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MILLENNIUM MANAGEMENT LLC

Position in IRM — Iron Mountain Inc

CIK 1273087 NEW YORK, NY

Position in IRM

as of Jun 30, 2026 · filed Aug 14, 2026
Position Value
$19,837,869
-$18,409,781 QoQ
Shares Held
157,057
-58.1% QoQ
Ownership
0.053%
of shares outstanding
% of Portfolio
0.02%
of 13F equity value
Holder Rank
#135
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)

Derivatives in IRM

reported options exposure · as of Jun 30, 2026
CallValue
$3,852,455
CallShares
30,500
PutValue
$8,159,626
PutShares
64,600

Notional value of option positions as reported on Form 13F. Calls and puts are disclosed separately and do not net against the common-share stake above.

Position in REIT - Specialty

Real Estate · as of Jun 30, 2026

MILLENNIUM MANAGEMENT LLC holds $956,559,496 across 15 REIT - Specialty names. IRM ranks #10 (2.1% of the industry book) .

# Ticker Company Shares Value (USD) Open

All Filings in IRM

Export CSV
50 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $3,852,455 30,500
2026-06-30 $19,837,869 157,057
2026-06-30 $8,159,626 64,600
2026-03-31 $980,544 9,600
2026-03-31 $6,884,236 67,400
2026-03-31 $38,247,650 374,463
2025-12-31 $6,188,070 74,600
2025-12-31 $978,810 11,800
2025-12-31 $40,563,711 489,014
2025-09-30 $2,110,158 20,700
2025-09-30 $49,483,408 485,417
2025-09-30 $3,598,482 35,300
2025-06-30 $4,420,767 43,100
2025-06-30 $2,502,708 24,400
2025-06-30 $59,077,140 575,969
2025-03-31 $4,792,428 55,700
2025-03-31 $59,874,719 695,894
2025-03-31 $3,519,036 40,900
2024-12-31 $504,528 4,800
2024-12-31 $5,612,874 53,400
2024-12-31 $3,070,578 29,213
2024-09-30 $404,022 3,400
2024-09-30 $15,357,826 129,242
2024-09-30 $475,320 4,000
2024-06-30 $6,993,675 78,037
2024-06-30 $1,263,642 14,100
2024-03-31 $3,705,702 46,200
2024-03-31 $76,882,648 958,517
2023-12-31 $244,930 3,500
2023-12-31 $4,244,636 60,655
2023-09-30 $5,652,862 95,086
2023-09-30 $630,170 10,600
2023-06-30 $5,772,912 101,600
2023-06-30 $25,039,835 440,687
2023-03-31 $6,370,364 120,400
2023-03-31 $9,040,943 170,874
2022-12-31 $1,510,455 30,300
2022-12-31 $1,741,110 34,927
2022-09-30 $1,332,291 30,300
2022-09-30 $13,311,301 302,736
2022-06-30 $35,498,272 729,067
2022-06-30 $4,182,471 85,900
2022-03-31 $8,325,518 150,253
2022-03-31 $29,123,496 525,600
2021-12-31 $10,828,332 206,924
2021-12-31 $21,962,901 419,700
2021-09-30 $16,693,490 384,200
2021-09-30 $1,768,415 40,700
2021-09-30 $7,726,887 177,834
2021-06-30 $14,695,027 347,236