State of Wisconsin Investment Board’s Iron Mountain IRM Stock Holding History
Bought
Maintained
Sold
| Quarter | Market Value | Status | Shares |
Change in Stake | Trade Value | Portfolio Weight | Portfolio Position | |
|---|---|---|---|---|---|---|---|---|
|
2026
Q1 | $18M | Buy |
176,520
+3,383
| +2% | +$337K | 0.04% | 381 |
|
|
2025
Q4 | $14.4M | Sell |
173,137
-1,709
| -1% | -$160K | 0.03% | 491 |
|
|
2025
Q3 | $17.8M | Sell |
174,846
-5,820
| -3% | -$561K | 0.04% | 384 |
|
|
2025
Q2 | $18.5M | Sell |
180,666
-7,121
| -4% | -$671K | 0.05% | 359 |
|
|
2025
Q1 | $16.2M | Buy |
187,787
+9,159
| +5% | +$883K | 0.04% | 390 |
|
|
2024
Q4 | $18.8M | Sell |
178,628
-8,127
| -4% | -$955K | 0.05% | 354 |
|
|
2024
Q3 | $22.2M | Buy |
186,755
+18,520
| +11% | +$1.98M | 0.06% | 329 |
|
|
2024
Q2 | $15.1M | Sell |
168,235
-598
| -0.4% | -$48.4K | 0.04% | 406 |
|
|
2024
Q1 | $13.5M | Sell |
168,833
-21,003
| -11% | -$1.52M | 0.04% | 476 |
|
|
2023
Q4 | $13.3M | Buy |
189,836
+2,959
| +2% | +$186K | 0.04% | 468 |
|
|
2023
Q3 | $11.1M | Buy |
186,877
+17,439
| +10% | +$1.07M | 0.03% | 510 |
|
|
2023
Q2 | $9.63M | Buy |
169,438
+9,631
| +6% | +$527K | 0.03% | 627 |
|
|
2023
Q1 | $8.46M | Buy |
159,807
+50,566
| +46% | +$2.65M | 0.03% | 674 |
|
|
2022
Q4 | $5.45M | Buy |
109,241
+12,130
| +12% | +$612K | 0.02% | 886 |
|
|
2022
Q3 | $4.27M | Sell |
97,111
-29,795
| -23% | -$1.5M | 0.01% | 1017 |
|
|
2022
Q2 | $6.18M | Sell |
126,906
-7,562
| -6% | -$398K | 0.02% | 889 |
|
|
2022
Q1 | $7.45M | Sell |
134,468
-1,577
| -1% | -$75.1K | 0.02% | 948 |
|
|
2021
Q4 | $7.12M | Sell |
136,045
-2,271
| -2% | -$107K | 0.01% | 907 |
|
|
2021
Q3 | $6.01M | Buy |
138,316
+9,516
| +7% | +$428K | 0.01% | 977 |
|
|
2021
Q2 | $5.45M | Sell |
128,800
-4,607
| -3% | -$193K | 0.01% | 1019 |
|
|
2021
Q1 | $4.94M | Sell |
133,407
-4,448
| -3% | -$149K | 0.01% | 1025 |
|
|
2020
Q4 | $4.06M | Sell |
137,855
-13,660
| -9% | -$379K | 0.01% | 1054 |
|
|
2020
Q3 | $4.06M | Buy |
151,515
+890
| +0.6% | +$25.3K | 0.01% | 999 |
|
|
2020
Q2 | $3.93M | Sell |
150,625
-2,610
| -2% | -$65.9K | 0.01% | 957 |
|
|
2020
Q1 | $3.65M | Sell |
153,235
-42,448
| -22% | -$1.28M | 0.01% | 897 |
|
|
2019
Q4 | $6.24M | Buy |
+195,683
| New | +$6.42M | 0.02% | 869 |
|
|
2019
Q3 | – | Sell |
-49,096
| Closed | -$1.54M | – | 1560 |
|
|
2019
Q2 | $1.54M | Buy |
+49,096
| New | +$1.61M | ﹤0.01% | 1059 |
|
|
2018
Q4 | – | Sell |
-179,668
| Closed | -$6.2M | – | 1558 |
|
|
2018
Q3 | $6.2M | Sell |
179,668
-50,977
| -22% | -$1.82M | 0.02% | 810 |
|
|
2018
Q2 | $8.07M | Buy |
230,645
+969
| +0.4% | +$32.7K | 0.02% | 734 |
|
|
2018
Q1 | $7.55M | Sell |
229,676
-14,701
| -6% | -$495K | 0.02% | 743 |
|
|
2017
Q4 | $9.22M | Sell |
