Brown Brothers Harriman & Co’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
Q2 | $1.03M | Buy |
8,157
+2,926
| +56% | +$359K | ﹤0.01% | 496 |
|
|
2026
Q1 | $534K | Buy |
5,231
+3,137
| +150% | +$312K | ﹤0.01% | 583 |
|
|
2025
Q4 | $174K | Buy |
2,094
+414
| +25% | +$38.7K | ﹤0.01% | 794 |
|
|
2025
Q3 | $171K | Sell |
1,680
-3,815
| -69% | -$368K | ﹤0.01% | 730 |
|
|
2025
Q2 | $564K | Buy |
5,495
+515
| +10% | +$48.5K | ﹤0.01% | 427 |
|
|
2025
Q1 | $428K | Sell |
4,980
-577
| -10% | -$55.6K | ﹤0.01% | 422 |
|
|
2024
Q4 | $584K | Sell |
5,557
-2,978
| -35% | -$350K | ﹤0.01% | 381 |
|
|
2024
Q3 | $1.01M | Buy |
8,535
+6
| +0.1% | +$642 | 0.01% | 290 |
|
|
2024
Q2 | $764K | Sell |
8,529
-228
| -3% | -$18.5K | 0.01% | 320 |
|
|
2024
Q1 | $702K | Hold |
8,757
| – | – | 0.01% | 317 |
|
|
2023
Q4 | $613K | Hold |
8,757
| – | – | 0.01% | 328 |
|
|
2023
Q3 | $521K | Buy |
8,757
+3,940
| +82% | +$241K | ﹤0.01% | 339 |
|
|
2023
Q2 | $274K | Sell |
4,817
-3
| -0.1% | -$164 | ﹤0.01% | 425 |
|
|
2023
Q1 | $255K | Buy |
4,820
+187
| +4% | +$9.8K | ﹤0.01% | 442 |
|
|
2022
Q4 | $231K | Sell |
4,633
-99
| -2% | -$5K | ﹤0.01% | 451 |
|
|
2022
Q3 | $208K | Hold |
4,732
| – | – | ﹤0.01% | 455 |
|
|
2022
Q2 | $230K | Buy |
4,732
+99
| +2% | +$5.21K | ﹤0.01% | 435 |
|
|
2022
Q1 | $257K | Sell |
4,633
-24
| -0.5% | -$1.14K | ﹤0.01% | 464 |
|
|
2021
Q4 | $244K | Hold |
4,657
| – | – | ﹤0.01% | 448 |
|
|
2021
Q3 | $202K | Hold |
4,657
| – | – | ﹤0.01% | 453 |
|
|
2021
Q2 | $197K | Buy |
4,657
+4
| +0.1% | +$168 | ﹤0.01% | 443 |
|
|
2021
Q1 | $172K | Buy |
4,653
+24
| +0.5% | +$802 | ﹤0.01% | 444 |
|
|
2020
Q4 | $136K | Buy |
+4,629
| New | +$128K | ﹤0.01% | 504 |
|
|
2020
Q2 | – | Sell |
-20
| Closed | – | – | 1082 |
|
|
2020
Q1 | $0 | Buy |
+20
| New | +$605 | ﹤0.01% | 1195 |
|
|
2019
Q4 | – | Sell |
-125
| Closed | -$4K | – | 1189 |
|
|
2019
Q3 | $4K | Buy |
125
+106
| +558% | +$3.33K | ﹤0.01% | 1019 |
|
|
2019
Q2 | $1K | Sell |
19
-29
| -60% | -$950 | ﹤0.01% | 1022 |
|
|
2019
Q1 | $2K | Buy |
+48
| New | +$1.7K | ﹤0.01% | 953 |
|
|
2018
Q2 | – | Sell |
-371
| Closed | -$12K | – | 837 |
|
|
2018
Q1 | $12K | Hold |
371
| – | – | ﹤0.01% | 643 |
|
|
2017
Q4 | $14K | Hold |
371
| – | – | ﹤0.01% | 708 |
|
|
2017
Q3 | $14K | Hold |
371
| – | – | ﹤0.01% | 632 |
|
|
2017
Q2 | $13K | Hold |
371
| – | – | ﹤0.01% | 638 |
|
|
2017
Q1 | $13K | Buy |
371
+36
| +11% | +$1.27K | ﹤0.01% | 631 |
|
|
2016
Q4 | $11K | Hold |
335
| – | – | ﹤0.01% | 691 |
|
|
2016
Q3 | $13K | Hold |
335
| – | – | ﹤0.01% | 598 |
|
|
2016
Q2 | $13K | Sell |
335
-1,000
| -75% | -$36.4K | ﹤0.01% | 602 |
|
|
2016
Q1 | $45K | Sell |
1,335
-2,360
| -64% | -$67.8K | ﹤0.01% | 449 |
|
|
2015
Q4 | $100K | Hold |
3,695
| – | – | ﹤0.01% | 393 |
|
|
2015
Q3 | $115K | Buy |
3,695
+1,360
| +58% | +$40.6K | ﹤0.01% | 380 |
|
|
2015
Q2 | $72K | Hold |
2,335
| – | – | ﹤0.01% | 467 |
|
|
2015
Q1 | $85K | Hold |
2,335
| – | – | ﹤0.01% | 442 |
|
|
2014
Q4 | $90K | Buy |
2,335
+157
| +7% | +$5.71K | ﹤0.01% | 455 |
|
|
2014
Q3 | $71K | Sell |
2,178
-179
| -8% | -$5.8K | ﹤0.01% | 472 |
|
|
2014
Q2 | $77K | Hold |
2,357
| – | – | ﹤0.01% | 462 |
|
|
2014
Q1 | $60K | Sell |
2,357
-2,356
| -50% | -$60.3K | ﹤0.01% | 472 |
|
|
2013
Q4 | $132K | Buy |
4,713
+2,356
| +100% | +$60.4K | ﹤0.01% | 426 |
|
|
2013
Q3 | $59K | Hold |
2,357
| – | – | ﹤0.01% | 448 |
|
|
2013
Q2 | $58K | Buy |
+2,357
| New | +$76.1K | ﹤0.01% | 517 |
|
Other funds holding IRM
Brown Brothers Harriman & Co's IRM Position: Q2 2026 in Review
Brown Brothers Harriman & Co increased its Iron Mountain (IRM) stake by 56% in Q2 2026, buying an estimated $359K and bringing the position to 8,157 shares worth $1.03M. The position accounts for ﹤0.01% of the portfolio, ranked #496.
Brown Brothers Harriman & Co first reported a position in IRM in Q2 2013 and has held it in 47 quarters since. 1,165 funds tracked by Wall St. Rank hold IRM as of Q2 2026.
- Brown Brothers Harriman & Co held 8,157 shares of Iron Mountain worth $1.03M as of Q2 2026.
- Brown Brothers Harriman & Co bought 2,926 Iron Mountain shares in Q2 2026, an estimated $359K.
- Iron Mountain made up ﹤0.01% of Brown Brothers Harriman & Co's portfolio in Q2 2026, its #496 holding.
- Brown Brothers Harriman & Co first reported a position in Iron Mountain in Q2 2013 and has held it in 47 quarters since.
- 1,165 funds tracked by Wall St. Rank held Iron Mountain as of Q2 2026.
Based on Brown Brothers Harriman & Co's 13F filing for Q2 2026, filed 12 Aug 2026.