Form 4 for SLDB Solid Biosciences Inc.
Accepted 2026-02-02 00:00:00 ET · period of report 2026-01-29 · accession 0001193125-26-034083 · 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| DMT | 2026-02-02 | 2026-01-29+ | SLDB | Brooks Gabriel | Chief Medical Off | M - OptEx | — | +87.1K | 125.0K | +229% | — |
| DT | 2026-02-02 | 2026-02-02 | SLDB | Brooks Gabriel | Chief Medical Off | S - Sale+OE | $6.44 | -28.3K | 96.7K | -23% | -$182.5K |
| DMT | 2026-02-02 | 2026-01-29+ | SLDB | Brooks Gabriel | Chief Medical Off | M - OptEx | $0.00 | -87.1K | 0 | -100% | $0 |
| DMT | 2026-02-02 | 2026-01-29 | SLDB | Brooks Gabriel | Chief Medical Off | A - Grant | $0.00 | +311.2K | 103.8K | New | $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 | 2026-01-29 | M | A | 58,847 | — | 96,818 | D | — | — | (F1) Each performance stock unit ("PSUs") converts to common stock on a one-for-one basis (the "PSUs"). (F2) Includes 4,152 shares of common stock acquired under the Solid Biosciences Inc. Employee Stock Purchase Plan on November 28, 2025. |
| 2 | Common | Common Stock | 2026-02-02 | S | D | 28,335 | $6.44 | 96,708 | D | — | — | (F4) This sale was made to cover withholding taxes following the vesting of previously granted PSUs 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. (F5) The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $6.295 to $6.580, 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. |
| 3 | Common | Common Stock | 2026-01-31 | M | A | 28,225 | — | 125,043 | D | — | — | (F3) Each restricted stock unit ("RSUs") converts to common stock on a one-for-one basis. |
| 4 | Derivative | Restricted Stock Units | 2026-01-31 | M | D | 28,225 | $0.00 | 84,675 | D | — · — to — | 28,225 Common Stock | (F3) Each restricted stock unit ("RSUs") converts to common stock on a one-for-one basis. (F9) On January 31, 2025 (the "2025 Grant Date"), the reporting person was granted 112,900 RSUs, with 25% of the original number of shares vesting on each anniversary of the 2025 Grant Date until the fourth such anniversary. |
| 5 | Derivative | Performance Stock Units | 2026-01-29 | M | D | 58,847 | $0.00 | 0 | D | — · — to — | 58,847 Common Stock | (F1) Each performance stock unit ("PSUs") converts to common stock on a one-for-one basis (the "PSUs"). (F6) The PSUs were granted on June 11, 2024 and provide for the vesting of 25% of the target number of underlying RSUs granted upon the achievement of each of four independent performance milestones predetermined by the Board ("Performance Milestones"), subject to the grantee's continued service with the Company (the "Approval Conditions"). The Performance Milestones are tied to the achievement of certain business objectives, as certified by the Board on specified evaluation dates, and are non-market and non-financial in nature. The performance criteria specified for the first Performance Milestone was determined to be met on January 29, 2026 (the "2026 Grant Date") resulting in the vesting of the PSUs as to 25% of the underlying shares. |
| 6 | Derivative | Employee Stock Option (Right to Buy) | 2026-01-29 | A | A | 207,450 | $0.00 | 207,450 | D | $6.60 · — to 2036-01-29 | 207,450 Common Stock | (F7) This option was granted on the 2026 Grant Date and vests over four years, with 25% of the original number of shares vesting on the first anniversary of the 2026 Grant Date and 2.0833% of the original number of shares monthly thereafter until the fourth such anniversary. |
| 7 | Derivative | Restricted Stock Units | 2026-01-29 | A | A | 103,750 | $0.00 | 103,750 | D | — · — to — | 103,750 Common Stock | (F3) Each restricted stock unit ("RSUs") converts to common stock on a one-for-one basis. (F8) The RSUs were granted on the 2026 Grant Date and vest over four years, with 25% of the original number of shares vesting on each anniversary of the 2026 Grant Date until the fourth such anniversary. |