Laurion Capital Management’s Iron Mountain IRM Stock Holding History

Laurion Capital Management’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
2025 Q3	–	Sell	-5,938	Closed	-$609K	–	342
2025 Q2	$609K	Buy	+5,938	New	+$560K	0.01%	228
2025 Q1	–	Sell	-30,626	Closed	-$3.22M	–	330
2024 Q4	$3.22M	Sell	30,626 -6,054	-17%	-$711K	0.06%	165
2024 Q3	$4.36M	Buy	+36,680	New	+$3.92M	0.06%	117
2023 Q3	–	Sell	-5,800	Closed	-$330K	–	575
2023 Q2	$330K	Buy	+5,800	New	+$318K	﹤0.01%	446
2022 Q2	–	Sell	-4,100	Closed	-$227K	–	592
2022 Q1	$227K	Buy	+4,100	New	+$195K	﹤0.01%	462
2017 Q2	–	Sell	-53,400	Closed	-$1.91M	–	1732
2017 Q1	$1.91M	Buy	+53,400	New	+$1.89M	0.01%	616
2015 Q3	–	Sell	-12,700	Closed	-$394K	–	816
2015 Q2	$394K	Buy	+12,700	New	+$445K	﹤0.01%	496

Other funds holding IRM

Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return

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

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

Invesco Atlanta, Georgia $1.02T AUM 30.18% 1-Year Est. Return

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

Northern Trust Chicago, Illinois $757B AUM 28.64% 1-Year Est. Return

Charles Schwab San Francisco, California $654B AUM 26.35% 1-Year Est. Return

Laurion Capital Management's IRM Position: Q3 2025 in Review

Laurion Capital Management sold out of Iron Mountain (IRM) in Q3 2025, closing a stake of 5,938 shares — an estimated $609K sold.

Laurion Capital Management first reported a position in IRM in Q2 2015 and held it in 7 quarters. The position peaked at $4.36M in Q3 2024. 1,015 funds tracked by Wall St. Rank hold IRM as of Q3 2025.

Laurion Capital Management reported no remaining Iron Mountain position as of Q3 2025 after selling out during the quarter.
Laurion Capital Management sold 5,938 Iron Mountain shares in Q3 2025, an estimated $609K.
Laurion Capital Management first reported a position in Iron Mountain in Q2 2015 and held it in 7 quarters.
Laurion Capital Management's Iron Mountain position peaked at $4.36M in Q3 2024.
1,015 funds tracked by Wall St. Rank held Iron Mountain as of Q3 2025.

Based on Laurion Capital Management's 13F filing for Q3 2025, filed 17 Nov 2025.