Jackson Peter M. 4

What Happened

• Peter M. Jackson, President & CEO and a Director of Builders FirstSource (BLDR), was granted a total of 50,962 restricted stock units (42,570 RSUs and 8,392 performance-based RSUs) on March 15, 2026 (acquired at $0.00 per share as awards). On the same date, 8,508 shares were withheld to satisfy tax withholding obligations at an indicated per-share value of $88.09, yielding a withholding value of about $749,470.
• These were awards (not open-market purchases or option exercises). The withheld shares reflect tax withholding on vesting and do not necessarily indicate a voluntary sale by the insider.

Key Details

• Transaction date: 2026-03-15; filing date: 2026-03-17 (filed two days after the transaction).
• Grants: 42,570 RSUs @ $0.00 and 8,392 performance-based RSUs @ $0.00 (total 50,962 RSUs granted).
• Withholding/disposition: 8,508 shares withheld at $88.09/share (total ~ $749,470) to satisfy tax liabilities.
• Shares owned after the transaction: not disclosed in the provided filing excerpt.
• Footnotes: F1 — standard RSU grant under the 2014 Incentive Plan (vests in 33.3% increments in 2027–2029); F2 — performance-based RSU vesting; F3 — shares withheld to pay tax withholding requirements on vesting.
• Timeliness: Filing appears timely (filed two days after the reported transaction date).

Context

• These transactions are award grants and routine tax withholding on vesting. RSU grants are common executive compensation; they are not the same as an open-market purchase (which could be interpreted as a direct bullish signal).
• Withholding shares to cover taxes is a normal administrative action and often appears as a disposition on Form 4 even though it’s not a discretionary sale.