344.4800	-341	-117		28,032
2022-02-02	2022-01-31	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	A - Award	D			1,274			28,373
2022-02-02	2022-01-31	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		344.4800	-226	-78		72,264
2022-02-02	2022-01-31	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		344.4800	-137	-47		72,490
2022-02-02	2022-01-31	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		344.4800	-49	-17		72,627
2022-02-02	2022-01-31	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		344.4800	-127	-44		72,676
2022-02-02	2022-01-31	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		344.4800	-196	-68		72,803
2022-02-02	2022-01-31	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	A - Award	D			1,911			72,999
2022-02-02	2022-01-31	4	Roupie Christophe Pierre Daniel	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		344.4800	-73	-25		7,058
2022-02-02	2022-01-31	4	Roupie Christophe Pierre Daniel	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		344.4800	-68	-23		7,131
2022-02-02	2022-01-31	4	Roupie Christophe Pierre Daniel	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		344.4800	-749	-258		7,199
2022-02-02	2022-01-31	4	Roupie Christophe Pierre Daniel	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		344.4800	-175	-60		7,948
2022-02-02	2022-01-31	4	Roupie Christophe Pierre Daniel	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		344.4800	-392	-135		8,123
2022-02-02	2022-01-31	4	Roupie Christophe Pierre Daniel	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		344.4800	-92	-32		8,515
2022-02-02	2022-01-31	4	Roupie Christophe Pierre Daniel	MKTX	Common Stock, par value $0.003 per share	A - Award	D			1,243			8,607
2022-02-02	2022-01-31	4	CONCANNON CHRISTOPHER R	MKTX	Stock Option (right to buy)	A - Award	D	344.48		6,263		6,263
2022-02-02	2022-01-31	4	CONCANNON CHRISTOPHER R	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		344.4800	-202	-70		37,755
2022-02-02	2022-01-31	4	CONCANNON CHRISTOPHER R	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		344.4800	-511	-176		37,957
2022-02-02	2022-01-31	4	CONCANNON CHRISTOPHER R	MKTX	Common Stock, par value $0.003 per share	A - Award	D			1,805			38,468
2022-02-02	2022-01-31	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		344.4800	-274	-94		10,544
2022-02-02	2022-01-31	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		344.4800	-159	-55		10,818
2022-02-02	2022-01-31	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		344.4800	-59	-20		10,977
2022-02-02	2022-01-31	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		344.4800	-154	-53		11,036
2022-02-02	2022-01-31	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		344.4800	-237	-82		11,190
2022-02-02	2022-01-31	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	A - Award	D			1,840			11,427
2022-01-24	2022-01-22	4	CONCANNON CHRISTOPHER R	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		364.5800	-2,382	-868		36,663
2022-01-24	2022-01-22	4	CONCANNON CHRISTOPHER R	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		364.5800	-3,931	-1,433		39,045
2022-01-19	2022-01-15	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		371.5400	-6,810	-2,530		729,833
2021-12-16	2021-12-14	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	G - Gift	D			-25,000			736,643
2021-12-09	2021-12-07	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		372.7500	-322	-120		9,587
2021-12-09	2021-12-07	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		371.4500	-500	-186		9,909
2021-12-09	2021-12-07	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		370.5700	-578	-214		10,409
2021-12-09	2021-12-07	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		368.9000	-300	-111		10,987
2021-12-09	2021-12-07	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		366.9900	-100	-37		11,287
2021-12-09	2021-12-07	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		364.2800	-200	-73		11,387
2021-11-18	2021-11-16	4	McPherson Kevin M	MKTX	Stock Option (right to buy)	M - Exercise	D	103.30		-936		0
2021-11-18	2021-11-16	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		391.7200	-936	-367		71,088
2021-11-18	2021-11-16	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		103.3000	936	97		72,024
2021-10-29	2021-10-29	4	Prager Richard Leon By GRAT	MKTX	Common Stock, par value $0.003 per share	G - Gift	I			-611			677
2021-10-29	2021-10-29	4	Prager Richard Leon	MKTX	Common Stock, par value $0.003 per share	G - Gift	D			611			1,149
2021-09-09	2021-09-07	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		473.4000	-200	-95		11,587
2021-09-09	2021-09-07	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		466.0100	-200	-93		11,787
2021-09-09	2021-09-07	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		463.3300	-100	-46		11,987
2021-09-09	2021-09-07	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		461.3100	-100	-46		12,087
2021-09-09	2021-09-07	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		460.3600	-500	-230		12,187
2021-09-09	2021-09-07	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		458.5800	-800	-367		12,687
2021-09-09	2021-09-07	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		456.8500	-100	-46		13,487
2021-08-23	2021-08-20	4	McPherson Kevin M	MKTX	Stock Option (right to buy)	M - Exercise	D	103.30		-4,864		936
2021-08-23	2021-08-20	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		480.0400	-647	-311		71,088
2021-08-23	2021-08-20	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		478.2400	-403	-193		71,735
2021-08-23	2021-08-20	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		475.8600	-1	-0		72,138
2021-08-23	2021-08-20	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		475.2200	-3,813	-1,812		72,139
2021-08-23	2021-08-20	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		103.3000	4,864	502		75,952
2021-08-23	2021-08-19	4	McPherson Kevin M	MKTX	Stock Option (right to buy)	M - Exercise	D	103.30		-535		5,800
2021-08-23	2021-08-19	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		474.0200	-535	-254		71,088
2021-08-23	2021-08-19	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		103.3000	535	55		71,623
2021-08-17	2021-08-13	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		464.7600	-933	-434		27,099
2021-08-17	2021-08-13	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		464.0000	-567	-263		28,032
2021-08-12	2021-08-10	4	McPherson Kevin M	MKTX	Stock Option (right to buy)	M - Exercise	D	103.30		-5,000		6,335
2021-08-12	2021-08-10	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		479.0100	-900	-431		71,088
2021-08-12	2021-08-10	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		478.2700	-1,265	-605		71,988
2021-08-12	2021-08-10	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		477.5100	-1,205	-575		73,253
2021-08-12	2021-08-10	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		475.5800	-130	-62		74,458
2021-08-12	2021-08-10	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		474.1100	-176	-83		74,588
2021-08-12	2021-08-10	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		473.1900	-750	-355		74,764
2021-08-12	2021-08-10	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		472.0300	-574	-271		75,514
2021-08-12	2021-08-10	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		103.3000	5,000	516		76,088
2021-08-12	2021-08-11	4	Themelis Nicholas	MKTX	Stock Option (right to buy)	M - Exercise	D	103.30		-6,433		0
2021-08-12	2021-08-11	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		470.4600	-152	-72		13,587
2021-08-12	2021-08-11	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		468.8800	-135	-63		13,739
2021-08-12	2021-08-11	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		468.2200	-376	-176		13,874
2021-08-12	2021-08-11	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		466.4500	-347	-162		14,250
2021-08-12	2021-08-11	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		465.6400	-90	-42		14,597
2021-08-12	2021-08-11	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		464.7100	-502	-233		14,687
2021-08-12	2021-08-11	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		462.9300	-1,266	-586		15,189
2021-08-12	2021-08-11	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		462.1300	-654	-302		16,455
2021-08-12	2021-08-11	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		460.7000	-1,732	-798		17,109
2021-08-12	2021-08-11	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		460.0600	-1,179	-542		18,841
2021-08-12	2021-08-11	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		103.3000	6,433	665		20,020
2021-08-12	2021-08-10	4	DELISE ANTONIO L	MKTX	Stock Option (right to buy)	M - Exercise	D	156.85		-1,547		0
2021-08-12	2021-08-10	4	DELISE ANTONIO L	MKTX	Stock Option (right to buy)	M - Exercise	D	103.30		-3,092		0
2021-08-12	2021-08-10	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		483.5700	-350	-169		28,599
2021-08-12	2021-08-10	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		481.1300	-150	-72		28,949
2021-08-12	2021-08-10	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		478.8700	-650	-311		29,099
2021-08-12	2021-08-10	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		477.6500	-1,599	-764		29,749
2021-08-12	2021-08-10	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		476.4700	-1,540	-734		31,348
2021-08-12	2021-08-10	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		475.3400	-350	-166		32,888
2021-08-12	2021-08-10	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		156.8500	1,547	243		33,238
2021-08-12	2021-08-10	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		103.3000	3,092	319		31,691
2021-08-11	2021-08-09	4	Pintoff Scott	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		487.0500	-250	-122		5,973
2021-08-11	2021-08-10	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		485.0000	-200	-97		761,643
2021-08-11	2021-08-10	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		484.0600	-200	-97		761,843
2021-08-11	2021-08-10	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		482.3500	-300	-145		762,043
2021-08-11	2021-08-10	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		481.2800	-600	-289		762,343
2021-08-11	2021-08-09	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		489.7500	-212	-104		762,943
2021-08-11	2021-08-09	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		489.1000	-488	-239		763,155
2021-08-11	2021-08-09	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		487.0500	-800	-390		763,643
2021-08-11	2021-08-09	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		486.1500	-490	-238		764,443
2021-08-11	2021-08-09	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		485.0700	-2,315	-1,123		764,933
2021-08-11	2021-08-09	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		484.1400	-5,491	-2,658		767,248
2021-08-11	2021-08-09	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		483.3600	-2,321	-1,122		772,739
2021-08-03	2021-08-01	4	Gerosa Christopher N.	MKTX	Stock Option (right to buy)	A - Award	D	475.17		1,915		1,915
2021-08-03	2021-08-01	4	Gerosa Christopher N.	MKTX	Common Stock, par value $0.003 per share	A - Award	D			535			1,917
2021-08-03	2021-08-01	4	Prager Richard Leon	MKTX	Common Stock, par value $0.003 per share	A - Award	D			300			538
2021-08-03	2021-08-01	4	Portney Emily Hope	MKTX	Common Stock, par value $0.003 per share	A - Award	D			300			1,797
2021-08-03	2021-08-01	4	Li Xiaojia Charles	MKTX	Common Stock, par value $0.003 per share	A - Award	D			271			271
2021-08-03	2021-08-01	4	Gmelich Justin Gerald	MKTX	Common Stock, par value $0.003 per share	A - Award	D			300			746
2021-08-03	2021-08-01	4	KETCHUM RICHARD G	MKTX	Common Stock, par value $0.003 per share	A - Award	D			300			2,060
2021-08-03	2021-08-01	4	Gibson Kourtney	MKTX	Common Stock, par value $0.003 per share	A - Award	D			300			509
2021-08-03	2021-08-01	4	Cruger William Frank Jr.	MKTX	Common Stock, par value $0.003 per share	A - Award	D			300			6,164
2021-08-03	2021-08-01	4	Chwick Jane	MKTX	Common Stock, par value $0.003 per share	A - Award	D			300			6,177
2021-08-03	2021-08-01	4	Casper Stephen P	MKTX	Common Stock, par value $0.003 per share	A - Award	D			353			8,953
2021-08-03	2021-08-01	4	Begleiter Steven L	MKTX	Common Stock, par value $0.003 per share	A - Award	D			300			9,041
2021-08-03	2021-08-01	4	Altobello Nancy A.	MKTX	Common Stock, par value $0.003 per share	A - Award	D			300			906
2021-08-02		3	Gerosa Christopher N.	MKTX	Common Stock, par value $0.003 per share		D						1,382
2021-06-15	2021-06-14	4	Themelis Nicholas	MKTX	Stock Option (right to buy)	M - Exercise	D	103.30		-7,000		6,433
2021-06-15	2021-06-14	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		449.1300	-2,287	-1,027		13,587
2021-06-15	2021-06-14	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		448.4000	-4,713	-2,113		15,874
2021-06-15	2021-06-14	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		103.3000	7,000	723		20,587
2021-06-08	2021-06-07	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		448.5100	-315	-141		13,587
2021-06-08	2021-06-07	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		447.4700	-464	-208		13,902
2021-06-08	2021-06-07	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		446.4200	-488	-218		14,366
2021-06-08	2021-06-07	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		445.5700	-441	-196		14,854
2021-06-08	2021-06-07	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		444.3400	-864	-384		15,295
2021-06-08	2021-06-07	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		443.4000	-1,043	-462		16,159
2021-06-08	2021-06-07	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		442.5200	-385	-170		17,202
2021-06-07	2021-06-03	4	McVey Richard M	MKTX	Stock Option (right to buy)	M - Exercise	D	101.77		-27,020		0
2021-06-07	2021-06-03	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		444.2100	-16,391	-7,281		775,060
2021-06-07	2021-06-03	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		101.7700	27,020	2,750		791,451
2021-05-27	2021-05-26	4	Roupie Christophe Pierre Daniel	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		465.0800	-967	-450		7,364
2021-05-27	2021-05-26	4	DELISE ANTONIO L	MKTX	Stock Option (right to buy)	M - Exercise	D	103.30		-4,968		3,092
2021-05-27	2021-05-26	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		462.8900	-1,384	-641		28,599
2021-05-27	2021-05-26	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		462.0700	-2,616	-1,209		29,983
2021-05-27	2021-05-26	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		103.3000	4,968	513		32,599
2021-05-27	2021-05-26	4	McPherson Kevin M	MKTX	Stock Option (right to buy)	M - Exercise	D	103.30		-4,717		11,335
2021-05-27	2021-05-26	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		465.9100	-469	-219		71,088
2021-05-27	2021-05-26	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		465.0300	-1,416	-658		71,557
2021-05-27	2021-05-26	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		464.2100	-906	-421		72,973
2021-05-27	2021-05-26	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		462.8300	-1,926	-891		73,879
2021-05-27	2021-05-26	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		103.3000	4,717	487		75,805
2021-05-27	2021-05-25	4	McPherson Kevin M	MKTX	Stock Option (right to buy)	M - Exercise	D	103.30		-283		16,052
2021-05-27	2021-05-25	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		460.1000	-283	-130		71,088
2021-05-27	2021-05-25	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		103.3000	283	29		71,371
2021-05-24	2021-05-24	4	Pintoff Scott	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		460.0200	-100	-46		6,223
2021-05-19	2021-05-17	4	Pintoff Scott	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		460.4500	-80	-37		6,323
2021-05-19	2021-05-17	4	Pintoff Scott	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		460.3000	-70	-32		6,403
2021-05-13	2021-05-13	4	McPherson Kevin M	MKTX	Stock Option (right to buy)	M - Exercise	D	103.30		-3,000		16,335
2021-05-13	2021-05-13	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		454.5100	-100	-45		71,088
2021-05-13	2021-05-13	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		453.4700	-400	-181		71,188
2021-05-13	2021-05-13	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		452.5300	-450	-204		71,588
2021-05-13	2021-05-13	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		451.3500	-1,000	-451		72,038
2021-05-13	2021-05-13	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		450.4700	-1,050	-473		73,038
2021-05-13	2021-05-13	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		103.3000	3,000	310		74,088
2021-05-13	2021-05-11	4	McPherson Kevin M	MKTX	Stock Option (right to buy)	M - Exercise	D	103.30		-3,000		19,335
2021-05-13	2021-05-11	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		448.8900	-50	-22		71,088
2021-05-13	2021-05-11	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		447.8600	-797	-357		71,138
2021-05-13	2021-05-11	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		447.1500	-903	-404		71,935
2021-05-13	2021-05-11	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		446.0800	-1,250	-558		72,838
2021-05-13	2021-05-11	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		103.3000	3,000	310		74,088
2021-05-07	2021-05-06	4	McPherson Kevin M	MKTX	Stock Option (right to buy)	M - Exercise	D	103.30		-3		22,335
2021-05-07	2021-05-06	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		445.0000	-3	-1		71,088
2021-05-07	2021-05-06	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		103.3000	3	0		71,091
2021-05-07	2021-05-05	4	McPherson Kevin M	MKTX	Stock Option (right to buy)	M - Exercise	D	103.30		-50		22,338
2021-05-07	2021-05-05	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		470.0000	-50	-24		71,088
2021-05-07	2021-05-05	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		103.3000	50	5		71,138
