Vanguard Group’s Iron Mountain IRM Stock Holding History
Bought
Maintained
Sold
| Quarter | Market Value | Status | Shares |
Change in Stake | Trade Value | Portfolio Weight | Portfolio Position | |
|---|---|---|---|---|---|---|---|---|
|
2025
Q4 | $3.87B | Sell |
46,627,483
-625,617
| -1% | -$58.6M | 0.06% | 315 |
|
|
2025
Q3 | $4.82B | Buy |
47,253,100
+188,213
| +0.4% | +$18.1M | 0.07% | 268 |
|
|
2025
Q2 | $4.83B | Buy |
47,064,887
+239,153
| +0.5% | +$22.5M | 0.08% | 254 |
|
|
2025
Q1 | $4.03B | Buy |
46,825,734
+220,564
| +0.5% | +$21.3M | 0.07% | 270 |
|
|
2024
Q4 | $4.9B | Buy |
46,605,170
+1,332
| +0% | +$157K | 0.09% | 216 |
|
|
2024
Q3 | $5.54B | Sell |
46,603,838
-39,514
| -0.1% | -$4.23M | 0.1% | 178 |
|
|
2024
Q2 | $4.18B | Buy |
46,643,352
+266,118
| +0.6% | +$21.5M | 0.08% | 241 |
|
|
2024
Q1 | $3.72B | Buy |
46,377,234
+102,124
| +0.2% | +$7.39M | 0.07% | 276 |
|
|
2023
Q4 | $3.24B | Sell |
46,275,110
-337,656
| -0.7% | -$21.2M | 0.07% | 292 |
|
|
2023
Q3 | $2.77B | Sell |
46,612,766
-241,020
| -0.5% | -$14.7M | 0.07% | 299 |
|
|
2023
Q2 | $2.66B | Sell |
46,853,786
-812,878
| -2% | -$44.5M | 0.06% | 330 |
|
|
2023
Q1 | $2.52B | Buy |
47,666,664
+236,740
| +0.5% | +$12.4M | 0.06% | 330 |
|
|
2022
Q4 | $2.36B | Sell |
47,429,924
-16,945
| -0% | -$855K | 0.06% | 338 |
|
|
2022
Q3 | $2.09B | Sell |
47,446,869
-235,842
| -0.5% | -$11.9M | 0.06% | 347 |
|
|
2022
Q2 | $2.32B | Sell |
47,682,711
-653,003
| -1% | -$34.4M | 0.07% | 316 |
|
|
2022
Q1 | $2.68B | Sell |
48,335,714
-96,443
| -0.2% | -$4.59M | 0.06% | 325 |
|
|
2021
Q4 | $2.53B | Sell |
48,432,157
-201,911
| -0.4% | -$9.54M | 0.06% | 361 |
|
|
2021
Q3 | $2.11B | Buy |
48,634,068
+129,949
| +0.3% | +$5.85M | 0.05% | 402 |
|
|
2021
Q2 | $2.05B | Sell |
48,504,119
-118,109
| -0.2% | -$4.95M | 0.05% | 408 |
|
|
2021
Q1 | $1.8B | Buy |
48,622,228
+258,839
| +0.5% | +$8.65M | 0.05% | 422 |
|
|
2020
Q4 | $1.43B | Sell |
48,363,389
-115,131
| -0.2% | -$3.19M | 0.04% | 471 |
|
|
2020
Q3 | $1.3B | Sell |
48,478,520
-351,803
| -0.7% | -$10M | 0.04% | 436 |
|
|
2020
Q2 | $1.27B | Buy |
48,830,323
+115,858
| +0.2% | +$2.93M | 0.05% | 417 |
|
|
2020
Q1 | $1.16B | Buy |
48,714,465
+1,118,899
| +2% | +$33.9M | 0.05% | 397 |
|
|
2019
Q4 | $1.52B | Buy |
47,595,566
+978,112
| +2% | +$32.1M | 0.05% | 410 |
|
|
2019
Q3 | $1.51B | Buy |
46,617,454
+883,488
| +2% | +$27.8M | 0.06% | 379 |
|
|
2019
Q2 | $1.43B | Buy |
45,733,966
+1,111,513
| +2% | +$36.4M | 0.05% | 394 |
|
|
2019
Q1 | $1.58B | Buy |
44,622,453
+747,276
| +2% | +$26.4M | 0.06% | 343 |
|
|
2018
Q4 | $1.42B | Sell |
43,875,177
-26,671
| -0.1% | -$875K | 0.06% | 336 |
|
|
2018
Q3 | $1.52B | Buy |
43,901,848
+138,607
| +0.3% | +$4.94M | 0.06% | 370 |
|
|
2018
Q2 | $1.53B | Sell |
