SSD / Simpson Manufacturing Co., Inc. - Pengajuan SECLaporan Tahunan, Pernyataan Proksi

Simpson Manufacturing Co., Inc.
US ˙ NYSE ˙ US8290731053

Mga Batayang Estadistika
LEI 529900EJUNNL15LZ8056
CIK 920371
SEC Filings
All companies that sell securities in the United States must register with the Securities and Exchange Commission (SEC) and file reports on a regular basis. These reports include company annual reports (10K, 10Q), news updates (8K), investor presentations (found in 8Ks), insider trades (form 4), ownership reports (13D, and 13G), and reports related to the specific securities sold, such as registration statements and prospectus. This page shows recent SEC filings related to Simpson Manufacturing Co., Inc.
SEC Filings (Chronological Order)
Halaman ini menyediakan daftar lengkap dan kronologis dari Pengajuan SEC, tidak termasuk pengajuan kepemilikan yang kami sediakan di tempat lain.
August 13, 2025 SD

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdict

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Commission file number) (I.R.S. Employer Identification No.) 5956 W. Las Positas Boulevard, Pleasanton, CA 94588 (Address of pr

August 8, 2025 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended: June 30, 2025 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 1-13429 Simpson Man

July 28, 2025 EX-99.2

Strong Foundation. Stronger Future. Simpson Manufacturing Co., Inc. Investor Presentation July 2025 Safe Harbor This presentation contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, Section

exhibit992072025investor Strong Foundation. Stronger Future. Simpson Manufacturing Co., Inc. Investor Presentation July 2025 Safe Harbor This presentation contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. Forward-lo

July 28, 2025 EX-99.1

Simpson Manufacturing Co., Inc. Announces 2025 Second Quarter Financial Results and Reaffirms 2025 Guidance l Net sales of $631.1 million increased 5.7% year-over-year l Income from operations of $140.2 million increased 6.1% year-over-year l Net inc

Exhibit 99.1 Press Release dated July 28, 2025 Simpson Manufacturing Co., Inc. Announces 2025 Second Quarter Financial Results and Reaffirms 2025 Guidance l Net sales of $631.1 million increased 5.7% year-over-year l Income from operations of $140.2 million increased 6.1% year-over-year l Net income per diluted share of $2.47 increased 6.9% year-over-year l Repurchased $35.0 million of common stoc

July 28, 2025 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 28, 2025 Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Commis

June 30, 2025 11-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 11-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 11-K (Mark One) ý ANNUAL REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2024 OR o TRANSITION REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 1-13429 A. Full title of the plan and

June 30, 2025 EX-99

Financial statements for the Simpson Manufacturing Co., Inc. 401(k) Profit Sharing Plan for the fiscal year ended December 31, 2024

Exhibit 99.1 SIMPSON MANUFACTURING CO., INC. 401(k) PROFIT SHARING PLAN Financial Statements and Supplemental Information As of December 31, 2024 and 2023 and for the Year Ended December 31, 2024 (With Report of Independent Registered Public Accounting Firm Thereon) TABLE OF CONTENTS Page No. Report of Independent Registered Public Accounting Firm 1 Statements of Net Assets Available for Benefits

May 12, 2025 S-8

As filed with the Securities and Exchange Commission on May 12, 2025

S-8 1 ssdforms-8espp052025.htm S-8 As filed with the Securities and Exchange Commission on May 12, 2025 Registration No. 333- UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM S-8 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 SIMPSON MANUFACTURING CO., INC. (Exact name of registrant as specified in its charter) Delaware 94-3196943 (State or other jurisdiction o

May 12, 2025 EX-FILING FEES

Calculation of Filing Fee Table

Calculation of Filing Fee Tables S-8 Simpson Manufacturing Co., Inc. Table 1: Newly Registered Securities Security Type Security Class Title Fee Calculation Rule Amount Registered Proposed Maximum Offering Price Per Unit Maximum Aggregate Offering Price Fee Rate Amount of Registration Fee 1 Equity Common Stock par value $0.01 per share Other 200,000 $ 156.23 $ 31,246,000.00 0.0001531 $ 4,783.76 To

May 12, 2025 8-K

Financial Statements and Exhibits, Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 6, 2025 Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Commissi

May 9, 2025 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended: March 31, 2025 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 1-13429 Simpson Ma

April 28, 2025 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 28, 2025 Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Commi

April 28, 2025 EX-99.1

Simpson Manufacturing Co., Inc. Announces 2025 First Quarter Financial Results and Reaffirms 2025 Guidance l Net sales of $538.9 million increased 1.6% year-over-year l Income from operations of $102.3 million, resulting in operating income margin of

Exhibit 99.1 Press Release dated April 28, 2025 Simpson Manufacturing Co., Inc. Announces 2025 First Quarter Financial Results and Reaffirms 2025 Guidance l Net sales of $538.9 million increased 1.6% year-over-year l Income from operations of $102.3 million, resulting in operating income margin of 19.0% l Net income per diluted share of $1.85 l Repurchased $25.0 million in common stock Pleasanton,

April 28, 2025 EX-99.2

Strong Foundation. Stronger Future. Simpson Manufacturing Co., Inc. Investor Presentation April 2025 Exhibit 99.2 Safe Harbor This presentation contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of

Strong Foundation. Stronger Future. Simpson Manufacturing Co., Inc. Investor Presentation April 2025 Exhibit 99.2 Safe Harbor This presentation contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. Forward-looking state

March 24, 2025 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.

March 24, 2025 DEFA14A

Your Vote Counts! *Please check the meeting materials for any special requirements for meeting attendance. Smartphone users Point your camera here and vote without entering a control number For complete information and to vote, visit www.ProxyVote.co

ssddefa14aproxystatement Your Vote Counts! *Please check the meeting materials for any special requirements for meeting attendance.

March 24, 2025 ARS

2024 Annual Report 1 To our stockholders, customers, and employees For more than 68 years, Simpson Strong-Tie has dedicated itself to our company mission of delivering innovative solutions that help people design and build safer, stronger structures.

2024 Annual Report 1 To our stockholders, customers, and employees For more than 68 years, Simpson Strong-Tie has dedicated itself to our company mission of delivering innovative solutions that help people design and build safer, stronger structures.

March 7, 2025 EX-99.1

STRONG FOUNDATION. STRONGER FUTURE. Simpson Manufacturing Co., Inc. Investor Presentation March 2025 Exhibit 99.1 2 Safe Harbor This presentation contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act o

STRONG FOUNDATION. STRONGER FUTURE. Simpson Manufacturing Co., Inc. Investor Presentation March 2025 Exhibit 99.1 2 Safe Harbor This presentation contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. Forward-looking sta

March 7, 2025 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 7, 2025 Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Commis

March 3, 2025 EX-19.1

of Simpson Manufacturing Co., Inc.

1 Insider Trading Policy of Simpson Manufacturing Co., Inc. Effective date: February 20, 2025 Purpose Simpson Manufacturing Co., Inc. (collectively with its subsidiaries, the “Company”) has adopted this Insider Trading Policy (this “Policy”) to help its directors, officers and employees comply with insider trading laws. Persons subject to this Policy must not engage in illegal trading and must avo

March 3, 2025 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ☒ Annual Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the fiscal year ended December 31, 2024 OR ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the transition period from to . Commission file number: 1-13429 Simpson Manufa

March 3, 2025 EX-21

of Subsidiaries of the Registrant is filed herewith

84 Exhibit 21 Simpson Manufacturing Co., Inc. and Subsidiaries List of Subsidiaries of Simpson Manufacturing Co., Inc. At February 27, 2025 1. Simpson Strong-Tie Company Inc., a California corporation 2. Simpson Strong-Tie International, Inc., a California corporation 3. Simpson Strong-Tie Canada, Limited, a Canadian corporation 4. Simpson Strong-Tie Europe EURL, a French corporation 5. Simpson St

March 3, 2025 EX-4.1

Description of the Registrant’s Securities Registered Pursuant to Section 12 of the Securities Exchange Act of 1934 (incorporated by reference to Exhibit 4.1 to the Registrant’s Annual Report on Form 10-K for the year ended December 31, 2024 (File No. 001-13429), filed March 3, 2025)

Exhibit 4.1 DESCRIPTION OF THE REGISTRANT’S SECURITIES REGISTERED PURSUANT TO SECTION 12 OF THE SECURITIES EXCHANGE ACT OF 1934 As of December 31, 2024, Simpson Manufacturing Co., Inc. had one class of securities registered under Section 12 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”): (i) its common stock, $0.01 par value per share (“common stock”). References in the fo

February 10, 2025 EX-99.1

SIMPSON MANUFACTURING CO., INC. ANNOUNCES 2024 FOURTH QUARTER AND FULL-YEAR FINANCIAL RESULTS

Exhibit 99.1 Press Release dated February 10, 2025 SIMPSON MANUFACTURING CO., INC. ANNOUNCES 2024 FOURTH QUARTER AND FULL-YEAR FINANCIAL RESULTS l Full year 2024 net sales of $2.2 billion increased 0.8% year-over-year l Full year 2024 income from operations of $430.0 million, resulting in an operating income margin of 19.3% l Full year 2024 net income per diluted share of $7.60 l Declared a $0.28

February 10, 2025 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 10, 2025 Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Co

February 10, 2025 EX-99.2

STRONG FOUNDATION. STRONGER FUTURE. Simpson Manufacturing Co., Inc. Investor Presentation February 2025 Exhibit 99.2 2 Safe Harbor Note: The financial results in this presentation as of and for the fiscal year ended December 31, 2024 are unaudited. T

STRONG FOUNDATION. STRONGER FUTURE. Simpson Manufacturing Co., Inc. Investor Presentation February 2025 Exhibit 99.2 2 Safe Harbor Note: The financial results in this presentation as of and for the fiscal year ended December 31, 2024 are unaudited. This presentation contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, Section 27A of the Se

January 3, 2025 EX-99.1

Simpson Manufacturing Co., Inc. 5956 W. Las Positas Boulevard Pleasanton, CA 94588 Phone: 800.925.5099 Fax: 925.847.1597 www.simpsonmfg.com DRAFT NEWS RELEASE FOR IMMEDIATE RELEASE Simpson Manufacturing Co. Announces the Appointment of Angela Drake t

Simpson Manufacturing Co., Inc. 5956 W. Las Positas Boulevard Pleasanton, CA 94588 Phone: 800.925.5099 Fax: 925.847.1597 www.simpsonmfg.com DRAFT NEWS RELEASE FOR IMMEDIATE RELEASE Simpson Manufacturing Co. Announces the Appointment of Angela Drake to its Board of Directors Pleasanton, CA – January 3, 2025 –Simpson Manufacturing Co., Inc. (the “Company”) (NYSE: SSD), an industry leader in engineer