2021-04-27	2021-01-15	4/A	McVey Richard M	MKTX	Stock Option (right to buy)	A - Award	D	523.00		6,187		6,187
2021-04-27	2021-01-15	4/A	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	A - Award	D			1,641			797,704
2021-04-02	2021-04-01	4	Roupie Christophe Pierre Daniel	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		520.2800	-309	-161		8,331
2021-04-02	2021-04-01	4	Roupie Christophe Pierre Daniel	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		520.2800	-551	-287		8,640
2021-04-02	2021-04-01	4	Roupie Christophe Pierre Daniel	MKTX	Common Stock, par value $0.003 per share	A - Award	D			656			9,191
2021-04-02	2021-04-01	4	Roupie Christophe Pierre Daniel	MKTX	Common Stock, par value $0.003 per share	A - Award	D			1,171			8,535
2021-03-17	2021-03-15	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		532.7600	-100	-53		766,073
2021-03-17	2021-03-15	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		530.9600	-100	-53		766,173
2021-03-17	2021-03-15	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		528.6100	-100	-53		766,273
2021-03-17	2021-03-15	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		525.0000	-200	-105		766,373
2021-03-17	2021-03-15	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		523.6800	-400	-209		766,573
2021-03-17	2021-03-15	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		522.9800	-985	-515		766,973
2021-03-17	2021-03-15	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		521.6800	-879	-459		767,958
2021-03-17	2021-03-15	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		520.8300	-2,076	-1,081		768,837
2021-03-17	2021-03-15	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		519.9000	-4,169	-2,167		770,913
2021-03-17	2021-03-15	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		518.8100	-1,430	-742		775,082
2021-03-17	2021-03-15	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		517.8100	-2,851	-1,476		776,512
2021-03-17	2021-03-15	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		516.7300	-2,603	-1,345		779,363
2021-03-17	2021-03-15	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		515.8400	-2,846	-1,468		781,966
2021-03-17	2021-03-15	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		514.8200	-771	-397		784,812
2021-03-17	2021-03-15	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		513.7600	-490	-252		785,583
2021-03-12	2021-03-11	4	Casper Stephen P By family trust	MKTX	Common Stock, par value $0.003 per share	G - Gift	I			2,000			44,808
2021-03-12	2021-03-11	4	Casper Stephen P	MKTX	Common Stock, par value $0.003 per share	G - Gift	D			-2,000			8,600
2021-03-08	2021-03-05	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		488.1000	-300	-146		17,587
2021-03-08	2021-03-05	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		483.6300	-300	-145		17,887
2021-03-08	2021-03-05	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		481.0100	-103	-50		18,187
2021-03-08	2021-03-05	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		479.7800	-352	-169		18,290
2021-03-08	2021-03-05	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		478.1900	-200	-96		18,642
2021-03-08	2021-03-05	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		477.0400	-639	-305		18,842
2021-03-08	2021-03-05	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		476.3600	-1,206	-574		19,481
2021-03-08	2021-03-05	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		474.6000	-900	-427		20,687
2021-03-02	2021-03-01	4	Roupie Christophe Pierre Daniel	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		575.0000	-2,116	-1,217		7,364
2021-02-25	2021-02-24	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		547.7000	-10	-5		27,631
2021-02-25	2021-02-24	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		546.7100	-690	-377		27,641
2021-02-25	2021-02-24	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		545.6500	-1,800	-982		28,331
2021-02-16	2021-02-15	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		552.5500	-3,692	-2,040		786,073
2021-02-16	2021-02-15	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		552.5500	-6,606	-3,650		789,765
2021-02-08	2021-02-08	4	Pintoff Scott	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		572.3200	-250	-143		6,473
2021-02-02	2021-01-31	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		540.7600	-1,180	-638		796,371
2021-02-02	2021-01-31	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		540.7600	-1,345	-727		797,551
2021-02-02	2021-01-31	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		540.7600	-450	-243		798,896
2021-02-02	2021-01-31	4	CONCANNON CHRISTOPHER R	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		540.7600	-505	-273		42,976
2021-02-02	2021-01-31	4	Roupie Christophe Pierre Daniel	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		540.7600	-889	-481		9,480
2021-02-02	2021-01-31	4	Roupie Christophe Pierre Daniel	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		540.7600	-392	-212		10,369
2021-02-02	2021-01-31	4	Roupie Christophe Pierre Daniel	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		540.7600	-208	-112		10,761
2021-02-02	2021-01-31	4	Roupie Christophe Pierre Daniel	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		540.7600	-118	-64		10,969
2021-02-02	2021-01-31	4	Roupie Christophe Pierre Daniel	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		540.7600	-70	-38		11,087
2021-02-02	2021-01-31	4	Roupie Christophe Pierre Daniel	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		540.7600	-92	-50		11,157
2021-02-02	2021-01-31	4	Roupie Christophe Pierre Daniel	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		540.7600	-116	-63		11,249
2021-02-02	2021-01-31	4	Pintoff Scott	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		540.7600	-47	-25		6,723
2021-02-02	2021-01-31	4	Pintoff Scott	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		540.7600	-110	-59		6,770
2021-02-02	2021-01-31	4	Pintoff Scott	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		540.7600	-140	-76		6,880
2021-02-02	2021-01-31	4	Pintoff Scott	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		540.7600	-123	-67		7,020
2021-02-02	2021-01-31	4	Pintoff Scott	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		540.7600	-189	-102		7,143
2021-02-02	2021-01-31	4	Pintoff Scott	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		540.7600	-883	-477		7,332
2021-02-02	2021-01-31	4	Pintoff Scott	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		540.7600	-114	-62		8,215
2021-02-02	2021-01-31	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		540.7600	-426	-230		30,131
2021-02-02	2021-01-31	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		540.7600	-7	-4		30,557
2021-02-02	2021-01-31	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		540.7600	-143	-77		30,564
2021-02-02	2021-01-31	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		540.7600	-1,546	-836		30,707
2021-02-02	2021-01-31	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		540.7600	-209	-113		32,253
2021-02-02	2021-01-31	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		540.7600	-104	-56		32,462
2021-02-02	2021-01-31	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		540.7600	-175	-95		32,566
2021-02-02	2021-01-31	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		540.7600	-135	-73		32,741
2021-02-02	2021-01-31	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		540.7600	-123	-67		32,876
2021-02-02	2021-01-31	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		540.7600	-52	-28		32,999
2021-02-02	2021-01-31	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		540.7600	-1,274	-689		33,051
2021-02-02	2021-01-31	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		540.7600	-466	-252		34,325
2021-02-02	2021-01-31	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		540.7600	-11	-6		21,587
2021-02-02	2021-01-31	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		540.7600	-147	-79		21,598
2021-02-02	2021-01-31	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		540.7600	-2,122	-1,147		21,745
2021-02-02	2021-01-31	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		540.7600	-226	-122		23,867
2021-02-02	2021-01-31	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		540.7600	-173	-94		24,093
2021-02-02	2021-01-31	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		540.7600	-2,830	-1,530		24,266
2021-02-02	2021-01-31	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		540.7600	-56	-30		27,096
2021-02-02	2021-01-31	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		540.7600	-157	-85		27,152
2021-02-02	2021-01-31	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		540.7600	-228	-123		27,309
2021-02-02	2021-01-31	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		540.7600	-227	-123		27,537
2021-02-02	2021-01-31	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		540.7600	-47	-25		71,088
2021-02-02	2021-01-31	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		540.7600	-1,769	-957		71,135
2021-02-02	2021-01-31	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		540.7600	-181	-98		72,904
2021-02-02	2021-01-31	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		540.7600	-121	-65		73,085
2021-02-02	2021-01-31	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		540.7600	-2,358	-1,275		73,206
2021-02-02	2021-01-31	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		540.7600	-144	-78		75,564
2021-02-02	2021-01-31	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		540.7600	-187	-101		75,708
2021-02-02	2021-01-31	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		540.7600	-10	-5		75,895
2021-02-02	2021-01-31	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		540.7600	-135	-73		75,905
2021-02-02	2021-01-31	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		540.7600	-147	-79		76,040
2021-01-26	2021-01-22	4	CONCANNON CHRISTOPHER R	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		509.7000	-3,771	-1,922		43,481
2021-01-20	2021-01-15	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	A - Award	D			1,572			27,764
2021-01-20	2021-01-15	4	Pintoff Scott	MKTX	Common Stock, par value $0.003 per share	A - Award	D			740			8,329
2021-01-20	2021-01-15	4	Roupie Christophe Pierre Daniel	MKTX	Common Stock, par value $0.003 per share	A - Award	D			451			11,365
2021-01-20	2021-01-15	4	McVey Richard M	MKTX	Stock Option (right to buy)	A - Award	D	523.00		6,187		6,187
2021-01-20	2021-01-15	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	A - Award	D			3,283			799,346
2021-01-20	2021-01-15	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	A - Award	D			1,295			76,187
2021-01-20	2021-01-15	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	A - Award	D			1,110			34,791
2021-01-20	2021-01-15	4	CONCANNON CHRISTOPHER R	MKTX	Stock Option (right to buy)	A - Award	D	523.00		4,358		4,358
2021-01-20	2021-01-15	4	CONCANNON CHRISTOPHER R	MKTX	Common Stock, par value $0.003 per share	A - Award	D			1,156			47,252
2020-12-16	2020-12-15	4	Casper Stephen P	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		554.9600	-750	-416		10,600
2020-12-15	2020-12-14	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	G - Gift	D			-15,000			796,063
2020-12-09	2020-12-08	4	DELISE ANTONIO L	MKTX	Stock Option (right to buy)	M - Exercise	D	156.85		-1,274		1,547
2020-12-09	2020-12-08	4	DELISE ANTONIO L	MKTX	Stock Option (right to buy)	M - Exercise	D	103.30		-968		8,060
2020-12-09	2020-12-08	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		156.8500	1,274	200		33,681
2020-12-09	2020-12-08	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		103.3000	968	100		32,407
2020-12-09	2020-12-08	4	Pintoff Scott	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		566.1300	-250	-142		7,589
2020-12-09	2020-12-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		568.9200	-100	-57		811,063
2020-12-09	2020-12-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		567.4000	-2,463	-1,398		811,163
2020-12-09	2020-12-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		566.4600	-8,969	-5,081		813,626
2020-12-09	2020-12-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		565.5600	-12,253	-6,930		822,595
2020-12-09	2020-12-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		564.6500	-10,718	-6,052		834,848
2020-12-09	2020-12-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		563.5300	-2,790	-1,572		845,566
2020-12-09	2020-12-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		562.3900	-2,000	-1,125		848,356
2020-12-09	2020-12-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		561.3800	-1,707	-958		850,356
2020-12-09	2020-12-09	4	Steinhardt John	MKTX	Common Stock, par value $0.003 per share	G - Gift	D			-961			21,313
2020-12-09	2020-12-07	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		553.1000	-63	-35		26,192
2020-12-09	2020-12-07	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		549.5900	-410	-225		26,255
2020-12-09	2020-12-07	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		548.2100	-697	-382		27,195
2020-12-09	2020-12-07	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		547.3400	-530	-290		26,665
2020-12-09	2020-12-07	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		546.3100	-305	-167		27,892
2020-12-09	2020-12-07	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		545.1400	-1,464	-798		28,197
2020-12-09	2020-12-07	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		544.0400	-531	-289		29,661
2020-12-04	2020-12-03	4	McVey Richard M	MKTX	Stock Option (right to buy)	M - Exercise	D	21.56		-26,779		0
2020-12-04	2020-12-03	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		555.6300	-13,999	-7,778		852,063
2020-12-04	2020-12-03	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		21.5600	26,779	577		866,062
2020-11-13	2020-11-12	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		551.6400	-24	-13		31,439
2020-11-13	2020-11-12	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		550.3600	-460	-253		31,463
2020-11-13	2020-11-12	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		544.1200	-249	-135		31,923
2020-11-13	2020-11-12	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		542.6500	-369	-200		32,172
2020-11-13	2020-11-12	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		541.4700	-265	-143		32,541
2020-11-13	2020-11-12	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		539.6700	-41	-22		32,806
2020-11-13	2020-11-12	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		539.0600	-600	-323		32,847
2020-11-13	2020-11-12	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		537.7800	-492	-265		33,447
2020-11-12	2020-11-09	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		565.4600	-973	-550		855,622
2020-11-12	2020-11-09	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		564.3100	-1,038	-586		856,595
2020-11-12	2020-11-09	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		563.2200	-343	-193		857,633
2020-11-12	2020-11-09	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		562.2800	-1,400	-787		857,976
2020-11-12	2020-11-09	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		561.1700	-2,324	-1,304		859,376
2020-11-12	2020-11-09	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		560.1500	-1,499	-840		861,700
2020-11-12	2020-11-09	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		559.1400	-1,105	-618		863,199
2020-11-12	2020-11-09	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		557.9700	-606	-338		864,304
2020-11-12	2020-11-09	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		556.9500	-568	-316		864,910
2020-11-12	2020-11-09	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		555.7100	-469	-261		865,478
2020-11-12	2020-11-09	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		554.9800	-1,435	-796		865,947
2020-11-12	2020-11-09	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		554.0700	-922	-511		867,382
2020-11-12	2020-11-09	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		552.6100	-680	-376		868,304
2020-11-12	2020-11-09	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		551.8300	-698	-385		868,984
2020-11-12	2020-11-09	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		550.5700	-325	-179		869,682
2020-11-12	2020-11-09	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		549.3100	-510	-280		870,007
2020-11-12	2020-11-09	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		548.5500	-333	-183		870,517
2020-11-12	2020-11-09	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		547.5200	-1,406	-770		870,850
2020-11-12	2020-11-09	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		546.3600	-1,048	-573		872,256
2020-11-12	2020-11-09	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		545.3100	-569	-310		873,304
2020-11-12	2020-11-09	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		543.9300	-302	-164		873,873
2020-11-12	2020-11-09	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		542.2400	-200	-108		874,175
2020-11-12	2020-11-09	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		540.8400	-300	-162		874,375
2020-11-12	2020-11-09	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		539.6300	-1,402	-757		874,675
2020-11-12	2020-11-09	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		538.6400	-968	-521		876,077
2020-11-12	2020-11-09	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		537.3800	-985	-529		877,045
2020-11-12	2020-11-09	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		536.3900	-300	-161		878,030
2020-11-12	2020-11-09	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		535.6000	-1,461	-783		878,330
2020-11-12	2020-11-09	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		534.4300	-1,492	-797		879,791
2020-11-12	2020-10-29	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	G - Gift	D			-50,000			881,283
2020-11-12	2020-11-10	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		529.9000	-100	-53		839,283
