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Contour Asset Management’s Iron Mountain IRM Stock Holding History

Contour Asset 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
Q1 		$148M Sell
1,444,823
-1,387,359
-49% -$138M 4.8% 7
2025
Q4 		$235M Sell
2,832,182
-333,648
-11% -$31.2M 5.48% 6
2025
Q3 		$323M Buy
3,165,830
+830,482
+36% +$80M 8.09% 1
2025
Q2 		$240M Buy
2,335,348
+908,098
+64% +$85.6M 7.83% 3
2025
Q1 		$123M Buy
+1,427,250
New +$138M 5.12% 9

Other funds holding IRM

BlackRock
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
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
Cohen & Steers
Cohen & Steers New York $57.6B AUM 8.03% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return
Principal Financial Group
Principal Financial Group Des Moines, Iowa $187B AUM 18.48% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return

Contour Asset Management's IRM Position: Q1 2026 in Review

Contour Asset Management reduced its Iron Mountain (IRM) stake by 49% in Q1 2026, selling an estimated $138M and leaving 1,444,823 shares worth $148M. The position accounts for 4.8% of the portfolio, ranked #7.

Contour Asset Management first reported a position in IRM in Q1 2025 and has held it in 5 quarters since. The position peaked at $323M in Q3 2025. 1,082 funds tracked by Wall St. Rank hold IRM as of Q1 2026.

  • Contour Asset Management held 1,444,823 shares of Iron Mountain worth $148M as of Q1 2026.
  • Contour Asset Management sold 1,387,359 Iron Mountain shares in Q1 2026, an estimated $138M.
  • Iron Mountain made up 4.8% of Contour Asset Management's portfolio in Q1 2026, its #7 holding.
  • Contour Asset Management first reported a position in Iron Mountain in Q1 2025 and has held it in 5 quarters since.
  • Contour Asset Management's Iron Mountain position peaked at $323M in Q3 2025.
  • 1,082 funds tracked by Wall St. Rank held Iron Mountain as of Q1 2026.

Based on Contour Asset Management's 13F filing for Q1 2026, filed 15 May 2026.