WEYERHAEUSER CO 8-K

What Happened
Weyerhaeuser Company announced on February 26, 2026 that it posted investor presentation materials to the Investors section of its website that it expects to use in discussions with the investment community. A copy of the presentation is furnished as Exhibit 99.1 to the Form 8-K.

Key Details

• Date: February 26, 2026 — presentation materials posted and furnished on Form 8-K.
• Exhibit 99.1: Investor presentation furnished with the filing and available on the company’s Investors webpage.
• Filing status: The materials are furnished (not “filed”) under General Instruction B.2 of Form 8-K and are not subject to Section 18 liability or automatically incorporated by reference into other registration statements.

Why It Matters
Posting an investor presentation gives investors and analysts access to Weyerhaeuser’s current messaging on strategy, outlook or operating priorities ahead of investor meetings or calls. This 8-K does not report earnings, management changes, or new financial results — it simply makes the presentation materials available and clarifies their regulatory status. Investors should review the presentation on the company’s website for any forward-looking commentary or updates.