Atara Biotherapeutics, Inc. short interest in 2025
In 2025, Atara Biotherapeutics, Inc.'s disclosed short interest ran from 9.51% of shares outstanding on 15 Jan 2025 to 2.35% on 31 Dec 2025, a change of -7.16 percentage points. The year's high was 12.34% on 14 Mar 2025 and its low 1.83% on 15 Oct 2025, averaging 5.99% across 24 twice-monthly settlement dates. FINRA's days-to-cover figure peaked at 13.54 days on 31 Mar 2025. Full history: Atara Biotherapeutics, Inc..
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By year: 2018 · 2019 · 2020 · 2021 · 2022 · 2023 · 2024 · 2025 · 2026
2025 in figures
- Start of year
- 9.51% (15 Jan 2025)
- End of year
- 2.35% (31 Dec 2025)
- Change
- -7.16 pp
- High
- 12.34% (14 Mar 2025)
- Low
- 1.83% (15 Oct 2025)
- Average
- 5.99%
- Highest days to cover
- 13.54 (31 Mar 2025)
- SEC filings marked
- 10
Every report in 2025
| Settlement | Short interest | Days to cover | Filings since previous |
|---|---|---|---|
| 15 Jan 2025 | 9.51% | 2.34 | |
| 31 Jan 2025 | 12.27% | 1.15 | results (8-K) |
| 14 Feb 2025 | 11.71% | 5.58 | |
| 28 Feb 2025 | 12.21% | 8.78 | |
| 14 Mar 2025 | 12.34% | 12.23 | 10-K filed, results (8-K) |
| 31 Mar 2025 | 11.38% | 13.54 | |
| 15 Apr 2025 | 11.30% | 12.12 | |
| 30 Apr 2025 | 8.91% | 13.38 | |
| 15 May 2025 | 7.05% | 5.75 | 10-Q filed, results (8-K) |
| 30 May 2025 | 6.27% | 4.80 | |
| 13 Jun 2025 | 4.88% | 4.82 | |
| 30 Jun 2025 | 4.55% | 7.21 | |
| 15 Jul 2025 | 4.57% | 7.64 | results (8-K) |
| 31 Jul 2025 | 3.60% | 2.45 | |
| 15 Aug 2025 | 2.79% | 4.39 | 10-Q filed, results (8-K) |
| 29 Aug 2025 | 2.48% | 3.16 | |
| 15 Sep 2025 | 2.30% | 3.51 | |
| 30 Sep 2025 | 2.13% | 2.51 | |
| 15 Oct 2025 | 1.83% | 2.11 | |
| 31 Oct 2025 | 2.40% | 3.72 | |
| 14 Nov 2025 | 2.45% | 2.37 | 10-Q filed, results (8-K) |
| 28 Nov 2025 | 2.28% | 2.79 | |
| 15 Dec 2025 | 2.31% | 2.01 | |
| 31 Dec 2025 | 2.35% | 2.56 |
See also: Atara Biotherapeutics, Inc.'s full history · most shorted US stocks of 2025 · today's US league.
About this data
US short interest data: FINRA (finra.org), shown as reported shares short divided by SEC-reported shares outstanding for each settlement date. FINRA® is a registered trademark of the Financial Industry Regulatory Authority, Inc. This site is not affiliated with or endorsed by FINRA or the SEC; displayed for personal reference, bulk redistribution is not permitted (see terms). Nothing here is investment advice. Method: methodology.