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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
2025
Q3 		– Sell
-7,088
Closed -$727K – 217
2025
Q2 		$727K Buy
+7,088
New +$668K 0.08% 102
2014
Q2 		– Sell
-12,551
Closed -$340K – 40
2014
Q1 		$320K Sell
12,551
-341,696
-96% -$8.74M 0.11% 40
2013
Q4 		$9.94M Buy
+354,247
New +$9.07M 4.16% 8

Other funds holding IRM

Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Cohen & Steers
Cohen & Steers New York $63.2B AUM 17.15% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.26T AUM 61.52% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return
Northern Trust
Northern Trust Chicago, Illinois $860B AUM 41.15% 1-Year Est. Return
Charles Schwab
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.