ALEXANDER MARK A 4

What Happened
Mark A. Alexander, a director of Builders FirstSource, received an award/acquisition of 299 shares on March 1, 2026, at an acquisition price of $104.29 per share, for a total value of approximately $31,183. This was an acquisition (award) of stock issued in lieu of cash compensation rather than an open-market purchase or sale.

Key Details

• Transaction date: 2026-03-01; filing date: 2026-03-03 (filed timely).
• Transaction type/code: A — Grant, award or other acquisition.
• Shares acquired: 299; Price per share: $104.29; Total value: ~$31,183.
• Shares owned after the transaction: not specified in the provided excerpt.
• Footnote: Acquisition was shares issued in lieu of cash compensation under the company’s 2014 Incentive Plan per the Amended and Restated Director Compensation Policy (F1).
• No indication of a 10b5-1 plan, cashless exercise, gift, or tax-withholding sale in the provided details.

Context
Director share awards paid in lieu of cash are common as routine compensation and do not necessarily signal personal trading sentiment. This was not an option exercise or an open-market trade — it’s compensation issued by the company.