X0306 4 2020-06-16 0 0001707502 Solid Biosciences Inc. SLDB 0001665124 Nagendran Sukumar C/O SOLID BIOSCIENCES INC. 141 PORTLAND STREET, 5TH FLOOR CAMBRIDGE MA 02139 1 0 0 0 Director Stock Option (Right to Buy) 3.03 2020-06-16 4 A 0 30000 0.00 A 2030-06-16 Common Stock 30000 30000 D Director Stock Option (Right to Buy) 3.03 2020-06-16 4 A 0 10000 0.00 A 2030-06-16 Common Stock 10000 10000 D This option was granted on June 16, 2020 and vests in full on the earlier to occur of the one-year anniversary of the grant date and immediately prior to the Issuer's next annual meeting of stockholders occurring after the grant date, and will vest automatically as to 100% of the unvested portion of such option upon specified change in control events. This option was granted on June 16, 2020 to members of the Clinical Committee of the Board of Directors and vests in full on the earlier to occur of the one-year anniversary of the grant date and immediately prior to the Issuer's next annual meeting of stockholders occurring after the grant date, and will vest automatically as to 100% of the unvested portion of such option upon specified change in control events. /s/ by Lynette Herscha as attorney-in-fact for Sukumar Nagendran 2020-06-18