WEYERHAEUSER CO

INFORMATION REQUIRED PURSUANT TO FORM 8-K

The following disclosures are provided in compliance with Item 5.02(e) of Form 8-K.

On February 13, 2026, the company’s board of directors approved certain amendments to the Weyerhaeuser Company Amended and Restated Annual Incentive Plan for Salaried Employees. The plan, which sets forth the general terms and conditions for the annual cash incentive bonus for employees, including the company’s executive officers, was amended and restated primarily to give the compensation committee of the board of directors greater flexibility to establish performance goals and to clarify management’s authority with respect to non-executive officer plan participant bonus awards.

In accordance with Item 9.01(d) of Form 8-K, a copy of the Weyerhaeuser Company Amended and Restated Annual Incentive Plan for Salaried Employees, as amended and restated effective as of February 13, 2026, is filed as Exhibit 10(u) to this annual report on Form 10-K.

The foregoing description of the Weyerhaeuser Company Amended and Restated Annual Incentive Plan for Salaried Employees, as amended and restated effective as of February 13, 2026, is a general description only, does not purport to be complete and is qualified in its entirety by reference to the plan, which is filed as an exhibit to this annual report on Form 10-K and is incorporated herein by reference.

INSIDER TRADING ARRANGEMENTS

During fourth quarter 2025, no director or officer (as defined in Rule 16a-1(f) of the Exchange Act) of the company adopted, modified or terminated a trading plan intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) of the Exchange Act or a non-Rule 10b5-1 trading arrangement.