Iron Mountain INC Schedule 13G passive stakes
Filed when an investor crosses five percent without intending to seek control — the passive counterpart to a 13D.
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Cohen & Steers, Inc. and its affiliates have reported beneficial ownership of 4.89% of Iron Mountain, Inc.'s common stock as of April 30, 2026.
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Vanguard Capital Management has disclosed a beneficial ownership of 7.35% in Iron Mountain Inc. as of March 31, 2026.
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Vanguard Portfolio Management has reported beneficial ownership of 8.42% of Iron Mountain Inc.'s common stock as of March 31, 2026.
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The Vanguard Group reported a 0% beneficial ownership in Iron Mountain Inc. following an internal realignment, disaggregating its reporting.
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Cohen & Steers, Inc. and its affiliates have disclosed a significant passive ownership stake in Iron Mountain, Inc., holding an aggregate of 6.46% of the common stock.
NYSE
Cohen & Steers, Inc. and its affiliates reported a collective beneficial ownership of 5.43% of Iron Mountain, Inc.'s common stock as of September 30, 2025.
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SCHEDULE 13G/A: Cohen & Steers Reduces Stake in Iron Mountain Below 5% Threshold
Investment firm Cohen & Steers, Inc. and its affiliates have reduced their beneficial ownership in Iron Mountain Incorporated to 4.35%, falling below the 5% reporting threshold.