Richard A. Waldron - 28 Feb 2026 Form 4 Insider Report for BioAtla, Inc. (BCAB)

Reporting relationship: Former Chief Financial Officer
Issuer ticker: BCAB
Reported as of: 28 Feb 2026
Net transaction value: -$674
SEC form: 4
Accepted by SEC: 02 Mar 2026, 18:14:12 UTC
Prior SEC filing: 01 Dec 2025
Source filing: View source filing
Reporting owner signature: Christian Vasquez, as Attorney-in-Fact for Richard A. Waldron

Key filing fact

Richard A. Waldron filed Form 4 for BioAtla, Inc. (BCAB) on 02 Mar 2026.

Key facts

This page summarizes Richard A. Waldron's Form 4 filing for BioAtla, Inc. (BCAB).
1 reported transaction and 0 derivative rows are listed below.
Accepted by SEC: 02 Mar 2026, 18:14.

Change

Previous filing in this sequence was filed on 01 Dec 2025.
Current net transaction value: -$674.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001226961 Primary reporting owner

WALDRON RICHARD A

Relationship: Former Chief Financial Officer
Address: C/O BIOATLA, INC. 11085 TORREYANA ROAD, SAN DIEGO
Signature: Christian Vasquez, as Attorney-in-Fact for Richard A. Waldron
Signature date: 02 Mar 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

BCAB transaction

Common Stock

Tax liability

Transaction value: $674
Shares: -2,729
Change %: -0.79%
Price: $0.2470
Shares after: 343,421
Date: 28 Feb 2026
Ownership: Direct
Footnotes: F1

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Section 16 status

Richard A. Waldron is no longer subject to Section 16 filing requirements. Form 4 or Form 5 obligations may still apply in specific circumstances.

Explanation of responses 1 footnote

Footnote 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.