Form 4 for SLDB Solid Biosciences Inc.
Accepted 2025-10-21 00:00:00 ET · period of report 2025-10-18 · accession 0001193125-25-245090 · SEC index · Original document
Summary rows
Aggregated the way they appear in lists: one row per insider, transaction code and security table.
| X | Filed | Traded | Ticker | Insider | Title | Type | Price | Qty | Owned | ΔOwn | Value |
|---|---|---|---|---|---|---|---|---|---|---|---|
| D | 2025-10-21 | 2025-10-20 | SLDB | Brooks Gabriel | Chief Medical Off | S - Sale+OE | $5.96 | -2,895 | 33.8K | -8% | -$17.3K |
| D | 2025-10-21 | 2025-10-18 | SLDB | Brooks Gabriel | Chief Medical Off | M - OptEx | — | +9,750 | 36.7K | +36% | — |
| D | 2025-10-21 | 2025-10-18 | SLDB | Brooks Gabriel | Chief Medical Off | M - OptEx | $0.00 | -9,750 | 19.5K | -33% | $0 |
Purchase Sale Sale after option exercise All abbreviations
Every reported transaction
| # | Table | Security | Date | Code | A/D | Shares | Price | Owned after | Own | Exercise / expiry | Underlying | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Common | Common Stock | 2025-10-20 | S | D | 2,895 | $5.96 | 33,819 | D | — | — | (F3) This sale was made to cover withholding taxes following the vesting of previously granted RSUs 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. |
| 2 | Common | Common Stock | 2025-10-18 | M | A | 9,750 | — | 36,714 | D | — | — | (F1) Restricted stock units ("RSUs") convert into common stock on a one-for-one basis. (F2) Includes 4,152 shares of common stock acquired under the Solid Biosciences Inc. Employee Stock Purchase Plan on May 30, 2025. |
| 3 | Derivative | Restricted Stock Units | 2025-10-18 | M | D | 9,750 | $0.00 | 19,500 | D | — · — to — | 9,750 Common Stock | (F1) Restricted stock units ("RSUs") convert into common stock on a one-for-one basis. (F4) The RSUs were granted on October 18, 2023 (the "Grant Date") and vest over four years, with 25% of the original number of shares vesting on each anniversary of the Grant Date until the fourth such anniversary. |