Atara Biotherapeutics, Inc. short interest in 2020

In 2020, Atara Biotherapeutics, Inc.'s disclosed short interest ran from 18.59% of shares outstanding on 15 Jan 2020 to 15.43% on 31 Dec 2020, a change of -3.16 percentage points. The year's high was 25.00% on 15 Jul 2020 and its low 15.43% on 31 Dec 2020, averaging 19.10% across 24 twice-monthly settlement dates. FINRA's days-to-cover figure peaked at 33.02 days on 15 Oct 2020. Full history: Atara Biotherapeutics, Inc..

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Plain

Short position data for Atara Biotherapeutics, Inc. short interest in 2020: FINRA, compiled by howshorted.com, settlement date 31 Dec 2020. https://howshorted.com/us/company/atra/2020/

Wikipedia

<ref>{{cite web |title=Atara Biotherapeutics, Inc. short interest in 2020 short position data |url=https://howshorted.com/us/company/atra/2020/ |website=HowShorted |publisher=howshorted.com (data: FINRA) |date=2020-12-31 |access-date=2026-10-13}}</ref>

BibTeX

@misc{howshorted-atara-biotherapeutics-inc-short-interest-2020-12-31,
  title        = {Atara Biotherapeutics, Inc. short interest in 2020 short position data},
  author       = {{HowShorted}},
  howpublished = {\url{https://howshorted.com/us/company/atra/2020/}},
  note         = {Data: FINRA, settlement date 31 Dec 2020; accessed 2026-10-13},
  year         = {2020}
}

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2020 in figures

Start of year: 18.59% (15 Jan 2020)
End of year: 15.43% (31 Dec 2020)
Change: -3.16 pp
High: 25.00% (15 Jul 2020)
Low: 15.43% (31 Dec 2020)
Average: 19.10%
Highest days to cover: 33.02 (15 Oct 2020)
SEC filings marked: 8

Every report in 2020

Atara Biotherapeutics, Inc. short interest in 2020
Settlement	Short interest	Days to cover	Filings since previous
15 Jan 2020	18.59%	14.72
31 Jan 2020	17.61%	15.76
14 Feb 2020	17.21%	24.41
28 Feb 2020	18.14%	13.95	10-K filed, results (8-K)
13 Mar 2020	18.00%	16.65
31 Mar 2020	18.19%	11.81
15 Apr 2020	18.90%	12.65
30 Apr 2020	20.32%	9.81
15 May 2020	21.30%	13.68	10-Q filed, results (8-K)
29 May 2020	20.13%	3.35
15 Jun 2020	19.88%	10.33
30 Jun 2020	23.00%	6.91
15 Jul 2020	25.00%	12.43
31 Jul 2020	18.99%	23.68
14 Aug 2020	19.66%	26.29	10-Q filed, results (8-K)
31 Aug 2020	20.54%	21.72
15 Sep 2020	18.46%	14.06
30 Sep 2020	19.07%	14.44
15 Oct 2020	20.78%	33.02
30 Oct 2020	19.71%	26.94
13 Nov 2020	17.67%	16.81	10-Q filed, results (8-K)
30 Nov 2020	15.88%	14.92
15 Dec 2020	16.03%	9.85
31 Dec 2020	15.43%	14.70

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.