ATRA US Equity
Atara Biotherapeutics, Inc.Health Care · Biological Products, (No Diagnostic Substances) · CIK 1604464 · FY ends Dec 31$9.60
+0.88 (+10.09%)
USD · as of 2026-08-19 · marketstack
Short interest· FINRA consolidated · settlement 2026-07-31
6 settlement cycles| Shares short | 537K |
| % of shares out | 5.3% |
| Days to cover | 9.4 |
| Δ vs 2026-07-15 | -7.0% |
bars = shares short · line = days to cover (own scale)
| Settlement | Shares short | Δ vs prior | Avg daily volume | Days to cover |
|---|
| 2026-07-31 | 536,897 | -7.0% | 57,166 | 9.4 |
| 2026-07-15 | 577,635 | +59.8% | 92,530 | 6.2 |
| 2026-06-30 | 361,520 | -26.6% | 91,505 | 4.0 |
| 2026-06-15 | 492,405 | +1.6% | 78,554 | 6.3 |
| 2026-05-29 | 484,391 | -11.4% | 166,237 | 2.9 |
| 2026-05-15 | 546,470 | +78.5% | 7,386,437 | 1.0 |
FINRA Rule 4560 · twice monthly, published ~a week later.
Output of a disclosed model — assumptions may be wrong. Research, not investment advice. See the Disclaimer.
