ATRA

Atara Biotherapeutics, Inc.

Company with tickers: ATRA

CIK
1604464
CUSIP
046513206
Shares Outstanding
8,178,114

Short Interest History

Settlement Date Current Position Previous Position Change Days to Cover
2026-03-13 313,290 330,524 -17,234 1.00
2026-02-27 330,524 209,287 +121,237 2.13
2026-02-13 209,287 282,525 -73,238 2.40
2026-01-30 282,525 1,016,616 -734,091 1.00
2026-01-15 1,016,616 169,201 +847,415 1.00
2025-12-31 169,201 166,856 +2,345 2.56
2025-12-15 166,856 164,713 +2,143 2.01
2025-11-28 164,713 176,777 -12,064 2.79
2025-11-14 176,777 168,549 +8,228 2.37
2025-10-31 168,549 128,849 +39,700 3.72
2025-10-15 128,849 149,590 -20,741 2.11
2025-09-30 149,590 161,507 -11,917 2.51
2025-09-15 161,507 173,825 -12,318 3.51
2025-08-29 173,825 196,215 -22,390 3.16
2025-08-15 196,215 210,641 -14,426 4.39
2025-07-31 210,641 268,036 -57,395 2.45
2025-07-15 268,036 266,647 +1,389 7.64
2025-06-30 266,647 285,774 -19,127 7.21
2025-06-13 285,774 367,405 -81,631 4.82
2025-05-30 367,405 412,857 -45,452 4.80
2025-05-15 412,857 522,139 -109,282 5.75
2025-04-30 522,139 662,188 -140,049 13.38
2025-04-15 662,188 666,785 -4,597 12.12
2025-03-31 666,785 723,264 -56,479 13.54