X0508 4 2026-02-04 0001707502 Solid Biosciences Inc. SLDB 0001997809 Brooks Gabriel C/O SOLID BIOSCIENCES INC. 500 RUTHERFORD AVENUE, THIRD FLOOR CHARLESTOWN MA 02129 false true false false Chief Medical Officer true Common Stock 2026-02-04 4 S false 12616 6.4419 D 84092 D This sale was made to cover withholding taxes following the vesting of previously granted restricted stock units pursuant to a durable automatic sale instruction letter adopted by Dr. Brooks on August 15, 2024 effecting the sell-to-cover election. The sale does not represent a discretionary trade by Dr. Brooks. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $6.28 to $6.60, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in footnote (4) to this Form. /s/ Kimberly Cornwell as attorney-in-fact for Gabriel Brooks 2026-02-06