Form 4 for SLDB Solid Biosciences Inc.
Accepted 2025-12-04 00:00:00 ET · period of report 2025-12-02 · accession 0001193125-25-308115 · 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| DT | 2025-12-04 | 2025-12-03 | SLDB | Cumbo Alexander | Pres, CEO, Dir | S - Sale+OE | $5.11 | -10.8K | 81.4K | -12% | -$55.2K |
| DT | 2025-12-04 | 2025-12-02 | SLDB | Cumbo Alexander | Pres, CEO, Dir | M - OptEx | — | +28.6K | 92.2K | +45% | — |
| DT | 2025-12-04 | 2025-12-02 | SLDB | Cumbo Alexander | Pres, CEO, Dir | M - OptEx | $0.00 | -28.6K | 28.6K | -50% | $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 | 2025-12-03 | S | D | 10,808 | $5.11 | 81,388 | D | — | — | (F3) This sale was made to cover withholding taxes following the vesting of the previously granted RSUs pursuant to a durable automatic sales instruction letter adopted by Mr. Cumbo on August 18, 2024 effecting the sell-to-cover election. The sale does not represent a discretionary trade by Mr. Cumbo. |
| 2 | Common | Common Stock | 2025-12-02 | M | A | 28,612 | — | 92,196 | D | — | — | (F1) Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock (the "RSUs"). (F2) Includes 2,866 shares of common stock acquired under the Solid Biosciences Inc. Employee Stock Purchase Plan on May 30, 2025. |
| 3 | Derivative | Restricted Stock Units | 2025-12-02 | M | D | 28,612 | $0.00 | 28,613 | D | — · — to — | 28,612 Common Stock | (F1) Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock (the "RSUs"). (F4) The RSUs were granted on December 2, 2022 (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. |