| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Sievers Eric | Chief Medical Officer | C/O BIOATLA, INC. 11085 TORREYANA ROAD, SAN DIEGO | /s/ Christian Vasquez, as Attorney-in-Fact for Eric Sievers | 02 Sep 2025 | 0001835116 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | BCAB | Common Stock | Tax liability | -$1,243 | -2,729 | -0.74% | $0.4555 | 364,574 | 31 Aug 2025 | Direct | F1 |
| Id | Content |
|---|---|
| F1 | This transaction is not a sale of shares by the Reporting Person. Instead, this represents shares that have been withheld by the Issuer to satisfy its income tax and withholding and remittance obligations in connection with the vesting and net settlement of previously reported restricted stock units. |