TSS
IRM icon

Two Sigma Securities’s Iron Mountain IRM Stock Holding History

Two Sigma Securities’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
2024
Q4 		– Sell
-14,600
Closed -$1.73M – 2402
2024
Q3 		$1.73M Buy
14,600
+7,200
+97% +$770K 0.03% 605
2024
Q2 		$663K Buy
7,400
+2,900
+64% +$235K 0.01% 1337
2024
Q1 		$361K Sell
4,500
-800
-15% -$57.9K ﹤0.01% 1810
2023
Q4 		$371K Buy
+5,300
New +$332K ﹤0.01% 1801
2023
Q3 		– Sell
-14,500
Closed -$824K – 3197
2023
Q2 		$824K Buy
+14,500
New +$794K 0.01% 1098
2023
Q1 		– Sell
-4,400
Closed -$219K – 2954
2022
Q4 		$219K Buy
+4,400
New +$222K 0.01% 1860
2022
Q2 		– Sell
-6,000
Closed -$332K – 2534
2022
Q1 		$332K Buy
+6,000
New +$286K 0.01% 1316
2020
Q1 		– Sell
-10,500
Closed -$335K – 1827
2019
Q4 		$335K Sell
10,500
-2,100
-17% -$68.9K ﹤0.01% 1715
2019
Q3 		$408K Sell
12,600
-17,100
-58% -$537K ﹤0.01% 1335
2019
Q2 		$930K Buy
29,700
+19,900
+203% +$652K 0.01% 770
2019
Q1 		$348K Buy
+9,800
New +$346K ﹤0.01% 1082
2018
Q4 		– Sell
-7,800
Closed -$269K – 2477
2018
Q3 		$269K Buy
7,800
+1,800
+30% +$64.1K ﹤0.01% 1844
2018
Q2 		$210K Sell
6,000
-1,100
-15% -$37.2K ﹤0.01% 2327
2018
Q1 		$233K Buy
+7,100
New +$239K ﹤0.01% 2182

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

Two Sigma Securities's IRM Position: Q4 2025 in Review

Two Sigma Securities sold out of Iron Mountain (IRM) in Q4 2025, closing a stake of 7,256 shares — an estimated $740K sold.

Two Sigma Securities first reported a position in IRM in Q2 2017 and held it in 11 quarters. The position peaked at $902K in Q2 2025. 1,006 funds tracked by Wall St. Rank hold IRM as of Q4 2025.

  • Two Sigma Securities reported no remaining Iron Mountain position as of Q4 2025 after selling out during the quarter.
  • Two Sigma Securities sold 7,256 Iron Mountain shares in Q4 2025, an estimated $740K.
  • Two Sigma Securities first reported a position in Iron Mountain in Q2 2017 and held it in 11 quarters.
  • Two Sigma Securities's Iron Mountain position peaked at $902K in Q2 2025.
  • 1,006 funds tracked by Wall St. Rank held Iron Mountain as of Q4 2025.

Based on Two Sigma Securities's 13F filing for Q4 2025, filed 17 Feb 2026.