WEYERHAEUSER CO (WY) · Insider Trading (Form 4) SEC Filing

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-06-03 10b5-1 Pre-arranged Plan: No --- Issuer --- Name: WEYERHAEUSER CO (WY) CIK: 0000106535 --- Reporting Owner --- Name: Chaney Brian K CIK: 0002024439 Role: Officer (Senior Vice President) --- Non-Derivative Transactions --- [Transaction #1] Security: Common Date: 2026-06-03 | Code: F (Payment of exercise/tax) Shares: -3,491 | Price: $24.39 Total Value: $85,145.49 Shares Owned After: 115,460.3145 | Ownership: D (Direct) Footnotes: [F1] These shares (rounded up to the nearest whole share) are being withheld to cover taxes for a restricted stock unit vesting. [F2] 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. --- Footnotes (Complete Index) --- F1: These shares (rounded up to the nearest whole share) are being withheld to cover taxes for a restricted stock unit vesting. F2: 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. --- Signature --- /s/ /s/ Jose J. Quintana, Attorney-in-fact for Brian K. Chaney (2026-06-04)