ATRA
Atara Biotherapeutics, Inc.Company with tickers: ATRA
CIK
1604464
CUSIP
046513206
Shares Outstanding
9,010,172
Price History
Institutional Holders
Short Volume
Short Interest
Fails to Deliver
Financials
SEC Filings
Earnings Calls
Insider Trades
Congressional Trades
Short Volume (Last 90 Days)
| Date | Short Volume | Short Exempt | Total Volume | Short % |
|---|---|---|---|---|
| 2026-05-22 | 19,292 | 0 | 45,108 | 42.8% |
| 2026-05-21 | 9,151 | 50 | 25,059 | 36.5% |
| 2026-05-20 | 10,720 | 0 | 21,640 | 49.5% |
| 2026-05-19 | 51,505 | 0 | 112,485 | 45.8% |
| 2026-05-18 | 113,039 | 8,586 | 196,095 | 57.6% |
| 2026-05-15 | 59,788 | 8,143 | 110,545 | 54.1% |
| 2026-05-14 | 64,256 | 3,493 | 129,124 | 49.8% |
| 2026-05-13 | 226,471 | 642 | 375,595 | 60.3% |
| 2026-05-12 | 328,309 | 1,276 | 603,466 | 54.4% |
| 2026-05-11 | 205,196 | 25,319 | 375,193 | 54.7% |
| 2026-05-08 | 684,276 | 27,407 | 1,293,735 | 52.9% |
| 2026-05-07 | 20,652,045 | 189,190 | 35,115,187 | 58.8% |
| 2026-05-06 | 46,808 | 943 | 96,154 | 48.7% |
| 2026-05-05 | 19,137 | 728 | 36,277 | 52.8% |
| 2026-05-04 | 60,257 | 70 | 106,104 | 56.8% |
| 2026-05-01 | 10,227 | 1 | 18,359 | 55.7% |
| 2026-04-30 | 16,212 | 30 | 34,744 | 46.7% |
| 2026-04-29 | 19,936 | 0 | 31,126 | 64.0% |
| 2026-04-28 | 6,743 | 402 | 12,557 | 53.7% |
| 2026-04-27 | 18,000 | 3 | 32,196 | 55.9% |
| 2026-04-24 | 13,501 | 0 | 17,786 | 75.9% |
| 2026-04-23 | 11,499 | 20 | 17,813 | 64.6% |
| 2026-04-22 | 20,930 | 122 | 37,279 | 56.1% |
| 2026-04-21 | 8,626 | 0 | 16,492 | 52.3% |
| 2026-04-20 | 19,910 | 0 | 45,709 | 43.6% |
| 2026-04-17 | 25,974 | 384 | 45,592 | 57.0% |
| 2026-04-16 | 6,763 | 897 | 19,264 | 35.1% |
| 2026-04-15 | 12,620 | 0 | 22,931 | 55.0% |
| 2026-04-14 | 20,477 | 37 | 47,327 | 43.3% |
| 2026-04-13 | 18,056 | 0 | 39,000 | 46.3% |
| 2026-04-10 | 31,827 | 9,385 | 49,500 | 64.3% |
| 2026-04-09 | 30,766 | 3,508 | 64,904 | 47.4% |
| 2026-04-08 | 33,417 | 5,529 | 62,304 | 53.6% |
| 2026-04-07 | 9,940 | 330 | 16,495 | 60.3% |
| 2026-04-06 | 24,094 | 624 | 28,965 | 83.2% |