Investor Summit Partners L P
13D/G Filings

This page shows a list of all the recent 13D/G filings made by Summit Partners L P . Schedule 13D is commonly referred to as a “beneficial ownership report.” The term "beneficial owner" is defined under SEC rules. It includes any person who directly or indirectly shares voting power or investment power (the power to sell the security).

When a person or group of persons acquires beneficial ownership of more than 5% of a voting class of a company’s equity securities, they are required to file a Schedule 13D within ten days after the purchase. Click the link icon to see the full transaction history.

Date Form Target Prev
Shares
Current
Shares
Change
(Percent)
Ownership
(Percent)
Change
(Percent)
2025-08-08 13G/A KVYO / Klaviyo, Inc. 38,827,778 30,827,778
2025-05-07 13G/A KVYO / Klaviyo, Inc. 40,827,778 38,827,778
2025-02-07 13G/A KVYO / Klaviyo, Inc. 46,427,778 40,827,778
2024-11-08 13G/A ATEN / A10 Networks, Inc. 3,888,206 606,263
2024-11-08 13G/A KVYO / Klaviyo, Inc. 47,741,629 46,427,778
2024-11-08 13G/A LFST / LifeStance Health Group, Inc. 45,734,703 41,932,358
2024-02-07 13G/A ESMT / EngageSmart, Inc. 26,926,752 0
2024-02-07 13G/A ATEN / A10 Networks, Inc. 3,877,890 3,888,206
2024-01-31 13G KVYO / Klaviyo, Inc. 47,741,629
2023-02-01 13G/A ATEN / A10 Networks, Inc. 8,860,941 3,877,890
2022-02-09 13G DTC / Solo Brands, Inc. 44,034,960
2022-02-04 13G ESMT / EngageSmart, Inc. 26,926,752
2022-02-04 13G LFST / LifeStance Health Group, Inc. 45,734,703
2022-02-04 13G/A ATEN / A10 Networks, Inc. 9,539,076 8,860,941
2022-02-04 13G AKA / a.k.a. Brands Holding Corp. 72,644,324
2021-02-04 13G/A ATEN / A10 Networks, Inc. 9,515,529 9,539,076
2020-01-28 13G/A ATEN / A10 Networks, Inc. 9,427,846 9,515,529
2019-02-13 13G/A CASA / Casa Systems, Inc. 34,124,480
2018-02-12 13G CASA / Casa Systems, Inc. 38,842,000
2018-02-12 13G/A US00401C1080 / Acacia Communications, Inc. 2,550,127 1,300,127
2017-04-11 13D/A WGO / Winnebago Industries, Inc. 2,293,277 0
2017-02-08 13G US00401C1080 / Acacia Communications, Inc. 2,550,127
2016-11-16 13D WGO / Winnebago Industries, Inc. 2,293,277
2016-06-29 13G/A MTSI / MACOM Technology Solutions Holdings, Inc. 7,486,617 2,486,617
2016-02-05 13G/A MTSI / MACOM Technology Solutions Holdings, Inc. 7,486,617
2015-02-04 13G/A US34954WAA27 / Fortegra Financial Corp 0
2015-02-04 13G ATEN / A10 Networks, Inc. 9,427,846
2014-01-17 13G/A FLT / Corpay, Inc. 2,132,156
2014-01-17 13G/A UI / Ubiquiti Inc. 2,264,079
2013-02-13 13G/A FLT / Corpay, Inc. 10,132,156
2013-02-12 13G MTSI / MACOM Technology Solutions Holdings, Inc. 9,745,341
2013-02-12 13G/A UI / Ubiquiti Inc. 16,095,543
2012-02-13 13G UI / Ubiquiti Inc. 20,095,543
2012-02-13 13G/A EVRI / Everi Holdings Inc. 0