Simpson Manufacturing Co., Inc. — Director's Dealing 2025

Feb 20, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Simpson Manufacturing Co., Inc. (SSD)
CIK: 0000920371
Period of Report: 2025-02-18

Reporting Person: Gilstrap Jeremy (EVP, Innovation)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2025-02-18	Common Stock	A	463	—	Acquired	10485	Direct
2025-02-18	Common Stock	F	191	$174.28	Disposed	10294	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	1244	Indirect

Footnotes

F1: At the election of the Reporting Person, a portion of the shares of common stock acquired pursuant to this filing have been deferred under the Simpson Manufacturing Co., Inc. Nonqualified Plan (the "Plan") and will settle on a future date selected by the Reporting Person at the time of his or her deferral election.

F2: Represents performance stock units granted in January 2022, for which the performance and vesting periods ended December 31, 2024, and for which the settlement date was February 18, 2025.

F3: Represents shares of common stock withheld by the Company to satisfy the tax withholding obligation for the reporting person's performance stock units that settled on February 18, 2025, and restricted stock units that vested on February 18, 2025.

F4: Includes 1,919 restricted stock units that have not yet vested and 999 shares of common stock deferred under the Plan which will settle pursuant to the applicable terms of the Reporting Person's deferral election.

F5: The shares are owned by the Simpson Manufacturing Co., Inc. Profit Sharing Plan for Salaried Employees (the "Plan") of which the reporting person is a participant. The Plan qualifies under sections 401(a)(26) and 410 of the Internal Revenue Code.