ATRA — Atara Biotherapeutics, Inc.
Price · 2024-08-26 → 2026-08-21
499 daily closes shownAnonymous view is capped at two years of history. A free account extends it to five, and Pro opens the whole archive back to 2016-01-04.
Performance
Technicals
Others in Healthcare
Measured signals that fired on ATRA
| date | signal | measured base rate |
|---|---|---|
| 2026-07-07 | Fair value gap, bearish structure | -0.45% over 21 days · t = -3.29 · n = 108,591 statistically distinguishable from its control group |
| 2026-05-07 | Fair value gap, bullish structure | -0.67% over 21 days · t = -6.43 · n = 111,973 statistically distinguishable from its control group |
| 2026-05-07 | Bollinger bandwidth breaks out of its own compression structure | -0.63% over 21 days · t = -2.80 · n = 7,196 statistically distinguishable from its control group |
Excess return against a matched control group, on a point-in-time universe that includes delisted companies. Most families do not survive that. How the measurement works →
Insider transactions (Form 4)
| date | insider | what | shares | price | value |
|---|---|---|---|---|---|
| 2026-07-22 | Green Jeremy Director | Shares withheld for tax | 60 | — | — |
| 2026-07-22 | Green Jeremy Director | Option exercise | 195.2K | — | — |
| 2026-07-22 | Redmile Group, LLC Director | Shares withheld for tax | 60 | — | — |
| 2026-07-22 | Redmile Group, LLC Director | Option exercise | 195.2K | — | — |
| 2026-06-11 | Cherry Brian N Director | Grant or award | 24.0K | 0.00 | 0 |
| 2026-06-09 | Fust Matthew K Director | Grant or award | 12.0K | 0.00 | 0 |
| 2026-06-09 | Ciongoli Gregory Austin Director | Grant or award | 12.0K | 0.00 | 0 |
| 2026-06-09 | HEIDEN WILLIAM K Director | Grant or award | 12.0K | 0.00 | 0 |
| 2026-05-18 | Nguyen AnhCo President and CEO | Open-market sale | 5.2K | 9.13 | 47.8K |
| 2026-05-18 | Grant-Huerta Yanina Chief Accounting Officer | Open-market sale | 2.4K | 9.13 | 22.0K |
Open-market purchases (code P) are the informative ones. Grants, option exercises and tax withholding are compensation mechanics, not decisions. How to read a Form 4 →
Largest institutional holders
| manager | value | shares |
|---|---|---|
| ADAGE CAPITAL PARTNERS GP, L.L.C. | 3.3M | 700.0K |
| Redmile Group, LLC | 2.1M | 441.7K |
| MACKENZIE FINANCIAL CORP | 1.5M | 313.6K |
| VANGUARD CAPITAL MANAGEMENT LLC | 1.0M | 217.9K |
| Point72 Asset Management, L.P. | 918.9K | 194.3K |
| EcoR1 Capital, LLC | 471.1K | 99.6K |
| BlackRock, Inc. | 373.8K | 79.0K |
| GEODE CAPITAL MANAGEMENT, LLC | 313.0K | 66.1K |
| UBS Group AG | 236.8K | 50.1K |
| STALEY CAPITAL ADVISERS INC | 236.5K | 50.0K |
13F positions as of 2026-03-31, filed up to 45 days after quarter end. Long-only US equity — shorts and derivatives never appear. What 13F does and does not show →
Short selling
This is off-exchange short volume, not short interest: it is flow, not position, and 40–50% is normal because market makers short to fill your buy. Why that number misleads →
Recent headlines
- Atara Biotherapeutics, Inc. (ATRA) filed form 8-K · 2026-08-12 · SEC EDGAR
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