Atara Biotherapeutics, Inc.
A biotechnology company making "off-the-shelf" T-cell therapies that treat cancer, autoimmune diseases, and viral infections, using cells donated by healthy strangers rather than a patient's own cells—so treatment can be delivered in days instead of weeks. Founded in 2012 by Dr. Isaac Ciechanover, the company is named in memory of his mother, Atara, who died of ovarian cancer; the name means "crown" in Hebrew. The technology grew out of research at Memorial Sloan Kettering Cancer Center and Australia's QIMR Berghofer Medical Research Institute.
Granted 307.9K · Sold 394.0K
Granted 12.0K
Bought 507.4K
Granted 81.1K · Sold 16.2K
Granted 20.3K · Sold 6.3K
Granted 24.0K
Granted 12.0K
Granted 12.0K
| Insider | Stake change | Holds now | Granted / vested | Bought | Sold |
|---|---|---|---|---|---|
| Huang James +1 co-filerDirector, 10% owner, 10% owner · 6 transactions | — | 3.27M | 307.9K | — | 394.0K |
| Ciongoli Gregory AustinDirector, 10% owner, See Remarks · 1 transaction | — | 1.22M | 12.0K | — | — |
| EcoR1 Capital, LLC10% owner · 1 transaction | — | 1.04M | — | 507.4K | — |
| Nguyen AnhCoPresident and CEO, Director · 9 transactions | +91% | 132.8K | 81.1K | — | 16.2K |
| Grant-Huerta YaninaChief Accounting Officer · 9 transactions | +40.8% | 49.6K | 20.3K | — | 6.3K |
| Cherry Brian NDirector · 1 transaction | — | 38.3K | 24.0K | — | — |
| Heiden William KDirector · 1 transaction | +54.1% | 34.2K | 12.0K | — | — |
| Fust Matthew KDirector · 1 transaction | +66% | 30.2K | 12.0K | — | — |
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 year: +90.9K shares. Grants, option exercises and tax withholding are excluded — they are compensation mechanics, not decisions to buy or sell.