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Gillson Capital’s Iron Mountain IRM Stock Holding History

Gillson 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
2025
Q4 		– Sell
-286,900
Closed -$29.2M – 90
2025
Q3 		$29.2M Sell
286,900
-82,237
-22% -$7.92M 2.54% 12
2025
Q2 		$37.9M Buy
+369,137
New +$34.8M 2.89% 7
2024
Q4 		– Sell
-143,400
Closed -$17M – 72
2024
Q3 		$17M Buy
143,400
+106,200
+285% +$11.4M 1.55% 26
2024
Q2 		$3.33M Sell
37,200
-81,299
-69% -$6.58M 0.32% 54
2024
Q1 		$9.51M Buy
+118,499
New +$8.58M 0.9% 40

Other funds holding IRM

Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Cohen & Steers
Cohen & Steers New York $57.6B AUM 8.03% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 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
Norges Bank
Norges Bank Oslo, Norway $935B AUM
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.02T AUM 30.18% 1-Year Est. Return
Principal Financial Group
Principal Financial Group Des Moines, Iowa $187B AUM 18.48% 1-Year Est. Return

Gillson Capital's IRM Position: Q4 2025 in Review

Gillson Capital sold out of Iron Mountain (IRM) in Q4 2025, closing a stake of 286,900 shares — an estimated $29.2M sold.

Gillson Capital first reported a position in IRM in Q1 2024 and held it in 5 quarters. The position peaked at $37.9M in Q2 2025. 1,006 funds tracked by Wall St. Rank hold IRM as of Q4 2025.

  • Gillson Capital reported no remaining Iron Mountain position as of Q4 2025 after selling out during the quarter.
  • Gillson Capital sold 286,900 Iron Mountain shares in Q4 2025, an estimated $29.2M.
  • Gillson Capital first reported a position in Iron Mountain in Q1 2024 and held it in 5 quarters.
  • Gillson Capital's Iron Mountain position peaked at $37.9M in Q2 2025.
  • 1,006 funds tracked by Wall St. Rank held Iron Mountain as of Q4 2025.

Based on Gillson Capital's 13F filing for Q4 2025, filed 17 Feb 2026.