X0508 4 2026-01-16 0001727196 Scholar Rock Holding Corp SRRK 0001980298 Qatanani Mo 301 BINNEY STREET CAMBRIDGE MA 02142 false true false false CHIEF SCIENTIFIC OFFICER 0 Common Stock 2026-01-16 4 S 0 8406 44.4777 D 100558 D Represents the number of shares required to be sold by the Reporting Person to cover the tax withholding obligation in connection with the vesting of restricted stock units ("RSU") on January 15, 2026. This sale is mandated by the Issuer's election under its equity incentive plans to require the reporting person to fund this tax withholding obligation by completing a "sell to cover" transaction with a brokerage firm designated by the Issuer. This sale does not represent a discretionary trade by the Reporting Person. The shares vested pursuant to awards that were granted on February 14, 2022 and February 12, 2024. Each RSU represents the contingent right to receive upon vesting of the RSU, one share of the Issuer's common stock. The shares subject to these RSU awards are fully vested. Consists of 14,898 shares of common stock and 85,660 RSUs. /s/ Junlin Ho, Attorney-in-Fact for Mo Qatanani 2026-01-21