January 3, 2025 8-K

Regulation FD Disclosure, Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): December 31, 2024 Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Co

December 17, 2024 EX-99.1

STRONG FOUNDATION. STRONGER FUTURE. Simpson Manufacturing Co., Inc. 2024 Off-Season Engagement Exhibit 99.1 This presentation contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, Section 27A

STRONG FOUNDATION. STRONGER FUTURE. Simpson Manufacturing Co., Inc. 2024 Off-Season Engagement Exhibit 99.1 This presentation contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. Forward-looking statements generally ca

December 17, 2024 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): December 17, 2024 Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Co

November 14, 2024 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 14, 2024 Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Co

November 14, 2024 EX-99.1

STRONG FOUNDATION. STRONGER FUTURE. Simpson Manufacturing Co., Inc. Investor Presentation November 2024 Exhibit 99.1 2 Safe Harbor This presentation contains forward-looking statements within the meaning of the Private Securities Litigation Reform Ac

STRONG FOUNDATION. STRONGER FUTURE. Simpson Manufacturing Co., Inc. Investor Presentation November 2024 Exhibit 99.1 2 Safe Harbor This presentation contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. Forward-looking

November 12, 2024 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended: September 30, 2024 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 1-13429 Simpso

October 28, 2024 EX-99.1

Simpson Manufacturing Co., Inc. 5956 W. Las Positas Boulevard Pleasanton, CA 94588 Phone: 800.925.5099 Fax: 925.847.1597 www.simpsonmfg.com NEWS RELEASE FOR IMMEDIATE RELEASE Simpson Manufacturing Co. Appoints Matt Dunn as Chief Financial Officer and

Simpson Manufacturing Co., Inc. 5956 W. Las Positas Boulevard Pleasanton, CA 94588 Phone: 800.925.5099 Fax: 925.847.1597 www.simpsonmfg.com NEWS RELEASE FOR IMMEDIATE RELEASE Simpson Manufacturing Co. Appoints Matt Dunn as Chief Financial Officer and Treasurer Pleasanton, CA – October 28, 2024 –Simpson Manufacturing Co., Inc. (the “Company”) (NYSE: SSD), an industry leader in engineered structural

October 28, 2024 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 23, 2024 Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Com

October 21, 2024 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 21, 2024 Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Com

October 21, 2024 EX-99.1

SIMPSON MANUFACTURING CO., INC. ANNOUNCES 2024 THIRD QUARTER FINANCIAL RESULTS l Net sales of $587.2 million, increased 1.2% year-over-year l Income from operations of $124.9 million, resulting in operating income margin of 21.3% l Net income per dil

Exhibit 99.1 Press Release dated October 21, 2024 SIMPSON MANUFACTURING CO., INC. ANNOUNCES 2024 THIRD QUARTER FINANCIAL RESULTS l Net sales of $587.2 million, increased 1.2% year-over-year l Income from operations of $124.9 million, resulting in operating income margin of 21.3% l Net income per diluted share of $2.21 l Revising full year 2024 outlook based on reduced housing start expectations Pl

August 26, 2024 EX-99.1

STRONG FOUNDATION. STRONGER FUTURE. Simpson Manufacturing Co., Inc. Investor Presentation August 2024 Exhibit 99.1 2 Safe Harbor This presentation contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act

STRONG FOUNDATION. STRONGER FUTURE. Simpson Manufacturing Co., Inc. Investor Presentation August 2024 Exhibit 99.1 2 Safe Harbor This presentation contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. Forward-looking st

August 26, 2024 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 26, 2024 Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Comm

August 7, 2024 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended: June 30, 2024 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 1-13429 Simpson Man

July 31, 2024 EX-99.1

Simpson Manufacturing Co., Inc. 5956 W. Las Positas Boulevard Pleasanton, CA 94588 Phone: 800.925.5099 Fax: 925.847.1597 www.simpsonmfg.com Exhibit 99.1 NEWS RELEASE FOR IMMEDIATE RELEASE Simpson Manufacturing Co. Announces Retirement of Chief Financ

Simpson Manufacturing Co., Inc. 5956 W. Las Positas Boulevard Pleasanton, CA 94588 Phone: 800.925.5099 Fax: 925.847.1597 www.simpsonmfg.com Exhibit 99.1 NEWS RELEASE FOR IMMEDIATE RELEASE Simpson Manufacturing Co. Announces Retirement of Chief Financial Officer and Treasurer, Brian Magstadt Pleasanton, CA – July 31, 2024 –Simpson Manufacturing Co., Inc. (the “Company”) (NYSE: SSD), an industry lea

July 31, 2024 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 25, 2024 Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Commis

July 22, 2024 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 22, 2024 Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Commis

July 22, 2024 EX-99.1

SIMPSON MANUFACTURING CO., INC. ANNOUNCES 2024 SECOND QUARTER FINANCIAL RESULTS

Exhibit 99.1 Press Release dated July 22, 2024 SIMPSON MANUFACTURING CO., INC. ANNOUNCES 2024 SECOND QUARTER FINANCIAL RESULTS Pleasanton, CA – July 22, 2024 l Net sales of $597.0 million l Income from operations of $132.2 million, resulting in operating income margin of 22.1% l Net income per diluted share of $2.31 l Repurchased $50.0 million of common stock during the quarter Simpson Manufacturi

July 15, 2024 EX-99

Financial statements for the Simpson Manufacturing Co., Inc. 401(k) Profit Sharing Plan for the fiscal year ended December 31, 2023

Exhibit 99.1 SIMPSON MANUFACTURING CO., INC. 401(k) PROFIT SHARING PLAN Financial Statements and Supplemental Information As of December 31, 2023 and 2022 and for the Year Ended December 31, 2023 (With Report of Independent Registered Public Accounting Firm Thereon) TABLE OF CONTENTS Page No. Report of Independent Registered Public Accounting Firm 1 Statements of Net Assets Available for Benefits

July 15, 2024 11-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 11-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 11-K (Mark One) ý ANNUAL REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2023 OR o TRANSITION REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 1-13429 A. Full title of the plan and

July 1, 2024 NT 11-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 12b-25 SEC FILE NUMBER 1-13429 (Check One) ☐ Form 10-K ☐ Form 20-F ☑ Form 11-K ☐ Form 10-Q ☐ Form 10-D ☐ Form N-SAR ☐ Form N-CSR For Period Ended: December 31, 2023 ☐ Transition Report on Form 10-K ☐ Transition Report on Form 20-F ☐ Transition Report on Form 11-K ☐ Transition Report on Form 10-Q ☐ Transition Report on For

May 29, 2024 SD

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdict

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Commission file number) (I.R.S. Employer Identification No.) 5956 W. Las Positas Boulevard, Pleasanton, CA 94588 (Address of pr

May 15, 2024 EX-99.1

STRONG FOUNDATION. STRONGER FUTURE. Simpson Manufacturing Co., Inc. Investor Presentation May 2024 Exhibit 99.1 2 Safe Harbor This presentation contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of

exhibit991ssdinvestorpre STRONG FOUNDATION. STRONGER FUTURE. Simpson Manufacturing Co., Inc. Investor Presentation May 2024 Exhibit 99.1 2 Safe Harbor This presentation contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amend

May 15, 2024 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 15, 2024 Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Commiss

May 7, 2024 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended: March 31, 2024 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 1-13429 Simpson Ma

May 6, 2024 EX-10.1

Incorporated by reference to Exhibit 10.1 of the Company's Current Report on Form 8-K filed on May 6, 2024).

EXHIBIT 10.1 SIMPSON MANUFACTURING CO., INC. EXECUTIVE SEVERANCE PLAN 1. Scope. This Simpson Manufacturing Co., Inc. Executive Severance Plan (the “Plan”) applies to (A) the officers and other employees of Simpson Manufacturing Co., Inc. (the “Company”) and its subsidiaries who, from time to time, hold the titles and/or positions set forth on Exhibit A to this Plan, as such exhibit may be updated

May 6, 2024 EX-99.1

Simpson Manufacturing Co., Inc. 5956 W. Las Positas Boulevard Pleasanton, CA 94588 Phone: 800.925.5099 Fax: 925.847.1597 www.simpsonmfg.com Exhibit 99.1 NEWS RELEASE FOR IMMEDIATE RELEASE Simpson Manufacturing Co. Announces Retirement of Executive Vi

Simpson Manufacturing Co., Inc. 5956 W. Las Positas Boulevard Pleasanton, CA 94588 Phone: 800.925.5099 Fax: 925.847.1597 www.simpsonmfg.com Exhibit 99.1 NEWS RELEASE FOR IMMEDIATE RELEASE Simpson Manufacturing Co. Announces Retirement of Executive Vice President, North America Sales, Roger Dankel Pleasanton, CA – May 6, 2024 –Simpson Manufacturing Co., Inc. (the “Company”) (NYSE: SSD), an industry

May 6, 2024 EX-3.1

Certificate of Amendment of Certificate of Incorporation of Simpson Manufacturing Co., Inc. (Incorporated by reference to Exhibit 3.1 of the Company's Current Report on Form 8-K filed on May 6, 2024).

Exhibit 3.1 CERTIFICATE OF AMENDMENT OF CERTIFICATE OF INCORPORATION OF SIMPSON MANUFACTURING CO., INC. The name of the corporation (hereinafter called the “Corporation”) is Simpson Manufacturing Co., Inc., a corporation organized and existing under the General Corporation Law of the State of Delaware, hereby certifies that: 1. This Certificate of Amendment (the “Certificate of Amendment”) amends

May 6, 2024 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year, Financial Statements and Exhibits, Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 1, 2024 Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Commissi

April 22, 2024 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 22, 2024 Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Commi

April 22, 2024 EX-99.1

SIMPSON MANUFACTURING CO., INC. ANNOUNCES 2024 FIRST QUARTER FINANCIAL RESULTS

Exhibit 99.1 Press Release dated April 22, 2024 SIMPSON MANUFACTURING CO., INC. ANNOUNCES 2024 FIRST QUARTER FINANCIAL RESULTS Pleasanton, CA – April 22, 2024 l Net sales of $530.6 million l Income from operations of $96.1 million l Net income per diluted share of $1.77 Simpson Manufacturing Co., Inc. (the “Company”) (NYSE: SSD), an industry leader in engineered structural connectors and building

March 19, 2024 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.

