TAX INFORMATION DOMTAR EXCHANGE OFFER Domtar Exchange Offer Calculating Your Tax Basis – Domtar Exchange Offer WY COMMON SHARES Form 8937: WY Mandatory Convertible Preference Share, Series A converted WY Common Shares 07/01/2016 Form 8937: WY Common Stock issued for Plum Creek Common Stock 02/19/2016 2014 Tax Report: Split-off of WY Common Stock Special Dividend Issued to Shareholders – Explanation 09/01/2010 Special Dividend Issued to Shareholders – Cost Basis 09/01/2010 Prospectus Supplement 07/13/2010 WY LIMITED EXCHANGEABLE SHARES Redemption of Weyerhaeuser Company Limited Exchangeable Shares Eligible dividend designation – Canadian resident shareholders of exchangeable shares WY TAX TREATMENT OF DIVIDENDS WY Tax Treatment of Dividends 2020 WY Tax Treatment of Dividends 2019 WY Tax Treatment of Dividends 2018 WY Tax Treatment of Dividends 2017 (Updated) WY Tax Treatment of Dividends 2017 WY Tax Treatment of Dividends 2016 WY Tax Treatment of Dividends 2015 WY Tax Treatment of Dividends 2014 WY Tax Treatment of Dividends 2013 WY Tax Treatment of Dividends 2012 WY Tax Treatment of Dividends 2011 WY Tax Treatment of Dividends 2010 YOU MAY ALSO BE INTERESTED IN: Tax FAQs WY Stock Splits Share Home Shareholder Center Tax Information VIEW SITEMAP QUICK LINKS Weyerhaeuser Japan Legal Notices Privacy Policy Do Not Sell My Information (California Residents) © 2021 Weyerhaeuser Company. All Rights Reserved.

TRANSFER AGENT TRANSFER AGENT Computershare P.O. Box 505000 Louisville, KY 40233 Computershare, our transfer agent, maintains the records for our registered shareholders and can help you with a variety of shareholder-related services at no charge, including: change of name or address, consolidation of accounts, duplicate mailings, dividend reinvestment and direct stock purchase plan enrollment, lost stock certificates, transfer of stock to another person, and additional administrative services. Access your investor statements online 24 hours a day, seven days a week at www.computershare.com/investor. To find out more about the services and programs available to you, please contact Computershare directly to access your account by internet, telephone or mail — whichever is most convenient for you. Contact us by telephone Shareholders in the United States 800.561.4405 800.231.5469 TDD for hearing-impaired Foreign shareholders 201.680.6578 201.680.6610 TDD for hearing-impaired Contact us online www.computershare.com/investor Contact us by mail Weyerhaeuser Company c/o Computershare P.O. Box 505000 Louisville, KY 40233 Share Home Shareholder Center Transfer Agent VIEW SITEMAP QUICK LINKS Weyerhaeuser Japan Legal Notices Privacy Policy Do Not Sell My Information (California Residents) © 2021 Weyerhaeuser Company. All Rights Reserved.