Bioatla, Inc.
A San Diego biopharmaceutical company developing antibody-based medicines for solid-tumor cancers. Its signature Conditionally Active Biologics (CAB) platform engineers antibodies to stay switched off in healthy tissue and only wake up in the acidic environment of a tumor, sparing healthy cells. Founded in 2007 by biotech veteran Jay Short and Carolyn Anderson, the firm's name plays on that same idea—antibodies that act only under certain conditions.
Granted 206.0K
Granted 40.0K
Granted 1.28M · Bought 50.0K
Granted 40.0K · Bought 20.0K
Granted 54.7K
Granted 51.8K
Granted 40.0K · Bought 6.0K
Granted 40.0K
Granted 537.0K
Granted 395.0K · Bought 7.5K
| Insider | Stake change | Holds now | Granted / vested | Bought | Sold |
|---|---|---|---|---|---|
| Waldron Richard AFormer Chief Financial Officer · 10 transactions | +168.6% | 343.4K | 206.0K | — | — |
| Smith Scott AndrewDirector · 15 transactions | +4.4% | 321.6Kas of Jun 2025 | 40.0K | — | — |
| Short Jay M PHDChief Executive Officer, Director · 14 transactions | -97.2% | 84.6K | 1.28M | 50.0K | — |
| Steinman LawrenceDirector · 3 transactions | +325% | 78.5Kas of Jun 2025 | 40.0K | 20.0K | — |
| Gray Mary AnnDirector · 4 transactions | +240.6% | 77.4Kas of Jun 2025 | 54.7K | — | — |
| Williams EddieDirector · 4 transactions | +617.7% | 60.2Kas of Jun 2025 | 51.8K | — | — |
| McBrinn SylviaDirector · 4 transactions | +209.2% | 59.1Kas of Jun 2025 | 40.0K | 6.0K | — |
| Moran SusanDirector · 2 transactions | +325% | 52.3Kas of Jun 2025 | 40.0K | — | — |
| Sievers EricChief Medical Officer · 23 transactions | -87.3% | 11.8K | 537.0K | — | — |
| Vasquez ChristianChief Financial Officer · 14 transactions | -89.8% | 10.3K | 395.0K | 7.5K | — |
Select a row to see that insider’s individual transactions. Sum of the holdings confirmed in the 12 months before this insider's last filing. A Form 4 reports a holding per line — held directly, or through a named trust, partnership or foundation, and in each share class separately — never a person’s total. Lines not restated in that time are left out and shown apart: an active filer restates what they still hold, so a line they did not restate is more often an entity since renamed, whose shares a successor line reports too. An amber marker means some were left out.
Net open-market activity over the last 3 years: +83.5K shares. Grants, option exercises and tax withholding are excluded — they are compensation mechanics, not decisions to buy or sell.