March 19, 2024 DEF 14A

COURTESY PDF

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.

March 19, 2024 ARS

To our stockholders, customers, and employees For more than 67 years, Simpson Strong-Tie has dedicated itself to our company mission of helping people design and build safer, stronger structures. 2 Simpson Manufacturing Co., Inc. This mission aligns

To our stockholders, customers, and employees For more than 67 years, Simpson Strong-Tie has dedicated itself to our company mission of helping people design and build safer, stronger structures.

March 19, 2024 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.) Filed by the Registrant ☒ Filed by a Party other than the Registrant  

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.

March 11, 2024 SC 13G/A

SSD / Simpson Manufacturing Co., Inc. / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 12)* Name of issuer: Simpson Manufacturing Co Inc Title of Class of Securities: Common Stock CUSIP Number: 829073105 Date of Event Which Requires Filing of this Statement: February 29, 2024 Check the appropriate box to designate the rule pursuant to which this Schedule i

March 8, 2024 PRE 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.

March 6, 2024 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 6, 2024 Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Commis

March 6, 2024 EX-99.1

STRONG FOUNDATION. STRONGER FUTURE. Simpson Manufacturing Co., Inc. Investor Presentation March 2024 Exhibit 99.1 2 Safe Harbor This presentation contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act o

STRONG FOUNDATION. STRONGER FUTURE. Simpson Manufacturing Co., Inc. Investor Presentation March 2024 Exhibit 99.1 2 Safe Harbor This presentation contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. Forward-looking sta

February 28, 2024 EX-10.5

Simpson Manufacturing Co., Inc. Executive Officer Cash Profit Sharing Plan, as amended through March 17, 2017 is

01435\040\7834857.v11 SIMPSON MANUFACTURING CO., INC. EXECUTIVE OFFICER CASH PROFIT SHARING PLAN Adopted on January 14, 2003 and first amended through February 25, 2008 (hereafter referred to as the “Original Plan”), and subsequently amended through October 19, 2016 and February 4, 2017 (hereafter referred to as this “Plan”) Purpose The purpose of this Plan is to recognize outstanding effort and a

February 28, 2024 EX-97

, effective as of July 28, 202

1 Compensation Recovery Policy of Simpson Manufacturing Co., Inc. Effective date: July 28, 2023 1. Introduction and Purpose The Board of Directors (the "Board") of Simpson Manufacturing Co., Inc. (the "Company") believes that it is in the best interests of the Company and its stockholders to create and maintain a culture that emphasizes integrity and accountability and that reinforces the Company'

February 28, 2024 EX-10.13

Form of Simpson Manufacturing Co., Inc. 2024 Time Based Restricted Stock Unit Agreement is f

1 | P a g e Error! Unknown document property name. 2024 TIME-BASED RESTRICTED STOCK UNIT AGREEMENT Company: Simpson Manufacturing Co., Inc. Recipient: Recipient is set forth on the award acceptance page on Fidelity Stock Plan Services LLC Acceptance Page https://www.netbenefits.com, which is incorporated by reference to this Agreement. The Number of Shares of Common Stock Subject to RSUs Granted H

February 28, 2024 EX-10.12

Form of Simpson Manufacturing Co., Inc. 202

1 | P a g e 2024 PERFORMANCE-BASED RESTRICTED STOCK UNIT AGREEMENT Company: Simpson Manufacturing Co.

February 28, 2024 EX-21

List of Subsidiaries of the Registrant is filed herewith

Exhibit 21 Simpson Manufacturing Co., Inc. and Subsidiaries List of Subsidiaries of Simpson Manufacturing Co., Inc. At February 27, 2024 1. Simpson Strong-Tie Company Inc., a California corporation 2. Simpson Strong-Tie International, Inc., a California corporation 3. Simpson Strong-Tie Canada, Limited, a Canadian corporation 4. Simpson Strong-Tie Europe EURL, a French corporation 5. Simpson Stron

February 28, 2024 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ☒ Annual Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the fiscal year ended December 31, 2023 OR ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the transition period from to . Commission file number: 1-13429 Simpson Manufa

February 13, 2024 SC 13G/A

SSD / Simpson Manufacturing Co., Inc. / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SC 13G/A 1 tv01926-simpsonmanufacturing.htm SCHEDULE 13G/A SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 11)* Name of issuer: Simpson Manufacturing Co Inc Title of Class of Securities: Common Stock CUSIP Number: 829073105 Date of Event Which Requires Filing of this Statement: December 29, 2023 Check the appropriate

February 13, 2024 SC 13G/A

SSD / Simpson Manufacturing Co., Inc. / KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLC Passive Investment

SC 13G/A 1 fp0086862-46sc13ga.htm UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULE 13d-1(b), (c), AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13d-2(b) (AMENDMENT NO. 5)* SIMPSON MANUFACTURING CO., INC. (Name of Issuer) Common Stock (Title of Class of Securities) 829073105 (CUSIP Number) De

February 5, 2024 EX-99.1

SIMPSON MANUFACTURING CO., INC. ANNOUNCES 2023 FOURTH QUARTER AND FULL-YEAR FINANCIAL RESULTS

Exhibit 99.1 Press Release dated February 5, 2024 SIMPSON MANUFACTURING CO., INC. ANNOUNCES 2023 FOURTH QUARTER AND FULL-YEAR FINANCIAL RESULTS Pleasanton, CA – February 5, 2024 - l Fourth quarter net sales of $501.7 million increased 5.5% year-over-year l 2023 net sales of $2.2 billion increased 4.6% year-over-year l 2023 net income per diluted share of $8.26 increased 6.5% year-over-year l Decla

February 5, 2024 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 5, 2024 Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Com

December 5, 2023 EX-99.1

STRONG FOUNDATION. STRONGER FUTURE. Simpson Manufacturing Co., Inc. 2023 Off-Season Engagement Exhibit 99.1 This presentation contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, Section 27A

exhibit9912023off-seaso STRONG FOUNDATION. STRONGER FUTURE. Simpson Manufacturing Co., Inc. 2023 Off-Season Engagement Exhibit 99.1 This presentation contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. Forward-looking

December 5, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): December 4, 2023 Simpson Manufact

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): December 4, 2023 Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Com

November 8, 2023 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 8, 2023 Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Com

November 8, 2023 EX-99.1

STRONG FOUNDATION. STRONGER FUTURE. Simpson Manufacturing Co., Inc. Investor Presentation November 2023 EXHIBIT 99.1 2 Safe Harbor This presentation contains forward-looking statements within the meaning of the Private Securities Litigation Reform Ac

STRONG FOUNDATION. STRONGER FUTURE. Simpson Manufacturing Co., Inc. Investor Presentation November 2023 EXHIBIT 99.1 2 Safe Harbor This presentation contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. Forward-looking

November 7, 2023 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended: September 30, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 1-13429 Simpso

October 23, 2023 EX-99.1

SIMPSON MANUFACTURING CO., INC. ANNOUNCES 2023 THIRD QUARTER FINANCIAL RESULTS

Exhibit 99.1 Press Release dated October 23, 2023 SIMPSON MANUFACTURING CO., INC. ANNOUNCES 2023 THIRD QUARTER FINANCIAL RESULTS Pleasanton, CA – October 23, 2023 l Net sales of $580.1 million increased 4.8% year-over-year l Income from operations of $140.2 million increased 14.2% year-over-year l Diluted earnings per share of $2.43 increased 18.0% year-over-year l Declared $0.27 per share quarter

October 23, 2023 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 23, 2023 Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Com

October 19, 2023 8-K

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 19, 2023 Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Com

October 12, 2023 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 6, 2023 Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Comm

October 11, 2023 8-K

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 10, 2023 Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Com

October 2, 2023 SD

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdict

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Commission file number) (I.R.S. Employer Identification No.) 5956 W. Las Positas Boulevard, Pleasanton, CA 94588 (Address of pr

September 6, 2023 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): September 6, 2023 Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Co

September 6, 2023 EX-99.1

STRONG FOUNDATION. STRONGER FUTURE. Simpson Manufacturing Co., Inc. Investor Presentation September 2023 Exhibit 99.1 2 Safe Harbor This presentation contains forward-looking statements within the meaning of the Private Securities Litigation Reform A

STRONG FOUNDATION. STRONGER FUTURE. Simpson Manufacturing Co., Inc. Investor Presentation September 2023 Exhibit 99.1 2 Safe Harbor This presentation contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, Section 27A of the Securities Act of 1933, as amended, and Section 2IE of the Securities Exchange Act of 1934, as amended. Forward-looking

August 7, 2023 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended: June 30, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 1-13429 Simpson Man

July 24, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 24, 2023 Simpson Manufacturi

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 24, 2023 Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Commis

July 24, 2023 EX-99.1

SIMPSON MANUFACTURING CO., INC. ANNOUNCES 2023 SECOND QUARTER FINANCIAL RESULTS

Exhibit 99.1 Press Release dated July 24, 2023 SIMPSON MANUFACTURING CO., INC. ANNOUNCES 2023 SECOND QUARTER FINANCIAL RESULTS Pleasanton, CA – July 24, 2023 l Net sales of $597.6 million increased 0.7% year-over-year l Income from operations of $145.0 million increased 9.0% year-over-year l Diluted earnings per share of $2.50 increased 15.7% year-over-year Simpson Manufacturing Co., Inc. (the “Co

June 28, 2023 EX-99.1

Financial statements for the Simpson Manufacturing Co., Inc. 401(k) Profit Sharing Plan for the fiscal year ended December 31, 2022

Exhibit 99.1 SIMPSON MANUFACTURING CO., INC. 401(k) PROFIT SHARING PLAN Financial Statements and Supplemental Information As of December 31, 2022 and 2021 and for the Year Ended December 31, 2022 (With Report of Independent Registered Public Accounting Firm Thereon) TABLE OF CONTENTS Page No. Report of Independent Registered Public Accounting Firm 1 Statements of Net Assets Available for Benefits

June 28, 2023 11-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 11-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 11-K (Mark One) ý ANNUAL REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2022 OR o TRANSITION REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 1-13429 A. Full title of the plan and

June 5, 2023 8-K

Regulation FD Disclosure, Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 1, 2023 Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Commiss

June 5, 2023 EX-99.1

Simpson Manufacturing Co., Inc. 5956 W. Las Positas Boulevard Pleasanton, CA 94588 Phone: 800.925.5099 Fax: 925.847.1597 www.simpsonmfg.com NEWS RELEASE FOR IMMEDIATE RELEASE SIMPSON MANUFACTURING CO., INC. ANNOUNCES THE APPOINTMENT OF CHAU BANKS AND

exhibit991newdirectors-c Simpson Manufacturing Co., Inc. 5956 W. Las Positas Boulevard Pleasanton, CA 94588 Phone: 800.925.5099 Fax: 925.847.1597 www.simpsonmfg.com NEWS RELEASE FOR IMMEDIATE RELEASE SIMPSON MANUFACTURING CO., INC. ANNOUNCES THE APPOINTMENT OF CHAU BANKS AND FELICA CONEY TO ITS BOARD OF DIRECTORS Pleasanton, CA – June 5, 2023 – Simpson Manufacturing Co., Inc. (the “Company”) (NYSE

May 8, 2023 S-8

As filed with the Securities and Exchange Commission on May 8, 2023

As filed with the Securities and Exchange Commission on May 8, 2023 Registration No.

