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 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 New York $5.72T AUM 30.48% 1-Year Est. Return

VPM

Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

Cohen & Steers New York $57.6B AUM 8.03% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return

Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return

Principal Financial Group Des Moines, Iowa $187B AUM 18.48% 1-Year Est. Return

Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return

XTX Topco's IRM Position: Q1 2026 in Review

XTX Topco opened a new position in Iron Mountain (IRM) in Q1 2026: 25,465 shares worth $2.6M. The stake represents 0.05% of the portfolio and ranks #653 among its holdings. This is a return to the name: XTX Topco previously reported a position in IRM as recently as Q2 2025.

XTX Topco first reported a position in IRM in Q2 2021 and has held it in 10 quarters since. 1,082 funds tracked by Wall St. Rank hold IRM as of Q1 2026.

XTX Topco held 25,465 shares of Iron Mountain worth $2.6M as of Q1 2026.
Iron Mountain was a new XTX Topco position in Q1 2026.
Iron Mountain made up 0.05% of XTX Topco's portfolio in Q1 2026, its #653 holding.
XTX Topco first reported a position in Iron Mountain in Q2 2021 and has held it in 10 quarters since.
1,082 funds tracked by Wall St. Rank held Iron Mountain as of Q1 2026.

Based on XTX Topco's 13F filing for Q1 2026, filed 15 May 2026.