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 267.9K · Bought 1.39M · Sold 946.7K
Bought 800.0K
Granted 206.0K · Sold 32.1K
Granted 40.0K · Sold 42.3K
Granted 1.29M · Bought 186.5K · Sold 199.5K
Granted 40.0K · Bought 20.0K · Sold 1.8K
Granted 65.1K
Granted 60.2K
Granted 40.0K · Bought 15.7K
Granted 40.0K
Granted 537.0K · Sold 9.1K
Granted 395.0K · Bought 77.5K · Sold 5.2K
| Insider | Stake change | Holds now | Granted / vested | Bought | Sold |
|---|---|---|---|---|---|
| Levy GuyDirector · 9 transactions | — | 4.75Mas of Sep 2021 | 267.9K | 1.39M | 946.7K |
| Pfizer Inc +1 co-filer10% owner · 1 transaction | — | 2.24Mas of Dec 2020 | — | — | — |
| Chen Bihua +3 co-filersDirector, 10% owner, Former 10% Owner, 10% owner · 2 transactions | — | 1.49Mas of Dec 2020 | — | 800.0K | — |
| Waldron Richard AFormer Chief Financial Officer · 46 transactions | — | 343.4K | 206.0K | — | 32.1K |
| Smith Scott AndrewDirector · 54 transactions | — | 321.6Kas of Jun 2025 | 40.0K | — | 42.3K |
| Short Jay M PHDChief Executive Officer, Director · 60 transactions | — | 84.6K | 1.29M | 186.5K | 199.5K |
| Steinman LawrenceDirector · 8 transactions | — | 78.5Kas of Jun 2025 | 40.0K | 20.0K | 1.8K |
| Gray Mary AnnDirector · 6 transactions | — | 77.4Kas of Jun 2025 | 65.1K | — | — |
| Williams EddieDirector · 6 transactions | — | 60.2Kas of Jun 2025 | 60.2K | — | — |
| McBrinn SylviaDirector · 7 transactions | — | 59.1Kas of Jun 2025 | 40.0K | 15.7K | — |
| Moran SusanDirector · 2 transactions | — | 52.3Kas of Jun 2025 | 40.0K | — | — |
| Sievers EricChief Medical Officer · 61 transactions | — | 11.8K | 537.0K | — | 9.1K |
| Vasquez ChristianChief Financial Officer · 54 transactions | — | 10.3K | 395.0K | 77.5K | 5.2K |
| Himalaya Parent LLC10% owner · 1 transaction | — | 50as of Jun 2021 | — | — | — |
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 all recorded history: +1.25M shares. Grants, option exercises and tax withholding are excluded — they are compensation mechanics, not decisions to buy or sell.