May 8, 2023 EX-FILING FEES

Filing Fee Table

Exhibit 107 CALCULATION OF FILING FEE TABLE FORM S-8 (Form Type) SIMPSON MANUFACTURING CO.

May 8, 2023 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended: March 31, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 1-13429 Simpson Ma

May 8, 2023 EX-4.3

is incorporated by reference to Exhibit 4.3 of the

exhibit43simpsonmanufact NAI-1534620122v4 SIMPSON MANUFACTURING CO., INC. NONQUALIFIED PLAN (Effective April 3, 2023) Exhibit 4.3 NAI-1534620122v4 SIMPSON MANUFACTURING CO., INC. NONQUALIFIED PLAN Simpson Manufacturing Co., Inc. (the “Company”) hereby adopts the Simpson Manufacturing Co., Inc. Nonqualified Plan (the “Plan”) to read as set forth herein. ARTICLE I PREFACE SECTION 1.1 Effective Date.

May 1, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 26, 2023 Simpson Manufactur

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 26, 2023 Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Commi

April 24, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 24, 2023 Simpson Manufactur

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 24, 2023 Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Commi

April 24, 2023 EX-99.1

SIMPSON MANUFACTURING CO., INC. ANNOUNCES 2023 FIRST QUARTER FINANCIAL RESULTS

Exhibit 99.1 Press Release dated April 24, 2023 SIMPSON MANUFACTURING CO., INC. ANNOUNCES 2023 FIRST QUARTER FINANCIAL RESULTS Pleasanton, CA – April 24, 2023 l Net sales of $534.4 million increased 8.3% year-over-year l Income from operations of $118.4 million decreased 4.9% year-over-year l Diluted earnings per share of $2.05 decreased 6.0% year-over-year Simpson Manufacturing Co., Inc. (the “Co

March 21, 2023 EX-99.1

STRONG FOUNDATION. STRONGER FUTURE. Simpson Manufacturing Co., Inc. Investor Presentation March 2023 2 Safe Harbor This presentation contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, Secti

ssdinvestorpresentation- STRONG FOUNDATION. STRONGER FUTURE. Simpson Manufacturing Co., Inc. Investor Presentation March 2023 2 Safe Harbor This presentation contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, Section 27A of the Securities Act of 1933, as amended, and Section 2IE of the Securities Exchange Act of 1934, as amended. Forward

March 21, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 21, 2023 Simpson Manufactur

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 21, 2023 Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Commi

March 16, 2023 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.   )

TABLE OF CONTENTS UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.

March 16, 2023 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.   )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.

March 14, 2023 EX-3.1 1

Amended and Restated Bylaws of Simpson Manufacturing Co., Inc. (marked to show changes to former Bylaws)

exhibit311bylaws-smcomar EXHIBIT 3.1.1 AMENDED AND RESTATED BYLAWS OF SIMPSON MANUFACTURING CO., INC. (AS AMENDED THROUGH MARCH 8, 202328, 2017) ARTICLE I Section 1. Registered Office The initial registered office of the Corporation in Delaware shall be The Corporation Trust Company, 1209 Orange Street, in the City of Wilmington, County of New Castle, 19801. Section 2. Additional Offices The Corpo

March 14, 2023 EX-3.1

Amended and Restated Bylaws of Simpson Manufacturing Co., Inc., as amended (Incorporated by reference to Exhibit 3.1 of the Company's Current Report on Form 8-K filed on March 14, 2023).

exhibit31bylaws-smco0320 EXHIBIT 3.1 AMENDED AND RESTATED BYLAWS OF SIMPSON MANUFACTURING CO., INC. (AS AMENDED THROUGH MARCH 8, 2023) ARTICLE I Section 1. Registered Office The initial registered office of the Corporation in Delaware shall be The Corporation Trust Company, 1209 Orange Street, in the City of Wilmington, County of New Castle, 19801. Section 2. Additional Offices The Corporation may

March 14, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 8, 2023 Simpson Manufacturi

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 8, 2023 Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Commis

February 28, 2023 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ☒ Annual Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the fiscal year ended December 31, 2022 OR ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the transition period from to . Commission file number: 1-13429 Simpson Manufa

February 28, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 21, 2023 Simpson Manufac

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 21, 2023 Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Co

February 28, 2023 EX-21

st of Subsidiaries of the Registrant is filed here

Exhibit 21 Simpson Manufacturing Co., Inc. and Subsidiaries List of Subsidiaries of Simpson Manufacturing Co., Inc. At February 28, 2023 1.Simpson Strong-Tie Company Inc., a California corporation 2.Simpson Strong-Tie International, Inc., a California corporation 3.Simpson Strong-Tie Canada, Limited, a Canadian corporation 4.Simpson Strong-Tie Europe EURL, a French corporation 5.Simpson Strong-Tie

February 14, 2023 SC 13G/A

SSD / Simpson Manufacturing Co, Inc. / KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLC - NONE Passive Investment

SC 13G/A 1 doc1.htm NONE UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 4)* SIMPSON MANUFACTURING CO., INC. (Name of Issuer) Common Stock (Title of Class of Securities) 829073105 (CUSIP Number) December 31, 2022 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designat

February 9, 2023 SC 13G/A

SSD / Simpson Manufacturing Co, Inc. / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SC 13G/A 1 tv01896-simpsonmanufacturing.htm SCHEDULE 13G/A SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 10)* Name of issuer: Simpson Manufacturing Co. Inc. Title of Class of Securities: Common Stock CUSIP Number: 829073105 Date of Event Which Requires Filing of this Statement: December 30, 2022 Check the appropriat

February 6, 2023 EX-99.1

SIMPSON MANUFACTURING CO., INC. ANNOUNCES 2022 FOURTH QUARTER AND FULL-YEAR FINANCIAL RESULTS

Exhibit 99.1 Press Release dated February 6, 2023 SIMPSON MANUFACTURING CO., INC. ANNOUNCES 2022 FOURTH QUARTER AND FULL-YEAR FINANCIAL RESULTS Pleasanton, CA – February 6, 2023 - l Fourth quarter net sales of $475.6 million increased 13.6% year-over-year l 2022 net sales of $2.12 billion increased 34.5% year-over-year l 2022 net income per diluted share of $7.76 increased 26.8% year-over-year l D

February 6, 2023 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 6, 2023 Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Com

December 28, 2022 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): December 28, 2022 Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Co

December 28, 2022 EX-99.1

Simpson Manufacturing Co., Inc. 5956 W. Las Positas Boulevard Pleasanton, CA 94588 Phone: 800.925.5099 Fax: 925.847.1597 www.simpsonmfg.com EXHIBIT 99.1 NEWS RELEASE FOR IMMEDIATE RELEASE Simpson Manufacturing Co., Inc. Announces Executive Officer Up

Simpson Manufacturing Co., Inc. 5956 W. Las Positas Boulevard Pleasanton, CA 94588 Phone: 800.925.5099 Fax: 925.847.1597 www.simpsonmfg.com EXHIBIT 99.1 NEWS RELEASE FOR IMMEDIATE RELEASE Simpson Manufacturing Co., Inc. Announces Executive Officer Updates Pleasanton, CA ? December 28, 2022 ? Simpson Manufacturing Co., Inc. (the ?Company?) (NYSE: SSD), an industry leader in engineered structural co

December 20, 2022 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): December 14, 2022 Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Co

December 9, 2022 SC 13G/A

SSD / Simpson Manufacturing Co, Inc. / KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLC - NONE Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 03)* SIMPSON MANUFACTURING CO., INC. (Name of Issuer) Common Stock (Title of Class of Securities) 829073105 (CUSIP Number) November 30, 2022 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to w

December 5, 2022 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): December 5, 2022 Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Com

December 5, 2022 EX-99.1

STRONG FOUNDATION. STRONGER FUTURE. Simpson Manufacturing Co., Inc. 2022 Off-Season Engagement Exhibit 99.1 This presentation contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, Section 27A

STRONG FOUNDATION. STRONGER FUTURE. Simpson Manufacturing Co., Inc. 2022 Off-Season Engagement Exhibit 99.1 This presentation contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, Section 27A of the Securities Act of 1933, as amended, and Section 2IE of the Securities Exchange Act of 1934, as amended. Forward-looking statements generally ca

November 8, 2022 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 7, 2022 Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Com

November 8, 2022 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended: September 30, 2022 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 1-13429 Simpso

November 8, 2022 EX-99.1

STRONG FOUNDATION. STRONGER FUTURE. Simpson Manufacturing Co., Inc. Investor Presentation November 2022 EXHIBIT 99.1 2 Safe Harbor This presentation contains forward-looking statements within the meaning of the Private Securities Litigation Reform Ac

STRONG FOUNDATION. STRONGER FUTURE. Simpson Manufacturing Co., Inc. Investor Presentation November 2022 EXHIBIT 99.1 2 Safe Harbor This presentation contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, Section 27A of the Securities Act of 1933, as amended, and Section 2IE of the Securities Exchange Act of 1934, as amended. Forward-looking

October 24, 2022 EX-99.1

SIMPSON MANUFACTURING CO., INC. ANNOUNCES 2022 THIRD QUARTER FINANCIAL RESULTS

Exhibit 99.1 Press Release dated October 24, 2022 SIMPSON MANUFACTURING CO., INC. ANNOUNCES 2022 THIRD QUARTER FINANCIAL RESULTS Pleasanton, CA ? October 24, 2022 l Net sales of $553.7 million increased 39.6% year-over-year l Income from operations of $122.8 million increased 22.1% year-over-year l Diluted earnings per share of $2.06 increased 20.8% year-over-year l Repurchased $28.3 million of th

October 24, 2022 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 24, 2022 Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Com

September 20, 2022 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): September 20, 2022 Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (C

