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Sumitomo Mitsui DS Asset Management’s Iron Mountain IRM Stock Holding History

Sumitomo Mitsui DS Asset Management’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 		$14.3M Buy
112,827
+3,105
+3% +$381K 0.1% 166
2026
Q1 		$11.2M Buy
109,722
+7,106
+7% +$707K 0.09% 181
2025
Q4 		$8.51M Buy
102,616
+2,238
+2% +$209K 0.07% 222
2025
Q3 		$10.2M Buy
100,378
+3,364
+3% +$324K 0.08% 194
2025
Q2 		$9.95M Buy
97,014
+2,049
+2% +$193K 0.09% 185
2025
Q1 		$8.17M Buy
94,965
+2,395
+3% +$231K 0.08% 198
2024
Q4 		$9.73M Buy
92,570
+7,916
+9% +$930K 0.1% 169
2024
Q3 		$10.1M Buy
84,654
+3,980
+5% +$426K 0.11% 164
2024
Q2 		$7.23M Buy
80,674
+3,079
+4% +$249K 0.09% 191
2024
Q1 		$6.22M Buy
77,595
+744
+1% +$53.9K 0.08% 210
2023
Q4 		$5.38M Buy
76,851
+3,456
+5% +$217K 0.07% 250
2023
Q3 		$4.36M Buy
73,395
+3,978
+6% +$243K 0.07% 242
2023
Q2 		$3.94M Buy
69,417
+2,085
+3% +$114K 0.06% 256
2023
Q1 		$3.56M Buy
67,332
+3,856
+6% +$202K 0.06% 244
2022
Q4 		$3.16M Buy
63,476
+1,953
+3% +$98.6K 0.06% 254
2022
Q3 		$2.71M Buy
61,523
+7,276
+13% +$367K 0.06% 262
2022
Q2 		$2.64M Buy
54,247
+3,995
+8% +$210K 0.06% 261
2022
Q1 		$2.78M Buy
50,252
+4,245
+9% +$202K 0.06% 273
2021
Q4 		$2.41M Buy
46,007
+2,621
+6% +$124K 0.05% 325
2021
Q3 		$1.89M Buy
43,386
+1,426
+3% +$64.2K 0.04% 346
2021
Q2 		$1.77M Buy
41,960
+3,125
+8% +$131K 0.04% 356
2021
Q1 		$1.44M Buy
38,835
+2,521
+7% +$84.3K 0.04% 389
2020
Q4 		$1.07M Sell
36,314
-921
-2% -$25.6K 0.03% 436
2020
Q3 		$997K Buy
37,235
+2,153
+6% +$61.3K 0.03% 409
2020
Q2 		$915K Buy
35,082
+2,958
+9% +$74.7K 0.03% 414
2020
Q1 		$764K Sell
32,124
-863
-3% -$26.1K 0.03% 398
2019
Q4 		$1.05M Buy
32,987
+1,905
+6% +$62.5K 0.04% 405
2019
Q3 		$1.01M Buy
31,082
+4,230
+16% +$133K 0.04% 392
2019
Q2 		$840K Sell
26,852
-59,181
-69% -$1.94M 0.03% 413
2019
Q1 		$3.05M Sell
86,033
-5,094
-6% -$180K 0.05% 272
2018
Q4 		$2.95M Sell
91,127
-9,306
-9% -$305K 0.05% 245
2018
Q3 		$3.47M Sell
100,433
-9,312
-8% -$332K 0.05% 252
2018
Q2 		$3.84M Sell
109,745
-532
-0.5% -$18K 0.06% 238
2018
Q1 		$3.62M Buy
110,277
+5,898
+6% +$199K 0.05% 260
2017
Q4 		$3.94M Buy
104,379
+75,513
+262% +$3M 0.06% 245
2017
Q3 		$1.12M Buy
28,866
+1,431
+5% +$53.5K 0.02% 448
2017
Q2 		$942K Sell
27,435
-6,454
-19% -$226K 0.02% 500
2017
Q1 		$1.21M Buy
33,889
+2,224
+7% +$78.7K 0.02% 434
2016
Q4 		$1.03M Buy
31,665
+1,883
+6% +$62.6K 0.02% 435
2016
Q3 		$1.12M Buy
29,782
+1,578
+6% +$60.9K 0.02% 408
2016
Q2 		$1.12M Buy
28,204
+7,612
+37% +$277K 0.03% 376
2016
Q1 		$698K Sell
20,592
-1,936
-9% -$55.6K 0.02% 517
2015
Q4 		$608K Buy
22,528
+1,924
+9% +$56.4K 0.02% 540
2015
Q3 		$639K Sell
20,604
-1,420
-6% -$42.4K 0.02% 535
2015
Q2 		$682K Buy
22,024
+3,224
+17% +$113K 0.02% 543
2015
Q1 		$685K Sell
18,800
-1,314
-7% -$50.7K 0.02% 559
2014
Q4 		$777K Sell
20,114
-122,777
-86% -$4.47M 0.02% 544
2014
Q3 		$4.67M Sell
142,891
-4,150
-3% -$135K 0.14% 167
2014
Q2 		$4.82M Buy
147,041
+130,739
+802% +$3.55M 0.14% 169
2014
Q1 		$415K Sell
16,302
-161
-1% -$4.12K 0.01% 715
2013
Q4 		$461K Sell
16,463
-4,394
-21% -$113K 0.01% 710
2013
Q3 		$520K Sell
20,857
-82
-0.4% -$2.08K 0.01% 678
2013
Q2 		$514K Buy
+20,939
New +$676K 0.01% 666

