Qatanani Mo 4

What Happened
Qatanani Mo, Chief Scientific Officer of Scholar Rock (SRRK), sold 8,406 shares on 2026-01-16 at $44.48 per share, generating proceeds of $373,880. The sale is reported as a disposition (code S) and was executed through a broker.

Key Details

• Transaction date and price: 2026-01-16, 8,406 shares at $44.48 each. Total proceeds ~$373,880.
• Reason: This was a mandatory "sell to cover" to satisfy tax withholding on RSUs that vested on 2026-01-15 (not a discretionary sale).
• Vesting/grant info: The sold shares relate to RSUs granted on Feb 14, 2022 and Feb 12, 2024; those RSU shares were fully vested.
• Holdings after the transaction: 14,898 shares of common stock and 85,660 RSUs (per filing footnote).
• Filing timeliness: Report filed 2026-01-21 for a 2026-01-16 transaction — outside the typical 2-business-day Form 4 window (appears late).

Context
"Sell to cover" transactions are routine tax-withholding sales when RSUs vest and do not necessarily indicate the insider's view of the company. The filing notes the sale was mandated by the issuer’s procedure and was not a voluntary, discretionary trade.