September 20, 2022 EX-99.1

STRONG FOUNDATION. STRONGER FUTURE. Simpson Manufacturing Co., Inc. Investor Presentation September 2022 EXHIBIT 99.1 2 Safe Harbor This presentation contains forward-looking statements within the meaning of the Private Securities Litigation Reform A

STRONG FOUNDATION. STRONGER FUTURE. Simpson Manufacturing Co., Inc. Investor Presentation September 2022 EXHIBIT 99.1 2 Safe Harbor This presentation contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, Section 27A of the Securities Act of 1933, as amended, and Section 2IE of the Securities Exchange Act of 1934, as amended. Forward-looking

September 8, 2022 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): September 5, 2022 Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Co

September 8, 2022 EX-99.1

Simpson Manufacturing Co., Inc. 5956 W. Las Positas Boulevard Pleasanton, CA 94588 Phone: 800.925.5099 Fax: 925.847.1597 www.simpsonmfg.com Exhibit 99.1 NEWS RELEASE FOR IMMEDIATE RELEASE Simpson Announces CEO Retirement and Succession Plan  Karen C

exhibit991pressrelease-c Simpson Manufacturing Co., Inc. 5956 W. Las Positas Boulevard Pleasanton, CA 94588 Phone: 800.925.5099 Fax: 925.847.1597 www.simpsonmfg.com Exhibit 99.1 NEWS RELEASE FOR IMMEDIATE RELEASE Simpson Announces CEO Retirement and Succession Plan  Karen Colonias to step down as CEO on December 31, 2022, and retire from the Company on June 30, 2023  Michael Olosky to succeed Ka

August 25, 2022 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 25, 2022 Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Comm

August 25, 2022 EX-99.1

STRONG FOUNDATION. STRONGER FUTURE. Simpson Manufacturing Co., Inc. Investor Presentation August 2022 EXHIBIT 99.1 2 Safe Harbor This presentation contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act

STRONG FOUNDATION. STRONGER FUTURE. Simpson Manufacturing Co., Inc. Investor Presentation August 2022 EXHIBIT 99.1 2 Safe Harbor This presentation contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, Section 27A of the Securities Act of 1933, as amended, and Section 2IE of the Securities Exchange Act of 1934, as amended. Forward-looking st

August 10, 2022 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended: June 30, 2022 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 1-13429 Simpson Man

July 25, 2022 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 25, 2022 Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Commis

July 25, 2022 EX-99.1

SIMPSON MANUFACTURING CO., INC. ANNOUNCES 2022 SECOND QUARTER FINANCIAL RESULTS

Exhibit 99.1 Press Release dated July 25, 2022 SIMPSON MANUFACTURING CO., INC. ANNOUNCES 2022 SECOND QUARTER FINANCIAL RESULTS Pleasanton, CA ? July 25, 2022 l Net sales of $593.2 million increased 44.6% year-over-year l Income from operations of $133.1 million increased 30.8% year-over-year l Diluted earnings per share of $2.16 increased 30.1% year-over-year l Repurchased $25.0 million of the Com

June 30, 2022 EX-99.1

Financial statements for the Simpson Manufacturing Co., Inc. 401(k) Profit Sharing Plan for the fiscal year ended December 31, 202

Exhibit 99.1 SIMPSON MANUFACTURING CO., INC. 401(k) PROFIT SHARING PLAN Financial Statements and Supplemental Information As of December 31, 2021 and 2020 and for the Year Ended December 31, 2021 (With Report of Independent Registered Public Accounting Firm Thereon) TABLE OF CONTENTS Page No. Report of Independent Registered Public Accounting Firm 1 Statements of Net Assets Available for Benefits

June 30, 2022 11-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 11-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 11-K (Mark One) ? ANNUAL REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2021 OR o TRANSITION REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 1-13429 A. Full title of the plan and

June 23, 2022 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 23, 2022 Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Commis

June 23, 2022 EX-99.1

STRONG FOUNDATION. STRONGER FUTURE. Simpson Manufacturing Co., Inc. Investor Presentation June 2022 Exhibit 99.1 2 Safe Harbor This presentation contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of

STRONG FOUNDATION. STRONGER FUTURE. Simpson Manufacturing Co., Inc. Investor Presentation June 2022 Exhibit 99.1 2 Safe Harbor This presentation contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, Section 27A of the Securities Act of 1933, as amended, and Section 2IE of the Securities Exchange Act of 1934, as amended. Forward-looking stat

June 17, 2022 EX-99.3

Simpson Manufacturing Co., Inc. UNAUDITED PRO FORMA CONDENSED COMBINED FINANCIAL INFORMATION

Exhibit 99.3 Simpson Manufacturing Co., Inc. UNAUDITED PRO FORMA CONDENSED COMBINED FINANCIAL INFORMATION On April 1, 2022, Simpson Manufacturing Co., Inc. (together with its subsidiaries, ?Simpson? or the ?Company?) completed its previously announced acquisition of FIXCO Invest S.A.S, (together with its subsidiaries, "Etanco" or the ?Acquisition?) for a purchase price of $805.4 million, net of ca

June 17, 2022 EX-99.2

Unaudited Interim Condensed Consolidated Statement of Operations

Exhibit 99.2 FIXCO Invest S.A.S. Unaudited Interim Condensed Consolidated Balance Sheet As of March 31, 2021 and September 30, 2021 (In thousands, unaudited) Notes March 31, 2021 September 30, 2021 Net value Gross values Amortization Depreciation Net value Goodwill 6.10 ? 182,431 ? 182,575 ? - ? 182,575 Intangible assets 6.11 128,355 146,042 (20,231) 125,811 Property, plant and equipment 6.12 41,7

June 17, 2022 8-K/A

Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K/A CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 1, 2022 Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Comm

June 17, 2022 EX-99.1

Independent Auditors’ Report

Exhibit 99.1 Independent Auditors? Report To the President of FIXCO Invest S.A.S., We have audited the accompanying consolidated financial statements of FIXCO Invest S.A.S. and its subsidiaries, which comprise the consolidated balance sheets as at March 31, 2021 and 2020, and the related consolidated statements of operations, stockholders? equity, and cash flows for the years then ended, and the r

May 31, 2022 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 31, 2022 Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Commiss

May 31, 2022 EX-99.1

STRONG FOUNDATION. STRONGER FUTURE. Simpson Manufacturing Co., Inc. Investor Presentation May 2022 EXHIBIT 99.1 2 Safe Harbor This presentation contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of

STRONG FOUNDATION. STRONGER FUTURE. Simpson Manufacturing Co., Inc. Investor Presentation May 2022 EXHIBIT 99.1 2 Safe Harbor This presentation contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, Section 27A of the Securities Act of 1933, as amended, and Section 2IE of the Securities Exchange Act of 1934, as amended. Forward-looking state

May 13, 2022 SD

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdict

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Commission file number) (I.R.S. Employer Identification No.) 5956 W. Las Positas Boulevard, Pleasanton, CA 94588 (Address of pr

May 9, 2022 8-K

Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 4, 2022 Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Commissi

May 6, 2022 EX-10.2

Amendment No. 1 to the Securities Purchase Agreement by and between Simpson Strong-Tie Europe, Simpson Manufacturing Co., Inc., on the other hand, and the sellers identified therein, on the other hand, with respect to Fixco Invest, dated March 17, 2022 is incorporated by reference to Exhibit 10.2 of the Company's Quarterly Report on Form 10-Q for the quarter ended

EUI-1213168084v2 AMENDMENT AGREEMENT N?1 TO THE SECURITIES PURCHASE AGREEMENT DATED JANUARY 26, 2022 BY AND BETWEEN SIMPSON STRONG-TIE EUROPE SIMPSON MANUFACTURING CO.

May 6, 2022 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended: March 31, 2022 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 1-13429 Simpson Ma

April 25, 2022 EX-99.1

SIMPSON MANUFACTURING CO., INC. ANNOUNCES 2022 FIRST QUARTER FINANCIAL RESULTS

Exhibit 99.1 Press Release dated April 25, 2022 SIMPSON MANUFACTURING CO., INC. ANNOUNCES 2022 FIRST QUARTER FINANCIAL RESULTS Pleasanton, CA ? April 25, 2022 l Net sales of $493.6 million increased 42.0% year-over-year l Gross margin of 48.0% increased from 46.7% in the prior year period l Income from operations of $124.4 million increased 82.0% year-over-year; operating margin of 25.2% increased

April 25, 2022 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 25, 2022 Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Commi

April 7, 2022 EX-99.1

EXHIBIT 99.1 FOR IMMEDIATE RELEASE April 7, 2022 Simpson Manufacturing Co., Inc. Completes Acquisition of ETANCO Group PLEASANTON, Calif., April 7, 2022 /PRNewswire/ — Simpson Manufacturing Co., Inc. (the "Company" or “Simpson”) (NYSE:SSD), an indust

exhibit991-pressrelease EXHIBIT 99.1 FOR IMMEDIATE RELEASE April 7, 2022 Simpson Manufacturing Co., Inc. Completes Acquisition of ETANCO Group PLEASANTON, Calif., April 7, 2022 /PRNewswire/ — Simpson Manufacturing Co., Inc. (the "Company" or “Simpson”) (NYSE:SSD), an industry leader in engineered structural connectors and building solutions, today announced the successful completion of its previou

April 7, 2022 8-K

Financial Statements and Exhibits, Completion of Acquisition or Disposition of Assets, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 1, 2022 Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Commis

April 4, 2022 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 30, 2022 Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Commi

April 4, 2022 EX-10.1

Amended and Restated Credit Agreement among the Company, the subsidiaries of the Company party thereto as guarantors, the lenders party thereto, Wells Fargo Bank, National Association, as administrative agent, and the other parties party thereto is incorporated by reference to Exhibit 10.1 of the Company's Current Report on Form 8-K filed April 4, 2022

Execution Version Published CUSIP Number: 82907CAE5 Revolving Facility CUSIP Number: 82907CAF2 Term Loan CUSIP Number: 82907CAG0 1548129988 AMENDED AND RESTATED CREDIT AGREEMENT dated as of March 30, 2022 among SIMPSON MANUFACTURING CO.

March 23, 2022 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.   )

TABLE OF CONTENTS UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.

March 23, 2022 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.   )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.

