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	–	Sell	-55,900	Closed	-$4.64M	–	2999
2025 Q4	$4.64M	Buy	+55,900	New	+$5.23M	0.01%	973
2025 Q3	–	Sell	-3,500	Closed	-$359K	–	3198
2025 Q2	$359K	Buy	3,500 +2,800	+400%	+$264K	﹤0.01%	2251
2025 Q1	$60.2K	Buy	+700	New	+$67.5K	﹤0.01%	2670

Other funds holding IRM

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

State Street Boston, Massachusetts $3.38T AUM 44.17% 1-Year Est. Return

Cohen & Steers New York $63.2B AUM 17.15% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return

Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return

Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return

Principal Financial Group Des Moines, Iowa $204B AUM 27.99% 1-Year Est. Return

PEAK6's IRM Position: Q2 2026 in Review

PEAK6 sold out of Iron Mountain (IRM) in Q2 2026, closing a stake of 60,388 shares — an estimated $7.4M sold.

PEAK6 first reported a position in IRM in Q4 2025 and held it in 2 quarters. The position peaked at $6.17M in Q1 2026. 1,174 funds tracked by Wall St. Rank hold IRM as of Q2 2026.

PEAK6 reported no remaining Iron Mountain position as of Q2 2026 after selling out during the quarter.
PEAK6 sold 60,388 Iron Mountain shares in Q2 2026, an estimated $7.4M.
PEAK6 first reported a position in Iron Mountain in Q4 2025 and held it in 2 quarters.
PEAK6's Iron Mountain position peaked at $6.17M in Q1 2026.
1,174 funds tracked by Wall St. Rank held Iron Mountain as of Q2 2026.

Based on PEAK6's 13F filing for Q2 2026, filed 13 Aug 2026.