Weyerhaeuser

(e) On January 19, 2022, the Compensation Committee of the Weyerhaeuser Company Board of Directors approved new forms of terms and conditions for future performance share unit awards and restricted stock unit awards that may be granted to executive officers under the Weyerhaeuser Company 2013 Long-Term Incentive Plan. Copies of the new forms of performance share unit award terms and conditions and restricted stock unit award terms and conditions are filed as Exhibit 10.1 and Exhibit 10.2, respectively, to this report and incorporated herein by reference. Section 9 - Financial Statements and Exhibits

(b) On August 13, 2021, the board of directors of Weyerhaeuser Company (“Weyerhaeuser”) was formally notified that Adrian M. Blocker will retire as Weyerhaeuser’s senior vice president of Timberlands effective September 13, 2021. Travis A. Keatley, who currently serves as Weyerhaeuser’s vice president of Western Timberlands, will succeed Mr. Blocker as senior vice president of Timberlands effective the same date as Mr. Blocker’s retirement from his position. On August 18, 2021, Weyerhaeuser issued a press release announcing the changes to its senior leadership team described in this

Signatures Table of Contents Section 5 – Corporate Governance and Management

(b), (c) On February 11, 2021, the board of directors of Weyerhaeuser Company (“Weyerhaeuser” or the “Company”) appointed Nancy S. Loewe, 53, as Weyerhaeuser’s senior vice president and chief financial officer, to become effective March 8, 2021. She will replace Russell Hagen who, as previously disclosed, will assume the position of senior vice president and chief development officer effective March 8, 2021. Jim Kilberg, the Company’s senior vice president of Real Estate, Energy and Natural Resources, will retire effective March 1, 2021. Ms. Loewe has more than 20 years of financial and operating experience across multiple industries, having served most recently as the senior vice president of finance for Visa, Inc., a financial services corporation, from March 2019 to March 2021.

(e) On January 20, 2021, the Compensation Committee of the Weyerhaeuser Company Board of Directors approved new forms of terms and conditions for future performance share unit awards and restricted stock unit awards that may be granted to executive officers under the Weyerhaeuser Company 2013 Long-Term Incentive Plan. Copies of the new forms of performance share unit award terms and conditions and restricted stock unit award terms and conditions are filed as Exhibit 10.1 and Exhibit 10.2 respectively to this report and incorporated herein by reference. Section 9 - Financial Statements and Exhibits

(d) The board of directors of Weyerhaeuser Company (the "Company") has appointed Deidra “Dee” C. Merriwether to serve as a new director of the Company effective November 12, 2020, replacing a board member retiring in 2021. Ms. Merriwether has not yet been named to a board committee. In connection with her appointment, the number of directors constituting the board of directors of the Company was increased from eleven to twelve. Ms. Merriwether is the senior vice president of North American Sales and Services at W.W. Grainger, Inc., North America’s leading broad line supplier of maintenance, repair and operating products, with operations primarily in North America, Japan and Europe and 2019 sales of $11.5 billion. She has led Grainger’s North American sales organization, which represents the largest portion of Grainger’s overall business, since 2020.

(b) Weyerhaeuser Company (the " Company ") has announced future leadership and organizational changes. Russell Hagen, the Company’s senior vice president and chief financial officer, will transition from his current position and become senior vice president and chief development officer, overseeing the company’s Real Estate, Energy & Natural Resources segment and its Acquisitions and Divestitures and Business Development teams. Mr. Hagen will assume his new role effective upon the appointment of his successor as chief financial officer, which is expected to occur in late 2020 or early 2021. Jim Kilberg, the Company’s senior vice president of Real Estate, Energy and Natural Resources, will retire in early 2021.

(d) Weyerhaeuser Company (the "Company") is filing this amendment to its Current Report on Form 8-K filed on February 18, 2020, which reported that the Company's board of directors had elected Al Monaco as a new director of the Company effective as of February 18, 2020. At the time of his election, Mr. Monaco’s board committee appointment had not been determined. On May 15, 2020, the board of directors appointed Mr. Monaco to serve as a member of the board’s compensation committee. Except as set forth herein, no other information in the Company’s Current Report on Form 8-K filed on February 18, 2020 is amended. 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.