March 8, 2022 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 8, 2022 Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Commis

March 8, 2022 EX-99.1

STRONG FOUNDATION. STRONGER FUTURE. Simpson Manufacturing Co., Inc. Investor Presentation March 2022 EXHIBIT 99.1 2 This presentation contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, Sect

STRONG FOUNDATION. STRONGER FUTURE. Simpson Manufacturing Co., Inc. Investor Presentation March 2022 EXHIBIT 99.1 2 This presentation contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, Section 27A of the Securities Act of 1933, as amended, and Section 2IE of the Securities Exchange Act of 1934, as amended. Forward-looking statements gene

February 28, 2022 EX-21

List of Subsidiaries of the Registrant is filed herewith

Exhibit 21 Simpson Manufacturing Co., Inc. and Subsidiaries List of Subsidiaries of Simpson Manufacturing Co., Inc. At February 25, 2022 1.Simpson Strong-Tie Company Inc., a California corporation 2.Simpson Strong-Tie International, Inc., a California corporation 3.Simpson Strong-Tie Canada, Limited, a Canadian corporation 4.Simpson Strong-Tie Europe EURL, a French corporation 5.Simpson Strong-Tie

February 28, 2022 EX-10.9

Form of Simpson Manufacturing Co., Inc. Director Time Based Restricted Stock Unit Agreement is

EXHIBIT 10.9 76 2022 DIRECTOR TIME-BASED RESTRICTED STOCK UNIT AGREEMENT Company: Simpson Manufacturing Co., Inc. Recipient: The recipient?s name (the ?Recipient?) is set forth on the Recipient?s online award acceptance page on Fidelity Stock Plan Services LLC website (the ?Acceptance Page?) at https://www.netbenefits.com, which is incorporated by reference to this Agreement. The Number of Shares

February 28, 2022 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ? Annual Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the fiscal year ended December 31, 2021 OR ? Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the transition period from to . Commission file number: 1-13429 Simpson Manufa

February 28, 2022 EX-11.11

Form of Simpson Manufacturing Co., Inc. 2022 Time Based Restricted Stock Unit Agreement is incorporated by reference to Exhibit 10.11 of its Annual Report on Form 10-K dated February 28, 2022

EXHIBIT 10.11 90 2022 TIME BASED RESTRICTED STOCK UNIT AGREEMENT Company: Simpson Manufacturing Co., Inc. Recipient: The recipient?s name (the ?Recipient?) is set forth on the Recipient?s online award acceptance page on Fidelity Stock Plan Services LLC website (the ?Acceptance Page?) at https://www.netbenefits.com, which is incorporated by reference to this Agreement. The Number of Shares of Commo

February 28, 2022 EX-10.10

Form of Simpson Manufacturing Co., Inc. 2022 Performance Based Restricted Stock Unit Agreement is incorporated by reference to Exhibit 10.10 of its Annual Report on Form 10-K dated February 28, 2022

EXHIBIT 10.10 82 2022 PERFORMANCE-BASED RESTRICTED STOCK UNIT AGREEMENT Company: Simpson Manufacturing Co., Inc. Recipient: The recipient?s name (the ?Recipient?) is set forth on the Recipient?s online award acceptance page on Fidelity Stock Plan Services LLC website (the ?Acceptance Page?) at https://www.netbenefits.com, which is incorporated by reference to this Agreement. Target PSU Shares: The

February 17, 2022 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 17, 2022 Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Co

February 17, 2022 EX-99.1

STRONG FOUNDATION. STRONGER FUTURE. Simpson Manufacturing Co., Inc. 2022 Off-Season Engagement Exhibit 99.1 This presentation contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, Section 27A

STRONG FOUNDATION. STRONGER FUTURE. Simpson Manufacturing Co., Inc. 2022 Off-Season Engagement Exhibit 99.1 This presentation contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, Section 27A of the Securities Act of 1933, as amended, and Section 2 IE of the Securities Exchange Act of 1934, as amended. Forward-looking statements generally c

February 14, 2022 SC 13G/A

SSD / Simpson Manufacturing Co, Inc. / KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLC - NONE Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 2)* SIMPSON MANUFACTURING CO., INC. (Name of Issuer) Common Stock (Title of Class of Securities) 829073105 (CUSIP Number) December 31, 2021 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to wh

February 10, 2022 SC 13G/A

SSD / Simpson Manufacturing Co, Inc. / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 9)* Name of issuer: Simpson Manufacturing Co. Inc. Title of Class of Securities: Common Stock CUSIP Number: 829073105 Date of Event Which Requires Filing of this Statement: December 31, 2021 Check the appropriate box to designate the rule pursuant to which this Schedule

February 7, 2022 EX-99.1

SIMPSON MANUFACTURING CO., INC. ANNOUNCES 2021 FOURTH QUARTER AND FULL-YEAR FINANCIAL RESULTS

EX-99.1 2 q42021ex991pressrelease.htm EX-99.1 Exhibit 99.1 Press Release dated February 7, 2022 SIMPSON MANUFACTURING CO., INC. ANNOUNCES 2021 FOURTH QUARTER AND FULL-YEAR FINANCIAL RESULTS Pleasanton, CA – February 7, 2022 - l Fourth quarter net sales of $418.6 million increased 42.4% year-over-year l Fourth quarter net income per diluted share of $1.61 increased 136.8% year-over-year l Declared

February 7, 2022 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 7, 2022 Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Com

January 31, 2022 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): January 26, 2022 Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Com

January 31, 2022 EX-2.1

ies Purchase Agreement by and between Simpson Strong-Tie Eu

SECURITIES PURCHASE AGREEMENT BY AND BETWEEN SIMPSON STRONG-TIE EUROPE SIMPSON MANUFACTURING CO.

January 26, 2022 8-K

Regulation FD Disclosure, Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): January 20, 2022 Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Com

January 26, 2022 EX-99.1

Simpson Manufacturing Co., Inc. 5956 W. Las Positas Boulevard Pleasanton, CA 94588 Phone: 800.925.5099 Fax: 925.847.1597 www.simpsonmfg.com NEWS RELEASE FOR IMMEDIATE RELEASE Mike Olosky Promoted to President and Chief Operating Officer of Simpson Ma

EX-99.1 2 ssdmikeoloskypromotionpr.htm EX-99.1 Simpson Manufacturing Co., Inc. 5956 W. Las Positas Boulevard Pleasanton, CA 94588 Phone: 800.925.5099 Fax: 925.847.1597 www.simpsonmfg.com NEWS RELEASE FOR IMMEDIATE RELEASE Mike Olosky Promoted to President and Chief Operating Officer of Simpson Manufacturing Co., Inc. Pleasanton, CA – January 26, 2022 – Simpson Manufacturing Co., Inc. (the “Company

January 10, 2022 EX-99.1

STRONG FOUNDATION. STRONGER FUTURE. Simpson Manufacturing Co., Inc. 2022 Off-Season Engagement Exhibit 99.1 This presentation contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, Section 27A

STRONG FOUNDATION. STRONGER FUTURE. Simpson Manufacturing Co., Inc. 2022 Off-Season Engagement Exhibit 99.1 This presentation contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, Section 27A of the Securities Act of 1933, as amended, and Section 2 IE of the Securities Exchange Act of 1934, as amended. Forward looking statements generally c

January 10, 2022 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): January 10, 2022 Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Com

January 10, 2022 EX-99.2

STRONG FOUNDATION. STRONGER FUTURE. Simpson Manufacturing Co., Inc. Investor Presentation January 2022 Exhibit 99.2 2 This presentation contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, Se

STRONG FOUNDATION. STRONGER FUTURE. Simpson Manufacturing Co., Inc. Investor Presentation January 2022 Exhibit 99.2 2 This presentation contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, Section 27A of the Securities Act of 1933, as amended, and Section 2 IE of the Securities Exchange Act of 1934, as amended. Forward-looking statements g

December 29, 2021 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): December 29, 2021 Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Co

December 29, 2021 EX-99.1

1 Exhibit 99.1 NEWS RELEASE FOR IMMEDIATE RELEASE SIMPSON MANUFACTURING CO., INC. ANNOUNCES BINDING OFFER TO ACQUIRE ETANCO GROUP  Submits binding offer to acquire leading European building product solutions company, for purchase price of €725 milli

EX-99.1 2 exhibit991-pressrelease1.htm EX-99.1 1 Exhibit 99.1 NEWS RELEASE FOR IMMEDIATE RELEASE SIMPSON MANUFACTURING CO., INC. ANNOUNCES BINDING OFFER TO ACQUIRE ETANCO GROUP  Submits binding offer to acquire leading European building product solutions company, for purchase price of €725 million (approximately $818 million(1))  Expands market position, geographical reach and portfolio of build

December 29, 2021 EX-99.2

STRONG FOUNDATION. STRONGER FUTURE. Simpson Manufacturing Co., Inc. Binding Offer to Acquire Etanco Group December 29, 2021 Exhibit 99.2 2 This presentation contains forward-looking statements within the meaning of the Private Securities Litigation R

STRONG FOUNDATION. STRONGER FUTURE. Simpson Manufacturing Co., Inc. Binding Offer to Acquire Etanco Group December 29, 2021 Exhibit 99.2 2 This presentation contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. Forward- looking statements generally can be identified by words such as "anticipate," "believe," "estimate," "expect," "intend," "

December 14, 2021 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): December 14, 2021 Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Co

December 14, 2021 EX-99.1

STRONG FOUNDATION. STRONGER FUTURE. Simpson Manufacturing Co., Inc. 2021 Off-Season Engagement Exhibit 99.1 This presentation contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, Section 27A

STRONG FOUNDATION. STRONGER FUTURE. Simpson Manufacturing Co., Inc. 2021 Off-Season Engagement Exhibit 99.1 This presentation contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, Section 27A of the Securities Act of 1933, as amended, and Section 2 IE of the Securities Exchange Act of 1934, as amended. Forward-looking statements generally c

November 10, 2021 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 10, 2021 Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Co

November 10, 2021 EX-99.1

STRONG FOUNDATION. STRONGER FUTURE. Simpson Manufacturing Co., Inc. Investor Presentation November 2021 Exhibit 99.1 2 This presentation contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, S

STRONG FOUNDATION. STRONGER FUTURE. Simpson Manufacturing Co., Inc. Investor Presentation November 2021 Exhibit 99.1 2 This presentation contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, Section 27A of the Securities Act of 1933, as amended, and Section 2 IE of the Securities Exchange Act of 1934, as amended. Forward-looking statements

November 4, 2021 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended: September 30, 2021 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 1-13429 Simpso

November 4, 2021 EX-32.0

Section 1350 Certifications are furnished herewith

Exhibit 32 Simpson Manufacturing Co., Inc. and Subsidiaries Section 1350 Certifications The undersigned, Karen Colonias and Brian J. Magstadt, being the duly elected and acting Chief Executive Officer and Chief Financial Officer, respectively, of Simpson Manufacturing Co., Inc., a Delaware corporation (the “Company”), hereby certify that the quarterly report of the Company on Form 10-Q for the qua

