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

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-05-15 10b5-1 Pre-arranged Plan: No --- Issuer --- Name: WEYERHAEUSER CO (WY) CIK: 0000106535 --- Reporting Owner --- Name: Williams Kim CIK: 0001375725 Role: Director --- Non-Derivative Transactions --- [Transaction #1] Security: Common Date: 2026-05-15 | Code: A (Grant or award) Shares: +7,832 | Price: $0.00 Shares Owned After: 61,545 | Ownership: D (Direct) Footnotes: [F1] These shares were granted pursuant to a restricted stock unit award that vests 100% upon the earlier of the one-year anniversary of the grant date or the day prior to the company's next regular meeting of shareholders following the grant date. These shares (rounded down to the nearest whole share) represent the equity portion of the annual retainer fee in the amount of $180,000.00, with the number of restricted stock units determined by dividing the dollar amount of the fee by $22.98, the average of the high ($23.40) and low ($22.56) price of the Issuer's common stock on the date of the grant. Additional units accrue as and when dividends are paid on the Issuer's common stock. --- Derivative Transactions --- [Transaction #1] Security: Share Equivalents Date: 2026-05-15 | Code: A (Grant or award) Shares: +5,221.932 | Price: $22.98 Shares Owned After: 92,290.887 | Ownership: D (Direct) Footnotes: [F2] The stock equivalents reported herein were acquired pursuant to the Issuer's Fee Deferral Plan for Directors. The Reporting Person elected to defer the cash portion of the annual retainer fee in the amount of $120,000.00 into stock equivalents, with the number of stock equivalents determined by dividing the dollar amount of the fee by $22.98, the average of the high ($23.40) and low ($22.56) price of the Issuer's common stock on the date of the grant. Additional stock equivalents accrue as and when dividends are paid on the Issuer's common stock. Stock equivalents are paid in an equal number of shares of the Issuer's common stock upon the Reporting Person's termination of service as a director. [F2] The stock equivalents reported herein were acquired pursuant to the Issuer's Fee Deferral Plan for Directors. The Reporting Person elected to defer the cash portion of the annual retainer fee in the amount of $120,000.00 into stock equivalents, with the number of stock equivalents determined by dividing the dollar amount of the fee by $22.98, the average of the high ($23.40) and low ($22.56) price of the Issuer's common stock on the date of the grant. Additional stock equivalents accrue as and when dividends are paid on the Issuer's common stock. Stock equivalents are paid in an equal number of shares of the Issuer's common stock upon the Reporting Person's termination of service as a director. [F2] The stock equivalents reported herein were acquired pursuant to the Issuer's Fee Deferral Plan for Directors. The Reporting Person elected to defer the cash portion of the annual retainer fee in the amount of $120,000.00 into stock equivalents, with the number of stock equivalents determined by dividing the dollar amount of the fee by $22.98, the average of the high ($23.40) and low ($22.56) price of the Issuer's common stock on the date of the grant. Additional stock equivalents accrue as and when dividends are paid on the Issuer's common stock. Stock equivalents are paid in an equal number of shares of the Issuer's common stock upon the Reporting Person's termination of service as a director. [F2] The stock equivalents reported herein were acquired pursuant to the Issuer's Fee Deferral Plan for Directors. The Reporting Person elected to defer the cash portion of the annual retainer fee in the amount of $120,000.00 into stock equivalents, with the number of stock equivalents determined by dividing the dollar amount of the fee by $22.98, the average of the high ($23.40) and low ($22.56) price of the Issuer's common stock on the date of the grant. Additional stock equivalents accrue as and when dividends are paid on the Issuer's common stock. Stock equivalents are paid in an equal number of shares of the Issuer's common stock upon the Reporting Person's termination of service as a director. [F3] Reported holdings include stock equivalents 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 were granted pursuant to a restricted stock unit award that vests 100% upon the earlier of the one-year anniversary of the grant date or the day prior to the company's next regular meeting of shareholders following the grant date. These shares (rounded down to the nearest whole share) represent the equity portion of the annual retainer fee in the amount of $180,000.00, with the number of restricted stock units determined by dividing the dollar amount of the fee by $22.98, the average of the high ($23.40) and low ($22.56) price of the Issuer's common stock on the date of the grant. Additional units accrue as and when dividends are paid on the Issuer's common stock. F2: The stock equivalents reported herein were acquired pursuant to the Issuer's Fee Deferral Plan for Directors. The Reporting Person elected to defer the cash portion of the annual retainer fee in the amount of $120,000.00 into stock equivalents, with the number of stock equivalents determined by dividing the dollar amount of the fee by $22.98, the average of the high ($23.40) and low ($22.56) price of the Issuer's common stock on the date of the grant. Additional stock equivalents accrue as and when dividends are paid on the Issuer's common stock. Stock equivalents are paid in an equal number of shares of the Issuer's common stock upon the Reporting Person's termination of service as a director. F3: Reported holdings include stock equivalents 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 Kim Williams (2026-05-19)