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GROUP ONE TRADING LLC

Position in IRM — Iron Mountain Inc

CIK 932540 CHICAGO, IL

Position in IRM

as of Mar 31, 2026 · filed May 13, 2026
Position Value
$526,123
+$4,036 QoQ
Shares Held
5,151
-18.2% QoQ
Ownership
0.002%
of shares outstanding
% of Portfolio
0.02%
of 13F equity value
Holder Rank
not a current holder
Holding Since
Dec 2021
7 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 Mar 31, 2026

GROUP ONE TRADING LLC holds $9,447,146 across 9 REIT - Specialty names. IRM ranks #5 (5.6% of the industry book) .

# Ticker Company Shares Value (USD) Open
5 IRM
Iron Mountain Inc
This page
5,151 $526,123

All Filings in IRM

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7 filing rows on record
Report Date Value (USD) Shares
2026-03-31 $526,123 5,151
2025-12-31 $522,087 6,294
2025-09-30 $966,697 9,483
2025-06-30 $671,115 6,543
2023-12-31 $72,569 1,037
2022-03-31 $434,137 7,835
2021-12-31 $36,735 702