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IRON MTN INC DEL (IRM)

Name: IRON MTN INC DEL (IRM) — Institutional ownership, SEC filings and insider activity
Creator: Sightfile
License: https://www.sec.gov/privacy#dissemination

Institutional ownership, SEC filings and insider activity

Sector: Financials · SEC CIK 0001020569 · EDGAR filings · Updated 2026-07-07

IRON MTN INC DEL (IRM) has reported institutional ownership of 84.9%, with 1,079 institutional managers holding positions valued at $25.8B per the latest 13F reporting period.

Institutional ownership

84.9%

Institutional managers

1,079

Reported 13F value

$25.8B

Insider activity

130 trans.

−$132.0M net selling

Latest updates

2026-07-07 — Insider transaction reported (Form 4)
2026-07-07 — Insider transaction reported (Form 4)
2026-07-06 — Insider transaction reported (Form 4)
2026-07-02 — Insider transaction reported (Form 4)
2026-07-02 — Insider transaction reported (Form 4)
2026-07-01 — Notice of proposed sale filed (Form 144)
2026-07-01 — Notice of proposed sale filed (Form 144)
2026-06-26 — Current report (8-K) filed

Institutional ownership overview

According to SEC 13F filings tracked by Sightfile, IRON MTN INC DEL has 1,079 institutional holders and institutional ownership of 84.9%.

#	Institution	Reported value	% of tracked total
1	BlackRock, Inc.	$3.37B	13.1%
2	VANGUARD PORTFOLIO MANAGEMENT LLC	$2.56B	9.9%
3	VANGUARD CAPITAL MANAGEMENT LLC	$1.92B	7.4%
4	STATE STREET CORP	$1.81B	7.0%
5	COHEN & STEERS, INC.	$1.65B	6.4%
6	GEODE CAPITAL MANAGEMENT, LLC	$863.7M	3.3%
7	FMR LLC	$764.5M	3.0%
8	MORGAN STANLEY	$475.2M	1.8%
9	PRINCIPAL FINANCIAL GROUP INC	$466.4M	1.8%
10	DIMENSIONAL FUND ADVISORS LP	$464.9M	1.8%

Full holder history and quarter-over-quarter changes are available inside the app.

Insider activity

Insiders reported 130 transactions (1 buys, 68 sells) across 17 reporting insiders, with a net reported value of −$132.0M.

Quarterly net insider value, as reported in Form 4 filings.

Fails-to-deliver

The SEC's fails-to-deliver file for 2026-06-30 reports 5,187 failed-to-deliver shares ($674.2K) for IRM — an official data point published by the SEC, shown as reported.

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See full history, cross-references and alerts on Sightfile

Sightfile provides information only — not investment advice, recommendations, or an assessment of any security. Data is derived from official public sources (SEC EDGAR and U.S. government agencies), may contain errors or delays, and should be verified against the source filing before relying on it.
Data sources: SEC EDGAR (filings, 13F, FTD), aggregated by Sightfile. Page updated 2026-07-07.