Trex Company, Inc.

Item 8.01 Other Events. On July 13, 2026, Trex Company, Inc. (the “Company”) entered into a National Distribution Agreement (the “Agreement”) with U.S. Lumber Group, LLC (“USL”) and certain of its affiliates (collectively with USL, the “Distributor”), pursuant to which the Company appointed the Distributor as its authorized national distributor of the Company’s decking, railing, decking fascia, and deck fastening products and certain other products as mutually agreed from time to time (collectively, the “Trex Products”) in the United States and Canada (the “Territory”). Effective January 1, 2027, the Distributor’s appointment will become the sole and exclusive national distributor appointment with respect to the Trex Products in the Territory. Subject to the terms and conditions of the Agreement, the Company reserves the right to sell the Trex Products directly in the Territory, and to appoint additional distributors in the Territory, provided that no additional distributor may promote, distribute, or sell the Trex Products in more than three of the seven designated regions in the United States or throughout the entire Territory. The Company has committed to implement a dual-distribution model in all markets within the Territory (excluding Canada and California) as soon as practicable, and in any event no later than January 1, 2029, pursuant to which the Company will not, without the Distributor’s prior written approval, appoint more than one additional distributor in any market of the Territory. Effective January 1, 2027, the Distributor will be subject to a non-compete restriction prohibiting the Distributor from directly or indirectly promoting, distributing, or selling products that compete with the Trex Products. The initial term of the Agreement expires on December 31, 2031, and thereafter automatically renews for successive one-year periods unless either party provides written notice of termination at least 180 days prior to the end of the initial or any renewal term. Either party may terminate the Agreement during a renewal term, with or without cause, upon prior written notice. The Agreement may also be terminated by either party upon the other party’s material default (subject to notice and cure periods), bankruptcy, assignment for the benefit of creditors, or actions that have or would reasonably be expected to have a long-term and materially negative impact on the non-defaulting party’s reputation and standing in the marketplace (subject to notice and cure period). On July 13, 2026, the Company provided notice of termination, which shall be effective August 12, 2026, of its entire commercial distribution relationship with Boise Cascade Company and its subsidiary Boise Cascade BMD, L.L.C., including any and all predecessors, successors, subsidiaries, affiliates and/or other related entities. There are no termination fees associated with the termination.