X0306 4 2018-12-13 0 0001707502 Solid Biosciences Inc. SLDB 0001728221 Huffines Robert Luther C/O SOLID BIOSCIENCES INC. 141 PORTLAND STREET, 5TH FLOOR CAMBRIDGE MA 02139 1 0 0 0 Director Stock Option (Right to Buy) 23.58 2018-12-13 4 A 0 8165 0.00 A 2028-12-13 Common Stock 8165 8165 D This option was granted on December 13, 2018 and vests in full on the earlier to occur of July 25, 2019 and immediately prior to the Issuer's first annual meeting of stockholders occurring after the grant date, and will vest automatically as to I 00% of the unvested portion of such option upon specified change in control events. /s/ Robert Luther Huffines 2018-12-17