COHEN & STEERS, INC. - 31 Dec 2025 SCHEDULE 13G/A Report for Iron Mountain, Inc. Common Stock (IRM)

Filing Manager
COHEN & STEERS, INC.
Reporting Manager
Cohen & Steers, Inc.
Security
Iron Mountain, Inc. Common Stock
Symbol
IRM
Shares outstanding
295,766,873 shares
Disclosed Ownership
19,106,540 shares
Ownership
6.5%
Form type
SCHEDULE 13G/A
Filing time
13 Feb 2026, 08:30:02 UTC
Date of event
31 Dec 2025
Previous filing
14 Nov 2025
SEC
View on sec.gov

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Quoteable Key Fact

"COHEN & STEERS, INC. disclosed 6.5% ownership in Iron Mountain, Inc. Common Stock (IRM) on 31 Dec 2025."

Quick Takeaways

  • COHEN & STEERS, INC. filed SCHEDULE 13G/A for Iron Mountain, Inc. Common Stock (IRM).
  • Disclosed ownership: 6.5%.
  • Date of event: 31 Dec 2025.

What Changed

  • Previous schedule filing date: 14 Nov 2025.
  • Current filing was accepted on 13 Feb 2026, 08:30.

Why This Matters

  • This page explains what this Schedule 13D/13G filing tells you before manager-level rows.
  • You can verify ownership claims directly against the original SEC filing.

Official SEC Source

Backed by Schedule 13D/13G

Beneficial ownership values are sourced from the original SEC Schedule 13D/13G filing.

See Original Filing

Reporting Managers (5)

Name Ownership Shares Owned sole voting power shared voting power Signature Title CIK
Cohen & Steers, Inc. 6.5% 19,106,540 14,634,540 0 /s/ Nargis Hilal SVP, Global Chief Compliance Officer & Associate General Counsel
Cohen & Steers Capital Management, Inc. 6.4% 18,919,035 14,547,245 0 /s/ Nargis Hilal SVP, Global Chief Compliance Officer & Associate General Counsel
Cohen & Steers UK Limited 0.06% 167,379 67,169 0 /s/ Nargis Hilal SVP, Global Chief Compliance Officer & Associate General Counsel
Cohen & Steers Asia Limited 0% 0 0 0 /s/ Catherine Cheng VP, Compliance Officer
Cohen & Steers Ireland Limited 0.01% 20,126 20,126 0 /s/ Alan Cooper VP, Compliance Officer

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