Other funds holding IRM

Robeco Institutional Asset Management
Robeco Institutional Asset Management Rotterdam, Netherlands $81.4B AUM 40.71% 1-Year Est. Return
Swedbank
Swedbank Stockholm, Sweden $116B AUM 46.87% 1-Year Est. Return
COPPSERS
Commonwealth of Pennsylvania Public School Employees Retirement System Harrisburg, Pennsylvania $20.6B AUM 37.37% 1-Year Est. Return
New York State Teachers Retirement System (NYSTRS)
New York State Teachers Retirement System (NYSTRS) Albany, New York $54.2B AUM 43.77% 1-Year Est. Return
Handelsbanken Fonder
Handelsbanken Fonder Stockholm, Sweden $35.1B AUM 47.76% 1-Year Est. Return
SOADOR
State of Alaska Department of Revenue Juneau, Alaska $10.1B AUM 42.83% 1-Year Est. Return
TA
Tectonic Advisors Frisco, Texas $2.08B AUM 16.31% 1-Year Est. Return
VAM
Vert Asset Management Sausalito, California $365M AUM 18.19% 1-Year Est. Return
BCM
Brookstone Capital Management Wheaton, Illinois $9.99B AUM 23.61% 1-Year Est. Return
TTWM
TCV Trust & Wealth Management Richmond, Virginia $1.32B AUM 24.29% 1-Year Est. Return

Sumitomo Mitsui DS Asset Management's IRM Position: Q2 2026 in Review

Sumitomo Mitsui DS Asset Management increased its Iron Mountain (IRM) stake by 2.8% in Q2 2026, buying an estimated $381K and bringing the position to 112,827 shares worth $14.3M. The position accounts for 0.1% of the portfolio, ranked #166.

Sumitomo Mitsui DS Asset Management first reported a position in IRM in Q2 2013 and has held it in 53 quarters since. 295 funds tracked by Wall St. Rank hold IRM as of Q2 2026.

  • Sumitomo Mitsui DS Asset Management held 112,827 shares of Iron Mountain worth $14.3M as of Q2 2026.
  • Sumitomo Mitsui DS Asset Management bought 3,105 Iron Mountain shares in Q2 2026, an estimated $381K.
  • Iron Mountain made up 0.1% of Sumitomo Mitsui DS Asset Management's portfolio in Q2 2026, its #166 holding.
  • Sumitomo Mitsui DS Asset Management first reported a position in Iron Mountain in Q2 2013 and has held it in 53 quarters since.
  • 295 funds tracked by Wall St. Rank held Iron Mountain as of Q2 2026.

Based on Sumitomo Mitsui DS Asset Management's 13F filing for Q2 2026, filed 22 Jul 2026.