Item 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers Item 5.07: Submission of Matters to a Vote of Security Holders Item 9.01: Financial Statements and Exhibits Signatures EXHIBIT 10.1 Weyerhaeuser Company 2026 Deferred Compensation Plan EXHIBIT 104 Cover page interactive data file (embedded within the inline XBRL document). Table of Contents Section 5 – Corporate Governance and Management Item 5.02 . Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers (e) On May 14, 2026, the Weyerhaeuser Company ("Weyerhaeuser" or the "Company") amended and restated the Weyerhaeuser Company 2023 Deferred Compensation Plan. Pursuant to the plan, designated employee participants, including the company’s executive officers, may defer between 10 and 50 percent of base salary and between 10 and 100 percent of cash incentive awards for payment at a future date. Participants may defer base salary into an interest-bearing cash account and cash incentive awards into either an interest-bearing cash account or an account denominated in stock equivalents. Prior to the amendment and restatement of the plan, amounts deferred into stock equivalent accounts were credited with a premium determined each year by the Compensation Committee; the primary purpose of the amendment and restatement of the plan was to eliminate the premium for stock equivalent deferrals and related provisions. The amended and restated plan will govern deferrals and distributions of amounts earned in 2027 and subsequent years. The foregoing descriptions of the Deferred Compensation Plan are not intended to be complete and are qualified in their entirety by reference to the Deferred Compensation Plan filed herewith as Exhibit 10.1. Item 5.07. Submission of Matters to a Vote of Security Holders The Weyerhaeuser Annual Meeting of Shareholders was held on May 15, 2026. There were 721,042,609 shares of common stock entitled to be voted at the meeting, of which 661,779,414 were represented in person or by proxy. Proxies were solicited pursuant to Regulation 14A under the Securities Exchange Act of 1934, as amended, to vote on the following three items of business: Proposal 1, the election of 11 nominees to the Weyerhaeuser board of directors; Proposal 2, the annual advisory vote to approve the compensation of Weyerhaeuser’s named executive officers; and Proposal 3, the vote to ratify the appointment of KPMG as Weyerhaeuser’s independent auditors. Following are the final voting results, as certified by the Company’s inspector of elections: Proposal 1 . Shareholders elected the directors listed below to the board of directors. Nominee Votes For Votes Against Votes to Abstain Broker Non-Votes Rick Beckwitt 601,579,952 1,806,741 2,835,060 55,557,661 Mark A. Emmert 582,307,732 21,038,507 2,875,514 55,557,661 Rick R. Holley 571,842,423 31,553,194 2,826,136 55,557,661 Sara Grootwassink Lewis 589,512,682 13,915,633 2,793,438 55,557,661 Deidra C. Merriwether 594,329,726 9,102,248 2,789,779 55,557,661 Al Monaco 599,244,950 4,150,151 2,826,652 55,557,661 James C. O'Rourke 599,208,885 4,184,988 2,827,880 55,557,661 Nicole W. Piasecki 563,333,024 40,090,218 2,798,511 55,557,661 Lawrence A. Selzer 595,484,646 7,887,287 2,849,820 55,557,661 Devin W. Stockfish 597,268,432 6,120,607 2,832,714 55,557,661 Kim Williams 566,670,020 36,747,028 2,804,705 55,557,661 Proposal 2 . Shareholders approved, on an advisory and non-binding basis, the compensation of Weyerhaeuser’s named executive officers for fiscal year 2026, as disclosed in the company's definitive proxy materials. Votes For Votes Against Votes to Abstain Broker Non-Votes 571,085,106 31,062,169 4,074,478 55,557,661 Proposal 3 . Shareholders ratified the selection and appointment of KPMG LLP as Weyerhaeuser’s independent auditors for fiscal year 2026. Votes For Votes Against Votes to Abstain Broker Non-Votes 627,597,889 33,482,606 698,919 0 Table of Contents Weyerhaeuser’s next annual meeting of shareholders is scheduled to take place on May 14, 2027. Table of Contents Section 9 – Financial Statements and Exhibits Item 9.01 . Financial Statements and Exhibits (d) Exhibits . The following items are filed as exhibits with this report. Exhibit No. Description 10.1 Weyerhaeuser Company 2026 Deferred Compensation Plan 104 Cover page interactive data file (embedded within the inline XBRL document) Table of Contents SIGNA TURES Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. WEYERHAEUSER COMPANY By: /s/ Kristy T. Harlan Name: Kristy T. Harlan Its: Senior Vice President, General Counsel and Corporate Secretary Date: May 20, 2026