Mangrove Partners’s Iron Mountain IRM Stock Holding History

Mangrove Partners’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
2014 Q3	–	Sell	-756,859	Closed	-$24.8M	–	41
2014 Q2	$24.8M	Buy	756,859 +196,167	+35%	+$5.32M	8.22%	2
2014 Q1	$14.3M	Buy	+560,692	New	+$14.3M	4.76%	4

Other funds holding IRM

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

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

State Street Boston, Massachusetts $3.37T AUM 44.26% 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

Invesco Atlanta, Georgia $1.26T AUM 61.52% 1-Year Est. Return

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

Northern Trust Chicago, Illinois $860B AUM 41.15% 1-Year Est. Return

Charles Schwab San Francisco, California $751B AUM 38.74% 1-Year Est. Return

Mangrove Partners's IRM Position: Q3 2025 in Review

Mangrove Partners sold out of Iron Mountain (IRM) in Q3 2025, closing a stake of 7,088 shares — an estimated $727K sold.

Mangrove Partners first reported a position in IRM in Q4 2013 and held it in 3 quarters. The position peaked at $9.94M in Q4 2013. 1,016 funds tracked by Wall St. Rank hold IRM as of Q3 2025.

Mangrove Partners reported no remaining Iron Mountain position as of Q3 2025 after selling out during the quarter.
Mangrove Partners sold 7,088 Iron Mountain shares in Q3 2025, an estimated $727K.
Mangrove Partners first reported a position in Iron Mountain in Q4 2013 and held it in 3 quarters.
Mangrove Partners's Iron Mountain position peaked at $9.94M in Q4 2013.
1,016 funds tracked by Wall St. Rank held Iron Mountain as of Q3 2025.

Based on Mangrove Partners's 13F filing for Q3 2025, filed 14 Nov 2025.