Eric Sievers - 11 Mar 2026 Form 4 Insider Report for BioAtla, Inc. (BCAB)

Reporting relationship: Chief Medical Officer
Issuer ticker: BCAB
Reported as of: 11 Mar 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 05 Jun 2026, 16:30:05 UTC
Prior SEC filing: 12 Mar 2026
Source filing: View source filing
Reporting owner signature: Christian Vasquez, as Attorney-in-Fact for Eric Sievers

Key filing fact

Eric Sievers filed Form 4 for BioAtla, Inc. (BCAB) on 05 Jun 2026.

Key facts

This page summarizes Eric Sievers's Form 4 filing for BioAtla, Inc. (BCAB).
2 reported transactions and 0 derivative rows are listed below.
Accepted by SEC: 05 Jun 2026, 16:30.

Change

Previous filing in this sequence was filed on 12 Mar 2026.
Current net transaction value: $0.

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 0001835116 Primary reporting owner

Sievers Eric

Relationship: Chief Medical Officer
Address: C/O BIOATLA, INC. 11085 TORREYANA ROAD, SAN DIEGO
Signature: Christian Vasquez, as Attorney-in-Fact for Eric Sievers
Signature date: 05 Jun 2026

Reported non-derivative transactions

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

BCAB transaction

Common Stock

Tax liability

Transaction value
Shares: -360
Change %: -3%
Price: $0.1690^*
Shares after: 11,614
Date: 11 Mar 2026
Ownership: Direct
Footnotes: F1, F2

BCAB transaction

Common Stock

Tax liability

Transaction value
Shares: -134
Change %: -1.1%
Price: $3.93^*
Shares after: 11,840
Date: 31 May 2026
Ownership: Direct
Footnotes: F1, F2

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

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 2 footnotes

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.

Footnote F2

Effective on April 6, 2026, the Issuer effected a 50-for-1 share consolidation of its common stock (the "Share Consolidation"). The amount of securities reported on this Form 4 has been adjusted to reflect the Share Consolidation.