Atara Biotherapeutics, Inc. short interest in 2026

In 2026, Atara Biotherapeutics, Inc.'s disclosed short interest ran from 3.92% of shares outstanding on 30 Jan 2026 to 4.03% on 15 Sep 2026, a change of +0.11 percentage points. The year's high was 7.06% on 15 Jul 2026 and its low 2.90% on 13 Feb 2026, averaging 4.79% across 16 twice-monthly settlement dates. FINRA's days-to-cover figure peaked at 11.07 days on 31 Aug 2026. Full history: Atara Biotherapeutics, Inc..

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Plain

Short position data for Atara Biotherapeutics, Inc. short interest in 2026: FINRA, compiled by howshorted.com, settlement date 15 Sep 2026. https://howshorted.com/us/company/atra/2026/

Wikipedia

<ref>{{cite web |title=Atara Biotherapeutics, Inc. short interest in 2026 short position data |url=https://howshorted.com/us/company/atra/2026/ |website=HowShorted |publisher=howshorted.com (data: FINRA) |date=2026-09-15 |access-date=2026-10-13}}</ref>

BibTeX

@misc{howshorted-atara-biotherapeutics-inc-short-interest-2026-09-15,
  title        = {Atara Biotherapeutics, Inc. short interest in 2026 short position data},
  author       = {{HowShorted}},
  howpublished = {\url{https://howshorted.com/us/company/atra/2026/}},
  note         = {Data: FINRA, settlement date 15 Sep 2026; accessed 2026-10-13},
  year         = {2026}
}

By year: 2018 · 2019 · 2020 · 2021 · 2022 · 2023 · 2024 · 2025 · 2026

2026 in figures

Start of year: 3.92% (30 Jan 2026)
End of year: 4.03% (15 Sep 2026)
Change: +0.11 pp
High: 7.06% (15 Jul 2026)
Low: 2.90% (13 Feb 2026)
Average: 4.79%
Highest days to cover: 11.07 (31 Aug 2026)
SEC filings marked: 6

Every report in 2026

Atara Biotherapeutics, Inc. short interest in 2026
Settlement	Short interest	Days to cover	Filings since previous
30 Jan 2026	3.92%	1.00	results (8-K)
13 Feb 2026	2.90%	2.40
27 Feb 2026	4.58%	2.13
13 Mar 2026	3.83%	1.00
31 Mar 2026	4.00%	3.01	10-K filed, results (8-K)
15 Apr 2026	3.89%	4.10
30 Apr 2026	3.74%	6.10
15 May 2026	6.68%	1.00	10-Q filed
29 May 2026	5.92%	2.91
15 Jun 2026	6.02%	6.27
30 Jun 2026	4.42%	3.95
15 Jul 2026	7.06%	6.24
31 Jul 2026	6.57%	9.39
14 Aug 2026	4.75%	9.21	10-Q filed, results (8-K)
31 Aug 2026	4.26%	11.07
15 Sep 2026	4.03%	7.34

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.