244,377
-1,645
| -0.7% | -$65.3K | 0.03% | 668 |
|
|
2017
Q3 | $9.57M | Buy |
246,022
+2,363
| +1% | +$88.3K | 0.03% | 615 |
|
|
2017
Q2 | $8.37M | Sell |
243,659
-7,372
| -3% | -$258K | 0.03% | 633 |
|
|
2017
Q1 | $8.95M | Buy |
251,031
+27,989
| +13% | +$991K | 0.03% | 557 |
|
|
2016
Q4 | $7.24M | Sell |
223,042
-25,430
| -10% | -$845K | 0.03% | 596 |
|
|
2016
Q3 | $9.32M | Sell |
248,472
-5,800
| -2% | -$224K | 0.04% | 543 |
|
|
2016
Q2 | $10.1M | Buy |
254,272
+39,340
| +18% | +$1.43M | 0.04% | 496 |
|
|
2016
Q1 | $7.29M | Sell |
214,932
-6,050
| -3% | -$174K | 0.03% | 628 |
|
|
2015
Q4 | $5.97M | Sell |
220,982
-2,000
| -0.9% | -$58.7K | 0.02% | 705 |
|
|
2015
Q3 | $6.92M | Sell |
222,982
-4,330
| -2% | -$129K | 0.03% | 646 |
|
|
2015
Q2 | $7.05M | Buy |
227,312
+30,930
| +16% | +$1.08M | 0.02% | 690 |
|
|
2015
Q1 | $7.16M | Sell |
196,382
-3,720
| -2% | -$144K | 0.02% | 686 |
|
|
2014
Q4 | $7.74M | Buy |
200,102
+18,238
| +10% | +$663K | 0.03% | 644 |
|
|
2014
Q3 | $5.94M | Sell |
181,864
-200,963
| -52% | -$6.52M | 0.02% | 739 |
|
|
2014
Q2 | $12.5M | Sell |
382,827
-25,708
| -6% | -$697K | 0.05% | 477 |
|
|
2014
Q1 | $10.4M | Buy |
408,535
+238
| +0.1% | +$6.09K | 0.04% | 536 |
|
|
2013
Q4 | $11.5M | Sell |
408,297
-4,014
| -1% | -$103K | 0.04% | 492 |
|
|
2013
Q3 | $10.3M | Buy |
412,311
+116,953
| +40% | +$2.97M | 0.04% | 529 |
|
|
2013
Q2 | $7.26M | Buy |
+295,358
| New | +$9.53M | 0.03% | 654 |
|
Other funds holding IRM
VPM
VCM
State of Wisconsin Investment Board's IRM Position: Q1 2026 in Review
State of Wisconsin Investment Board increased its Iron Mountain (IRM) stake by 2% in Q1 2026, buying an estimated $337K and bringing the position to 176,520 shares worth $18M. The position accounts for 0.04% of the portfolio, ranked #381.
State of Wisconsin Investment Board first reported a position in IRM in Q2 2013 and has held it in 49 quarters since. The position peaked at $22.2M in Q3 2024. 1,086 funds tracked by Wall St. Rank hold IRM as of Q1 2026.
- State of Wisconsin Investment Board held 176,520 shares of Iron Mountain worth $18M as of Q1 2026.
- State of Wisconsin Investment Board bought 3,383 Iron Mountain shares in Q1 2026, an estimated $337K.
- Iron Mountain made up 0.04% of State of Wisconsin Investment Board's portfolio in Q1 2026, its #381 holding.
- State of Wisconsin Investment Board first reported a position in Iron Mountain in Q2 2013 and has held it in 49 quarters since.
- State of Wisconsin Investment Board's Iron Mountain position peaked at $22.2M in Q3 2024.
- 1,086 funds tracked by Wall St. Rank held Iron Mountain as of Q1 2026.
Based on State of Wisconsin Investment Board's 13F filing for Q1 2026, filed 15 May 2026.