X0306 4 2018-07-25 0 0001707502 Solid Biosciences Inc. SLDB 0001727640 Sullivan Lynne Marie C/O SOLID BIOSCIENCES INC. 141 PORTLAND STREET, 5TH FLOOR CAMBRIDGE MA 02139 1 0 0 0 Director Stock Option (Right to Buy) 37.89 2018-07-25 4 A 0 1835 0.00 A 2028-07-25 Common Stock 1835 1835 D This option was granted on July 25, 2018 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 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/ Lynne Sullivan 2018-07-26