| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Vasquez Christian | Officer | C/O BIOATLA, INC. 11085 TORREYANA ROAD, SAN DIEGO | /s/ Christian Vasquez | 01 Dec 2025 | 0001835732 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | BCAB | Common Stock | Tax liability | $1,416 | -1,566 | -0.53% | $0.9040 | 291,998 | 30 Nov 2025 | Direct | F1, F2 |
| 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. |
| F2 | Includes shares purchased under the Issuer's ESPP. |