Institutional Ownership
Atara Biotherapeutics Inc
CUSIP 046513206COM NEWATRAQ1 2026
Shares Short
577.6K
As of Jul 15, 2026
Days to Cover
6.24
Short shares ÷ avg daily volume
Change vs Prior
+59.8%
vs previous settlement
Avg Daily Volume
92.5K
FINRA reported ADV
Short Interest History
17 settlements on record · FINRA consolidated
Higher short interest is bearish: increases show red, decreases green.
| Settlement | Shares Short | Prior | Change | Avg Daily Vol | Days to Cover |
|---|---|---|---|---|---|
| Jul 15, 2026 | 577.6K | 361.5K | +59.8% | 92.5K | 6.24 |
| Jun 30, 2026 | 361.5K | 492.4K | -26.6% | 91.5K | 3.95 |
| Jun 15, 2026 | 492.4K | 484.4K | +1.6% | 78.6K | 6.27 |
| May 29, 2026 | 484.4K | 546.5K | -11.4% | 166.2K | 2.91 |
| May 15, 2026 | 546.5K | 306.1K | +78.5% | 7.39M | 1.00 |
| Apr 30, 2026 | 306.1K | 318.0K | -3.7% | 50.1K | 6.10 |
| Apr 15, 2026 | 318.0K | 327.1K | -2.8% | 77.6K | 4.10 |
| Mar 31, 2026 | 327.1K | 313.3K | +4.4% | 108.6K | 3.01 |
| Mar 13, 2026 | 313.3K | 330.5K | -5.2% | 864.9K | 1.00 |
| Feb 27, 2026 | 330.5K | 209.3K | +57.9% | 155.0K | 2.13 |
| Feb 13, 2026 | 209.3K | 282.5K | -25.9% | 87.2K | 2.40 |
| Jan 30, 2026 | 282.5K | 1.02M | -72.2% | 351.0K | 1.00 |