X0306 4 2020-01-27 0 0001707502 Solid Biosciences Inc. SLDB 0001727460 Ganot Ilan C/O SOLID BIOSCIENCES INC. 141 PORTLAND STREET, 5TH FLOOR CAMBRIDGE MA 02139 1 1 0 0 CEO & President Employee Stock Option (Right to Buy) 3.47 2020-01-27 4 A 0 142000 0.00 A 2030-01-27 Common Stock 142000 142000 D Restricted Stock Unit 0.00 2020-01-27 4 A 0 71000 0.00 A 2030-01-27 Common Stock 71000 71000 D This option was granted on January 27, 2020 and vests in four equal annual installments on the anniversary of the grant date, and will vest automatically as to 100% of the unvested portion of such option upon specified change in control events and the termination of the Reporting Person's employment under specified circumstances. The restricted stock units will vest in 2 installments. Fifty percent will vest six months after the grant date with the remaining fifty percent vesting on the first anniversary of the grant date and will vest automatically as to 100% of the unvested portion of such restricted stock unit grant upon specified change in control events and the termination of the Reporting Person's employment under specified circumstances. /s/ by Lynette Herscha as attorney-in-fact for Ilan Ganot 2020-01-29