| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Qatanani Mo | CHIEF SCIENTIFIC OFFICER | 301 BINNEY STREET, CAMBRIDGE | /s/ Junlin Ho, Attorney-in-Fact for Mo Qatanani | 17 Sep 2025 | 0001980298 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | SRRK | Common Stock | Sale | $106,527 | -3,178 | -2.8% | $33.52 | 112,317 | 16 Sep 2025 | Direct | F1, F2 |
| Id | Content |
|---|---|
| F1 | Represents the number of shares required to be sold by the reporting person to cover the tax withholding obligation in connection with the vesting of restricted stock units ("RSU") on September 15, 2025. This sale is mandated by the Issuer's election under its equity incentive plans to require the reporting person to fund this tax withholding obligation by completing a "sell to cover" transaction with a brokerage firm designated by the Issuer. This sale does not represent a discretionary trade by the reporting person. The shares vested pursuant to awards that were granted on October 26, 2021 and October 10, 2022. Each RSU represents the contingent right to receive upon vesting of the RSU, one share of the Issuer's common stock. The shares subject to these RSU awards vest annually over four years, subject to a continued service relationship with the Issuer on the applicable vesting date. |
| F2 | Consists of 3,353 shares of common stock and 108,964 RSUs. |