Item 7.01: Regulation FD Disclosure Item 9.01: Financial Statements and Exhibits EXHIBIT 104

(e) On January 22, 2020, the Compensation Committee of the Weyerhaeuser Company Board of Directors approved a new form of terms and conditions for future performance share unit awards that may be granted under the Weyerhaeuser Company 2013 Long-Term Incentive Plan. A copy of the new form of performance share unit award terms and conditions is filed as Exhibit 10.1 to this report and incorporated herein by reference. Section 9 - Financial Statements and Exhibits

Item 5.07 Submission of Matters to a Vote of Security Holders

Election of Directors; Appointment of Certain Officers; Compensatory Arrangement of Certain Officers On August 24, 2018, the board of directors of Weyerhaeuser Company (“Weyerhaeuser” or the “Company”) appointed Devin W. Stockfish, 45, as Weyerhaeuser’s president and chief executive officer and as a member of the Weyerhaeuser board of directors, effective January 1, 2019. He will replace Doyle R. Simons, who will retire as an officer of the Company and as a member of the Weyerhaeuser board of directors effective January 1, 2019. Mr. Simons will remain employed with the Company as a senior advisor through April 1, 2019. Mr. Stockfish has been employed in various capacities with Weyerhaeuser since 2013. He served as assistant general counsel from March 2013 through July 2014, and as senior vice president, general counsel and corporate secretary from July 2014 through January 2016.

(b) On November 13, 2017, Weyerhaeuser Company announced that Rhonda D. Hunter, Senior Vice President, Timberlands, will retire from her position with the company effective January 1, 2018 after more than 30 years of service. The company also announced the appointment of Devin W. Stockfish as Senior Vice President, Timberlands effective January 1, 2018. Mr. Stockfish joined the company in 2013 and currently serves as its Vice President, Western Timberlands. Section 9 - Financial Statements and Exhibits

(e) On January 20, 2017, the Compensation Committee of the Weyerhaeuser Company Board of Directors approved: (1) The form of terms and conditions for future performance share unit awards that may be granted under the Weyerhaeuser Company 2013 Long-Term Incentive Plan. A copy of the 2017 Performance Share Unit Award Terms and Conditions is filed as Exhibit 10.1 to this report and incorporated herein by reference. (2) The form of terms and conditions for future restricted stock unit awards that may be granted under the Weyerhaeuser Company 2013 Long-Term Incentive Plan. A copy of the 2017 Restricted Stock Unit Award Terms and Conditions is filed as Exhibit 10.2 to this report and incorporated herein by reference. Section 9 - Financial Statements and Exhibits

Item 5.07 Submission of Matters to a Vote of Security Holders

Board of Directors Effective immediately after the consummation of the Merger: • the board of directors of Weyerhaeuser (the “ Weyerhaeuser Board ”) was expanded from 10 to 13 members; • Debra A. Cafaro and Wayne W. Murdy resigned from the Weyerhaeuser Board; • Rick R. Holley, Sara Grootwassink Lewis, John F. Morgan Sr., Marc F. Racicot and Lawrence A. Selzer (formerly on the board of directors of Plum Creek) were appointed to the Weyerhaeuser Board; • Mr. Holley was appointed as the non-executive chairman of the Weyerhaeuser Board (replacing Charles R. Williamson in such role); • Mr.

On February 17, 2016, Weyerhaeuser Company (the “Company”) entered into an executive employment agreement (the “Employment Agreement”) with Doyle R. Simons, the Company’s President and Chief Executive Officer. The Employment Agreement provides for an annual base salary of $1,000,000 per year and has a five year term. Mr. Simons will be eligible to participate in the Company’s annual cash incentive bonus plan, including with respect to fiscal year 2016, in accordance with the terms of the annual incentive program applicable generally to senior executives of the Company. The target value for the bonus plan will be no less than 150% of Mr. Simons’ annual base salary. Mr. Simons will be eligible to receive annual grants under the Company’s long-term incentive compensation plans on terms and conditions no less favorable than the awards made generally to other senior executives.

On January 20, 2016, the Compensation Committee of the Company's Board of Directors approved: (1) The form of terms and conditions for future performance share unit awards that may be granted under the Weyerhaeuser Company 2013 Long-Term Incentive Plan. A copy of the 2016 Performance Share Unit Award Terms and Conditions (U.S.) is filed as Exhibit 10.1 to this report. (2) The form of terms and conditions for future restricted stock unit awards that may be granted under the Weyerhaeuser Company 2013 Long-Term Incentive Plan. A copy of the 2016 Restricted Stock Unit Award Terms and Conditions is filed as Exhibit 10.2 to this report.