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COHEN & STEERS, INC.

Position in IRM — Iron Mountain Inc

CIK 1284812 NEW YORK, NY

Position in IRM

as of Jun 30, 2026 · filed Aug 14, 2026
Position Value
$1,518,212,727
-$133,323,762 QoQ
Shares Held
12,019,735
-25.7% QoQ
Ownership
4.04%
of shares outstanding
% of Portfolio
2.42%
of 13F equity value
Holder Rank
#5
of 1,152 holders
Holding Since
Jun 2020
24 quarters on record
Voting authority Sole 80% Shared 0% None 20%

Common Shares in IRM Over Time

Shares Held

Position Value (USD)

Position in REIT - Specialty

Real Estate · as of Jun 30, 2026

COHEN & STEERS, INC. holds $17,379,558,337 across 12 REIT - Specialty names. IRM ranks #5 (8.7% of the industry book) .

# Ticker Company Shares Value (USD) Open
5 IRM
Iron Mountain Inc
This page
12,019,735 $1,518,212,727

All Filings in IRM

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25 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $1,518,212,727 12,019,735
2026-03-31 $1,651,536,489 16,169,341
2025-12-31 $1,568,063,242 18,903,716
2025-09-30 $1,605,420,643 15,748,682
2025-06-30 $1,412,248,481 13,768,631
2025-03-31 $1,159,982,848 13,481,902
2025-02-28 $1,191,529,980 12,788,773
2024-12-31 $1,566,963,693 14,907,846
2024-09-30 $2,106,382,005 17,726,012
2024-06-30 $2,065,832,053 23,051,016
2024-03-31 $1,897,370,597 23,655,038
2023-12-31 $1,572,843,467 22,475,614
2023-09-30 $442,288,797 7,439,677
2023-06-30 $438,978,080 7,725,767
2023-03-31 $154,907,622 2,927,757
2022-12-31 $5,284 106
2022-09-30 $30,500,230 693,660
2022-06-30 $7,839 161
2022-03-31 $263,031 4,747
2021-12-31 $331,981 6,344
2021-06-30 $607,207 14,348
2021-03-31 $512,884 13,858
2020-12-31 $17,100,787 580,081
2020-09-30 $14,370,691 536,420
2020-06-30 $86,293,516 3,306,265