PACIFIC BIOSCIENCES OF CALIFORNIA, INC. short interest in 2021

In 2021, PACIFIC BIOSCIENCES OF CALIFORNIA, INC.'s disclosed short interest ran from 7.30% of shares outstanding on 15 Jan 2021 to 9.03% on 31 Dec 2021, a change of +1.73 percentage points. The year's high was 9.17% on 15 Dec 2021 and its low 4.61% on 26 Feb 2021, averaging 6.93% across 24 twice-monthly settlement dates. FINRA's days-to-cover figure peaked at 10.64 days on 29 Oct 2021. Full history: PACIFIC BIOSCIENCES OF CALIFORNIA, INC..

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Plain

Short position data for PACIFIC BIOSCIENCES OF CALIFORNIA, INC. short interest in 2021: FINRA, compiled by howshorted.com, settlement date 31 Dec 2021. https://howshorted.com/us/company/pacb/2021/

Wikipedia

<ref>{{cite web |title=PACIFIC BIOSCIENCES OF CALIFORNIA, INC. short interest in 2021 short position data |url=https://howshorted.com/us/company/pacb/2021/ |website=HowShorted |publisher=howshorted.com (data: FINRA) |date=2021-12-31 |access-date=2026-10-13}}</ref>

BibTeX

@misc{howshorted-pacific-biosciences-of-california-inc-sh-2021-12-31,
  title        = {PACIFIC BIOSCIENCES OF CALIFORNIA, INC. short interest in 2021 short position data},
  author       = {{HowShorted}},
  howpublished = {\url{https://howshorted.com/us/company/pacb/2021/}},
  note         = {Data: FINRA, settlement date 31 Dec 2021; accessed 2026-10-13},
  year         = {2021}
}

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

2021 in figures

Start of year: 7.30% (15 Jan 2021)
End of year: 9.03% (31 Dec 2021)
Change: +1.73 pp
High: 9.17% (15 Dec 2021)
Low: 4.61% (26 Feb 2021)
Average: 6.93%
Highest days to cover: 10.64 (29 Oct 2021)
SEC filings marked: 10

Every report in 2021

PACIFIC BIOSCIENCES OF CALIFORNIA, INC. short interest in 2021
Settlement	Short interest	Days to cover	Filings since previous
15 Jan 2021	7.30%	2.28	results (8-K)
29 Jan 2021	7.21%	3.03
12 Feb 2021	5.03%	2.25	results (8-K)
26 Feb 2021	4.61%	1.79	10-K filed
15 Mar 2021	5.94%	2.27
31 Mar 2021	6.67%	4.13
15 Apr 2021	6.08%	4.46
30 Apr 2021	6.86%	6.00	results (8-K)
14 May 2021	7.07%	4.10	10-Q filed
28 May 2021	6.88%	6.76
15 Jun 2021	6.94%	7.85
30 Jun 2021	6.88%	5.52
15 Jul 2021	6.16%	7.57
30 Jul 2021	6.00%	4.90	results (8-K)
13 Aug 2021	5.86%	5.27	results (8-K), 10-Q filed
31 Aug 2021	6.38%	7.17
15 Sep 2021	6.53%	9.51
30 Sep 2021	7.13%	8.39
15 Oct 2021	7.80%	7.52
29 Oct 2021	8.91%	10.64
15 Nov 2021	8.11%	8.46	results (8-K), 10-Q filed
30 Nov 2021	7.69%	6.71
15 Dec 2021	9.17%	7.26
31 Dec 2021	9.03%	8.15

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.