XT
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XTX Topco’s Iron Mountain IRM Stock Holding History

XTX Topco’s Portfolio IRM Stock Details IRM Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$1.82M Sell
14,433
-11,032
-43% -$1.35M 0.02% 1197
2026
Q1 		$2.6M Buy
+25,465
New +$2.53M 0.05% 653
2025
Q3 		– Sell
-2,702
Closed -$277K – 2890
2025
Q2 		$277K Buy
+2,702
New +$255K 0.01% 1490
2025
Q1 		– Sell
-2,124
Closed -$223K – 2721
2024
Q4 		$223K Buy
+2,124
New +$250K 0.02% 1472
2024
Q3 		– Sell
-6,809
Closed -$610K – 2330
2024
Q2 		$610K Sell
6,809
-8,134
-54% -$658K 0.05% 560
2024
Q1 		$1.2M Buy
+14,943
New +$1.08M 0.16% 112
2023
Q4 		– Sell
-10,529
Closed -$626K – 1837
2023
Q3 		$626K Buy
+10,529
New +$643K 0.11% 274
2023
Q1 		– Sell
-6,496
Closed -$324K – 1469
2022
Q4 		$324K Buy
6,496
+178
+3% +$8.99K 0.07% 535
2022
Q3 		$278K Buy
+6,318
New +$319K 0.07% 558
2021
Q4 		– Sell
-9,344
Closed -$406K – 839
2021
Q3 		$406K Buy
9,344
+3,186
+52% +$143K 0.14% 251
2021
Q2 		$261K Buy
+6,158
New +$258K 0.09% 441

Other funds holding IRM

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Cohen & Steers
Cohen & Steers New York $63.2B AUM 17.15% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return
Principal Financial Group
Principal Financial Group Des Moines, Iowa $204B AUM 27.99% 1-Year Est. Return

XTX Topco's IRM Position: Q2 2026 in Review

XTX Topco reduced its Iron Mountain (IRM) stake by 43% in Q2 2026, selling an estimated $1.35M and leaving 14,433 shares worth $1.82M. The position accounts for 0.02% of the portfolio, ranked #1197.

XTX Topco first reported a position in IRM in Q2 2021 and has held it in 11 quarters since. The position peaked at $2.6M in Q1 2026. 1,172 funds tracked by Wall St. Rank hold IRM as of Q2 2026.

  • XTX Topco held 14,433 shares of Iron Mountain worth $1.82M as of Q2 2026.
  • XTX Topco sold 11,032 Iron Mountain shares in Q2 2026, an estimated $1.35M.
  • Iron Mountain made up 0.02% of XTX Topco's portfolio in Q2 2026, its #1197 holding.
  • XTX Topco first reported a position in Iron Mountain in Q2 2021 and has held it in 11 quarters since.
  • XTX Topco's Iron Mountain position peaked at $2.6M in Q1 2026.
  • 1,172 funds tracked by Wall St. Rank held Iron Mountain as of Q2 2026.

Based on XTX Topco's 13F filing for Q2 2026, filed 14 Aug 2026.