SHORT JAY M PHD 4

What Happened
Jay M. Short, Ph.D., CEO of BioAtla, had 7,728 shares withheld by the company to satisfy tax and withholding obligations connected with the vesting and net settlement of previously reported restricted stock units (RSUs). The shares were withheld at $0.25 per share, totaling approximately $1,909. This was not an open‑market sale by the insider but a tax-withholding/net-settlement action.

Key Details

• Transaction date: 2026-02-28; Form 4 filed: 2026-03-02.
• Transaction type: Tax withholding/net settlement of vested RSUs (code F).
• Shares withheld: 7,728 at $0.25 per share; total value ≈ $1,909.
• Shares owned after transaction: Not specified in the provided excerpt of the filing.
• Footnotes: F1 clarifies this is issuer withholding to satisfy income tax obligations on vesting (not a sale by the Reporting Person). F2 notes the Reporting Person and spouse manage Himalaya Parent LLC and disclaim beneficial ownership of those reported securities except to the extent of pecuniary interest.
• Filing timeliness: Form 4 was filed within the typical 2-business-day window after the reported transaction date.

Context
Withholding shares to cover taxes on vested RSUs is a common administrative (non-market) transaction and does not indicate an insider selling shares on the open market. For retail investors, purchases or open-market sales by insiders usually carry more signal than routine tax-withholding events like this one.