PEAK6’s Iron Mountain IRM Stock Holding History

PEAK6’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	$613K	Sell	6,000 -1,800	-23%	-$179K	﹤0.01%	1891
2025 Q4	$647K	Hold	7,800	–	–	﹤0.01%	1983
2025 Q3	$795K	Sell	7,800 -4,200	-35%	-$405K	﹤0.01%	1944
2025 Q2	$1.23M	Sell	12,000 -138,200	-92%	-$13M	﹤0.01%	1701
2025 Q1	$12.9M	Sell	150,200 -59,200	-28%	-$5.7M	0.03%	486
2024 Q4	$22M	Buy	+209,400	New	+$24.6M	0.05%	313

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

PEAK6's IRM Position: Q1 2026 in Review

PEAK6 increased its Iron Mountain (IRM) stake by 1,036% in Q1 2026, buying an estimated $5.48M and bringing the position to 60,388 shares worth $6.17M. The position accounts for 0.01% of the portfolio, ranked #793.

PEAK6 first reported a position in IRM in Q4 2025 and has held it in 2 quarters since. 1,082 funds tracked by Wall St. Rank hold IRM as of Q1 2026.

PEAK6 held 60,388 shares of Iron Mountain worth $6.17M as of Q1 2026.
PEAK6 bought 55,071 Iron Mountain shares in Q1 2026, an estimated $5.48M.
Iron Mountain made up 0.01% of PEAK6's portfolio in Q1 2026, its #793 holding.
PEAK6 first reported a position in Iron Mountain in Q4 2025 and has held it in 2 quarters since.
1,082 funds tracked by Wall St. Rank held Iron Mountain as of Q1 2026.

Based on PEAK6's 13F filing for Q1 2026, filed 14 May 2026.