2020-11-12	2020-11-10	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		528.6300	-910	-481		839,383
2020-11-12	2020-11-10	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		527.6900	-490	-259		840,293
2020-11-12	2020-11-10	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		526.3900	-1,401	-737		840,783
2020-11-12	2020-11-10	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		525.4200	-1,715	-901		842,184
2020-11-12	2020-11-10	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		524.4400	-2,455	-1,288		843,899
2020-11-12	2020-11-10	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		523.4800	-1,104	-578		846,354
2020-11-12	2020-11-10	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		522.3200	-400	-209		847,458
2020-11-12	2020-11-10	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		520.6000	-300	-156		847,858
2020-11-12	2020-11-10	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		518.6300	-200	-104		848,158
2020-11-12	2020-11-10	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		517.8100	-170	-88		848,358
2020-11-12	2020-11-10	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		516.4500	-153	-79		848,528
2020-11-12	2020-11-10	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		515.4500	-831	-428		848,681
2020-11-12	2020-11-10	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		514.4800	-196	-101		849,512
2020-11-12	2020-11-10	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		513.2800	-300	-154		849,708
2020-11-12	2020-11-10	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		512.1000	-300	-154		850,008
2020-11-12	2020-11-10	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		510.5100	-600	-306		850,308
2020-11-12	2020-11-10	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		509.3100	-522	-266		850,908
2020-11-12	2020-11-10	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		508.4600	-878	-446		851,430
2020-11-12	2020-11-09	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		604.6100	-300	-181		852,308
2020-11-12	2020-11-09	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		586.5400	-700	-411		852,608
2020-11-12	2020-11-09	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		573.1400	-54	-31		853,308
2020-11-12	2020-11-09	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		571.9800	-27	-15		853,362
2020-11-12	2020-11-09	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		571.0700	-312	-178		853,389
2020-11-12	2020-11-09	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		569.8100	-325	-185		853,701
2020-11-12	2020-11-09	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		568.4700	-194	-110		854,026
2020-11-12	2020-11-09	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		567.8700	-601	-341		854,220
2020-11-12	2020-11-09	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		566.4300	-801	-454		854,821
2020-11-05	2020-11-03	4	DELISE ANTONIO L	MKTX	Stock Option (right to buy)	M - Exercise	D	103.30		-7,092		9,028
2020-11-05	2020-11-03	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		542.5900	-85	-46		33,939
2020-11-05	2020-11-03	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		541.8900	-1,365	-740		34,024
2020-11-05	2020-11-03	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		540.5600	-1,182	-639		35,389
2020-11-05	2020-11-03	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		539.3700	-1,568	-846		36,571
2020-11-05	2020-11-03	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		103.3000	7,092	733		38,139
2020-11-05	2020-11-03	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	G - Gift	D			-300			31,047
2020-11-05	2020-11-04	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		577.5000	-2,000	-1,155		74,892
2020-11-05	2020-11-03	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		540.0000	-2,000	-1,080		76,892
2020-10-30	2020-10-29	4	Themelis Nicholas	MKTX	Stock Option (right to buy)	M - Exercise	D	156.85		-3,830		0
2020-10-30	2020-10-29	4	Themelis Nicholas	MKTX	Stock Option (right to buy)	M - Exercise	D	103.30		-13,432		13,433
2020-10-30	2020-10-29	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		557.8100	-5,598	-3,123		30,192
2020-10-30	2020-10-29	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		556.6900	-600	-334		35,790
2020-10-30	2020-10-29	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		554.2300	-100	-55		36,390
2020-10-30	2020-10-29	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		553.2100	-9,324	-5,158		36,490
2020-10-30	2020-10-29	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		552.0600	-1,440	-795		45,814
2020-10-30	2020-10-29	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		551.2700	-200	-110		47,254
2020-10-30	2020-10-29	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		156.8500	3,830	601		47,454
2020-10-30	2020-10-29	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		103.3000	13,432	1,388		43,624
2020-09-10	2020-09-09	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		463.1100	-991	-459		931,283
2020-09-10	2020-09-09	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		462.1700	-1,852	-856		932,274
2020-09-10	2020-09-09	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		461.1900	-1,270	-586		934,126
2020-09-10	2020-09-09	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		460.0000	-1,521	-700		935,396
2020-09-10	2020-09-09	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		458.9500	-1,340	-615		936,917
2020-09-10	2020-09-09	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		457.8500	-1,284	-588		938,257
2020-09-10	2020-09-09	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		457.0100	-723	-330		939,541
2020-09-10	2020-09-09	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		455.9900	-602	-275		940,264
2020-09-10	2020-09-09	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		452.9800	-400	-181		940,866
2020-09-10	2020-09-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		454.1200	-4	-2		941,266
2020-09-10	2020-09-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		453.2800	-2,825	-1,281		941,270
2020-09-10	2020-09-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		452.3900	-7,960	-3,601		944,095
2020-09-10	2020-09-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		451.4100	-6,077	-2,743		952,055
2020-09-10	2020-09-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		450.3200	-7,766	-3,497		958,132
2020-09-10	2020-09-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		449.5500	-5,283	-2,375		965,898
2020-09-10	2020-09-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		448.6100	-350	-157		971,181
2020-09-10	2020-09-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		447.2400	-162	-72		971,531
2020-09-10	2020-09-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		446.1200	-325	-145		971,693
2020-09-10	2020-09-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		445.2300	-364	-162		972,018
2020-09-10	2020-09-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		444.2400	-601	-267		972,382
2020-09-10	2020-09-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		442.5100	-102	-45		972,983
2020-09-10	2020-09-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		441.8500	-198	-87		973,085
2020-09-10	2020-09-09	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		459.6500	-524	-241		30,192
2020-09-10	2020-09-09	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		458.4800	-200	-92		30,716
2020-09-10	2020-09-09	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		457.6900	-1,779	-814		30,916
2020-09-10	2020-09-09	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		456.4500	-745	-340		32,695
2020-09-10	2020-09-09	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		455.0800	-201	-91		33,440
2020-09-10	2020-09-09	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		453.4700	-351	-159		33,641
2020-09-10	2020-09-09	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		450.9000	-200	-90		33,992
2020-08-28	2020-08-27	4	Casper Stephen P	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		500.0000	-500	-250		11,350
2020-08-17	2020-08-13	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		492.8700	-52	-26		31,347
2020-08-17	2020-08-13	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		491.7720	-377	-185		31,399
2020-08-17	2020-08-13	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		490.9410	-430	-211		31,776
2020-08-17	2020-08-13	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		489.9500	-574	-281		32,206
2020-08-17	2020-08-13	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		488.8610	-66	-32		32,780
2020-08-17	2020-08-13	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		487.1270	-57	-28		32,846
2020-08-17	2020-08-13	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		485.8910	-681	-331		32,903
2020-08-17	2020-08-13	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		484.4250	-263	-127		33,584
2020-08-11	2020-08-10	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		508.8800	-200	-102		973,283
2020-08-11	2020-08-10	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		503.3000	-306	-154		973,483
2020-08-11	2020-08-10	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		502.1800	-1,100	-552		973,789
2020-08-11	2020-08-10	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		500.9800	-400	-200		974,889
2020-08-11	2020-08-10	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		496.5700	-188	-93		975,289
2020-08-11	2020-08-10	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		495.9100	-512	-254		975,477
2020-08-11	2020-08-10	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		493.6100	-200	-99		975,989
2020-08-11	2020-08-10	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		492.1200	-400	-197		976,189
2020-08-11	2020-08-10	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		491.1500	-564	-277		976,589
2020-08-11	2020-08-10	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		490.2800	-615	-302		977,153
2020-08-11	2020-08-10	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		489.1500	-4,379	-2,142		977,768
2020-08-11	2020-08-10	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		488.2900	-1,696	-828		982,147
2020-08-11	2020-08-10	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		487.1600	-1,838	-895		983,843
2020-08-11	2020-08-10	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		486.0300	-2,106	-1,024		985,681
2020-08-11	2020-08-10	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		485.1700	-2,215	-1,075		987,787
2020-08-11	2020-08-10	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		483.9900	-2,518	-1,219		990,002
2020-08-11	2020-08-10	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		483.3400	-1,723	-833		992,520
2020-08-11	2020-08-10	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		481.9000	-1,965	-947		994,243
2020-08-11	2020-08-10	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		481.1500	-2,075	-998		996,208
2020-08-11	2020-08-10	4	Pintoff Scott	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		508.8800	-250	-127		7,839
2020-08-06	2020-08-06	4	Prager Richard Leon By GRAT	MKTX	Common Stock, par value $0.003 per share	G - Gift	I			288			1,288
2020-08-06	2020-08-06	4	Prager Richard Leon	MKTX	Common Stock, par value $0.003 per share	G - Gift	D			-288			238
2020-08-03	2020-07-31	4	Gibson Kourtney	MKTX	Common Stock, par value $0.003 per share	A - Award	D			209			209
2020-07-08	2020-07-06	4	McVey Richard M	MKTX	Stock Option (right to buy)	M - Exercise	D	88.25		-58,582		0
2020-07-08	2020-07-06	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		520.7900	-24,207	-12,607		998,283
2020-07-08	2020-07-06	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		88.2500	58,582	5,170		1,022,490
2020-06-15	2020-06-11	4	Chwick Jane	MKTX	Common Stock, par value $0.003 per share	A - Award	D			238			5,877
2020-06-15	2020-06-11	4	Altobello Nancy A.	MKTX	Common Stock, par value $0.003 per share	A - Award	D			238			606
2020-06-15	2020-06-11	4	Gmelich Justin Gerald	MKTX	Common Stock, par value $0.003 per share	A - Award	D			238			446
2020-06-15	2020-06-11	4	Begleiter Steven L	MKTX	Common Stock, par value $0.003 per share	A - Award	D			238			8,741
2020-06-15	2020-06-11	4	Casper Stephen P	MKTX	Common Stock, par value $0.003 per share	A - Award	D			283			11,850
2020-06-15	2020-06-11	4	Prager Richard Leon	MKTX	Common Stock, par value $0.003 per share	A - Award	D			238			526
2020-06-15	2020-06-11	4	KETCHUM RICHARD G	MKTX	Common Stock, par value $0.003 per share	A - Award	D			238			1,760
2020-06-15	2020-06-11	4	Steinhardt John	MKTX	Common Stock, par value $0.003 per share	A - Award	D			238			22,274
2020-06-15	2020-06-11	4	Cruger William Frank Jr.	MKTX	Common Stock, par value $0.003 per share	A - Award	D			238			5,864
2020-06-15	2020-06-11	4	Portney Emily Hope	MKTX	Common Stock, par value $0.003 per share	A - Award	D			238			1,497
2020-05-15	2020-05-15	4	Begleiter Steven L	MKTX	Common Stock, par value $0.003 per share	G - Gift	D			-150			8,503
2020-05-15	2020-05-14	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		502.3200	-1,305	-656		33,847
2020-05-15	2020-05-14	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		501.4500	-600	-301		35,152
2020-05-15	2020-05-14	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		500.1900	-595	-298		35,752
2020-05-12	2020-05-08	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		482.8400	-1,405	-678		34,192
2020-05-12	2020-05-08	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		479.6600	-314	-151		35,597
2020-05-12	2020-05-08	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		478.8600	-438	-210		35,911
2020-05-12	2020-05-08	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		477.9200	-988	-472		36,349
2020-05-12	2020-05-08	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		476.8500	-855	-408		37,337
2020-05-12	2020-05-08	4	McVey Richard M	MKTX	Stock Option (right to buy)	M - Exercise	D	88.25		-58,000		58,582
2020-05-12	2020-05-08	4	McVey Richard M	MKTX	Stock Option (right to buy)	M - Exercise	D	88.25		-1,133		0
2020-05-12	2020-05-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		490.2200	-1,704	-835		963,908
2020-05-12	2020-05-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		489.2600	-824	-403		965,612
2020-05-12	2020-05-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		488.4000	-1,701	-831		966,436
2020-05-12	2020-05-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		487.2600	-1,498	-730		968,137
2020-05-12	2020-05-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		485.7900	-300	-146		969,635
2020-05-12	2020-05-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		484.6200	-3,199	-1,550		969,935
2020-05-12	2020-05-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		483.8200	-4,542	-2,198		973,134
2020-05-12	2020-05-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		482.7600	-3,302	-1,594		977,676
2020-05-12	2020-05-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		481.7800	-2,200	-1,060		980,978
2020-05-12	2020-05-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		480.6200	-1,000	-481		983,178
2020-05-12	2020-05-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		479.6400	-2,000	-959		984,178
2020-05-12	2020-05-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		478.5200	-800	-383		986,178
2020-05-12	2020-05-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		477.3900	-1,430	-683		986,978
2020-05-12	2020-05-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		476.7200	-500	-238		988,408
2020-05-12	2020-05-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		484.3200	-21,169	-10,253		988,908
2020-05-12	2020-05-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		88.2500	58,000	5,118		1,010,077
2020-05-12	2020-05-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		88.2500	1,133	100		952,077
2020-05-07	2020-05-05	4	Casper Stephen P	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		480.9800	-200	-96		11,567
2020-05-07	2020-05-05	4	Casper Stephen P	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		479.8600	-1,400	-672		11,767
2020-05-07	2020-05-05	4	Casper Stephen P	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		477.8400	-200	-96		13,167
2020-05-07	2020-05-05	4	Casper Stephen P	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		476.5300	-200	-95		13,367
2020-05-07	2020-05-05	4	Pintoff Scott	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		481.1300	-250	-120		8,089
2020-05-05	2020-05-04	4	Roupie Christophe Pierre Daniel	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		457.0000	-1,920	-877		10,914
2020-04-24		3	Pintoff Scott	MKTX	Common Stock, par value $0.003 per share		D						16,678
2020-04-24		3	Pintoff Scott	MKTX	Common Stock, par value $0.003 per share		D						16,678
2020-04-24		3	Pintoff Scott	MKTX	Common Stock, par value $0.003 per share		D						16,678
2020-04-10	2020-04-08	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	G - Gift	D			-259			38,192
2020-04-03	2020-04-01	4	Roupie Christophe Pierre Daniel	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		333.9900	-860	-287		12,834
2020-04-03	2020-04-01	4	Roupie Christophe Pierre Daniel	MKTX	Common Stock, par value $0.003 per share	A - Award	D			1,827			13,694
2020-02-18	2020-02-14	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		342.4200	-3,000	-1,027		78,892
2020-02-18	2020-02-15	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		345.6900	-480	-166		36,347
2020-02-18	2020-02-15	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		345.6900	-438	-151		36,827
2020-02-14	2020-02-13	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		335.5800	-1,300	-436		37,265
2020-02-14	2020-02-13	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		332.8200	-1,200	-399		38,565
2020-02-12	2020-02-10	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		342.2400	-102	-35		950,944
