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IRM — IRON MTN INC DEL

Reported value held$16.75B
Funds holding (latest)49
SectorReal Estate

Index member: S&P 500

Funds holding (Q2 2026)42
Institutional value$12.82B · 102.13M sh
New / Add / Cut / Exit3 / 20 / 17 / 3
Top-5 / Top-10 concentration58.0% / 77.7%
Institutional holdings change Accumulating +6.9% (+6.55M sh)
Institutional value change Up +32.3%

As of Q2 2026, 42 SEC-registered investment managers reported holding IRM (IRON MTN INC DEL) in their latest 13F filings, with a combined reported value of $12.82B across 102.13M shares. That is +6.9% by share count (+6.55M shares) versus the previous quarter, while reported value moved +32.3%. Ownership is concentrated: the five largest holders account for 58.0% of reported value and the top ten for 77.7%.

Compared with the prior quarter, 3 opened new positions, 20 added to existing stakes, 17 trimmed, 3 exited entirely. 13F holdings are quarter-end snapshots, so these moves reflect positioning as of Q2 2026, not real-time trading.

IRM is a constituent of the S&P 500 and is classified in the Real Estate sector.

All figures on this page are computed from SEC Form 13F quarterly filings. 13F filers disclose long positions of $100,000 or more within 45 days of quarter end; short positions, options overlays and intra-quarter trades are not included, so treat the numbers as a quarterly snapshot of institutional ownership rather than real-time positioning.

FundQuarterSharesValuePortfolio WeightChange
BlackRock Inc history Q2 2026 33.57M $4.24B 0.07% Add
Vanguard Group history Q4 2025 46.63M $3.87B 0.06% Reduce
Geode Capital Management history Q2 2026 8.65M $1.09B 0.06% Add
Fidelity Management & Research (FMR) history Q2 2026 7.87M $994.36M 0.05% Add
Morgan Stanley history Q2 2026 4.43M $559.16M 0.03% Reduce
Principal Global Investors history Q2 2026 4.37M $552.40M 0.27% Reduce
Charles Schwab Investment Management history Q2 2026 4.26M $538.52M 0.07% Add
Northern Trust Corp history Q2 2026 4.22M $533.40M 0.06% Add
Norges Bank Investment Management history Q2 2026 4.21M $532.36M 0.05% Reduce
Invesco Ltd history Q2 2026 4.07M $513.53M 0.04% Add
Legal & General Investment Management America history Q2 2026 3.24M $409.84M 0.09% Add
Deutsche Bank AG history Q2 2026 3.05M $385.13M 0.12% Reduce
Goldman Sachs Group history Q2 2026 2.82M $356.54M 0.03% Add
JPMorgan Chase & Co history Q2 2026 2.21M $287.51M 0.03% New
AQR Capital Management history Q2 2026 2.13M $266.50M 0.09% Add
Prudential Financial history Q2 2026 1.97M $249.35M 0.27% Reduce
BNY Mellon history Q2 2026 1.60M $202.11M 0.03% Reduce
Capital World Investors history Q2 2026 1.22M $153.74M 0.02% Reduce
Amundi US history Q2 2026 1.17M $147.58M 0.04% Add
Bank of America Corp history Q2 2026 1.12M $141.32M 0.01% Reduce

View all 49 fund holders →

New Positions (Q2 2026)

Fully Exited (vs previous quarter)

Fund Position History — shares by quarter (top 20 funds)

