Form 8-K

8-K — Simpson Manufacturing Co., Inc.

Accession: 0001628280-26-035954

Filed: 2026-05-18

Period: 2026-05-06

CIK: 0000920371

SIC: 3420 (CUTLERY, HANDTOOLS & GENERAL HARDWARE)

Item: Submission of Matters to a Vote of Security Holders

Item: Financial Statements and Exhibits

Documents

8-K — ssd-20260506.htm (Primary)

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8-K

8-K (Primary)

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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, 2026

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 principal executive offices)

(Registrant’s telephone number, including area code): (925) 560-9000

Securities registered pursuant to Section 12(b) of the Act:

Title of Each Class Trading Symbol Name of Each Exchange on Which Registered

Common Stock, par value $0.01 per share SSD New York Stock Exchange

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-2)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240. 13e-4(c))

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR §240.12b-2).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 5.07 Submission of Matters to a Vote of Security Holders

On May 6, 2026, the Company held its Annual Meeting of Stockholders (the “Annual Meeting”). At the Annual Meeting, the Company’s stockholders voted on the three proposals set forth below. A more detailed description of each proposal is set forth in the Company’s Proxy Statement filed with the Securities and Exchange Commission on March 24, 2026.

Proposal 1: To elect eight directors, each to hold office until the Company's 2027 annual meeting of stockholders or until their successors are duly qualified and elected.

Proposal 2: To approve, on an advisory basis, the compensation of the Company’s named executive officers.

Proposal 3: To ratify the selection of Grant Thornton LLP as the Company’s independent registered public accounting firm for the 2026 fiscal year.

At the close of business on March 11, 2026, the record date for the Annual Meeting, there were 41,194,018 shares of the Company’s common stock outstanding and entitled to vote at the Annual Meeting (“Common Stock”). As the holders of 38,752,780 shares of Common Stock, having a majority of the votes that could be cast by the holders of all outstanding shares of Common Stock, were represented in person or by proxy at the Annual Meeting, a quorum was present.

Each of the foregoing proposals was adopted and approved by the stockholders at the Annual Meeting. The number of votes cast for or against, as well as abstentions and broker non-votes, if applicable, with respect to each of Proposals 1- 3 presented at the Annual Meeting, including a separate tabulation with respect to each director nominee for office are set forth below:

Proposal 1: Election of Directors.

Broker

For Against Abstain Non-Votes

James Andrasick 36,731,368 576,424 37,323 1,407,665

Chau Banks 36,967,419 356,164 21,532 1,407,665

Felica Coney 37,281,551 30,150 33,414 1,407,665

Philip Donaldson 37,206,780 117,141 21,194 1,407,665

Angela Drake 37,177,599 145,503 22,013 1,407,665

Celeste Volz Ford 36,700,436 621,885 22,794 1,407,665

Kenneth Knight 37,295,980 15,608 33,527 1,407,665

Michael Olosky 37,018,648 287,307 39,160 1,407,665

As a result, the eight individuals were elected by the stockholders as directors of the Company, each to hold office until the Company's 2027 annual meeting of stockholders or until his or her successor has been duly qualified and elected.

Proposal 2: Approval, on an advisory basis, of the compensation of the Company’s named executive officers.

FOR AGAINST ABSTAIN BROKER NON-VOTES

36,669,378 644,944 30,793 1,407,665

As a result, the compensation paid to the Company's named executive officers as disclosed in the Company’s proxy statement for the Annual Meeting was approved by the stockholders.

Proposal 3: Ratification of the selection of Grant Thornton LLP as the Company’s independent registered public accounting firm for 2026.

FOR AGAINST ABSTAIN BROKER NON-VOTES

38,577,835 116,705 58,240 0

As a result, the selection of Grant Thornton LLP by the Company's board of directors as the Company's independent registered public accounting firm for the fiscal year ending December 31, 2026 was ratified by the stockholders.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits

Exhibit No. Description

104 Cover Page Interactive Data File (embedded within the XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Simpson Manufacturing Co., Inc.

(Registrant)

DATE: May 18, 2026 By /s/ Cassandra Payton

Cassandra Payton

Executive Vice President, General Counsel

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Simpson Manufacturing Co., Inc.

Entity Incorporation, State or Country Code

Entity File Number

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Entity Tax Identification Number

94-3196943

Entity Address, Address Line One

5956 W. Las Positas Boulevard

Entity Address, City or Town

Pleasanton

Entity Address, State or Province

Entity Address, Postal Zip Code

94588

City Area Code

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Local Phone Number

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