2020-02-12	2020-02-10	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		341.8000	-3,713	-1,269		951,046
2020-02-12	2020-02-10	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		340.6500	-5,649	-1,924		954,759
2020-02-12	2020-02-10	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		339.7600	-3,151	-1,071		960,408
2020-02-12	2020-02-10	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		338.8500	-5,395	-1,828		963,559
2020-02-12	2020-02-10	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		337.6600	-2,103	-710		968,954
2020-02-12	2020-02-10	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		336.6800	-3,677	-1,238		971,057
2020-02-12	2020-02-10	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		335.6700	-1,210	-406		974,734
2020-02-12	2020-02-10	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		342.0100	-4,000	-1,368		38,451
2020-02-04	2020-01-31	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		354.1800	-7	-2		39,765
2020-02-04	2020-01-31	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		354.1800	-104	-37		39,772
2020-02-04	2020-01-31	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		354.1800	-214	-76		39,876
2020-02-04	2020-01-31	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		354.1800	-143	-51		40,090
2020-02-04	2020-01-31	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		354.1800	-175	-62		40,233
2020-02-04	2020-01-31	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		354.1800	-119	-42		40,408
2020-02-04	2020-01-31	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		354.1800	-117	-41		40,527
2020-02-04	2020-01-31	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		354.1800	-1,274	-451		40,644
2020-02-04	2020-01-31	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		354.1800	-1,367	-484		41,918
2020-02-04	2020-01-31	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		354.1800	-9	-3		81,892
2020-02-04	2020-01-31	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		354.1800	-144	-51		81,901
2020-02-04	2020-01-31	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		354.1800	-192	-68		82,045
2020-02-04	2020-01-31	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		354.1800	-147	-52		82,237
2020-02-04	2020-01-31	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		354.1800	-180	-64		82,384
2020-02-04	2020-01-31	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		354.1800	-52	-18		82,564
2020-02-04	2020-01-31	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		354.1800	-103	-36		82,616
2020-02-04	2020-01-31	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		354.1800	-1,769	-627		82,719
2020-02-04	2020-01-31	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		354.1800	-2,358	-835		84,488
2020-02-04	2020-01-31	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		354.1800	-857	-304		975,944
2020-02-04	2020-01-31	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		354.1800	-754	-267		976,801
2020-02-04	2020-01-31	4	Roupie Christophe Pierre Daniel	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		354.1800	-403	-143		11,867
2020-02-04	2020-01-31	4	Roupie Christophe Pierre Daniel	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		354.1800	-94	-33		12,270
2020-02-04	2020-01-31	4	Roupie Christophe Pierre Daniel	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		354.1800	-118	-42		12,364
2020-02-04	2020-01-31	4	Roupie Christophe Pierre Daniel	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		354.1800	-116	-41		12,482
2020-02-04	2020-01-31	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		354.1800	-11	-4		42,451
2020-02-04	2020-01-31	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		354.1800	-173	-61		42,462
2020-02-04	2020-01-31	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		354.1800	-234	-83		42,635
2020-02-04	2020-01-31	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		354.1800	-228	-81		42,869
2020-02-04	2020-01-31	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		354.1800	-226	-80		43,097
2020-02-04	2020-01-31	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		354.1800	-199	-70		43,323
2020-02-04	2020-01-31	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		354.1800	-158	-56		43,522
2020-02-04	2020-01-31	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		354.1800	-2,122	-752		43,680
2020-02-04	2020-01-31	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		354.1800	-2,829	-1,002		45,802
2020-01-29	2020-01-29	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	A - Award	D			830			48,631
2020-01-29	2020-01-29	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	A - Award	D			44			47,801
2020-01-29	2020-01-29	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	A - Award	D			684			86,846
2020-01-29	2020-01-29	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	A - Award	D			37			86,162
2020-01-29	2020-01-29	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	A - Award	D			7,142			977,555
2020-01-29	2020-01-29	4	Roupie Christophe Pierre Daniel	MKTX	Common Stock, par value $0.003 per share	A - Award	D			4,297			12,598
2020-01-29	2020-01-29	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	A - Award	D			761			43,285
2020-01-29	2020-01-29	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	A - Award	D			26			42,524
2020-01-23	2020-01-22	4	CONCANNON CHRISTOPHER R	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		370.4400	-3,844	-1,424		46,096
2020-01-17	2020-01-15	4	McVey Richard M	MKTX	Stock Option (right to buy)	A - Award	D	368.10		9,342		9,342
2020-01-17	2020-01-15	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		368.1000	-3,128	-1,151		970,413
2020-01-17	2020-01-15	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		368.1000	-10,336	-3,805		973,541
2020-01-17	2020-01-15	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		368.1000	-3,527	-1,298		983,877
2020-01-17	2020-01-15	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		368.1000	-4,336	-1,596		987,404
2020-01-17	2020-01-15	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	A - Award	D			2,324			991,740
2020-01-17	2020-01-15	4	Roupie Christophe Pierre Daniel	MKTX	Common Stock, par value $0.003 per share	A - Award	D			434			8,301
2020-01-17	2020-01-15	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	A - Award	D			943			47,757
2020-01-17	2020-01-15	4	CONCANNON CHRISTOPHER R	MKTX	Common Stock, par value $0.003 per share	A - Award	D			3,031			49,940
2020-01-17	2020-01-15	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	A - Award	D			741			42,498
2020-01-17	2020-01-15	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	A - Award	D			808			86,125
2019-12-26	2019-12-23	4	McVey Richard M	MKTX	Stock Option (right to buy)	M - Exercise	D	101.77		-982		0
2019-12-26	2019-12-23	4	McVey Richard M	MKTX	Stock Option (right to buy)	M - Exercise	D	88.25		-2,266		1,133
2019-12-26	2019-12-23	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		101.7700	982	100		989,416
2019-12-26	2019-12-23	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		88.2500	2,266	200		988,434
2019-12-17	2019-12-13	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	G - Gift	D			-40,000			986,168
2019-11-12	2019-11-08	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		349.7200	-1,200	-420		46,814
2019-11-12	2019-11-08	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		348.6000	-1,300	-453		48,014
2019-11-12	2019-11-08	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		347.8700	-1,500	-522		49,314
2019-11-12	2019-11-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		349.8300	-3,647	-1,276		1,026,168
2019-11-12	2019-11-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		349.1900	-6,444	-2,250		1,029,815
2019-11-12	2019-11-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		348.1300	-5,814	-2,024		1,036,259
2019-11-12	2019-11-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		347.1400	-3,722	-1,292		1,042,073
2019-11-12	2019-11-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		346.1300	-373	-129		1,045,795
2019-11-12	2019-11-08	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		349.8900	-904	-316		41,757
2019-11-12	2019-11-08	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		348.5600	-710	-247		42,661
2019-11-12	2019-11-08	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		347.8700	-786	-273		43,371
2019-11-12	2019-11-08	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		346.2600	-100	-35		44,157
2019-11-01	2019-10-31	4	McVey Richard M	MKTX	Stock Option (right to buy)	M - Exercise	D	21.56		-42,000		26,779
2019-11-01	2019-10-31	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		368.5900	-21,821	-8,043		1,046,168
2019-11-01	2019-10-31	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		21.5600	42,000	906		1,067,989
2019-10-17	2019-10-15	4	Gmelich Justin Gerald	MKTX	Common Stock, par value $0.003 per share	A - Award	D			208			208
2019-09-05	2019-09-03	4	Casper Stephen P By family trust	MKTX	Common Stock, par value $0.003 per share	S - Sale	I		402.8201	-1,000	-403		42,808
2019-08-19	2019-08-15	4	Prager Richard Leon By GRAT	MKTX	Common Stock, par value $0.003 per share	P - Purchase	I		358.4900	1,000	358		1,000
2019-08-09	2019-08-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		352.1100	-2,363	-832		1,025,989
2019-08-09	2019-08-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		351.4400	-6,803	-2,391		1,028,352
2019-08-09	2019-08-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		350.5400	-4,732	-1,659		1,035,155
2019-08-09	2019-08-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		349.1000	-702	-245		1,039,887
2019-08-09	2019-08-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		348.3000	-2,500	-871		1,040,589
2019-08-09	2019-08-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		346.8100	-1,160	-402		1,043,089
2019-08-09	2019-08-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		345.7500	-1,740	-602		1,044,249
2019-08-09	2019-08-08	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		349.3600	-330	-115		50,814
2019-08-09	2019-08-08	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		348.4600	-1,120	-390		51,144
2019-08-09	2019-08-08	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		347.1000	-300	-104		52,264
2019-08-09	2019-08-08	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		346.0900	-500	-173		52,564
2019-08-09	2019-08-08	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		345.1400	-500	-173		53,064
2019-08-01	2019-07-30	4	Begleiter Steven L	MKTX	Common Stock, par value $0.003 per share	A - Award	D			324			8,653
2019-08-01	2019-07-30	4	Casper Stephen P	MKTX	Common Stock, par value $0.003 per share	A - Award	D			380			13,567
2019-08-01	2019-07-30	4	Chwick Jane	MKTX	Common Stock, par value $0.003 per share	A - Award	D			324			5,639
2019-08-01	2019-07-30	4	Cruger William Frank Jr.	MKTX	Common Stock, par value $0.003 per share	A - Award	D			324			5,626
2019-08-01	2019-07-30	4	KETCHUM RICHARD G	MKTX	Common Stock, par value $0.003 per share	A - Award	D			324			1,522
2019-08-01	2019-07-30	4	Portney Emily Hope	MKTX	Common Stock, par value $0.003 per share	A - Award	D			324			1,259
2019-08-01	2019-07-30	4	Prager Richard Leon	MKTX	Common Stock, par value $0.003 per share	A - Award	D			288			288
2019-08-01	2019-07-30	4	Steinhardt John	MKTX	Common Stock, par value $0.003 per share	A - Award	D			324			22,036
2019-08-01	2019-07-30	4	McVey Richard M	MKTX	Stock Option (right to buy)	M - Exercise	D	21.56		-42,000		68,779
2019-08-01	2019-07-30	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		336.0500	-21,942	-7,374		1,045,989
2019-08-01	2019-07-30	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		21.5600	42,000	906		1,067,931
2019-08-01	2019-07-30	4	Altobello Nancy A.	MKTX	Common Stock, par value $0.003 per share	A - Award	D			368			368
2019-06-13	2019-06-12	4	CONCANNON CHRISTOPHER R	MKTX	Performance Shares	M - Exercise	D			-9,945		0
2019-06-13	2019-06-12	4	CONCANNON CHRISTOPHER R	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D			9,945			46,909
2019-06-10	2019-06-07	4	Casper Stephen P	MKTX	Stock Option (right to buy)	M - Exercise	D	10.77		-3,187		0
2019-06-10	2019-06-07	4	Casper Stephen P	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		337.3031	-102	-34		13,055
2019-06-10	2019-06-07	4	Casper Stephen P	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		10.7700	3,187	34		13,157
2019-05-23	2019-05-22	4	McVey Richard M	MKTX	Performance Shares	M - Exercise	D			-19,800		0
2019-05-23	2019-05-22	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D			19,800			1,025,931
2019-05-16	2019-05-14	4	McVey Richard M	MKTX	Performance Shares	M - Exercise	D			-17,942		0
2019-05-16	2019-05-14	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D			17,942			1,006,131
2019-05-16	2019-05-14	4	CONCANNON CHRISTOPHER R	MKTX	Performance Shares	M - Exercise	D			-8,969		0
2019-05-16	2019-05-14	4	CONCANNON CHRISTOPHER R	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D			8,969			36,964
2019-05-10	2019-05-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		282.0900	-3,405	-961		988,189
2019-05-10	2019-05-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		281.4700	-10,495	-2,954		991,594
2019-05-10	2019-05-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		280.3500	-4,200	-1,177		1,002,089
2019-05-10	2019-05-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		279.3700	-1,900	-531		1,006,289
2019-05-01	2019-05-01	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		282.5000	-1,000	-282		85,317
2019-05-01	2019-04-30	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		279.0170	-1,000	-279		86,317
2019-05-01	2019-04-29	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		276.2333	-2,000	-552		87,317
2019-04-29	2019-04-26	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		265.6110	-1,489	-395		53,564
2019-02-21	2019-02-21	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	A - Award	D			7,356			44,257
2019-02-21	2019-02-19	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		231.9906	-8,000	-1,856		36,901
2019-02-21	2019-02-21	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	A - Award	D			10,216			89,317
2019-02-21	2019-02-21	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	A - Award	D			12,260			55,053
2019-02-12	2019-02-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		221.7700	-2,689	-596		1,008,189
2019-02-12	2019-02-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		221.0300	-12,762	-2,821		1,010,878
2019-02-12	2019-02-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		220.1800	-4,549	-1,002		1,023,640
2019-02-06	2018-12-12	5	Casper Stephen P By family trust	MKTX	Common Stock, par value $0.003 per share	G - Gift	I			43,808			43,808
2019-02-06	2018-12-12	5	Casper Stephen P	MKTX	Common Stock, par value $0.003 per share	G - Gift	D			-43,808			9,970
2019-02-06	2018-09-19	5	Sullivan James Joseph	MKTX	Common Stock, par value $0.003 per share	G - Gift	D			-320			8,038
2019-02-06	2019-02-05	4	Steinhardt John	MKTX	Stock Option (right to buy)	M - Exercise	D	10.77		-3,187		0
2019-02-06	2019-02-05	4	Steinhardt John	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		215.6200	-3,187	-687		21,712
2019-02-06	2019-02-05	4	Steinhardt John	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		10.7700	3,187	34		24,899
2019-02-06	2019-02-04	4	GOMACH DAVID G	MKTX	Stock Option (right to buy)	M - Exercise	D	10.77		-3,187		0
2019-02-06	2019-02-04	4	GOMACH DAVID G By Trust	MKTX	Common Stock, par value $0.003 per share	S - Sale	I		215.8300	-3,187	-688		19,059
2019-02-06	2019-02-04	4	GOMACH DAVID G By Trust	MKTX	Common Stock, par value $0.003 per share	G - Gift	I			3,187			22,246
2019-02-06	2019-02-04	4	GOMACH DAVID G	MKTX	Common Stock, par value $0.003 per share	G - Gift	D			-3,187			299
2019-02-06	2019-02-04	4	GOMACH DAVID G	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		10.7700	3,187	34		3,486
2019-02-06	2018-11-30	4	GOMACH DAVID G By Trust	MKTX	Common Stock, par value $0.003 per share	G - Gift	I			299			19,059
2019-02-06	2018-11-30	4	GOMACH DAVID G	MKTX	Common Stock, par value $0.003 per share	G - Gift	D			-299			299
2019-02-04	2019-01-31	4	Roupie Christophe Pierre Daniel	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		214.7700	-119	-26		7,867
2019-02-04	2019-01-31	4	Roupie Christophe Pierre Daniel	MKTX	Common Stock, par value $0.003 per share	A - Award	D			3,634			7,986
2019-02-04	2019-01-31	4	Roupie Christophe Pierre Daniel	MKTX	Common Stock, par value $0.003 per share	A - Award	D			498			4,352
2019-02-04	2019-01-31	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		214.7700	-1,268	-272		1,028,189
2019-02-04	2019-01-31	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		214.7700	-1,157	-248		1,029,457
2019-02-04	2019-01-31	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		214.7700	-2,949	-633		1,030,614
2019-02-04	2019-01-31	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	A - Award	D			5,891			1,033,563
2019-02-04	2019-01-31	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		214.7700	-186	-40		79,101
2019-02-04	2019-01-31	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		214.7700	-103	-22		79,287
2019-02-04	2019-01-31	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		214.7700	-52	-11		79,390
2019-02-04	2019-01-31	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	A - Award	D			599			79,442
2019-02-04	2019-01-31	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		214.7700	-125	-27		44,901
2019-02-04	2019-01-31	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		214.7700	-82	-18		45,026
2019-02-04	2019-01-31	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		214.7700	-81	-17		45,108
2019-02-04	2019-01-31	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		214.7700	-12	-3		45,189
2019-02-04	2019-01-31	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		214.7700	-35	-8		45,201
