On January 1, 2021, Builders FirstSource, Inc. completed its previously announced all stock merger transaction with BMC Stock Holdings, Inc. pursuant to the Agreement and Plan of Merger, dated as of August 26, 2020 (as amended, restated, supplemented, or otherwise modified from time to time, the Merger Agreement"), by and among Builders FirstSource, Boston Merger Sub I Inc., a Delaware corporation and a direct wholly owned subsidiary of Builders FirstSource (Merger Sub"), and BMC. On the terms and subject to the conditions set forth in the Merger Agreement, at the effective time of the Merger on January 1, 2021 (the Effective Time"), Merger Sub merged with and into BMC, with BMC continuing as the surviving corporation and a wholly owned subsidiary of Builders FirstSource (the Merger"). Effective on the ninety-first (91st) day following the Effective Time and following the retirement of Mr. Crow as Chief Executive Officer of Builders FirstSource, Mr. Flitman will also be appointed to serve as the Chief Executive Officer of Builders FirstSource.