TRCT
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Tower Research Capital (TRC)’s Iron Mountain IRM Stock Holding History

Tower Research Capital (TRC)’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 		$1.96M Buy
19,177
+14,656
+324% +$1.46M 0.05% 349
2025
Q4 		$375K Sell
4,521
-3,171
-41% -$297K 0.01% 1003
2025
Q3 		$784K Sell
7,692
-12,190
-61% -$1.17M 0.02% 616
2025
Q2 		$2.04M Buy
19,882
+9,184
+86% +$866K 0.06% 306
2025
Q1 		$920K Sell
10,698
-2,930
-21% -$282K 0.03% 536
2024
Q4 		$1.43M Sell
13,628
-1,932
-12% -$227K 0.03% 469
2024
Q3 		$1.85M Sell
15,560
-4,992
-24% -$534K 0.05% 305
2024
Q2 		$1.84M Buy
20,552
+10,051
+96% +$813K 0.03% 464
2024
Q1 		$842K Sell
10,501
-36,378
-78% -$2.63M 0.02% 593
2023
Q4 		$3.28M Buy
46,879
+23,678
+102% +$1.49M 0.04% 363
2023
Q3 		$1.38M Sell
23,201
-5,033
-18% -$308K 0.04% 418
2023
Q2 		$1.6M Buy
28,234
+18,594
+193% +$1.02M 0.05% 294
2023
Q1 		$510K Sell
9,640
-1,201
-11% -$62.9K 0.02% 820
2022
Q4 		$540K Sell
10,841
-3,367
-24% -$170K 0.02% 662
2022
Q3 		$624K Sell
14,208
-20,303
-59% -$1.03M 0.01% 974
2022
Q2 		$1.68M Sell
34,511
-42,264
-55% -$2.22M 0.04% 434
2022
Q1 		$4.25M Buy
76,775
+21,473
+39% +$1.02M 0.04% 353
2021
Q4 		$2.89M Buy
55,302
+37,875
+217% +$1.79M 0.05% 312
2021
Q3 		$757K Sell
17,427
-11,958
-41% -$538K 0.02% 702
2021
Q2 		$1.24M Sell
29,385
-10,763
-27% -$451K 0.03% 513
2021
Q1 		$1.49M Buy
40,148
+16,478
+70% +$551K 0.03% 584
2020
Q4 		$697K Sell
23,670
-14,905
-39% -$414K 0.02% 747
2020
Q3 		$1.03M Buy
38,575
+32,712
+558% +$931K 0.01% 964
2020
Q2 		$153K Buy
5,863
+3,695
+170% +$93.3K 0.01% 2049
2020
Q1 		$51K Buy
2,168
+36
+2% +$1.09K ﹤0.01% 1288
2019
Q4 		$68K Sell
2,132
-9,080
-81% -$298K 0.01% 1149
2019
Q3 		$363K Buy
11,212
+10,630
+1,826% +$334K 0.02% 710
2019
Q2 		$18K Sell
582
-12,129
-95% -$397K ﹤0.01% 2249
2019
Q1 		$451K Buy
12,711
+1,363
+12% +$48.1K 0.03% 662
2018
Q4 		$368K Buy
11,348
+5,497
+94% +$180K 0.03% 513
2018
Q3 		$202K Sell
5,851
-14,369
-71% -$512K 0.01% 961
2018
Q2 		$708K Buy
+20,220
New +$683K 0.04% 483
2018
Q1 		– Sell
-50
Closed -$2K – 3541
2017
Q4 		$2K Sell
50
-253
-83% -$10K ﹤0.01% 3212
2017
Q3 		$12K Sell
303
-597
-66% -$22.3K ﹤0.01% 2990
2017
Q2 		$31K Buy
+900
New +$31.5K ﹤0.01% 988
2017
Q1 		– Sell
-2,269
Closed -$74K – 3470
2016
Q4 		$74K Buy
2,269
+283
+14% +$9.41K 0.01% 1140
2016
Q3 		$75K Sell
1,986
-643
-24% -$24.8K 0.01% 946
2016
Q2 		$105K Buy
2,629
+2,041
+347% +$74.3K 0.01% 1072
2016
Q1 		$20K Buy
588
+302
+106% +$8.67K ﹤0.01% 1347
2015
Q4 		$7K Buy
+286
New +$8.39K ﹤0.01% 2581
2015
Q1 		– Sell
-1,925
Closed -$75K – 4656
2014
Q4 		$75K Sell
1,925
-51,233
-96% -$1.86M 0.01% 839
2014
Q3 		$1.74M Buy
53,158
+52,550
+8,643% +$1.7M 0.19% 100
2014
Q2 		$20K Buy
+608
New +$16.5K ﹤0.01% 1844
2014
Q1 		– Sell
-6,924
Closed -$195K – 4666
2013
Q4 		$195K Sell
6,924
-7,053
-50% -$181K 0.03% 531
2013
Q3 		$349K Buy
13,977
+13,592
+3,530% +$345K 0.04% 441
2013
Q2 		$9K Buy
+385
New +$12.4K ﹤0.01% 2450

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

Tower Research Capital (TRC)'s IRM Position: Q1 2026 in Review

Tower Research Capital (TRC) increased its Iron Mountain (IRM) stake by 324% in Q1 2026, buying an estimated $1.46M and bringing the position to 19,177 shares worth $1.96M. The position accounts for 0.05% of the portfolio, ranked #349.

Tower Research Capital (TRC) first reported a position in IRM in Q2 2013 and has held it in 46 quarters since. The position peaked at $4.25M in Q1 2022. 1,082 funds tracked by Wall St. Rank hold IRM as of Q1 2026.

  • Tower Research Capital (TRC) held 19,177 shares of Iron Mountain worth $1.96M as of Q1 2026.
  • Tower Research Capital (TRC) bought 14,656 Iron Mountain shares in Q1 2026, an estimated $1.46M.
  • Iron Mountain made up 0.05% of Tower Research Capital (TRC)'s portfolio in Q1 2026, its #349 holding.
  • Tower Research Capital (TRC) first reported a position in Iron Mountain in Q2 2013 and has held it in 46 quarters since.
  • Tower Research Capital (TRC)'s Iron Mountain position peaked at $4.25M in Q1 2022.
  • 1,082 funds tracked by Wall St. Rank held Iron Mountain as of Q1 2026.

Based on Tower Research Capital (TRC)'s 13F filing for Q1 2026, filed 15 May 2026.