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Asset Management One Co., Ltd.

Position in IRM — Iron Mountain Inc

CIK 1068855 TOKYO, M0

Position in IRM

as of Jun 30, 2026 · filed Jul 28, 2026
Position Value
$70,052,410
+$14,133,416 QoQ
Shares Held
554,607
+1.3% QoQ
Ownership
0.186%
of shares outstanding
% of Portfolio
0.21%
of 13F equity value
Holder Rank
#63
of 1,152 holders
Holding Since
Mar 2020
26 quarters on record
Voting authority Sole 100% Shared 0% None 0%

Common Shares in IRM Over Time

Shares Held

Position Value (USD)

Position in REIT - Specialty

Real Estate · as of Jun 30, 2026

Asset Management One Co., Ltd. holds $506,771,899 across 16 REIT - Specialty names. IRM ranks #3 (13.8% of the industry book) .

# Ticker Company Shares Value (USD) Open
3 IRM
Iron Mountain Inc
This page
554,607 $70,052,410

All Filings in IRM

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26 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $70,052,410 554,607
2026-03-31 $55,918,994 547,474
2025-12-31 $46,118,043 555,974
2025-09-30 $56,241,725 551,714
2025-06-30 $57,023,791 555,950
2025-03-31 $47,753,404 555,014
2024-12-31 $59,128,684 562,541
2024-09-30 $67,761,262 570,237
2024-06-30 $50,784,606 566,666
2024-03-31 $46,538,002 580,202
2023-12-31 $41,267,066 589,698
2023-09-30 $33,724,439 567,274
2023-06-30 $38,375,318 675,384
2023-03-31 $35,478,535 670,545
2022-12-31 $34,580,147 693,684
2022-09-30 $27,580,842 627,265
2022-06-30 $31,274,706 642,323
2022-03-31 $39,093,140 705,525
2021-12-31 $38,952,254 744,358
2021-09-30 $30,518,802 702,389
2021-06-30 $32,926,187 778,029
2021-03-31 $29,893,495 807,714
2020-12-31 $25,155,637 853,312
2020-09-30 $21,923,810 818,358
2020-06-30 $20,384,256 781,006
2020-03-31 $14,392,336 604,720