TwinBeech Capital’s Iron Mountain IRM Stock Holding History

TwinBeech Capital’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	$1.78M	Sell	17,400 -28,500	-62%	-$2.84M	0.18%	164
2025 Q4	$3.81M	Buy	+45,900	New	+$4.3M	0.27%	113
2025 Q1	–	Sell	-9,094	Closed	-$956K	–	828
2024 Q4	$956K	Buy	+9,094	New	+$1.07M	0.02%	385
2024 Q2	–	Sell	-4,210	Closed	-$338K	–	663
2024 Q1	$338K	Buy	+4,210	New	+$305K	0.01%	480
2023 Q3	–	Sell	-69,610	Closed	-$3.96M	–	762
2023 Q2	$3.96M	Buy	+69,610	New	+$3.81M	0.08%	282
2022 Q3	–	Sell	-5,259	Closed	-$256K	–	718
2022 Q2	$256K	Buy	+5,259	New	+$277K	0.01%	464

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

TwinBeech Capital's IRM Position: Q1 2026 in Review

TwinBeech Capital reduced its Iron Mountain (IRM) stake by 62% in Q1 2026, selling an estimated $2.84M and leaving 17,400 shares worth $1.78M. The position accounts for 0.18% of the portfolio, ranked #164.

TwinBeech Capital first reported a position in IRM in Q2 2022 and has held it in 6 quarters since. The position peaked at $3.96M in Q2 2023. 1,082 funds tracked by Wall St. Rank hold IRM as of Q1 2026.

TwinBeech Capital held 17,400 shares of Iron Mountain worth $1.78M as of Q1 2026.
TwinBeech Capital sold 28,500 Iron Mountain shares in Q1 2026, an estimated $2.84M.
Iron Mountain made up 0.18% of TwinBeech Capital's portfolio in Q1 2026, its #164 holding.
TwinBeech Capital first reported a position in Iron Mountain in Q2 2022 and has held it in 6 quarters since.
TwinBeech Capital's Iron Mountain position peaked at $3.96M in Q2 2023.
1,082 funds tracked by Wall St. Rank held Iron Mountain as of Q1 2026.

Based on TwinBeech Capital's 13F filing for Q1 2026, filed 15 May 2026.