X0609 4 2026-06-04 0 0001727196 Scholar Rock Holding Corp SRRK 0001692359 Brudnick Richard false 301 BINNEY STREET CAMBRIDGE MA 02142 1 0 0 0 0 Common Stock 2026-06-04 4 A 0 6839 0.00 A 21896 D Stock Option (Right to Buy) 45.33 2026-06-04 4 A 0 4310 0 A 2036-06-04 Common Stock 4310 4310 D Each restricted stock unit ("RSU") represents the contingent right to receive, upon vesting of the RSU, one share of the Issuer's common stock. The shares subject to this RSU vest on the earlier of June 15, 2027 or on the date of the Issuer's next Annual Meeting subject to continued service to the Issuer through such date. Consists of 15,057 shares of common stock and 6,839 RSUs. Options to vest and become fully exercisable on the earlier of the first anniversary following the date of grant or on the date of the Issuer's next Annual Meeting, subject to continued service to the Issuer through such date. /s/ Junlin Ho, Attorney-in-Fact for Richard Brudnick 2026-06-08