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JANUS HENDERSON GROUP PLC

Position in IRM — Iron Mountain Inc

CIK 1274173 LONDON, X0

Position in IRM

as of Mar 31, 2026 · filed May 18, 2026
Position Value
$3,397,789
+$243,036 QoQ
Shares Held
33,266
-12.5% QoQ
Ownership
0.011%
of shares outstanding
% of Portfolio
0.00%
of 13F equity value
Holder Rank
not a current holder
Holding Since
Mar 2020
25 quarters on record
Voting authority Sole 0.ToString("F0")% Shared 69.04346780496603.ToString("F0")% None 30.95653219503397.ToString("F0")%

Common Shares in IRM Over Time

Shares Held

Position Value (USD)

Position in REIT - Specialty

Real Estate · as of Mar 31, 2026

JANUS HENDERSON GROUP PLC holds $658,220,661 across 13 REIT - Specialty names. IRM ranks #7 (0.5% of the industry book) .

# Ticker Company Shares Value (USD) Open
7 IRM
Iron Mountain Inc
This page
33,266 $3,397,789

All Filings in IRM

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25 filing rows on record
Report Date Value (USD) Shares
2026-03-31 $3,397,789 33,266
2025-12-31 $3,154,753 38,032
2025-09-30 $3,817,040 37,444
2025-06-30 $5,552,831 54,137
2025-03-31 $4,230,672 49,171
2024-12-31 $3,926,593 37,357
2024-09-30 $7,752,943 65,244
2024-06-30 $6,246,871 69,704
2024-03-31 $3,463,868 43,185
2023-12-31 $3,133,914 44,783
2023-09-30 $2,622,398 44,111
2023-06-30 $4,851,745 85,388
2023-03-31 $3,747,773 70,833
2022-12-31 $1,903,222 38,179
2022-09-30 $1,678,861 38,182
2022-06-30 $1,853,140 38,060
2022-03-31 $61,019,096 1,101,229
2021-12-31 $82,627,604 1,578,972
2021-09-30 $41,671,548 959,069
2021-06-30 $16,301,706 385,201
2021-03-31 $4,004,074 108,189
2020-12-31 $3,765,627 127,735
2020-09-30 $3,663,586 136,752
2020-06-30 $3,329,942 127,584
2020-03-31 $1,765,222 74,169