| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| WALDRON RICHARD A | Former Chief Financial Officer | C/O BIOATLA, INC. 11085 TORREYANA ROAD, SAN DIEGO | Christian Vasquez, as Attorney-in-Fact for Richard A. Waldron | 02 Mar 2026 | 0001226961 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | BCAB | Common Stock | Tax liability | $674 | -2,729 | -0.79% | $0.2470 | 343,421 | 28 Feb 2026 | Direct | F1 |
Richard A. Waldron is no longer subject to Section 16 filing requirements. Form 4 or Form 5 obligations may continue.
| 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. |