October 25, 2021 EX-99.1

SIMPSON MANUFACTURING CO., INC. ANNOUNCES 2021 THIRD QUARTER FINANCIAL RESULTS

Exhibit 99.1 Press Release dated October 25, 2021 SIMPSON MANUFACTURING CO., INC. ANNOUNCES 2021 THIRD QUARTER FINANCIAL RESULTS Pleasanton, CA ? October 25, 2021 l Quarterly net sales of $396.7 million, an increase of 8.9% year-over-year l Gross margin of 49.9% increased from 47.6% in the prior year period l Quarterly income from operations of $100.6 million, an increase of 10.2% year-over-year;

October 25, 2021 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 25, 2021 Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Com

September 27, 2021 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): September 22, 2021 Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (C

August 6, 2021 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended: June 30, 2021 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 1-13429 Simpson Man

July 26, 2021 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 26, 2021 Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Commis

July 26, 2021 EX-99.1

SIMPSON MANUFACTURING CO., INC. ANNOUNCES 2021 SECOND QUARTER FINANCIAL RESULTS

Exhibit 99.1 Press Release dated July 26, 2021 SIMPSON MANUFACTURING CO., INC. ANNOUNCES 2021 SECOND QUARTER FINANCIAL RESULTS Pleasanton, CA ? July 26, 2021 l Quarterly net sales of $410.3 million, an increase of 25.8% year-over-year l Gross margin of 47.9% increased from 45.9% in the prior year period l Quarterly income from operations of $101.7 million, an increase of 40.9% year-over-year; oper

July 14, 2021 EX-10.1

Fourth Amendment to Credit Agreement, dated as of July 12, 2021, among the Company, as Borrower, Simpson Strong-Tie Company Inc. and Simpson Strong-Tie International, Inc., as Guarantors, the several financial institutions party to the Agreement, as Lenders, and Well Fargo Bank, National Association, in its separate capacities as Swing Line Lender, L/C Issuer and as Administrative Agent.

EX-10.1 2 exhibit101.htm EX-10.1 EXHIBIT 10.1 (PART 1) - 1 - SMRH:4814-6933-7836.5 FOURTH AMENDMENT TO CREDIT AGREEMENT This FOURTH AMENDMENT TO CREDIT AGREEMENT (“Fourth Amendment”) is entered into as of July 12, 2021, among SIMPSON MANUFACTURING CO., INC., a Delaware corporation, as borrower (“Borrower”), the Guarantors party to the Credit Agreement (as defined below), the Lenders party to the C

July 14, 2021 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 12, 2021 Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Commis

June 22, 2021 8-K

Regulation FD Disclosure, Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 21, 2021 Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Commis

June 22, 2021 EX-99.1

Simpson Manufacturing Co., Inc. 5956 W. Las Positas Boulevard Pleasanton, CA 94588 Phone: 800.925.5099 Fax: 925.847.1597 www.simpsonmfg.com NEWS RELEASE FOR IMMEDIATE RELEASE SIMPSON MANUFACTURING CO., INC. ANNOUNCES THE APPOINTMENT OF KENNETH KNIGHT

Simpson Manufacturing Co., Inc. 5956 W. Las Positas Boulevard Pleasanton, CA 94588 Phone: 800.925.5099 Fax: 925.847.1597 www.simpsonmfg.com NEWS RELEASE FOR IMMEDIATE RELEASE SIMPSON MANUFACTURING CO., INC. ANNOUNCES THE APPOINTMENT OF KENNETH KNIGHT TO ITS BOARD OF DIRECTORS Pleasanton, CA ? June 22, 2021 ? Simpson Manufacturing Co., Inc. (the ?Company?) (NYSE: SSD), an industry leader in enginee

June 21, 2021 11-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 11-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 11-K (Mark One) ? ANNUAL REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2020 OR o TRANSITION REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 1-13429 A. Full title of the plan and

June 21, 2021 EX-99.1

Financial statements for the Simpson Manufacturing Co., Inc. 401(k) Profit Sharing Plan for the fiscal year ended December 31, 2020

Exhibit 99.1 SIMPSON MANUFACTURING CO., INC. 401(k) PROFIT SHARING PLAN Financial Statements and Supplemental Information As of December 31, 2020 and 2019 and for the Year Ended December 31, 2020 (With Report of Independent Registered Public Accounting Firm Thereon) TABLE OF CONTENTS Page No. Report of Independent Registered Public Accounting Firm 1 Statements of Net Assets Available for Benefits

May 20, 2021 SD

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdict

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Commission file number) (I.R.S. Employer Identification No.) 5956 W. Las Positas Boulevard, Pleasanton, CA 94588 (Address of pr

May 14, 2021 EX-99.1

STRONG FOUNDATION. STRONGER FUTURE. Simpson Manufacturing Co., Inc. Investor Presentation May 2021 Exhibit 99.1 2 This presentation contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, Sectio

STRONG FOUNDATION. STRONGER FUTURE. Simpson Manufacturing Co., Inc. Investor Presentation May 2021 Exhibit 99.1 2 This presentation contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, Section 27A of the Securities Act of 1933, as amended, and Section 2 IE of the Securities Exchange Act of 1934, as amended. Forward-looking statements gener

May 14, 2021 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 14, 2021 Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Commiss

May 7, 2021 8-K

Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 4, 2021 Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Commissi

May 6, 2021 10-Q

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended: March 31, 2021 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 1-13429 Simpson Ma

April 26, 2021 EX-99.1

SIMPSON MANUFACTURING CO., INC. ANNOUNCES 2021 FIRST QUARTER FINANCIAL RESULTS

Exhibit 99.1 Press Release dated April 26, 2021 SIMPSON MANUFACTURING CO., INC. ANNOUNCES 2021 FIRST QUARTER FINANCIAL RESULTS Pleasanton, CA ? April 26, 2021 l Net sales of $347.6 million increased 22.6% year-over-year l Gross margin of 46.7% increased from 45.7% in the prior year period l Income from operations of $68.4 million increased 38.6% year-over-year, operating margin of 19.7% increased

April 26, 2021 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 26, 2021 Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Commi

March 23, 2021 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 23, 2021 Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Commi

March 23, 2021 DEF 14A

- DEF14A

TABLE OF CONTENTS UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.

March 23, 2021 DEFA14A

- DEFA14A

TABLE OF CONTENTS UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.

March 23, 2021 EX-99.1

STRONG FOUNDATION. STRONGER FUTURE. Simpson Manufacturing Co., Inc. Analyst & Investor Day March 23, 2021 Exhibit 99.1 2 Video Terry Hammons Senior Vice President, General Counsel and Corporate Secretary Work Better Together with Simpson Strong-Tie 3

STRONG FOUNDATION. STRONGER FUTURE. Simpson Manufacturing Co., Inc. Analyst & Investor Day March 23, 2021 Exhibit 99.1 2 Video Terry Hammons Senior Vice President, General Counsel and Corporate Secretary Work Better Together with Simpson Strong-Tie 3 Opening Remarks Terry Hammons Senior Vice President, General Counsel and Corporate Secretary 4 This presentation contains forward-looking statements

February 26, 2021 EX-10.8

Form of Simpson Manufacturing Co., Inc. Director Time Based Restricted Stock Unit Agreement is filed herewith.

Exhibit 10.8 2020 DIRECTOR TIME-BASED RESTRICTED STOCK UNIT AGREEMENT Company: Simpson Manufacturing Co., Inc. Recipient: The recipient?s name (the ?Recipient?) is set forth on the Recipient?s online award acceptance page on Morgan Stanley Smith Barney?s StockPlan Connect website (the ?Acceptance Page?) at https://www.stockplanconnect.com, which is incorporated by reference to this Agreement. The

February 26, 2021 EX-10.9

Form of Simpson Manufacturing Co., Inc. Performance Based Restricted Stock Unit Agreement is filed herewith.

Exhibit 10.9 2020 PERFORMANCE-BASED RESTRICTED STOCK UNIT AGREEMENT Company: Simpson Manufacturing Co., Inc. Recipient: The recipient?s name (the ?Recipient?) is set forth on the Recipient?s online award acceptance page on Morgan Stanley Smith Barney?s StockPlan Connect website (the ?Acceptance Page?) at https://www.stockplanconnect.com, which is incorporated by reference to this Agreement. Target

February 26, 2021 EX-10.10

Form of Simpson Manufacturing Co., Inc. Time Based Restricted Stock Unit Agreement is filed herewith.

Exhibit 10.10 2020 TIME-BASED RESTRICTED STOCK UNIT AGREEMENT Company: Simpson Manufacturing Co., Inc. Recipient: The recipient?s name (the ?Recipient?) is set forth on the Recipient?s online award acceptance page on Morgan Stanley Smith Barney?s StockPlan Connect website (the ?Acceptance Page?) at https://www.stockplanconnect.com, which is incorporated by reference to this Agreement. The Number o

February 26, 2021 10-K

Annual Report - 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ? Annual Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the fiscal year ended December 31, 2020 OR ? Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the transition period from to . Commission file number: 1-13429 Simpson Manufa

February 26, 2021 EX-21

List of Subsidiaries of the Registrant is filed herewith.

