Portola Pharmaceuticals, Inc. short interest in 2019

In 2019, Portola Pharmaceuticals, Inc.'s disclosed short interest ran from 28.32% of shares outstanding on 15 Jan 2019 to 19.52% on 31 Dec 2019, a change of -8.80 percentage points. The year's high was 28.32% on 15 Jan 2019 and its low 17.89% on 13 Dec 2019, averaging 21.76% across 24 twice-monthly settlement dates. FINRA's days-to-cover figure peaked at 30.22 days on 31 Oct 2019. Full history: Portola Pharmaceuticals, Inc..

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Plain

Short position data for Portola Pharmaceuticals, Inc. short interest in 2019: FINRA, compiled by howshorted.com, settlement date 31 Dec 2019. https://howshorted.com/us/company/ptla-2021/2019/

Wikipedia

<ref>{{cite web |title=Portola Pharmaceuticals, Inc. short interest in 2019 short position data |url=https://howshorted.com/us/company/ptla-2021/2019/ |website=HowShorted |publisher=howshorted.com (data: FINRA) |date=2019-12-31 |access-date=2026-10-13}}</ref>

BibTeX

@misc{howshorted-portola-pharmaceuticals-inc-short-intere-2019-12-31,
  title        = {Portola Pharmaceuticals, Inc. short interest in 2019 short position data},
  author       = {{HowShorted}},
  howpublished = {\url{https://howshorted.com/us/company/ptla-2021/2019/}},
  note         = {Data: FINRA, settlement date 31 Dec 2019; accessed 2026-10-13},
  year         = {2019}
}

By year: 2018 · 2019 · 2020

2019 in figures

Start of year: 28.32% (15 Jan 2019)
End of year: 19.52% (31 Dec 2019)
Change: -8.80 pp
High: 28.32% (15 Jan 2019)
Low: 17.89% (13 Dec 2019)
Average: 21.76%
Highest days to cover: 30.22 (31 Oct 2019)
SEC filings marked: 9

Every report in 2019

Portola Pharmaceuticals, Inc. short interest in 2019
Settlement	Short interest	Days to cover	Filings since previous
15 Jan 2019	28.32%	7.69	results (8-K)
31 Jan 2019	27.83%	11.95
15 Feb 2019	25.32%	12.90
28 Feb 2019	22.93%	11.58
15 Mar 2019	23.27%	9.45	10-K filed, results (8-K)
29 Mar 2019	21.36%	18.00
15 Apr 2019	18.71%	12.11
30 Apr 2019	18.64%	14.80
15 May 2019	18.24%	10.12	10-Q filed, results (8-K)
31 May 2019	18.74%	12.00
14 Jun 2019	20.19%	12.80
28 Jun 2019	20.76%	12.47
15 Jul 2019	21.86%	19.70
31 Jul 2019	23.02%	22.78
15 Aug 2019	24.26%	7.81	10-Q filed, results (8-K)
30 Aug 2019	21.89%	15.89
13 Sep 2019	23.18%	14.18
30 Sep 2019	23.06%	16.96
15 Oct 2019	22.83%	24.65
31 Oct 2019	22.92%	30.22
15 Nov 2019	19.15%	15.58	10-Q filed, results (8-K)
29 Nov 2019	18.25%	19.08
13 Dec 2019	17.89%	18.35
31 Dec 2019	19.52%	16.43

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.