Iron Mountain Inc. short interest in 2021

In 2021, Iron Mountain Inc.'s disclosed short interest ran from 17.28% of shares outstanding on 15 Jan 2021 to 9.07% on 31 Dec 2021, a change of -8.21 percentage points. The year's high was 17.28% on 15 Jan 2021 and its low 9.07% on 31 Dec 2021, averaging 11.29% across 24 twice-monthly settlement dates. FINRA's days-to-cover figure peaked at 24.75 days on 15 Apr 2021. Full history: Iron Mountain Inc..

Cite this page

Plain

Short position data for Iron Mountain Inc. short interest in 2021: FINRA, compiled by howshorted.com, settlement date 31 Dec 2021. https://howshorted.com/us/company/irm/2021/

Wikipedia

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

BibTeX

@misc{howshorted-iron-mountain-inc-short-interest-in-2021-2021-12-31,
  title        = {Iron Mountain Inc. short interest in 2021 short position data},
  author       = {{HowShorted}},
  howpublished = {\url{https://howshorted.com/us/company/irm/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: 17.28% (15 Jan 2021)
End of year: 9.07% (31 Dec 2021)
Change: -8.21 pp
High: 17.28% (15 Jan 2021)
Low: 9.07% (31 Dec 2021)
Average: 11.29%
Highest days to cover: 24.75 (15 Apr 2021)
SEC filings marked: 8

Every report in 2021

Iron Mountain Inc. short interest in 2021
Settlement	Short interest	Days to cover	Filings since previous
15 Jan 2021	17.28%	16.65
29 Jan 2021	11.79%	4.70
12 Feb 2021	12.08%	12.18
26 Feb 2021	12.64%	12.98	10-K filed, results (8-K)
15 Mar 2021	13.75%	15.10
31 Mar 2021	12.96%	19.08
15 Apr 2021	13.09%	24.75
30 Apr 2021	12.60%	18.15
14 May 2021	12.14%	14.47	10-Q filed, results (8-K)
28 May 2021	11.56%	14.30
15 Jun 2021	11.97%	15.35
30 Jun 2021	10.49%	12.41
15 Jul 2021	9.90%	14.30
30 Jul 2021	9.95%	19.51
13 Aug 2021	9.77%	21.99	10-Q filed, results (8-K)
31 Aug 2021	9.58%	22.16
15 Sep 2021	10.12%	17.68
30 Sep 2021	10.00%	18.69
15 Oct 2021	10.03%	20.49
29 Oct 2021	9.94%	23.89
15 Nov 2021	10.34%	16.61	10-Q filed, results (8-K)
30 Nov 2021	10.18%	18.40
15 Dec 2021	9.82%	15.45
31 Dec 2021	9.07%	13.29

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.