WALDRON RICHARD A 4

What Happened
Richard A. Waldron, Chief Financial Officer of BioAtla (BCAB), had 2,729 shares withheld by the company on 2026-02-28 to satisfy tax and withholding obligations tied to the vesting and net settlement of previously reported restricted stock units. The withholding was recorded at $0.25 per share for a total withholding value of $674. This is not an open-market sale by the reporting person but a tax-withholding event related to RSU vesting.

Key Details

• Transaction date: 2026-02-28; filing date: 2026-03-02 (Form 4 accession 0001193125-26-085968).
• Transaction code: F (payment of exercise price or tax liability via share withholding).
• Shares withheld/Disposed: 2,729 shares at $0.25 each; total value withheld ~$674.
• Shares owned after transaction: not specified in the provided filing details.
• Footnote: issuer withheld shares to satisfy income tax and remittance obligations in connection with vesting and net settlement of previously reported RSUs (i.e., not a sale by the insider).
• No late-filing flag indicated in the provided data.

Context
This was a routine net-settlement/tax-withholding of vested RSUs rather than a discretionary sale or purchase. Such withholdings are common and generally reflect tax obligations, not necessarily the insider’s sentiment about the company.