43,763,241
-1,097,049
| -2% | -$37.1M | 0.06% | 349 |
|
|
2018
Q1 | $1.47B | Sell |
44,860,290
-2,829,168
| -6% | -$95.3M | 0.06% | 353 |
|
|
2017
Q4 | $1.8B | Buy |
47,689,458
+3,358,291
| +8% | +$133M | 0.08% | 271 |
|
|
2017
Q3 | $1.72B | Buy |
44,331,167
+932,457
| +2% | +$34.8M | 0.08% | 270 |
|
|
2017
Q2 | $1.49B | Buy |
43,398,710
+151,039
| +0.3% | +$5.28M | 0.07% | 303 |
|
|
2017
Q1 | $1.54B | Buy |
43,247,671
+893,442
| +2% | +$31.6M | 0.08% | 284 |
|
|
2016
Q4 | $1.38B | Buy |
42,354,229
+306,559
| +0.7% | +$10.2M | 0.08% | 289 |
|
|
2016
Q3 | $1.58B | Buy |
42,047,670
+3,934,973
| +10% | +$152M | 0.09% | 232 |
|
|
2016
Q2 | $1.52B | Buy |
38,112,697
+6,510,415
| +21% | +$237M | 0.09% | 231 |
|
|
2016
Q1 | $1.07B | Buy |
31,602,282
+808,473
| +3% | +$23.2M | 0.07% | 316 |
|
|
2015
Q4 | $832M | Buy |
30,793,809
+1,515,161
| +5% | +$44.4M | 0.06% | 385 |
|
|
2015
Q3 | $908M | Sell |
29,278,648
-10,397
| -0% | -$310K | 0.07% | 327 |
|
|
2015
Q2 | $908M | Buy |
29,289,045
+1,228,593
| +4% | +$43M | 0.06% | 361 |
|
|
2015
Q1 | $1.02B | Buy |
28,060,452
+1,793,282
| +7% | +$69.2M | 0.07% | 315 |
|
|
2014
Q4 | $1.02B | Buy |
26,267,170
+13,458,422
| +105% | +$490M | 0.07% | 295 |
|
|
2014
Q3 | $418M | Sell |
12,808,748
-572,222
| -4% | -$18.6M | 0.03% | 577 |
|
|
2014
Q2 | $438M | Buy |
13,380,970
+381,333
| +3% | +$10.3M | 0.03% | 569 |
|
|
2014
Q1 | $331M | Buy |
12,999,637
+429,216
| +3% | +$11M | 0.03% | 670 |
|
|
2013
Q4 | $353M | Buy |
12,570,421
+227,169
| +2% | +$5.82M | 0.03% | 601 |
|
|
2013
Q3 | $308M | Buy |
12,343,252
+337,297
| +3% | +$8.57M | 0.03% | 622 |
|
|
2013
Q2 | $295M | Buy |
+12,005,955
| New | +$387M | 0.03% | 597 |
|
Other funds holding IRM
Vanguard Group's IRM Position: Q4 2025 in Review
Vanguard Group reduced its Iron Mountain (IRM) stake by 1.3% in Q4 2025, selling an estimated $58.6M and leaving 46,627,483 shares worth $3.87B. The position accounts for 0.06% of the portfolio, ranked #315.
Vanguard Group first reported a position in IRM in Q2 2013 and has held it in 51 quarters since. The position peaked at $5.54B in Q3 2024. 1,006 funds tracked by Wall St. Rank hold IRM as of Q4 2025.
- Vanguard Group held 46,627,483 shares of Iron Mountain worth $3.87B as of Q4 2025.
- Vanguard Group sold 625,617 Iron Mountain shares in Q4 2025, an estimated $58.6M.
- Iron Mountain made up 0.06% of Vanguard Group's portfolio in Q4 2025, its #315 holding.
- Vanguard Group first reported a position in Iron Mountain in Q2 2013 and has held it in 51 quarters since.
- Vanguard Group's Iron Mountain position peaked at $5.54B in Q3 2024.
- 1,006 funds tracked by Wall St. Rank held Iron Mountain as of Q4 2025.
Based on Vanguard Group's 13F filing for Q4 2025, filed 29 Jan 2026.