Exhibit 21 Simpson Manufacturing Co., Inc. and Subsidiaries List of Subsidiaries of Simpson Manufacturing Co., Inc. At February 25, 2021 1.Simpson Strong-Tie Company Inc., a California corporation 2.Simpson Strong-Tie International, Inc., a California corporation 3.Simpson Strong-Tie Canada, Limited, a Canadian corporation 4.Simpson Strong-Tie Europe EURL, a French corporation 5.Simpson Strong-Tie

February 11, 2021 SC 13G/A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 01)* SIMPSON MANUFACTURING CO., INC. (Name of Issuer) Common Stock (Title of Class of Securities) (CUSIP Num

Schedule 13G UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 01)* SIMPSON MANUFACTURING CO., INC. (Name of Issuer) Common Stock (Title of Class of Securities) 829073105 (CUSIP Number) December 31, 2020 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule

February 10, 2021 SC 13G/A

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 8)*

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 8)* Name of issuer: Simpson Manufacturing Co. Inc. Title of Class of Securities: Common Stock CUSIP Number: 829073105 Date of Event Which Requires Filing of this Statement: December 31, 2020 Check the appropriate box to designate the rule pursuant to which this Schedule

February 8, 2021 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 8, 2021 Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Com

February 8, 2021 EX-99.1

SIMPSON MANUFACTURING CO., INC. ANNOUNCES 2020 FOURTH QUARTER AND FULL-YEAR FINANCIAL RESULTS

Exhibit 99.1 Press Release dated February 8, 2021 SIMPSON MANUFACTURING CO., INC. ANNOUNCES 2020 FOURTH QUARTER AND FULL-YEAR FINANCIAL RESULTS Pleasanton, CA – February 8, 2021 - l Fourth quarter net sales of $293.9 million increased 12.0% year-over-year l Fourth quarter net income per diluted common share of $0.68 increased 7.9% year-over-year l Declared a $0.23 per share cash dividend l 2020 ne

November 16, 2020 EX-99.1

Off-Season Stockholder Engagement STRENGTH BUILT IN November | 2020 Safe Harbor This presentation contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, Section 27A of the Securities Act of 193

EX-99.1 2 a201112ssdxoffseasoninv.htm EX-99.1 Off-Season Stockholder Engagement STRENGTH BUILT IN November | 2020 Safe Harbor This presentation contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, Section 27A of the Securities Act of 1933, as amended, and Section 2 IE of the Securities Exchange Act of 1934, as amended. Forward-looking stat

November 16, 2020 8-K

Regulation FD Disclosure, Financial Statements and Exhibits - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 16, 2020 Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Co

November 9, 2020 8-K

Regulation FD Disclosure, Financial Statements and Exhibits - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 9, 2020 Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Com

November 9, 2020 EX-99.1

Karen Colonias CEO Brian Magstadt CFO STRENGTH BUILT IN November | 2020 Safe Harbor This presentation contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, Section 27A of the Securities Act of

simpsoninvestorspresenta Karen Colonias CEO Brian Magstadt CFO STRENGTH BUILT IN November | 2020 Safe Harbor This presentation contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, Section 27A of the Securities Act of 1933, as amended, and Section 2 IE of the Securities Exchange Act of 1934, as amended.

November 6, 2020 EX-32.0

Section 1350 Certifications are furnished herewith

Exhibit 32 Simpson Manufacturing Co., Inc. and Subsidiaries Section 1350 Certifications The undersigned, Karen Colonias and Brian J. Magstadt, being the duly elected and acting Chief Executive Officer and Chief Financial Officer, respectively, of Simpson Manufacturing Co., Inc., a Delaware corporation (the “Company”), hereby certify that the quarterly report of the Company on Form 10-Q for the qua

November 6, 2020 10-Q

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended: September 30, 2020 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 1-13429 Simpso

October 26, 2020 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 26, 2020 Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Com

October 26, 2020 EX-99.1

SIMPSON MANUFACTURING CO., INC. ANNOUNCES 2020 THIRD QUARTER FINANCIAL RESULTS

Exhibit 99.1 Press Release dated October 26, 2020 SIMPSON MANUFACTURING CO., INC. ANNOUNCES 2020 THIRD QUARTER FINANCIAL RESULTS Pleasanton, CA – October 26, 2020 - l Net sales of $364.3 million increased 17.5% year-over-year l Strong gross margin of 47.6% improved 3.2% year-over-year l Income from operations of $91.3 million increased 49.8% year-over-year, operating margin of 25.1% increased 5.4%

October 13, 2020 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits, Other Events - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 13, 2020 Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Com

October 13, 2020 EX-99.1

Exhibit 99.1 NEWS RELEASE FOR IMMEDIATE RELEASE SIMPSON MANUFACTURING CO., INC. ANNOUNCES MICHAEL OLOSKY AS CHIEF OPERATING OFFICER Pleasanton, CA – October 13, 2020 – Simpson Manufacturing Co., Inc. (the “Company”) (NYSE: SSD), an industry leader in

exhibit991ssdannouncesne Exhibit 99.1 NEWS RELEASE FOR IMMEDIATE RELEASE SIMPSON MANUFACTURING CO., INC. ANNOUNCES MICHAEL OLOSKY AS CHIEF OPERATING OFFICER Pleasanton, CA – October 13, 2020 – Simpson Manufacturing Co., Inc. (the “Company”) (NYSE: SSD), an industry leader in engineered structural connectors and building solutions, today announced Michael Olosky will be joining the Company as Chief

August 7, 2020 10-Q

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended: June 30, 2020 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 1-13429 Simpson Man

August 5, 2020 EX-99.1

Karen Colonias CEO Brian Magstadt CFO STRENGTH BUILT IN August | 2020 Safe Harbor This presentation contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, Section 27A of the Securities Act of 1

irpresentation082020 Karen Colonias CEO Brian Magstadt CFO STRENGTH BUILT IN August | 2020 Safe Harbor This presentation contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, Section 27A of the Securities Act of 1933, as amended, and Section 2 IE of the Securities Exchange Act of 1934, as amended.

August 5, 2020 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 4, 2020 Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Commi

July 27, 2020 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 27, 2020 Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Commis

July 27, 2020 EX-99.1

SIMPSON MANUFACTURING CO., INC. ANNOUNCES 2020 SECOND QUARTER FINANCIAL RESULTS

hibit 99.1 Press Release dated July 27, 2020 SIMPSON MANUFACTURING CO., INC. ANNOUNCES 2020 SECOND QUARTER FINANCIAL RESULTS Pleasanton, CA – July 27, 2020 - l Net sales of $326.1 million increased 7.0% year-over-year l Strong gross margin of 45.9% improved 1.9% year-over-year l Income from operations of $72.2 million increased 34.6% year-over-year, operating margin of 22.1% increased 4.5% year-ov

June 22, 2020 11-K

- 11-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 11-K (Mark One) ý ANNUAL REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2019 OR o TRANSITION REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 1-13429 A. Full title of the plan and

June 22, 2020 EX-99.1

Financial statements for the Simpson Manufacturing Co., Inc. 401(k) Profit Sharing Plan for the fiscal year ended December 31, 2019.

Exhibit 99.1 SIMPSON MANUFACTURING CO., INC. 401(k) PROFIT SHARING PLAN Financial Statements and Supplemental Schedules As of December 31, 2019 and 2018 and for the Year Ended December 31, 2019 (With Report of Independent Registered Public Accounting Firm Thereon) TABLE OF CONTENTS Page No. Report of Independent Registered Public Accounting Firm 1 Statements of Net Assets Available for Benefits 2

June 10, 2020 SC 13G/A

SSD / Simpson Manufacturing Co., Inc. / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 7)* Name of issuer: Simpson Manufacturing Co. Inc. Title of Class of Securities: Common Stock CUSIP Number: 829073105 Date of Event Which Requires Filing of this Statement: May 29, 2020 Check the appropriate box to designate the rule pursuant to which this Schedule is fi

May 27, 2020 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 21, 2020 Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Commiss

May 27, 2020 EX-10.1

Third Amendment to Credit Agreement, dated as of May 21, 2020, among the Company, as Borrower, Simpson Strong-Tie Company Inc. and Simpson Strong-Tie International, Inc., as Guarantors, the several financial institutions party to the Agreement, as Lenders, and Well Fargo Bank, National Association, in its separate capacities as Swing Line Lender and L/C Issuer and as Administrative Agent.

exhibit101thirdamendment EXHIBIT 10.1

May 15, 2020 SD

- SD

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Commission file number) (I.R.S. Employer Identification No.) 5956 W. Las Positas Boulevard, Pleasanton, CA 94588 (Address of pr

May 13, 2020 EX-99.1

Business Update COVID-19 PANDEMIC • Simpson deemed an essential business under • Health and safety of employees is top priority (1) the CISA exemption • High level of financial flexibility • All North America manufacturing and • Hiring freeze impleme

slide11investorpresentat Business Update COVID-19 PANDEMIC • Simpson deemed an essential business under • Health and safety of employees is top priority (1) the CISA exemption • High level of financial flexibility • All North America manufacturing and • Hiring freeze implemented distribution facilities remain open • Focus on cash preservation • Two manufacturing facilities in the U.

May 13, 2020 8-K/A

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K/A CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 12, 2020 Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Commi

May 12, 2020 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 11, 2020 Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Commiss

May 12, 2020 EX-99.1

Karen Colonias CEO Brian Magstadt CFO STRENGTH BUILT IN May | 2020 Safe Harbor This presentation contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, Section 27A of the Securities Act of 1933

smcoinvestorpresentation Karen Colonias CEO Brian Magstadt CFO STRENGTH BUILT IN May | 2020 Safe Harbor This presentation contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, Section 27A of the Securities Act of 1933, as amended, and Section 2 IE of the Securities Exchange Act of 1934, as amended.

May 7, 2020 10-Q

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended: March 31, 2020 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 1-13429 Simpson Ma

April 28, 2020 8-K

Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 23, 2020 Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Commi

April 27, 2020 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 27, 2020 Simpson Manufacturing Co., Inc. (Exact name of registrant as specified in its charter) Delaware 1-13429 94-3196943 (State or other jurisdiction of incorporation) (Commi

April 27, 2020 EX-99.1

SIMPSON MANUFACTURING CO., INC. ANNOUNCES 2020 FIRST QUARTER FINANCIAL RESULTS AND BUSINESS UPDATE IN RESPONSE TO COVID-19

Exhibit 99.1 Press Release dated April 27, 2020 SIMPSON MANUFACTURING CO., INC. ANNOUNCES 2020 FIRST QUARTER FINANCIAL RESULTS AND BUSINESS UPDATE IN RESPONSE TO COVID-19 Pleasanton, CA – April 27, 2020 - l Net sales of $283.7 million increased 9.4% year-over-year on stronger sales volumes l Strong gross margin of 45.7% improved 320 basis points year-over-year l Operating profit of $49.4 million i

March 24, 2020 EX-99.1

SIMPSON MANUFACTURING CO., INC. PROVIDES UPDATE IN RESPONSE TO COVID-19 AND ANNOUNCES VIRTUAL ANNUAL MEETING OF STOCKHOLDERS

Exhibit 99.1 SIMPSON MANUFACTURING CO., INC. PROVIDES UPDATE IN RESPONSE TO COVID-19 AND ANNOUNCES VIRTUAL ANNUAL MEETING OF STOCKHOLDERS Pleasanton, CA – March 24, 2020 – Simpson Manufacturing Co., Inc. (the “Company”) (NYSE: SSD), an industry leader in engineered structural connectors and building solutions, today provided the following corporate update in response to the COVID-19 pandemic. “The

March 24, 2020 DEFA14A

SSD / Simpson Manufacturing Co., Inc. DEFA14A - - DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.

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