X0508 4 2025-12-15 0000106535 WEYERHAEUSER CO WY 0001613252 Stockfish Devin W 220 OCCIDENTAL AVE SOUTH SEATTLE WA 98104 true true false false President and CEO true Common 2025-12-15 4 M false 90162 23.09 A 1115023.3064 D Common 2025-12-15 4 S false 90162 23.3316 D 1024861.3064 D Stock Option (right to buy) 23.09 2025-12-15 4 M false 90162 0 D 2017-02-09 2026-02-09 Common 90162 0 D The exercise of stock options and sale of underlying shares of common stock by the Reporting Person reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 22, 2024. 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 $23.290 to $23.545. 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 Devin W. Stockfish 2025-12-17