Hudson Bay Capital Management
IRM icon

Hudson Bay Capital Management’s Iron Mountain IRM Stock Holding History

Hudson Bay 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
2026
Q2 		– Sell
-190,884
Closed -$19.5M – 1518
2026
Q1 		$19.5M Buy
+190,884
New +$19M 0.07% 192
2025
Q4 		– Sell
-80,657
Closed -$8.22M – 1356
2025
Q3 		$8.22M Buy
80,657
+74,549
+1,221% +$7.18M 0.03% 404
2025
Q2 		$626K Buy
+6,108
New +$576K ﹤0.01% 1043
2019
Q2 		– Sell
-11,700
Closed -$415K – 581
2019
Q1 		$415K Buy
+11,700
New +$413K 0.01% 619
2013
Q3 		– Sell
-97,380
Closed -$2.4M – 181
2013
Q2 		$2.4M Buy
+97,380
New +$3.14M 0.13% 91

Other funds holding IRM

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
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
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return
Principal Financial Group
Principal Financial Group Des Moines, Iowa $204B AUM 27.99% 1-Year Est. Return

Hudson Bay Capital Management's IRM Position: Q2 2026 in Review

Hudson Bay Capital Management sold out of Iron Mountain (IRM) in Q2 2026, closing a stake of 190,884 shares — an estimated $19.5M sold.

Hudson Bay Capital Management first reported a position in IRM in Q2 2013 and held it in 5 quarters. The position peaked at $19.5M in Q1 2026. 1,165 funds tracked by Wall St. Rank hold IRM as of Q2 2026.

  • Hudson Bay Capital Management reported no remaining Iron Mountain position as of Q2 2026 after selling out during the quarter.
  • Hudson Bay Capital Management sold 190,884 Iron Mountain shares in Q2 2026, an estimated $19.5M.
  • Hudson Bay Capital Management first reported a position in Iron Mountain in Q2 2013 and held it in 5 quarters.
  • Hudson Bay Capital Management's Iron Mountain position peaked at $19.5M in Q1 2026.
  • 1,165 funds tracked by Wall St. Rank held Iron Mountain as of Q2 2026.

Based on Hudson Bay Capital Management's 13F filing for Q2 2026, filed 14 Aug 2026.