2019-02-04	2019-01-31	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		214.7700	-29	-6		45,236
2019-02-04	2019-01-31	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	A - Award	D			582			45,265
2019-02-04	2019-01-31	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		214.7700	-233	-50		42,793
2019-02-04	2019-01-31	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		214.7700	-158	-34		43,026
2019-02-04	2019-01-31	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		214.7700	-198	-43		43,184
2019-02-04	2019-01-31	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		214.7700	-396	-85		43,382
2019-02-04	2019-01-31	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		214.7700	-127	-27		43,778
2019-02-04	2019-01-31	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		214.7700	-323	-69		43,905
2019-02-04	2019-01-31	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	A - Award	D			930			44,228
2019-01-24	2019-01-22	4	CONCANNON CHRISTOPHER R	MKTX	Performance Shares	A - Award	D			9,945		9,945
2019-01-24	2019-01-22	4	CONCANNON CHRISTOPHER R	MKTX	Performance Shares	A - Award	D			8,969		8,969
2019-01-24	2019-01-22	4	CONCANNON CHRISTOPHER R	MKTX	Employee Stock Option (right to buy	A - Award	D	294.71		41,189		41,189
2019-01-24	2019-01-22	4	CONCANNON CHRISTOPHER R	MKTX	Employee Stock Option (right to buy	A - Award	D	272.88		35,679		35,679
2019-01-24	2019-01-22	4	CONCANNON CHRISTOPHER R	MKTX	Common Stock, par value $0.003 per share	A - Award	D			4,666			27,995
2019-01-24	2019-01-22	4	CONCANNON CHRISTOPHER R	MKTX	Common Stock, par value $0.003 per share	A - Award	D			23,329			23,329
2019-01-17	2019-01-15	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	A - Award	D			1,151			78,843
2019-01-17	2019-01-15	4	Roupie Christophe Pierre Daniel	MKTX	Common Stock, par value $0.003 per share	A - Award	D			3,111			3,854
2019-01-17	2019-01-15	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	A - Award	D			1,402			43,298
2019-01-17	2019-01-15	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		210.8800	-5,263	-1,110		1,027,672
2019-01-17	2019-01-15	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		210.8800	-17,367	-3,662		1,032,935
2019-01-17	2019-01-15	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		210.8800	-5,936	-1,252		1,050,302
2019-01-17	2019-01-15	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		210.8800	-7,555	-1,593		1,056,238
2019-01-17	2019-01-15	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	A - Award	D			7,757			1,063,793
2019-01-17	2018-12-28	4	McVey Richard M By Custodial Account	MKTX	Common Stock, par value $0.003 per share	G - Gift	I			10			10
2019-01-17	2018-12-28	4	McVey Richard M By Immediate Family Member	MKTX	Common Stock, par value $0.003 per share	G - Gift	I			-10			1,990
2019-01-17	2019-01-15	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	A - Award	D			1,287			44,683
2018-12-06	2018-12-04	4	McVey Richard M	MKTX	Employee Stock Option (right to buy)	M - Exercise	D	21.56		-23,190		110,779
2018-12-06	2018-12-04	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	G - Gift	D			-10,000			1,056,036
2018-12-06	2018-12-04	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		21.5600	23,190	500		1,066,036
2018-12-06	2018-12-03	4	McVey Richard M By Immediate Family Member	MKTX	Common Stock, par value $0.003 per share	G - Gift	I			2,000			2,000
2018-12-06	2018-12-03	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	G - Gift	D			-2,000			1,042,846
2018-11-21	2018-11-20	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		216.8918	-2,500	-542		77,692
2018-11-13	2018-11-08	4	McVey Richard M	MKTX	Performance Shares	A - Award	D			19,800		19,800
2018-11-13	2018-11-08	4	McVey Richard M	MKTX	Performance Shares	A - Award	D			17,942		17,942
2018-11-13	2018-11-08	4	McVey Richard M	MKTX	Employee Stock Option (right to buy)	A - Award	D	278.40		79,411		79,411
2018-11-13	2018-11-08	4	McVey Richard M	MKTX	Employee Stock Option (right to buy)	A - Award	D	257.78		69,113		69,113
2018-11-13	2018-11-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		207.9454	-1,601	-333		1,044,846
2018-11-13	2018-11-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		207.2473	-1,400	-290		1,046,447
2018-11-13	2018-11-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		205.9751	-5,340	-1,100		1,047,847
2018-11-13	2018-11-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		205.1444	-5,730	-1,175		1,053,187
2018-11-13	2018-11-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		203.9467	-5,929	-1,209		1,058,917
2018-11-13	2018-11-09	4	Steinhardt John	MKTX	Common Stock, par value $0.003 per share	G - Gift	D			-2,500			21,712
2018-10-31	2018-10-30	4	McVey Richard M	MKTX	Employee Stock Option (right to buy)	M - Exercise	D	21.56		-11,640		133,969
2018-10-31	2018-10-30	4	McVey Richard M	MKTX	Employee Stock Option (right to buy)	M - Exercise	D	21.56		-9,860		145,609
2018-10-31	2018-10-30	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		214.3360	-11,640	-2,495		1,064,846
2018-10-31	2018-10-30	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		21.5600	11,640	251		1,076,486
2018-10-31	2018-10-30	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		21.5600	9,860	213		1,064,846
2018-10-31	2018-10-29	4	McVey Richard M	MKTX	Employee Stock Option (right to buy)	M - Exercise	D	21.56		-12,202		155,469
2018-10-31	2018-10-29	4	McVey Richard M	MKTX	Employee Stock Option (right to buy)	M - Exercise	D	21.56		-10,298		167,671
2018-10-31	2018-10-29	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		209.6289	-12,202	-2,558		1,054,986
2018-10-31	2018-10-29	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		21.5600	12,202	263		1,067,188
2018-10-31	2018-10-29	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		21.5600	10,298	222		1,054,986
2018-08-16	2018-08-14	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		187.0071	-1,437	-269		41,896
2018-08-16	2018-08-14	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		186.4459	-11,394	-2,124		43,333
2018-08-10	2018-08-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		188.8869	-163	-31		1,044,688
2018-08-10	2018-08-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		188.3339	-3,289	-619		1,044,851
2018-08-10	2018-08-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		186.8207	-4,191	-783		1,048,140
2018-08-10	2018-08-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		186.1948	-12,357	-2,301		1,052,331
2018-08-10	2018-08-08	4	GOMACH DAVID G	MKTX	Common Stock, par value $0.003 per share	A - Award	D			598			598
2018-08-10	2018-05-31	4	GOMACH DAVID G By Trust	MKTX	Common Stock, par value $0.003 per share	G - Gift	I			259			18,760
2018-08-10	2018-05-31	4	GOMACH DAVID G	MKTX	Common Stock, par value $0.003 per share	G - Gift	D			-259			0
2018-08-10	2018-08-08	4	Chwick Jane	MKTX	Common Stock, par value $0.003 per share	A - Award	D			598			5,315
2018-08-10	2018-08-08	4	Casper Stephen P	MKTX	Common Stock, par value $0.003 per share	A - Award	D			702			53,778
2018-08-10	2018-08-08	4	Cruger William Frank Jr.	MKTX	Common Stock, par value $0.003 per share	A - Award	D			598			5,302
2018-08-10	2018-08-08	4	HERNANDEZ CARLOS MAURICIO	MKTX	Common Stock, par value $0.003 per share	A - Award	D			598			20,479
2018-08-10	2018-08-08	4	KETCHUM RICHARD G	MKTX	Common Stock, par value $0.003 per share	A - Award	D			598			1,198
2018-08-10	2018-08-08	4	Portney Emily Hope	MKTX	Common Stock, par value $0.003 per share	A - Award	D			598			935
2018-08-10	2018-08-08	4	Steinhardt John	MKTX	Common Stock, par value $0.003 per share	A - Award	D			598			24,212
2018-08-10	2018-08-08	4	Sullivan James Joseph	MKTX	Common Stock, par value $0.003 per share	A - Award	D			598			8,358
2018-08-10	2018-08-08	4	Begleiter Steven L	MKTX	Common Stock, par value $0.003 per share	A - Award	D			598			8,329
2018-08-07	2018-08-06	4	McVey Richard M	MKTX	Employee Stock Option (right to buy)	M - Exercise	D	21.56		-12,055		177,969
2018-08-07	2018-08-06	4	McVey Richard M	MKTX	Employee Stock Option (right to buy)	M - Exercise	D	21.56		-9,945		190,024
2018-08-07	2018-08-06	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		189.0328	-12,055	-2,279		1,064,688
2018-08-07	2018-08-06	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		21.5600	12,055	260		1,076,743
2018-08-07	2018-08-06	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		21.5600	9,945	214		1,064,688
2018-08-07	2018-08-03	4	McVey Richard M	MKTX	Employee Stock Option (right to buy)	M - Exercise	D	21.56		-10,959		199,969
2018-08-07	2018-08-03	4	McVey Richard M	MKTX	Employee Stock Option (right to buy)	M - Exercise	D	21.56		-9,041		210,928
2018-08-07	2018-08-03	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		189.3075	-10,959	-2,075		1,054,743
2018-08-07	2018-08-03	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		21.5600	10,959	236		1,065,702
2018-08-07	2018-08-03	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		21.5600	9,041	195		1,054,743
2018-05-22	2018-05-18	4	GOMACH DAVID G By Trust	MKTX	Common Stock, par value $0.003 per share	S - Sale	I		205.5778	-700	-144		18,501
2018-05-22	2018-05-18	4	GOMACH DAVID G By Trust	MKTX	Common Stock, par value $0.003 per share	S - Sale	I		204.5388	-800	-164		19,201
2018-05-22	2018-05-18	4	GOMACH DAVID G By Trust	MKTX	Common Stock, par value $0.003 per share	S - Sale	I		203.5430	-500	-102		20,001
2018-05-22	2018-05-18	4	GOMACH DAVID G By Trust	MKTX	Common Stock, par value $0.003 per share	S - Sale	I		202.1845	-553	-112		20,501
2018-05-22	2018-05-18	4	GOMACH DAVID G By Trust	MKTX	Common Stock, par value $0.003 per share	S - Sale	I		205.6837	-2,401	-494		21,054
2018-05-22	2018-05-18	4	GOMACH DAVID G By Trust	MKTX	Common Stock, par value $0.003 per share	S - Sale	I		204.9481	-2,599	-533		23,455
2018-05-10	2018-05-09	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		206.0317	-874	-180		1,045,702
2018-05-10	2018-05-09	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		204.3307	-1,002	-205		1,046,576
2018-05-10	2018-05-09	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		203.4232	-10,032	-2,041		1,047,578
2018-05-10	2018-05-09	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		202.4193	-4,937	-999		1,057,610
2018-05-10	2018-05-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		204.5618	-1,100	-225		1,062,547
2018-05-10	2018-05-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		203.8239	-3,797	-774		1,063,647
2018-05-10	2018-05-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		203.0176	-10,758	-2,184		1,067,444
2018-05-10	2018-05-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		201.9370	-2,500	-505		1,078,202
2018-03-16	2018-03-15	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		223.4296	-2,500	-559		80,192
2018-03-12	2018-03-09	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		219.4248	-1,311	-288		54,727
2018-03-12	2018-03-09	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		218.9007	-990	-217		56,038
2018-03-12	2018-03-09	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		218.1638	-899	-196		57,028
2018-03-12	2018-03-09	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		216.9509	-2,200	-477		57,927
2018-02-22	2018-02-21	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		200.5002	-2,300	-461		43,396
2018-02-22	2018-02-20	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		200.7419	-5,700	-1,144		45,696
2018-02-20	2018-02-15	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		198.9000	-7,555	-1,503		1,080,702
2018-02-09	2018-02-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		195.1013	-800	-156		1,088,257
2018-02-09	2018-02-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		193.8548	-513	-99		1,089,057
2018-02-09	2018-02-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		192.9040	-4,974	-960		1,089,570
2018-02-09	2018-02-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		191.9937	-1,115	-214		1,094,544
2018-02-09	2018-02-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		190.8771	-7,068	-1,349		1,095,659
2018-02-09	2018-02-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		189.9750	-13,040	-2,477		1,102,727
2018-02-09	2018-02-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		189.0251	-7,490	-1,416		1,115,767
2018-02-06	2018-02-05	4	GOMACH DAVID G	MKTX	Stock Option (right to buy)	M - Exercise	D	9.72		-4,225		0
2018-02-06	2018-02-05	4	GOMACH DAVID G By Trust	MKTX	Common Stock, par value $0.003 per share	S - Sale	I		198.3368	-523	-104		26,054
2018-02-06	2018-02-05	4	GOMACH DAVID G By Trust	MKTX	Common Stock, par value $0.003 per share	S - Sale	I		197.9340	-3,702	-733		26,577
2018-02-06	2018-02-05	4	GOMACH DAVID G By Trust	MKTX	Common Stock, par value $0.003 per share	M - Exercise	I		9.7200	4,225	41		30,279
2018-02-06	2017-11-30	4	GOMACH DAVID G By Trust	MKTX	Common Stock, par value $0.003 per share	G - Gift	I			259			26,054
2018-02-06	2017-11-30	4	GOMACH DAVID G	MKTX	Common Stock, par value $0.003 per share	G - Gift	D			-259			259
2018-02-02	2018-01-31	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	A - Award	D			481			51,396
2018-02-02	2018-01-31	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		196.2100	-35	-7		50,915
2018-02-02	2018-01-31	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		196.2100	-83	-16		50,950
2018-02-02	2018-01-31	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		196.2100	-11	-2		51,033
2018-02-02	2018-01-31	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		196.2100	-28	-5		51,044
2018-02-02	2018-01-31	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		196.2100	-82	-16		51,072
2018-02-02	2018-01-31	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		196.2100	-253	-50		51,154
2018-02-02	2018-01-31	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	A - Award	D			5,177			1,123,257
2018-02-02	2018-01-31	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		196.2100	-1,156	-227		1,118,080
2018-02-02	2018-01-31	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		196.2100	-1,318	-259		1,119,236
2018-02-02	2018-01-31	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		196.2100	-2,949	-579		1,120,554
2018-02-02	2018-01-31	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		196.2100	-4,095	-803		1,123,503
2018-02-02	2018-01-31	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	A - Award	D			212			82,692
2018-02-02	2018-01-31	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		196.2100	-105	-21		82,480
2018-02-02	2018-01-31	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		196.2100	-745	-146		82,585
2018-02-02	2018-01-31	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		196.2100	-196	-38		83,330
2018-02-02	2018-01-31	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		196.2100	-608	-119		83,526
2018-02-02	2018-01-31	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	A - Award	D			809			60,127
2018-02-02	2018-01-31	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		196.2100	-162	-32		59,318
2018-02-02	2018-01-31	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		196.2100	-396	-78		59,480
2018-02-02	2018-01-31	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		196.2100	-1,340	-263		59,876
2018-02-02	2018-01-31	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		196.2100	-127	-25		61,216
2018-02-02	2018-01-31	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		196.2100	-323	-63		61,343
2018-02-02	2018-01-31	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		196.2100	-352	-69		61,666
2018-02-02	2018-01-31	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		196.2100	-1,094	-215		62,018
2018-01-17	2018-01-15	4	Roupie Christophe Pierre Daniel	MKTX	Common Stock, par value $0.003 per share	A - Award	D			743			743
2018-01-17	2018-01-15	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	A - Award	D			1,081			51,407
2018-01-17	2018-01-15	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	A - Award	D			1,395			63,112
2018-01-17	2018-01-15	4	McVey Richard M	MKTX	Employee Stock Option (right to buy)	A - Award	D	203.72		16,037		16,037
2018-01-17	2018-01-15	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	A - Award	D			4,418			1,127,598
2018-01-17	2018-01-15	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	A - Award	D			1,113			84,134
2018-01-17	2018-01-15	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		203.7200	-2,908	-592		83,021
2017-12-19	2017-12-15	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	G - Gift	D			-10,000			1,123,180
2017-12-01	2017-11-28	4	McVey Richard M	MKTX	Employee Stock Option (right to buy)	M - Exercise	D	10.93		-110,965		0
2017-12-01	2017-11-28	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		193.4300	-60,261	-11,656		1,133,180
2017-12-01	2017-11-28	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		10.9300	110,965	1,213		1,193,441
2017-11-30	2017-11-29	4	Casper Stephen P	MKTX	Stock Option (right to buy)	M - Exercise	D	9.72		-4,225		0
2017-11-30	2017-11-29	4	Casper Stephen P	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		195.8411	-2,000	-392		53,076
2017-11-30	2017-11-29	4	Casper Stephen P	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		9.7200	4,225	41		55,076
2017-11-27	2017-11-20	4	Sullivan James Joseph	MKTX	Common Stock, par value $0.003 per share	G - Gift	D			-50			7,760
2017-11-17	2017-11-16	4	McPherson Kevin M	MKTX	Employee Stock Option (right to buy)	M - Exercise	D	10.93		-5,000		0
2017-11-17	2017-11-16	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		176.6114	-5,000	-883		85,929
2017-11-17	2017-11-16	4	McPherson Kevin M	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		10.9300	5,000	55		90,929
2017-11-15	2017-11-14	4	Steinhardt John	MKTX	Stock Option (right to buy)	M - Exercise	D	9.72		-4,225		0
2017-11-15	2017-11-14	4	Steinhardt John	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		173.9969	-4,225	-735		23,614
