X0508 4 2026-02-03 0000106535 WEYERHAEUSER CO WY 0002024439 Chaney Brian K 220 OCCIDENTAL AVE SOUTH SEATTLE WA 98104 false true false false Senior Vice President false Common 2026-02-03 4 M false 11157 23.09 A 99995.242 D Common 2026-02-03 4 S false 11157 25.8167 D 88838.242 D Stock Option (right to buy) 23.09 2026-02-03 4 M false 11157 0 D 2017-02-09 2026-02-09 Common 11157 0 D Reported holdings include shares acquired since the Reporting Person's last filing on Form 4 from dividend reinvestment transactions exempt from Section 16 of the Securities Exchange Act of 1934, as amended. This transaction was executed in multiple trades at prices ranging from $25.79 to $25.85. The price reported herein reflects the weighted average sale price of all the trades. The Reporting Person hereby undertakes to provide upon request to the Commission staff, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. The option is fully vested. /s/ Jose J. Quintana, Attorney-in-fact for Brian K. Chaney 2026-02-04