Renaissance Technologies
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Renaissance Technologies’s Iron Mountain IRM Stock Holding History

Renaissance Technologies’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 		$973K Buy
7,700
+5,300
+221% +$650K ﹤0.01% 2324
2026
Q1 		$245K Buy
+2,400
New +$239K ﹤0.01% 2867
2025
Q2 		– Sell
-85,763
Closed -$7.38M – 3715
2025
Q1 		$7.38M Buy
+85,763
New +$8.26M 0.01% 1185
2023
Q1 		– Sell
-80,600
Closed -$4.02M – 4183
2022
Q4 		$4.02M Sell
80,600
-53,900
-40% -$2.72M 0.01% 1648
2022
Q3 		$5.91M Sell
134,500
-143,200
-52% -$7.23M 0.01% 1325
2022
Q2 		$13.5M Buy
277,700
+161,400
+139% +$8.49M 0.02% 945
2022
Q1 		$6.44M Sell
116,300
-241,263
-67% -$11.5M 0.01% 1411
2021
Q4 		$18.7M Buy
357,563
+184,200
+106% +$8.71M 0.02% 751
2021
Q3 		$7.53M Sell
173,363
-199,200
-53% -$8.97M 0.01% 1204
2021
Q2 		$15.8M Buy
372,563
+258,100
+225% +$10.8M 0.02% 888
2021
Q1 		$4.24M Buy
+114,463
New +$3.83M 0.01% 1750
2020
Q2 		– Sell
-88,300
Closed -$2.1M – 3593
2020
Q1 		$2.1M Buy
+88,300
New +$2.67M ﹤0.01% 2026
2019
Q2 		– Sell
-89,800
Closed -$3.18M – 3645
2019
Q1 		$3.18M Sell
89,800
-36,900
-29% -$1.3M ﹤0.01% 2080
2018
Q4 		$4.11M Sell
126,700
-55,800
-31% -$1.83M ﹤0.01% 1841
2018
Q3 		$6.3M Buy
182,500
+175,486
+2,502% +$6.25M 0.01% 1652
2018
Q2 		$245K Buy
+7,014
New +$237K ﹤0.01% 3026
2018
Q1 		– Sell
-54,062
Closed -$2.04M – 3460
2017
Q4 		$2.04M Buy
+54,062
New +$2.15M ﹤0.01% 2332
2016
Q1 		– Sell
-337,763
Closed -$9.12M – 3439
2015
Q4 		$9.12M Buy
+337,763
New +$9.91M 0.02% 1056
2014
Q2 		– Sell
-813,494
Closed -$20.7M – 2867
2014
Q1 		$20.7M Buy
813,494
+76,207
+10% +$1.95M 0.05% 466
2013
Q4 		$20.7M Sell
737,287
-1,411,252
-66% -$36.2M 0.05% 447
2013
Q3 		$53.7M Sell
2,148,539
-77,255
-3% -$1.96M 0.13% 161
2013
Q2 		$54.7M Buy
+2,225,794
New +$71.8M 0.14% 151

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

Renaissance Technologies's IRM Position: Q2 2026 in Review

Renaissance Technologies increased its Iron Mountain (IRM) stake by 221% in Q2 2026, buying an estimated $650K and bringing the position to 7,700 shares worth $973K. The position accounts for ﹤0.01% of the portfolio, ranked #2324.

Renaissance Technologies first reported a position in IRM in Q2 2013 and has held it in 22 quarters since. The position peaked at $54.7M in Q2 2013. 1,169 funds tracked by Wall St. Rank hold IRM as of Q2 2026.

  • Renaissance Technologies held 7,700 shares of Iron Mountain worth $973K as of Q2 2026.
  • Renaissance Technologies bought 5,300 Iron Mountain shares in Q2 2026, an estimated $650K.
  • Iron Mountain made up ﹤0.01% of Renaissance Technologies's portfolio in Q2 2026, its #2324 holding.
  • Renaissance Technologies first reported a position in Iron Mountain in Q2 2013 and has held it in 22 quarters since.
  • Renaissance Technologies's Iron Mountain position peaked at $54.7M in Q2 2013.
  • 1,169 funds tracked by Wall St. Rank held Iron Mountain as of Q2 2026.

Based on Renaissance Technologies's 13F filing for Q2 2026, filed 13 Aug 2026.