FundQ3 2021Q4 2021Q1 2022Q2 2022Q3 2022Q4 2022Q1 2023Q2 2023Q3 2023Q4 2023Q1 2024Q2 2024Q3 2024Q4 2024Q1 2025Q2 2025Q3 2025Q4 2025Q1 2026Q2 2026
BlackRock Inc — — — — — — — — — — — — 31.31M 32.07M 35.22M 31.28M 31.71M 32.92M 33.02M 33.57M
Geode Capital Management 6.33M 6.41M 6.60M 6.72M 6.77M 6.94M 7.78M 7.39M 7.54M 7.06M 7.32M 8.13M 8.26M 7.91M 8.28M 8.09M 8.19M 8.29M 8.49M 8.65M
Fidelity Management & Research (FMR) 4.16M 3.98M 4.00M 3.97M 3.77M 3.73M 3.81M 3.73M 3.38M 3.52M 2.97M 3.29M 611.05K 667.74K 5.29M 6.70M 7.86M 7.98M 7.48M 7.87M
Morgan Stanley 4.20M 2.85M 4.05M 4.68M 5.37M 5.06M 4.86M 4.38M 4.22M 3.69M 3.46M 3.66M 3.64M 3.39M 3.39M 3.51M 3.61M 3.60M 4.65M 4.43M
Principal Global Investors 370.90K 363.33K 359.42K 373.58K 362.67K 355.76K 357.41K 343.69K 353.66K 337.25K 347.26K 340.77K 352.45K 415.37K 904.18K 2.58M 2.53M 4.21M 4.57M 4.37M
Charles Schwab Investment Management 3.41M 3.46M 3.57M 3.56M 3.61M 3.74M 3.78M 3.80M 3.08M 3.16M 3.23M 3.24M 3.39M 3.48M 3.49M 3.63M 3.67M 3.88M 4.01M 4.26M
Northern Trust Corp 4.26M 4.56M 4.19M 3.34M 3.20M 3.74M 3.79M 3.87M 3.91M 3.13M 2.92M 2.97M 2.77M 4.33M 4.27M 4.07M 4.03M 4.15M 4.15M 4.22M
Norges Bank Investment Management — — — — — 1.96M — — — 3.26M — 3.24M — 3.31M — 4.09M — 4.45M — 4.21M
Invesco Ltd 4.26M 4.30M 2.05M 2.08M 3.95M 4.15M 2.21M 2.17M 3.24M 3.42M 2.01M 2.26M 2.12M 2.48M 2.85M 4.29M 5.07M 4.42M 3.92M 4.07M
Legal & General Investment Management America 1.92M 1.86M 2.01M 2.09M 2.15M 2.05M 2.11M 2.28M 2.20M 2.60M 2.61M 3.90M 3.96M 3.18M 3.18M 3.28M 3.22M 3.36M 3.14M 3.24M
Deutsche Bank AG 1.96M 1.88M 1.62M 1.79M 4.02M 4.15M 4.58M 4.54M 4.57M 4.68M 3.85M 3.92M 3.48M 3.25M 3.14M 3.43M 2.89M 2.54M 3.09M 3.05M
Goldman Sachs Group 864.50K 1.06M 887.72K 944.10K 879.94K 904.10K 1.06M 834.13K 880.71K 940.09K 820.31K 1.63M 1.51M 1.06M 1.97M 1.88M 1.53M 1.52M 2.22M 2.82M
JPMorgan Chase & Co 2.38M 2.48M 2.18M 1.92M 1.64M 1.81M 1.68M 1.96M 1.59M 2.10M 2.46M 2.12M 2.19M 1.75M 2.06M 1.97M 2.06M 1.93M — 2.21M
AQR Capital Management 34.64K 32.16K 26.27K 24.59K 30.35K 26.94K 31.52K 41.77K 29.22K 24.21K 49.92K 50.24K 163.70K 203.86K 65.17K 106.01K 457.47K 923.20K 1.85M 2.13M
Prudential Financial 245.94K 250.67K 249.43K 246.40K 474.81K 256.94K 470.71K 1.31M 1.24M 2.23M 1.86M 2.10M 1.61M 1.36M 1.34M 1.95M 2.11M 2.31M 2.42M 1.97M
BNY Mellon 3.22M 3.15M 2.89M 3.01M 3.00M 2.59M 2.51M 2.37M 2.31M 2.24M 2.12M 2.13M 2.08M 2.03M 1.86M 1.75M 1.67M 1.69M 1.62M 1.60M
Capital World Investors 32.71M 32.71M 28.90M 28.91M 24.68M 25.48M 25.49M 20.36M 18.84M 4.12M 4.12M 4.12M 4.12M 3.82M 2.12M 2.12M 2.12M 2.12M 1.87M 1.22M
Amundi US 2.73M 3.33M 3.53M 3.69M 3.61M 3.73M 3.18M 3.81M 2.65M 2.44M 2.98M 2.25M 1.62M 1.44M 1.10M 1.60M 1.09M 1.33M 1.09M 1.17M
Bank of America Corp 1.57M 1.77M 837.26K 857.58K 834.40K 957.26K 1.52M 886.64K 946.77K 1.15M 1.32M 1.31M 1.26M 1.48M 1.12M 1.25M 1.25M 1.51M 1.40M 1.12M
UBS Group AG 631.44K 590.47K 710.31K 600.39K 567.82K 798.50K 604.76K 862.31K 892.45K 824.25K 1.00M 648.09K 1.06M 903.26K 1.15M 1.80M 1.44M 811.81K 817.33K 922.70K

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