FLIER JEFFREY S. 4

What Happened
Jeffrey S. Flier, a director of Scholar Rock Holding Corp (SRRK), sold a total of 3,053 shares in three open‑market transactions on July 1, 2026 for aggregate proceeds of approximately $164,490. Breakdown by trade:

• 1,568 shares at $53.53 — $83,939
• 1,470 shares at $54.24 — $79,728
• 15 shares at $54.88 — $823
  These sales were effected under a Rule 10b5‑1 trading plan to cover tax obligations related to the vesting/settlement of restricted stock units (RSUs), so they are routine tax‑related disposals rather than an unsolicited directional trade.

Key Details

• Transaction date: July 1, 2026 (Form 4 filed July 6, 2026). The filing appears later than the usual two-business‑day reporting deadline.
• Prices: reported as weighted averages; sale price ranges cited in the filing: $52.960–$53.944, $53.950–$54.800, and $54.805–$55.010 for the respective tranche groups.
• Shares sold: 3,053 total; proceeds ≈ $164,490.
• Shares owned after transactions (per filing footnotes):
  • After first tranche: 22,502 shares of common stock and 6,839 RSUs.
  • After second tranche: 21,032 shares of common stock and 6,839 RSUs.
  • After third (final) tranche: 21,017 shares of common stock and 6,839 RSUs.
• Notable footnote: Sales were made pursuant to a 10b5‑1 plan adopted March 31, 2026 to cover tax withholding on RSU vesting.

Context

• These were sales (S) to satisfy tax obligations on RSUs, a common insider action that does not necessarily indicate a change in view about the company.
• The filing delay (filed July 6 for July 1 trades) is noted; late filings can draw regulatory attention but do not change the economic nature of the trades.