ssd-20261006

Delaware

1-13429

94-3196943

(State or other jurisdiction of incorporation)

(Commission file number)

(I.R.S. Employer Identification No.)


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).

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. ☐

On October 6, 2026, Simpson Manufacturing Co., Inc. (the “Company”) is providing an operational and guidance timing update for the full year ending December 31, 2026.

This update reflects a shift in the anticipated closing timeline of the unimproved land in Stockton, California. Due to administrative procedures, the transaction which was originally scheduled to close in the third quarter of 2026, actually closed in the fourth quarter of 2026. Consequently, the net gain on disposal and its effect on income from operations will be recognized in the fourth quarter, rather than the third.

While the timing of the sale and the associated recognition of the net gain have shifted into the fourth quarter, the Company's full-year 2026 financial guidance ranges remain unchanged.

The information furnished pursuant to this Item 7.01 shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as expressly set forth by specific reference in such a filing.

The information furnished pursuant to this Item 7.01 contains “forward-looking statements” within the meaning of the safe harbor provisions of the federal securities laws. It should be read in conjunction with the “Safe Harbor” statement contained in the Investor Presentation, the risk factors included in the Company’s periodic reports filed with the Securities and Exchange Commission and the other public announcements that the Company may make, by press release or otherwise, from time to time.

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:

October 6, 2026

/s/Matt Dunn

Matt Dunn

Chief Financial Officer


Exhibit No.						Description

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