2017-11-15	2017-11-14	4	Steinhardt John	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		9.7200	4,225	41		27,839
2017-11-13	2017-11-09	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	G - Gift	D			-250			50,326
2017-11-09	2017-11-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		180.3125	-400	-72		1,082,476
2017-11-09	2017-11-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		179.1807	-3,585	-642		1,082,876
2017-11-09	2017-11-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		178.5998	-22,615	-4,039		1,086,461
2017-11-09	2017-11-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		177.5366	-4,000	-710		1,109,076
2017-11-09	2017-11-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		176.4604	-4,400	-776		1,113,076
2017-11-03	2017-11-02	4	Themelis Nicholas	MKTX	Employee Stock Option (right to buy)	M - Exercise	D	10.93		-4,000		0
2017-11-03	2017-11-02	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		176.4020	-4,000	-706		61,717
2017-11-03	2017-11-02	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		10.9300	4,000	44		65,717
2017-11-02	2017-11-01	4	Portney Emily Hope	MKTX	Common Stock, par value $0.003 per share	A - Award	D			337			337
2017-10-31	2017-10-30	4	McVey Richard M	MKTX	Employee Stock Option (right to buy)	M - Exercise	D	10.93		-50,000		110,965
2017-10-31	2017-10-30	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		173.0500	-27,314	-4,727		1,117,476
2017-10-31	2017-10-30	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		10.9300	50,000	546		1,144,790
2017-10-30	2017-10-30	4	Sullivan James Joseph	MKTX	Common Stock, par value $0.003 per share	G - Gift	D			-100			7,810
2017-08-14	2017-08-10	4	Chwick Jane	MKTX	Common Stock, par value $0.003 per share	A - Award	D			518			4,717
2017-08-14	2017-08-10	4	Begleiter Steven L	MKTX	Common Stock, par value $0.003 per share	A - Award	D			518			7,731
2017-08-14	2017-08-10	4	KETCHUM RICHARD G	MKTX	Common Stock, par value $0.003 per share	A - Award	D			600			600
2017-08-14	2017-08-10	4	Steinhardt John	MKTX	Common Stock, par value $0.003 per share	A - Award	D			518			23,614
2017-08-14	2017-08-10	4	Casper Stephen P	MKTX	Common Stock, par value $0.003 per share	A - Award	D			617			50,851
2017-08-14	2017-08-10	4	Cruger William Frank Jr.	MKTX	Common Stock, par value $0.003 per share	A - Award	D			518			4,704
2017-08-14	2017-08-10	4	HERNANDEZ CARLOS MAURICIO	MKTX	Common Stock, par value $0.003 per share	A - Award	D			518			19,881
2017-08-14	2017-08-10	4	GOMACH DAVID G	MKTX	Common Stock, par value $0.003 per share	A - Award	D			518			518
2017-08-14	2017-05-31	4	GOMACH DAVID G By Trust	MKTX	Common Stock, par value $0.003 per share	G - Gift	I			318			25,795
2017-08-14	2017-05-31	4	GOMACH DAVID G	MKTX	Common Stock, par value $0.003 per share	G - Gift	D			-318			0
2017-08-14	2017-08-10	4	Sullivan James Joseph	MKTX	Common Stock, par value $0.003 per share	A - Award	D			518			7,910
2017-08-10	2017-08-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		203.1600	-200	-41		1,094,790
2017-08-10	2017-08-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		200.0705	-3,917	-784		1,094,990
2017-08-10	2017-08-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		199.5258	-5,280	-1,053		1,098,907
2017-08-10	2017-08-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		198.0126	-3,955	-783		1,104,187
2017-08-10	2017-08-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		197.2864	-6,648	-1,312		1,108,142
2017-08-01	2017-07-31	4	McVey Richard M	MKTX	Employee Stock Option (right to buy)	M - Exercise	D	10.93		-76,035		160,965
2017-08-01	2017-07-31	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		202.8900	-27,089	-5,496		1,114,790
2017-08-01	2017-07-31	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		10.9300	76,035	831		1,141,879
2017-08-01	2017-08-01	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	G - Gift	D			-450			61,717
2017-06-12	2017-06-12	4	McPherson Kevin M	MKTX	Employee Stock Option (right to buy)	M - Exercise	D	10.93		-4,286		5,000
2017-06-12	2017-06-12	4	McPherson Kevin M	MKTX	Common Stock	S - Sale	D		204.3414	-207	-42		85,929
2017-06-12	2017-06-12	4	McPherson Kevin M	MKTX	Common Stock	S - Sale	D		203.1291	-3,053	-620		86,136
2017-06-12	2017-06-12	4	McPherson Kevin M	MKTX	Common Stock	S - Sale	D		202.1782	-1,026	-207		89,189
2017-06-12	2017-06-12	4	McPherson Kevin M	MKTX	Common Stock	M - Exercise	D		10.9300	4,286	47		90,215
2017-06-12	2017-06-08	4	McPherson Kevin M	MKTX	Employee Stock Option (right to buy)	M - Exercise	D	10.93		-5,000		9,286
2017-06-12	2017-06-08	4	McPherson Kevin M	MKTX	Common Stock	S - Sale	D		201.4429	-700	-141		85,929
2017-06-12	2017-06-08	4	McPherson Kevin M	MKTX	Common Stock	S - Sale	D		200.2698	-1,805	-361		86,629
2017-06-12	2017-06-08	4	McPherson Kevin M	MKTX	Common Stock	S - Sale	D		199.3407	-2,495	-497		88,434
2017-06-12	2017-06-08	4	McPherson Kevin M	MKTX	Common Stock	M - Exercise	D		10.9300	5,000	55		90,929
2017-06-12	2017-06-09	4	Themelis Nicholas	MKTX	Employee Stock Option (right to buy)	M - Exercise	D	10.93		-5,596		4,000
2017-06-12	2017-06-09	4	Themelis Nicholas	MKTX	Common Stock	S - Sale	D		202.0100	-500	-101		62,167
2017-06-12	2017-06-09	4	Themelis Nicholas	MKTX	Common Stock	S - Sale	D		201.0065	-2,310	-464		62,667
2017-06-12	2017-06-09	4	Themelis Nicholas	MKTX	Common Stock	S - Sale	D		200.4992	-2,786	-559		64,977
2017-06-12	2017-06-09	4	Themelis Nicholas	MKTX	Common Stock	M - Exercise	D		10.9300	5,596	61		67,763
2017-05-18	2017-05-17	4	Casper Stephen P	MKTX	Employee Stock Option (right to buy)	M - Exercise	D	16.99		-2,500		0
2017-05-18	2017-05-17	4	Casper Stephen P	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		184.7000	-230	-42		50,234
2017-05-18	2017-05-17	4	Casper Stephen P	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		16.9900	2,500	42		50,464
2017-05-09	2017-05-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		186.5503	-4,353	-812		1,065,844
2017-05-09	2017-05-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		185.8737	-9,973	-1,854		1,070,197
2017-05-09	2017-05-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		184.7282	-5,674	-1,048		1,080,170
2017-05-03	2017-05-02	4	McVey Richard M	MKTX	Employee Stock Option (right to buy)	M - Exercise	D	10.93		-30,000		237,000
2017-05-03	2017-05-02	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		189.2625	-7,000	-1,325		1,085,844
2017-05-03	2017-05-02	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		10.9300	30,000	328		1,092,844
2017-05-03	2017-05-01	4	McVey Richard M	MKTX	Employee Stock Option (right to buy)	M - Exercise	D	10.93		-20,000		267,000
2017-05-03	2017-05-01	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		192.1216	-10,000	-1,921		1,062,844
2017-05-03	2017-05-01	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		191.6380	-10,000	-1,916		1,072,844
2017-05-03	2017-05-01	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		10.9300	20,000	219		1,082,844
2017-04-28		3	McPherson Kevin M	MKTX	Common Stock		D						171,858
2017-04-28		3	McPherson Kevin M	MKTX	Common Stock		D						171,858
2017-03-10	2016-08-03	4/A	Casper Stephen P	MKTX	Common Stock, par value $0.003 per share	A - Award	D			763			49,264
2017-02-14	2017-02-13	4	Hersch Ronald M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		189.0070	-12,000	-2,268		34,981
2017-02-14	2017-02-13	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		189.5720	-8,000	-1,517		50,576
2017-02-10	2017-02-09	4	Themelis Nicholas	MKTX	Employee Stock Option (Right to Buy)	M - Exercise	D	10.93		-10,468		9,596
2017-02-10	2017-02-09	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		189.0652	-2,606	-493		62,167
2017-02-10	2017-02-09	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		188.1689	-5,560	-1,046		64,773
2017-02-10	2017-02-09	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		187.2887	-2,302	-431		70,333
2017-02-10	2017-02-09	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		10.9300	10,468	114		72,635
2017-02-09	2017-02-09	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		188.6890	-787	-148		1,062,844
2017-02-09	2017-02-09	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		187.7300	-8,900	-1,671		1,063,631
2017-02-09	2017-02-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		187.5460	-506	-95		1,072,531
2017-02-09	2017-02-07	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		189.7142	-8,636	-1,638		1,073,037
2017-02-08	2017-02-07	4	GOMACH DAVID G	MKTX	Employee Stock Option (right to buy)	M - Exercise	D	16.99		-2,500		0
2017-02-08	2017-02-07	4	GOMACH DAVID G By Trust	MKTX	Common Stock, par value $0.003 per share	S - Sale	I		189.9840	-2,870	-545		25,477
2017-02-08	2017-02-07	4	GOMACH DAVID G By Trust	MKTX	Common Stock, par value $0.003 per share	S - Sale	I		189.9856	-2,500	-475		28,347
2017-02-08	2017-02-07	4	GOMACH DAVID G By Trust	MKTX	Common Stock, par value $0.003 per share	G - Gift	I			2,500			30,847
2017-02-08	2017-02-07	4	GOMACH DAVID G	MKTX	Common Stock, par value $0.003 per share	G - Gift	D			-2,500			318
2017-02-08	2017-02-07	4	GOMACH DAVID G	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		16.9900	2,500	42		2,818
2017-02-08	2017-02-07	4	Steinhardt John	MKTX	Employee Stock Option (right to buy)	M - Exercise	D	16.99		-2,500		0
2017-02-08	2017-02-07	4	Steinhardt John	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		190.0400	-2,500	-475		23,096
2017-02-08	2017-02-07	4	Steinhardt John	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		16.9900	2,500	42		25,596
2017-02-02	2017-01-31	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		187.2500	-39	-7		58,576
2017-02-02	2017-01-31	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		187.2500	-89	-17		58,615
2017-02-02	2017-01-31	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		187.2500	-276	-52		58,704
2017-02-02	2017-01-31	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		187.2500	-257	-48		58,980
2017-02-02	2017-01-31	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		187.2500	-1,388	-260		1,081,673
2017-02-02	2017-01-31	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		187.2500	-4,312	-807		1,083,061
2017-02-02	2017-01-31	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		187.2500	-3,813	-714		1,087,373
2017-02-02	2017-01-31	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		187.2500	-429	-80		62,167
2017-02-02	2017-01-31	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		187.2500	-1,411	-264		62,596
2017-02-02	2017-01-31	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		187.2500	-371	-69		64,007
2017-02-02	2017-01-31	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		187.2500	-1,152	-216		64,378
2017-02-02	2017-01-31	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		187.2500	-1,375	-257		65,530
2017-02-02	2017-01-31	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		187.2500	-954	-179		66,905
2017-01-27	2017-01-25	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	A - Award	D			230			59,237
2017-01-27	2017-01-25	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	A - Award	D			16,765			1,091,186
2017-01-27	2017-01-25	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	A - Award	D			1,833			67,859
2017-01-18	2017-01-15	4	DELISE ANTONIO L	MKTX	Employee Stock Option (right to buy)	A - Award	D	156.85		2,821		2,821
2017-01-18	2017-01-15	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	A - Award	D			716			59,007
2017-01-18	2017-01-15	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		156.8500	-1,203	-189		58,291
2017-01-18	2017-01-15	4	McVey Richard M	MKTX	Employee Stock Option (right to buy)	A - Award	D	156.85		24,515		24,515
2017-01-18	2017-01-15	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	A - Award	D			6,222			1,074,421
2017-01-18	2017-01-15	4	Themelis Nicholas	MKTX	Employee Stock Option (right to buy)	A - Award	D	156.85		3,830		3,830
2017-01-18	2017-01-15	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	A - Award	D			972			66,026
2017-01-13	2017-01-12	4	Hersch Ronald M	MKTX	Employee Stock Option (right to buy)	M - Exercise	D	10.77		-3,187		0
2017-01-13	2017-01-12	4	Hersch Ronald M	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		10.7700	3,187	34		46,981
2017-01-09	2016-11-30	5	GOMACH DAVID G By Trust	MKTX	Common Stock, par value $0.003 per share	G - Gift	I			318			28,347
2017-01-09	2016-11-30	5	GOMACH DAVID G	MKTX	Common Stock, par value $0.003 per share	G - Gift	D			-318			318
2017-01-09	2017-01-06	4	Hersch Ronald M	MKTX	Non-Qualified Stock Option (right to buy)	M - Exercise	D	9.72		-4,225		0
2017-01-09	2017-01-06	4	Hersch Ronald M	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		9.7200	4,225	41		43,794
2016-12-29	2016-12-29	4	Casper Stephen P	MKTX	Common Stock, par value $0.003 per share	G - Gift	D			-1,300			47,868
2016-12-14	2016-12-12	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	G - Gift	D			-20,000			1,068,199
2016-11-22	2016-11-21	4	Steinhardt John	MKTX	Common Stock, par value $0.003 per share	G - Gift	D			-7,928			23,096
2016-10-31	2016-10-28	4	Hersch Ronald M	MKTX	Employee Stock Option (right to buy)	M - Exercise	D	16.99		-1,250		0
2016-10-31	2016-10-28	4	Hersch Ronald M	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		16.9900	1,250	21		39,569
2016-10-19	2016-10-17	4	Hersch Ronald M	MKTX	Employee Stock Option (right to buy)	M - Exercise	D	16.99		-1,250		1,250
2016-10-19	2016-10-17	4	Hersch Ronald M	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		16.9900	1,250	21		38,319
2016-10-19	2016-10-14	4	Hersch Ronald M	MKTX	Common Stock, par value $0.003 per share	G - Gift	D			-200			37,069
2016-08-23	2016-08-23	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		165.4000	-5,745	-950		65,054
2016-08-23	2016-08-22	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		165.4600	-455	-75		70,799
2016-08-22	2016-08-19	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		166.7900	-10,000	-1,668		59,494
2016-08-09	2016-08-03	4	GOMACH DAVID G	MKTX	Common Stock, par value $0.003 per share	A - Award	D			636			636
2016-08-09	2016-05-31	4	GOMACH DAVID G By Trust	MKTX	Common Stock, par value $0.003 per share	G - Gift	I			486			28,029
2016-08-09	2016-05-31	4	GOMACH DAVID G	MKTX	Common Stock, par value $0.003 per share	G - Gift	D			-486			0
2016-08-09	2016-08-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		162.8406	-3,258	-531		1,088,199
2016-08-09	2016-08-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		162.2729	-26,742	-4,340		1,091,457
2016-08-09	2016-08-03	4	Casper Stephen P	MKTX	Common Stock, par value $0.003 per share	A - Award	D			667			49,168
2016-08-09	2016-08-03	4	Steinhardt John	MKTX	Common Stock, par value $0.003 per share	A - Award	D			636			31,024
2016-08-09	2016-08-03	4	Hersch Ronald M	MKTX	Common Stock, par value $0.003 per share	A - Award	D			636			37,269
2016-08-09	2016-08-03	4	HERNANDEZ CARLOS MAURICIO	MKTX	Common Stock, par value $0.003 per share	A - Award	D			636			19,363
2016-08-09	2016-08-03	4	Begleiter Steven L	MKTX	Common Stock, par value $0.003 per share	A - Award	D			636			7,213
2016-08-09	2016-08-03	4	Sullivan James Joseph	MKTX	Common Stock, par value $0.003 per share	A - Award	D			636			7,392
2016-08-09	2016-08-03	4	Chwick Jane	MKTX	Common Stock, par value $0.003 per share	A - Award	D			636			4,199
2016-08-09	2016-08-03	4	Cruger William Frank Jr.	MKTX	Common Stock, par value $0.003 per share	A - Award	D			636			4,186
2016-06-16	2016-06-15	4	Begleiter Steven L	MKTX	Common Stock, par value $0.003 per share	G - Gift	D			-179			6,577
2016-05-25	2016-05-24	4	GOMACH DAVID G By Trust	MKTX	Common Stock, par value $0.003 per share	S - Sale	I		139.5400	-600	-84		27,543
2016-05-25	2016-05-24	4	GOMACH DAVID G By Trust	MKTX	Common Stock, par value $0.003 per share	S - Sale	I		138.9600	-4,323	-601		28,143
2016-05-11	2016-05-11	4	McVey Richard M	MKTX	Employee Stock Option (right to buy)	M - Exercise	D	12.96		-63,565		0
2016-05-11	2016-05-11	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		128.7010	-500	-64		1,118,199
2016-05-11	2016-05-11	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		127.7257	-13,400	-1,712		1,118,699
2016-05-11	2016-05-11	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		127.2449	-11,100	-1,412		1,132,099
2016-05-11	2016-05-11	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		12.9600	63,565	824		1,143,199
2016-05-11	2016-05-10	4	McVey Richard M	MKTX	Employee Stock Option (right to buy)	M - Exercise	D	12.96		-25,975		63,565
2016-05-11	2016-05-10	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		127.5477	-1,159	-148		1,079,634
2016-05-11	2016-05-10	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		126.7351	-23,841	-3,021		1,080,793
2016-05-11	2016-05-10	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		12.9600	25,975	337		1,104,634
2016-05-11	2016-05-09	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		127.9719	-6,411	-820		1,078,659
2016-05-11	2016-05-09	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		127.3672	-18,122	-2,308		1,085,070
2016-05-11	2016-05-09	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		126.3005	-5,467	-690		1,103,192
2016-05-11	2016-05-09	4	Casper Stephen P	MKTX	Employee Stock Option (right to buy)	M - Exercise	D	9.30		-5,000		0
2016-05-11	2016-05-09	4	Casper Stephen P	MKTX	Common Stock, par value $0.003	S - Sale	D		127.6893	-365	-47		48,501
2016-05-11	2016-05-09	4	Casper Stephen P	MKTX	Common Stock, par value $0.003	M - Exercise	D		9.3000	5,000	46		48,866
2016-05-05	2016-05-04	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	G - Gift	D			-825			71,254
2016-05-02	2016-04-29	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	G - Gift	D			-102			72,079
2016-03-11	2016-03-09	4	McVey Richard M	MKTX	Performance Shares	M - Exercise	D			-24,240		0
2016-03-11	2016-03-09	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D			24,240			1,108,659
