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ADAGE CAPITAL PARTNERS GP, L.L.C.

Position in IRM — Iron Mountain Inc

CIK 1165408 Boston, MA

Position in IRM

as of Jun 30, 2026 · filed Aug 14, 2026
Position Value
$67,595,049
+$7,327,138 QoQ
Shares Held
535,152
-9.3% QoQ
Ownership
0.180%
of shares outstanding
% of Portfolio
0.10%
of 13F equity value
Holder Rank
#67
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

ADAGE CAPITAL PARTNERS GP, L.L.C. holds $415,384,159 across 8 REIT - Specialty names. IRM ranks #4 (16.3% of the industry book) .

# Ticker Company Shares Value (USD) Open
4 IRM
Iron Mountain Inc
This page
535,152 $67,595,049

All Filings in IRM

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26 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $67,595,049 535,152
2026-03-31 $60,267,911 590,052
2025-12-31 $54,485,873 656,852
2025-09-30 $56,415,634 553,420
2025-06-30 $57,465,047 560,252
2025-03-31 $27,365,194 318,052
2024-12-31 $11,998,516 114,152
2024-09-30 $20,967,791 176,452
2024-06-30 $25,196,842 281,152
2024-03-31 $22,968,293 286,352
2023-12-31 $19,849,966 283,652
2023-09-30 $17,249,536 290,152
2023-06-30 $13,668,164 240,552
2023-03-31 $8,785,811 166,052
2022-12-31 $14,738,252 295,652
2022-09-30 $13,021,803 296,152
2022-06-30 $14,736,125 302,652
2022-03-31 $16,753,324 302,352
2021-12-31 $16,146,526 308,552
2021-09-30 $13,050,294 300,352
2021-06-30 $12,901,336 304,852
2021-03-31 $11,560,147 312,352
2020-12-31 $5,997,764 203,452
2020-09-30 $6,883,744 256,952
2020-06-30 $8,282,887 317,352
2020-03-31 $7,681,497 322,752