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DUFF & PHELPS INVESTMENT MANAGEMENT CO

Position in IRM — Iron Mountain Inc

CIK 765443 CHICAGO, IL

Position in IRM

as of Jun 30, 2026 · filed Aug 13, 2026
Position Value
$183,835,993
+$22,931,073 QoQ
Shares Held
1,455,435
-7.6% QoQ
Ownership
0.489%
of shares outstanding
% of Portfolio
1.75%
of 13F equity value
Holder Rank
#30
of 1,151 holders
Holding Since
Sep 2023
12 quarters on record
Voting authority Sole 26% Shared 14% None 60%

Common Shares in IRM Over Time

Shares Held

Position Value (USD)

Position in REIT - Specialty

Real Estate · as of Jun 30, 2026

DUFF & PHELPS INVESTMENT MANAGEMENT CO holds $1,278,962,351 across 8 REIT - Specialty names. IRM ranks #3 (14.4% of the industry book) .

# Ticker Company Shares Value (USD) Open
3 IRM
Iron Mountain Inc
This page
1,455,435 $183,835,993

All Filings in IRM

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12 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $183,835,993 1,455,435
2026-03-31 $160,904,920 1,575,337
2025-12-31 $131,098,493 1,580,452
2025-09-30 $167,393,023 1,642,074
2025-06-30 $151,042,428 1,472,579
2025-03-31 $114,533,092 1,331,161
2024-12-31 $130,999,749 1,246,311
2024-09-30 $147,421,210 1,240,606
2024-06-30 $116,356,334 1,298,330
2024-03-31 $71,844,498 895,705
2023-12-31 $3,923,778 56,070
2023-09-30 $2,603,315 43,790