X0306 4 2020-06-16 0 0001707502 Solid Biosciences Inc. SLDB 0001727440 Stone Adam Leo C/O PERCEPTIVE ADVISORS LLC 51 ASTOR PLACE, 10TH FLOOR NEW YORK NY 10003 1 0 0 0 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 This option was granted on June 16, 2020 and vests in full on the earlier to occur of June 16, 2021 and immediately prior to the Issuer's first 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/ Adam Leo Stone 2020-06-18