2016-03-03	2016-03-01	4	Steinhardt John	MKTX	Employee Stock Option (right to buy)	M - Exercise	D	9.30		-5,000		0
2016-03-03	2016-03-01	4	Steinhardt John	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		9.3000	5,000	46		30,388
2016-02-18	2016-02-16	4	DELISE ANTONIO L	MKTX	Employee Stock Option (right to buy)	M - Exercise	D	9.95		-27,000		0
2016-02-18	2016-02-16	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		111.5560	-594	-66		69,494
2016-02-18	2016-02-16	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		110.6570	-4,911	-543		70,088
2016-02-18	2016-02-16	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		110.7900	-1,541	-171		74,999
2016-02-18	2016-02-16	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		9.9500	27,000	269		76,540
2016-02-18	2016-02-16	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		111.7300	-3,200	-358		49,540
2016-02-18	2016-02-16	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		110.6000	-6,800	-752		52,740
2016-02-09	2016-02-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		105.4173	-2,751	-290		1,084,419
2016-02-09	2016-02-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		104.5314	-11,292	-1,180		1,087,170
2016-02-09	2016-02-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		103.7560	-15,957	-1,656		1,098,462
2016-02-08	2016-02-05	4	GOMACH DAVID G By Trust	MKTX	Common Stock, par value $0.003 per share	S - Sale	I		110.3600	-100	-11		30,376
2016-02-08	2016-02-05	4	GOMACH DAVID G By Trust	MKTX	Common Stock, par value $0.003 per share	S - Sale	I		109.0233	-300	-33		30,476
2016-02-08	2016-02-05	4	GOMACH DAVID G By Trust	MKTX	Common Stock, par value $0.003 per share	S - Sale	I		108.1701	-500	-54		30,776
2016-02-08	2016-02-05	4	GOMACH DAVID G By Trust	MKTX	Common Stock, par value $0.003 per share	S - Sale	I		106.9905	-1,600	-171		31,276
2016-02-08	2016-02-05	4	Hersch Ronald M	MKTX	Employee Stock Option (right to buy)	M - Exercise	D	9.30		-5,000		0
2016-02-08	2016-02-05	4	Hersch Ronald M	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		9.3000	5,000	46		36,633
2016-02-04	2016-02-03	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		113.7726	-5,183	-590		72,181
2016-02-04	2016-02-03	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		113.7500	-5,500	-626		77,364
2016-02-02	2016-01-31	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		116.2300	-1,454	-169		82,864
2016-02-02	2016-01-31	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		116.2300	-1,375	-160		84,318
2016-02-02	2016-01-31	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		116.2300	-954	-111		85,693
2016-02-02	2016-01-29	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	A - Award	D			5,900			86,647
2016-02-02	2016-01-31	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		116.2300	-3,812	-443		1,114,419
2016-02-02	2016-01-29	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	A - Award	D			22,102			1,118,231
2016-02-02	2016-01-31	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		116.2300	-257	-30		59,540
2016-02-02	2016-01-29	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	A - Award	D			1,967			59,797
2016-01-25	2016-01-22	4	Themelis Nicholas	MKTX	Employee Stock Option (right to buy)	A - Award	D	103.30		26,865		26,865
2016-01-25	2016-01-22	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	A - Award	D			8,666			80,747
2016-01-25	2016-01-22	4	DELISE ANTONIO L	MKTX	Employee Stock Option (right to buy)	A - Award	D	103.30		16,120		16,120
2016-01-25	2016-01-22	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	A - Award	D			5,200			57,830
2016-01-20	2016-01-15	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	A - Award	D			2,446			72,081
2016-01-20	2016-01-15	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		101.7700	-1,924	-196		69,635
2016-01-20	2016-01-15	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		101.7700	-2,183	-222		71,559
2016-01-20	2016-01-15	4	McVey Richard M	MKTX	Employee Stock Option (right to buy)	A - Award	D	101.77		28,002		28,002
2016-01-20	2016-01-15	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	A - Award	D			9,033			1,096,129
2016-01-20	2016-01-15	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		101.7700	-6,731	-685		1,087,096
2016-01-20	2016-01-15	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	A - Award	D			306			52,630
2016-01-20	2016-01-15	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		101.7700	-493	-50		52,324
2016-01-20	2016-01-15	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		101.7700	-559	-57		52,817
2016-01-20	2016-01-15	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		101.7700	-1,203	-122		53,376
2015-12-29	2015-12-28	4	DELISE ANTONIO L	MKTX	Employee Stock Opiton (right to buy)	M - Exercise	D	9.95		-3,000		27,000
2015-12-29	2015-12-28	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		9.9500	3,000	30		54,579
2015-12-11	2015-12-11	4	McVey Richard M	MKTX	Performance Shares	M - Exercise	D			-92,419		24,240
2015-12-11	2015-12-11	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D			92,419			1,093,827
2015-12-08	2015-12-07	4	Casper Stephen P	MKTX	Common Stock, par value $0.003	S - Sale	D		112.3985	-1,500	-169		43,866
2015-12-01	2015-11-27	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	G - Gift	D			-10,000			1,001,408
2015-11-25	2015-11-23	4	Casper Stephen P	MKTX	Common Stock, par value $0.003	G - Gift	D			-140			45,366
2015-11-25	2015-11-23	4	Hersch Ronald M	MKTX	Common Stock, par value $0.003 per share	G - Gift	D			-474			31,633
2015-11-10	2015-11-10	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		98.9429	-2,957	-293		1,011,408
2015-11-10	2015-11-10	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		97.9822	-7,789	-763		1,014,365
2015-11-10	2015-11-09	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		99.7655	-2,200	-219		1,022,154
2015-11-10	2015-11-09	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		99.0625	-26,114	-2,587		1,024,354
2015-11-10	2015-11-09	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		98.3235	-940	-92		1,050,468
2015-08-14	2015-08-13	4	GOMACH DAVID G	MKTX	Employee Stock Option (right to buy)	M - Exercise	D	9.30		-5,000		0
2015-08-14	2015-08-13	4	GOMACH DAVID G	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		95.7100	-1,496	-143		2,576
2015-08-14	2015-08-13	4	GOMACH DAVID G	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		94.9500	-3,504	-333		4,072
2015-08-14	2015-08-13	4	GOMACH DAVID G	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		9.3000	5,000	46		7,576
2015-08-12	2015-08-11	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		96.9182	-3,747	-363		1,051,408
2015-08-12	2015-08-11	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		96.1730	-4,399	-423		1,055,155
2015-08-12	2015-08-11	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		95.1454	-5,200	-495		1,059,554
2015-08-12	2015-08-10	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		98.9947	-4,761	-471		1,064,754
2015-08-12	2015-08-10	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		98.2820	-5,691	-559		1,069,515
2015-08-12	2015-08-10	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		97.4491	-16,202	-1,579		1,075,206
2015-08-12	2015-08-11	4	DELISE ANTONIO L	MKTX	Employee Stock Option (right to buy)	M - Exercise	D	9.95		-10,000		30,000
2015-08-12	2015-08-11	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		95.7237	-5,660	-542		51,579
2015-08-12	2015-08-11	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		9.9500	10,000	100		57,239
2015-08-10	2015-08-06	4	Sullivan James Joseph	MKTX	Common Stock, par value $0.003 per share	A - Award	D			972			6,756
2015-08-10	2015-08-06	4	Steinhardt John	MKTX	Common Stock, par value $0.003 per share	A - Award	D			972			25,388
2015-08-10	2015-08-06	4	Hersch Ronald M	MKTX	Common Stock, par value $0.003 per share	A - Award	D			972			32,107
2015-08-10	2015-08-06	4	HERNANDEZ CARLOS MAURICIO	MKTX	Common Stock, par value $0.003 per share	A - Award	D			972			18,727
2015-08-10	2015-08-06	4	Cruger William Frank Jr.	MKTX	Common Stock, par value $0.003 per share	A - Award	D			972			3,550
2015-08-10	2015-08-06	4	Chwick Jane	MKTX	Common Stock, par value $0.003 per share	A - Award	D			972			3,563
2015-08-10	2015-08-06	4	Casper Stephen P	MKTX	Common Stock, par value $0.003	A - Award	D			1,177			45,506
2015-08-10	2015-08-06	4	Begleiter Steven L	MKTX	Common Stock, par value $0.003 per share	A - Award	D			972			6,756
2015-08-10	2015-08-06	4	GOMACH DAVID G	MKTX	Common Stock, par value $0.003 per share	A - Award	D			972			2,576
2015-07-16	2015-07-14	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	G - Gift	D			-250			73,742
2015-05-12	2015-05-12	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		86.0764	-1,442	-124		1,091,408
2015-05-12	2015-05-12	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		85.3491	-5,958	-509		1,092,850
2015-05-12	2015-05-11	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		86.1448	-11,100	-956		1,098,808
2015-05-12	2015-05-11	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		85.6561	-9,000	-771		1,109,908
2015-05-12	2015-05-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		85.7577	-1,200	-103		1,118,908
2015-05-12	2015-05-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		84.9199	-11,300	-960		1,120,108
2015-05-06	2015-05-05	4	DELISE ANTONIO L	MKTX	Employee Stock Opiton (right to buy)	M - Exercise	D	9.95		-4,000		40,000
2015-05-06	2015-05-05	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		9.9500	4,000	40		47,239
2015-03-10	2015-03-10	4	Steinhardt John	MKTX	Common Stock, par value $0.003 per share	G - Gift	D			-4,589			24,416
2015-03-10	2015-03-09	4	Steinhardt John	MKTX	Employee Stock Option (right to buy)	M - Exercise	D	10.04		-5,000		0
2015-03-10	2015-03-09	4	Steinhardt John	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		10.0400	5,000	50		29,005
2015-03-06	2015-03-06	4	Hersch Ronald M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		84.2739	-1,975	-166		31,135
2015-03-06	2015-03-06	4	Hersch Ronald M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		85.7100	-400	-34		33,110
2015-03-06	2015-03-05	4	Hersch Ronald M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		85.5850	-2,000	-171		33,510
2015-02-27	2015-02-26	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		80.9211	-7,000	-566		43,239
2015-02-20	2015-02-20	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	A - Award	D			3,696			73,992
2015-02-20	2015-02-20	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	A - Award	D			14,783			1,131,408
2015-02-20	2015-02-20	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		79.2588	-800	-63		1,116,625
2015-02-20	2015-02-19	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		80.1139	-2,743	-220		1,117,425
2015-02-20	2015-02-18	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		81.3561	-1,248	-102		1,120,168
2015-02-20	2015-02-18	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		80.2959	-15,222	-1,222		1,121,416
2015-02-20	2015-02-20	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	A - Award	D			1,386			50,239
2015-02-13	2015-02-12	4	GOMACH DAVID G By Trust	MKTX	Common Stock, par value $0.003 per share	S - Sale	I		81.4265	-4,000	-326		32,876
2015-02-11	2015-02-10	4	Casper Stephen P	MKTX	Employee Stock Option (right to buy)	M - Exercise	D	10.04		-5,000		0
2015-02-11	2015-02-10	4	Casper Stephen P	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		80.3471	-630	-51		44,329
2015-02-11	2015-02-10	4	Casper Stephen P	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		10.0400	5,000	50		44,959
2015-02-11	2015-02-10	4	Hersch Ronald M	MKTX	Employee Stock Option (right to buy)	M - Exercise	D	10.04		-5,000		0
2015-02-11	2015-02-10	4	Hersch Ronald M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		80.5142	-625	-50		35,510
2015-02-11	2015-02-10	4	Hersch Ronald M	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		10.0400	5,000	50		36,135
2015-02-10	2015-02-10	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		80.7000	-5,000	-404		70,296
2015-02-10	2015-02-09	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		80.0295	-2,919	-234		75,296
2015-02-10	2015-02-09	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		81.0000	-2,000	-162		78,215
2015-02-02	2015-01-31	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		75.9700	-1,416	-108		80,215
2015-01-20	2015-01-15	4	McVey Richard M	MKTX	Performance Shares	A - Award	D			116,659		116,659
2015-01-20	2015-01-15	4	McVey Richard M	MKTX	Employee Stock Option (right to buy)	A - Award	D	88.25		119,981		119,981
2015-01-20	2015-01-15	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	A - Award	D			25,084			1,136,638
2015-01-20	2015-01-15	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		70.6000	-499	-35		1,111,554
2015-01-20	2015-01-15	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		70.6000	-6,232	-440		1,112,053
2015-01-20	2015-01-15	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		70.6000	-6,244	-441		1,118,285
2015-01-20	2015-01-15	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	A - Award	D			8,290			81,631
2015-01-20	2015-01-15	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		70.6000	-143	-10		73,341
2015-01-20	2015-01-15	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		70.6000	-1,781	-126		73,484
2015-01-20	2015-01-15	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		70.6000	-2,183	-154		75,265
2015-01-20	2015-01-15	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		70.6000	-1,358	-96		77,448
2015-01-20	2015-01-15	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		70.6000	-1,818	-128		78,806
2015-01-20	2015-01-15	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	A - Award	D			2,763			48,853
2015-01-20	2015-01-15	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		70.6000	-51	-4		46,090
2015-01-20	2015-01-15	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		70.6000	-636	-45		46,141
2015-01-20	2015-01-15	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		70.6000	-780	-55		46,777
2015-01-20	2015-01-15	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		70.6000	-1,430	-101		47,557
2015-01-20	2015-01-15	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		70.6000	-392	-28		48,987
2015-01-20	2015-01-15	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		70.6000	-292	-21		49,379
2015-01-16	2015-01-14	4	Themelis Nicholas	MKTX	Empoyee Stock Option (Right to Buy)	M - Exercise	D	11.18		-8,646		0
2015-01-16	2015-01-14	4	Themelis Nicholas	MKTX	Empoyee Stock Option (Right to Buy)	M - Exercise	D	12.96		-1,403		0
2015-01-16	2015-01-14	4	Themelis Nicholas	MKTX	Empoyee Stock Option (Right to Buy)	M - Exercise	D	10.93		-15,786		20,064
2015-01-16	2015-01-14	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		72.9600	-1,325	-97		80,624
2015-01-16	2015-01-14	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		11.1800	8,646	97		81,949
2015-01-16	2015-01-14	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		72.9600	-250	-18		73,303
2015-01-16	2015-01-14	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		12.9600	1,403	18		72,553
2015-01-16	2015-01-14	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		72.9600	-2,365	-173		72,150
2015-01-16	2015-01-14	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		10.9300	15,786	173		74,515
2014-12-29	2014-12-24	4	DELISE ANTONIO L	MKTX	Employee Stock Option (right to buy)	M - Exercise	D	9.95		-6,000		44,000
2014-12-29	2014-12-24	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		9.9500	6,000	60		49,671
2014-12-09	2014-12-08	4	Casper Stephen P	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		69.0560	-2,000	-138		39,959
2014-12-09	2014-12-08	4	Hersch Ronald M	MKTX	Common Stock, par value $0.003 per share	G - Gift	D			-146			31,135
2014-12-08	2014-12-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		69.2318	-1,100	-76		1,124,529
2014-12-08	2014-12-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		68.1295	-4,989	-340		1,125,629
2014-12-08	2014-12-05	4	McVey Richard M	MKTX	Employee Stock Option (right to buy)	M - Exercise	D	15.60		-5,500		0
2014-12-08	2014-12-05	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		67.7803	-5,500	-373		1,130,618
2014-12-08	2014-12-05	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		15.6000	5,500	86		1,136,118
2014-12-08	2014-12-05	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	G - Gift	D			-10,000			1,130,618
2014-11-18	2014-11-14	4	McVey Richard M	MKTX	Employee Stock Option (right to buy)	M - Exercise	D	15.60		-7,000		5,500
2014-11-18	2014-11-14	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		65.6627	-7,000	-460		1,140,618
2014-11-18	2014-11-14	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		15.6000	7,000	109		1,147,618
2014-11-14	2014-11-14	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		66.0700	-600	-40		58,729
2014-11-14	2014-11-14	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		15.6000	2,538	40		59,329
2014-11-14	2014-11-13	4	Themelis Nicholas	MKTX	Common Stock (Right to Buy)	M - Exercise	D	15.60		-2,538		0
2014-10-29	2014-10-27	4	McVey Richard M	MKTX	Employee Stock Option (right to buy)	M - Exercise	D	12.96		-30,460		89,540
2014-10-29	2014-10-27	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	J - Other	D			-30,460			1,140,618
2014-10-29	2014-10-27	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		12.9600	30,460	395		1,171,078
2014-09-12	2014-09-12	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	G - Gift	D			-10,000			1,140,618
2014-09-08	2014-09-08	4	Casper Stephen P	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		59.4793	-1,500	-89		41,959
2014-09-05	2014-09-03	4	Hersch Ronald M	MKTX	Common Stock, par value $0.003 per share	G - Gift	D			-500			31,281
2014-08-22	2014-08-21	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		57.5773	-11,000	-633		56,791
