Solid Biosciences Inc. — Director's Dealing 2025

Aug 18, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Solid Biosciences Inc. (SLDB)
CIK: 0001707502
Period of Report: 2025-08-14

Reporting Person: Howton David T (N/A)

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2025-08-14	Employee Stock Option (Right to Buy)	$6.17	A	150000	Acquired	2035-08-14	Common Stock (150000)	Direct
2025-08-14	Restricted Stock Units	$	A	75000	Acquired		Common Stock (75000)	Direct

Footnotes

F1: The RSUs (as defined in footnote 2) together with this option were granted on August 14, 2025 (the "Grant Date") and vest over four years, with 50% of the original number of shares vesting on the second anniversary of the Grant Date and 25% of the original number of shares annually thereafter until the fourth such anniversary.

F2: Each restricted stock unit represents a contingent right to receive one share of the issuer's common stock (the "RSUs").