Two Sigma Investments
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Two Sigma Investments’s Iron Mountain IRM Stock Holding History

Two Sigma Investments’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 		$409K Buy
+4,000
New +$398K ﹤0.01% 3867
2022
Q1 		– Sell
-16,500
Closed -$863K – 3455
2021
Q4 		$863K Buy
16,500
+11,700
+244% +$553K ﹤0.01% 2695
2021
Q3 		$209K Buy
+4,800
New +$216K ﹤0.01% 3938
2021
Q1 		– Sell
-13,300
Closed -$392K – 4025
2020
Q4 		$392K Buy
13,300
+300
+2% +$8.32K ﹤0.01% 2660
2020
Q3 		$348K Sell
13,000
-1,200
-8% -$34.1K ﹤0.01% 2490
2020
Q2 		$371K Sell
14,200
-4,500
-24% -$114K ﹤0.01% 2226
2020
Q1 		$445K Sell
18,700
-40,500
-68% -$1.23M ﹤0.01% 2023
2019
Q4 		$1.89M Buy
59,200
+49,900
+537% +$1.64M 0.01% 1634
2019
Q3 		$301K Sell
9,300
-20,600
-69% -$647K ﹤0.01% 2960
2019
Q2 		$936K Buy
29,900
+22,900
+327% +$750K ﹤0.01% 1981
2019
Q1 		$248K Sell
7,000
-7,100
-50% -$251K ﹤0.01% 2721
2018
Q4 		$457K Buy
+14,100
New +$462K ﹤0.01% 2162
2018
Q3 		– Sell
-14,200
Closed -$497K – 3391
2018
Q2 		$497K Sell
14,200
-7,500
-35% -$253K ﹤0.01% 2651
2018
Q1 		$713K Buy
+21,700
New +$731K ﹤0.01% 2233
2017
Q3 		– Sell
-11,000
Closed -$378K – 2963
2017
Q2 		$378K Buy
+11,000
New +$385K ﹤0.01% 2521
2017
Q1 		– Sell
-15,700
Closed -$510K – 3089
2016
Q4 		$510K Sell
15,700
-39,800
-72% -$1.32M ﹤0.01% 2505
2016
Q3 		$2.08M Buy
+55,500
New +$2.14M 0.01% 1419
2016
Q1 		– Sell
-8,000
Closed -$216K – 2946
2015
Q4 		$216K Buy
+8,000
New +$235K ﹤0.01% 2424

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

Two Sigma Investments's IRM Position: Q1 2026 in Review

Two Sigma Investments reduced its Iron Mountain (IRM) stake by 38% in Q1 2026, selling an estimated $11M and leaving 179,202 shares worth $18.3M. The position accounts for 0.01% of the portfolio, ranked #1001.

Two Sigma Investments first reported a position in IRM in Q2 2013 and has held it in 22 quarters since. The position peaked at $45.3M in Q2 2016. 1,082 funds tracked by Wall St. Rank hold IRM as of Q1 2026.

  • Two Sigma Investments held 179,202 shares of Iron Mountain worth $18.3M as of Q1 2026.
  • Two Sigma Investments sold 110,958 Iron Mountain shares in Q1 2026, an estimated $11M.
  • Iron Mountain made up 0.01% of Two Sigma Investments's portfolio in Q1 2026, its #1001 holding.
  • Two Sigma Investments first reported a position in Iron Mountain in Q2 2013 and has held it in 22 quarters since.
  • Two Sigma Investments's Iron Mountain position peaked at $45.3M in Q2 2016.
  • 1,082 funds tracked by Wall St. Rank held Iron Mountain as of Q1 2026.

Based on Two Sigma Investments's 13F filing for Q1 2026, filed 15 May 2026.