2014-08-13	2014-08-12	4	GOMACH DAVID G	MKTX	Employee Stock Option (right to buy)	M - Exercise	D	10.04		-5,000		0
2014-08-13	2014-08-12	4	GOMACH DAVID G By Trust	MKTX	Common Stock, par value $0.003 per share	S - Sale	I		56.5161	-5,000	-283		36,876
2014-08-13	2014-08-12	4	GOMACH DAVID G By Trust	MKTX	Common Stock, par value $0.003 per share	M - Exercise	I		10.0400	5,000	50		41,876
2014-08-11	2014-08-08	4	GOMACH DAVID G	MKTX	Common Stock, par value $0.003 per share	A - Award	D			1,604			38,480
2014-08-11	2014-08-08	4	WEBSTER LESLEY DANIELS	MKTX	Common Stock, par value $0.003 per share	A - Award	D			1,604			3,231
2014-08-11	2014-08-08	4	Casper Stephen P	MKTX	Common Stock, par value $0.003 per share	A - Award	D			1,960			43,459
2014-08-11	2014-08-08	4	Steinhardt John	MKTX	Common Stock, par value $0.003 per share	A - Award	D			1,604			24,005
2014-08-11	2014-08-08	4	Hersch Ronald M	MKTX	Common Stock, par value $0.003 per share	A - Award	D			1,604			31,781
2014-08-11	2014-08-08	4	HERNANDEZ CARLOS MAURICIO	MKTX	Common Stock, par value $0.003 per share	A - Award	D			1,604			17,755
2014-08-11	2014-08-08	4	Begleiter Steven L	MKTX	Common Stock, par value $0.003 per share	A - Award	D			1,604			5,784
2014-08-11	2014-08-08	4	Sullivan James Joseph	MKTX	Common Stock, par value $0.003 per share	A - Award	D			1,604			5,784
2014-08-11	2014-08-08	4	Chwick Jane	MKTX	Common Stock, par value $0.003 per share	A - Award	D			1,604			2,591
2014-08-11	2014-08-08	4	Cruger William Frank Jr.	MKTX	Common Stock, par value $0.003 per share	A - Award	D			1,604			2,578
2014-08-01	2014-07-30	4	Casper Stephen P	MKTX	Employee Stock Option (right to buy)	M - Exercise	D	11.00		-10,000		0
2014-08-01	2014-07-30	4	Casper Stephen P	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		57.0511	-1,930	-110		41,499
2014-08-01	2014-07-30	4	Casper Stephen P	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		11.0000	10,000	110		43,429
2014-06-06	2014-06-04	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	G - Gift	D			-238			67,791
2014-04-30	2014-04-29	4	Steinhardt John	MKTX	Employee Stock Option (right to buy)	M - Exercise	D	11.00		-8,800		0
2014-04-30	2014-04-29	4	Steinhardt John	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		54.0269	-8,800	-475		22,401
2014-04-30	2014-04-29	4	Steinhardt John	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		11.0000	8,800	97		31,201
2014-04-30	2014-04-28	4	Steinhardt John	MKTX	Employee Stock Option (right to buy)	M - Exercise	D	11.00		-1,200		8,800
2014-04-30	2014-04-28	4	Steinhardt John	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		54.9815	-1,200	-66		22,401
2014-04-30	2014-04-28	4	Steinhardt John	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		11.0000	1,200	13		23,601
2014-03-13	2014-03-11	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	G - Gift	D			-156			68,029
2014-01-31	2014-01-30	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	A - Award	D			2,663			43,671
2014-01-31	2014-01-30	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	A - Award	D			26,100			1,150,618
2014-01-31	2014-01-30	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	A - Award	D			7,457			68,185
2014-01-23	2014-01-15	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		63.0700	-6,127	-386		41,008
2014-01-23	2014-01-15	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	A - Award	D			3,028			47,135
2014-01-23	2014-01-15	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		63.0700	-17,136	-1,081		1,124,518
2014-01-23	2014-01-15	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	A - Award	D			26,087			1,141,654
2014-01-23	2014-01-15	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		63.0700	-11,632	-734		60,728
2014-01-23	2014-01-15	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	A - Award	D			8,075			72,360
2013-12-20	2013-12-20	4	GOMACH DAVID G	MKTX	Common Stock, par value $0.003 per share	G - Gift	D			-1,000			36,876
2013-11-27	2013-11-25	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	G - Gift	D			-10,000			1,115,567
2013-11-22	2013-11-22	4	DELISE ANTONIO L	MKTX	Employee Stock Option (right to buy)	M - Exercise	D	9.95		-25,000		50,000
2013-11-22	2013-11-22	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		70.4256	-25,000	-1,761		44,107
2013-11-22	2013-11-22	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		9.9500	25,000	249		69,107
2013-11-21	2013-11-20	4	Themelis Nicholas	MKTX	Employee Stock Option (right to buy)	M - Exercise	D	12.96		-6,659		1,403
2013-11-21	2013-11-20	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		68.3011	-6,659	-455		64,285
2013-11-21	2013-11-20	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		12.9600	6,659	86		70,944
2013-11-21	2013-11-19	4	Themelis Nicholas	MKTX	Employee Stock Option (right to buy)	M - Exercise	D	12.96		-20,818		8,062
2013-11-21	2013-11-19	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		69.0200	-400	-28		64,285
2013-11-21	2013-11-19	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		68.3907	-20,418	-1,396		64,685
2013-11-21	2013-11-19	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		12.9600	20,818	270		85,103
2013-11-05	2013-11-01	4	Cruger William Frank Jr.	MKTX	Common Stock, par value $0.003 per share	A - Award	D			974			974
2013-11-01	2013-10-31	4	McVey Richard M	MKTX	Employee Stock Option (right to buy)	M - Exercise	D	12.96		-30,000		120,000
2013-11-01	2013-10-31	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	J - Other	D			-30,000			1,125,567
2013-11-01	2013-10-31	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		12.9600	30,000	389		1,155,567
2013-10-21	2013-10-18	4	Chwick Jane	MKTX	Common Stock, par value $0.003 per share	A - Award	D			987			987
2013-10-08	2013-10-07	4	Hersch Ronald M	MKTX	Common Stock, par value $0.003 per share	G - Gift	D			-650			30,177
2013-08-02	2013-07-31	4	Hersch Ronald M	MKTX	Employee Stock Option (right to buy)	M - Exercise	D	11.00		-10,000		0
2013-08-02	2013-07-31	4	Hersch Ronald M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		51.9924	-10,000	-520		30,827
2013-08-02	2013-07-31	4	Hersch Ronald M	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		11.0000	10,000	110		40,827
2013-07-30	2013-07-30	4	GOMACH DAVID G	MKTX	Employee Stock Option (right to buy)	M - Exercise	D	13.70		-5,000		0
2013-07-30	2013-07-30	4	GOMACH DAVID G	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		52.2011	-5,000	-261		37,876
2013-07-30	2013-07-30	4	GOMACH DAVID G	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		13.7000	5,000	68		42,876
2013-07-30	2013-07-26	4	GOMACH DAVID G	MKTX	Common Stock, par value $0.003 per share	A - Award	D			1,627			37,876
2013-07-30	2013-07-26	4	WEBSTER LESLEY DANIELS	MKTX	Common Stock, par value $0.003 per share	A - Award	D			1,627			1,627
2013-07-30	2013-07-26	4	Casper Stephen P	MKTX	Common Stock, par value $0.003 per share	A - Award	D			2,010			33,429
2013-07-30	2013-07-29	4	Steinhardt John	MKTX	Common Stock, par value $0.003 per share	G - Gift	D			-10,475			22,401
2013-07-30	2013-07-26	4	Steinhardt John	MKTX	Common Stock, par value $0.003 per share	A - Award	D			1,627			32,876
2013-07-30	2013-07-26	4	Hersch Ronald M	MKTX	Common Stock, par value $0.003 per share	A - Award	D			1,627			30,827
2013-07-30	2013-07-26	4	HERNANDEZ CARLOS MAURICIO	MKTX	Common Stock, par value $0.003 per share	A - Award	D			1,627			16,151
2013-07-30	2013-07-26	4	Begleiter Steven L	MKTX	Common Stock, par value $0.003 per share	A - Award	D			1,627			4,180
2013-07-30	2013-07-26	4	Sullivan James Joseph	MKTX	Common Stock, par value $0.003 per share	A - Award	D			1,627			4,180
2013-06-11	2013-06-11	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		45.8654	-9,407	-431		1,125,567
2013-06-11	2013-06-11	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		45.1121	-10,320	-466		1,134,974
2013-06-11	2013-06-10	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		45.6143	-20,273	-925		1,145,294
2013-06-11	2013-06-07	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		44.3966	-35,000	-1,554		1,165,567
2013-05-20	2013-05-17	4	DELISE ANTONIO L By wife	MKTX	Common Stock, par value $0.003 per share	S - Sale	I		45.3000	-11,864	-537		0
2013-05-20	2013-05-16	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		45.8864	-17,000	-780		64,285
2013-05-10	2013-05-10	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		43.9459	-12,000	-527		1,200,567
2013-05-10	2013-05-09	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		43.7500	-17,692	-774		1,212,567
2013-05-10	2013-05-08	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		43.7689	-20,000	-875		1,230,259
2013-04-25	2013-04-24	4	Hersch Ronald M	MKTX	Common Stock, par value $0.003 per share	G - Gift	D			-600			29,200
2013-03-14	2013-03-14	4	DELISE ANTONIO L By wife	MKTX	Common Stock, par value $0.003 per share	S - Sale	I		39.0000	-2,771	-108		11,864
2013-03-14	2013-03-12	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		39.2374	-15,490	-608		1,250,259
2013-03-13	2013-03-11	4	DELISE ANTONIO L By wife	MKTX	Common Stock, par value $0.003 per share	S - Sale	I		39.5084	-12,229	-483		14,635
2013-02-13	2013-02-12	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	J - Other	D			-12,500			1,265,749
2013-02-08	2013-02-07	4	McVey Richard M	MKTX	Employee Stock Option (right to buy)	M - Exercise	D	15.60		-12,500		12,500
2013-02-08	2013-02-07	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		15.6000	12,500	195		1,278,249
2013-02-06	2013-02-04	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	A - Award	D			1,579			53,845
2013-02-06	2013-02-04	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	A - Award	D			24,215			1,265,749
2013-02-06	2013-02-04	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	A - Award	D			5,264			81,285
2013-01-17	2013-01-15	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		35.9800	-7,547	-272		52,266
2013-01-17	2013-01-15	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	A - Award	D			4,580			59,813
2013-01-17	2013-01-15	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		35.9800	-43,324	-1,559		1,241,534
2013-01-17	2013-01-15	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	A - Award	D			44,882			1,284,858
2013-01-17	2013-01-15	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		35.9800	-16,293	-586		76,021
2013-01-17	2013-01-15	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	A - Award	D			12,823			92,314
2012-12-18	2012-12-14	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	G - Gift	D			-30,000			1,239,976
2012-12-14	2012-12-13	4	Themelis Nicholas	MKTX	Employee Stock Option (right to buy)	M - Exercise	D	13.95		-41,749		0
2012-12-14	2012-12-13	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		32.2361	-41,749	-1,346		79,491
2012-12-14	2012-12-13	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		13.9500	41,749	582		121,240
2012-12-14	2012-12-14	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		32.8719	-30,784	-1,012		1,269,976
2012-12-14	2012-12-13	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		32.2508	-20,000	-645		1,300,760
2012-12-14	2012-12-12	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		32.5370	-9,216	-300		1,320,760
2012-12-12	2012-12-12	4	Themelis Nicholas	MKTX	Employee Stock Option (right to buy)	M - Exercise	D	13.95		-16,904		41,749
2012-12-12	2012-12-12	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		32.6301	-16,904	-552		79,491
2012-12-12	2012-12-12	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		13.9500	16,904	236		96,395
2012-12-12	2012-12-11	4	Themelis Nicholas	MKTX	Employee Stock Option (right to buy)	M - Exercise	D	13.95		-16,278		58,653
2012-12-12	2012-12-11	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		32.4764	-16,278	-529		79,491
2012-12-12	2012-12-11	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		13.9500	16,278	227		95,769
2012-12-12	2012-12-10	4	Themelis Nicholas	MKTX	Employee Stock Option (right to buy)	M - Exercise	D	13.95		-25,069		74,931
2012-12-12	2012-12-10	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		32.6673	-15,069	-492		79,491
2012-12-12	2012-12-10	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		13.9500	25,069	350		94,560
2012-12-10	2012-12-07	4	Hersch Ronald M	MKTX	Common Stock, par value $0.003 per share	G - Gift	D			-750			29,800
2012-07-31	2012-07-27	4	GOMACH DAVID G	MKTX	Common Stock, par value $0.003 per share	A - Award	D			2,553			36,249
2012-07-31	2012-07-27	4	Casper Stephen P	MKTX	Common Stock, par value $0.003 per share	A - Award	D			2,553			31,419
2012-07-31	2012-07-27	4	Steinhardt John	MKTX	Common Stock, par value $0.003 per share	A - Award	D			2,553			31,249
2012-07-31	2012-07-27	4	Hersch Ronald M	MKTX	Common Stock, par value $0.003 per share	A - Award	D			2,553			30,550
2012-07-31	2012-07-27	4	HERNANDEZ CARLOS MAURICIO	MKTX	Common Stock, par value $0.003 per share	A - Award	D			2,553			14,524
2012-07-31	2012-07-27	4	Burkhardt Roger	MKTX	Common Stock, par value $0.003 per share	A - Award	D			2,553			13,161
2012-07-31	2012-07-27	4	Brown-Hruska Sharon	MKTX	Common Stock, par value $0.003 per share	A - Award	D			2,553			10,346
2012-07-31	2012-07-27	4	Begleiter Steven L	MKTX	Common Stock, par value $0.003 per share	A - Award	D			2,553			2,553
2012-07-31	2012-07-27	4	Sullivan James Joseph	MKTX	Common Stock, par value $0.003 per share	A - Award	D			2,553			2,553
2012-06-13	2012-06-12	4	DELISE ANTONIO L By wife	MKTX	Common Stock, par value $0.003 per share	S - Sale	I		30.1352	-6,000	-181		17,126
2012-06-13	2012-06-12	4	Themelis Nicholas	MKTX	Employee Stock Option (right to buy)	M - Exercise	D	15.60		-32,379		2,538
2012-06-13	2012-06-12	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		30.1150	-32,379	-975		69,491
2012-06-13	2012-06-12	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		15.6000	32,379	505		101,870
2012-06-13	2012-06-11	4	Themelis Nicholas	MKTX	Employee Stock Option (right to buy)	M - Exercise	D	15.60		-5,083		34,917
2012-06-13	2012-06-11	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		30.4974	-17,263	-526		69,491
2012-06-13	2012-06-11	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		15.6000	5,083	79		86,754
2012-05-23	2012-05-23	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		31.9458	-20,000	-639		1,329,976
2012-05-23	2012-05-22	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		32.1593	-9,783	-315		1,349,976
2012-05-23	2012-05-21	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	S - Sale	D		32.2953	-9,076	-293		1,359,759
2012-05-11	2012-05-09	4	McVey Richard M	MKTX	Employee Stock Option (right to buy)	M - Exercise	D	2.70		-111,111		0
2012-05-11	2012-05-09	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		2.7000	111,111	300		1,368,835
2012-05-07	2012-05-03	4	McVey Richard M	MKTX	Employee Stock Option (right to buy)	M - Exercise	D	2.70		-888,889		0
2012-05-07	2012-05-03	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		33.5700	-422,565	-14,186		1,257,724
2012-05-07	2012-05-03	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		2.7000	888,889	2,400		1,680,289
2012-03-27	2012-03-27	4	McVey Richard M	MKTX	Employee Stock Option (right to buy)	M - Exercise	D	2.70		-7,037		0
2012-03-27	2012-03-27	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	M - Exercise	D		2.7000	7,037	19		791,400
2012-02-09	2012-02-03	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	A - Award	D			11,613			81,671
2012-02-03	2012-02-03	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	A - Award	D			6,334			66,272
2012-02-03	2012-02-03	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	A - Award	D			42,233			784,363
2012-01-19	2012-01-15	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		30.6400	-8,618	-264		59,938
2012-01-19	2012-01-13	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	A - Award	D			3,171			68,556
2012-01-19	2012-01-13	4	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share	A - Award	D			32,520			65,385
2012-01-19	2012-01-15	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		30.6400	-73,444	-2,250		742,130
2012-01-19	2012-01-13	4	McVey Richard M	MKTX	Common Stock, par value $0.003 per share	A - Award	D			48,616			815,574
2012-01-19	2012-01-15	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	F - Taxes	D		30.6400	-25,082	-769		70,058
2012-01-19	2012-01-13	4	Themelis Nicholas	MKTX	Common Stock, par value $0.003 per share	A - Award	D			10,569			95,140
2010-03-12		3	DELISE ANTONIO L	MKTX	Common Stock, par value $0.003 per share		D						51,685
2004-11-04		3	Markowitz Jerome S	MKTX	Common Stock, par value $0.003 per share		D						6,807
2004-11-04		3	Markowitz Jerome S	MKTX	Common Stock, par value $0.003 per share		D						2,707
2004-11-04		3	Rucker James N B	MKTX	Common Stock, par value $0.003 per share		D						53,334
2004-11-04		3	McVey Richard M By Trusts	MKTX	Common Stock, par value $0.003 per share		I						583,334
2004-11-04		3	McVey Richard M	MKTX	Common Stock, par value $0.003 per share		D						921,436

Pembelian sekuritas non-derivatif atau derivatif di pasar terbuka atau secara pribadi.

Penjualan terbuka atau penjualan pribadi atas sekuritas non-derivatif atau derivatif.

Hibah, penghargaan, atau perolehan sekuritas lainnya dari perusahaan (seperti opsi)

Konversi turunan

Penjualan atau pengalihan sekuritas kembali ke perusahaan.

Pembayaran harga pelaksanaan atau kewajiban pajak menggunakan sebagian sekuritas yang diterima dari perusahaan.

Pemberian sekuritas oleh atau kepada orang dalam.

Swap ekuitas dan transaksi lindung nilai serupa

Pelaksanaan atau konversi sekuritas derivatif yang diterima dari perusahaan (seperti opsi)

Transaksi yang dilaporkan secara sukarela pada Formulir 4.

Lainnya (disertai dengan catatan kaki yang menjelaskan transaksi tersebut)

IT:1MKTX	€ 156.65
MX:MKTX
DE:MWI	€ 152.50

MKTX / MarketAxess Holdings Inc. - Insider Trading and Ownership Report - SEC Form 3, 4, 5