Form 4 Filing for BioAtla, Inc. - Officer Transactions

This filing details transactions made by Eric Sievers, Chief Medical Officer of BioAtla, Inc. On March 11, 2026, 360 shares of Common Stock were disposed of with a price of $0.169 per share, resulting in 11,614 shares held post-transaction. On May 31, 2026, an additional 134 shares of Common Stock were disposed of at $3.93 per share, leading to 11,840 shares held post-transaction. Footnote F1 clarifies that these disposals were not sales but shares withheld by the Issuer to cover tax obligations related to restricted stock units. Footnote F2 indicates that all reported share amounts have been adjusted to reflect a 50-for-1 share consolidation effective April 6, 2026.