Two Sigma Advisers’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 | – | Sell |
-130,324
| Closed | -$10.8M | – | 1062 |
|
|
2025
Q4 | $10.8M | Buy |
130,324
+123,824
| +1,905% | +$11.6M | 0.02% | 517 |
|
|
2025
Q3 | $663K | Sell |
6,500
-29,600
| -82% | -$2.85M | ﹤0.01% | 1647 |
|
|
2025
Q2 | $3.7M | Sell |
36,100
-26,600
| -42% | -$2.51M | 0.01% | 851 |
|
|
2025
Q1 | $5.39M | Buy |
62,700
+55,000
| +714% | +$5.3M | 0.01% | 760 |
|
|
2024
Q4 | $809K | Buy |
+7,700
| New | +$905K | ﹤0.01% | 1561 |
|
|
2021
Q4 | – | Sell |
-36,100
| Closed | -$1.57M | – | 2714 |
|
|
2021
Q3 | $1.57M | Sell |
36,100
-18,800
| -34% | -$846K | ﹤0.01% | 1386 |
|
|
2021
Q2 | $2.32M | Sell |
54,900
-28,300
| -34% | -$1.19M | 0.01% | 1221 |
|
|
2021
Q1 | $3.08M | Sell |
83,200
-9,300
| -10% | -$311K | 0.01% | 1061 |
|
|
2020
Q4 | $2.73M | Sell |
92,500
-311,300
| -77% | -$8.64M | 0.01% | 1098 |
|
|
2020
Q3 | $10.8M | Buy |
403,800
+58,500
| +17% | +$1.66M | 0.03% | 508 |
|
|
2020
Q2 | $9.01M | Sell |
345,300
-190,724
| -36% | -$4.82M | 0.03% | 590 |
|
|
2020
Q1 | $12.8M | Buy |
536,024
+141,324
| +36% | +$4.28M | 0.05% | 412 |
|
|
2019
Q4 | $12.6M | Sell |
394,700
-41,300
| -9% | -$1.35M | 0.03% | 518 |
|
|
2019
Q3 | $14.1M | Sell |
436,000
-46,100
| -10% | -$1.45M | 0.03% | 459 |
|
|
2019
Q2 | $15.1M | Sell |
482,100
-60,600
| -11% | -$1.99M | 0.04% | 473 |
|
|
2019
Q1 | $19.2M | Buy |
542,700
+420,300
| +343% | +$14.8M | 0.05% | 426 |
|
|
2018
Q4 | $3.97M | Buy |
122,400
+98,653
| +415% | +$3.24M | 0.01% | 887 |
|
|
2018
Q3 | $820K | Buy |
+23,747
| New | +$846K | ﹤0.01% | 1581 |
|
|
2018
Q2 | – | Sell |
-144,147
| Closed | -$4.74M | – | 2424 |
|
|
2018
Q1 | $4.74M | Buy |
144,147
+7,900
| +6% | +$266K | 0.01% | 867 |
|
|
2017
Q4 | $5.14M | Buy |
136,247
+11,400
| +9% | +$452K | 0.01% | 835 |
|
|
2017
Q3 | $4.86M | Buy |
124,847
+98,100
| +367% | +$3.67M | 0.01% | 806 |
|
|
2017
Q2 | $919K | Buy |
26,747
+15,676
| +142% | +$548K | ﹤0.01% | 1556 |
|
|
2017
Q1 | $395K | Sell |
11,071
-40,112
| -78% | -$1.42M | ﹤0.01% | 1986 |
|
|
2016
Q4 | $1.66M | Sell |
51,183
-76
| -0.1% | -$2.53K | 0.01% | 1279 |
|
|
2016
Q3 | $1.92M | Sell |
51,259
-108,924
| -68% | -$4.2M | 0.01% | 1048 |
|
|
2016
Q2 | $6.38M | Buy |
160,183
+82,000
| +105% | +$2.98M | 0.03% | 482 |
|
|
2016
Q1 | $2.65M | Sell |
78,183
-80,261
| -51% | -$2.31M | 0.01% | 697 |
|
|
2015
Q4 | $4.28M | Buy |
158,444
+137,334
| +651% | +$4.03M | 0.03% | 494 |
|
|
2015
Q3 | $655K | Buy |
+21,110
| New | +$630K | ﹤0.01% | 1178 |
|
|
2014
Q1 | – | Sell |
-50,004
| Closed | -$1.4M | – | 2391 |
|
|
2013
Q4 | $1.4M | Buy |
50,004
+11,794
| +31% | +$302K | 0.01% | 948 |
|
|
2013
Q3 | $954K | Sell |
38,210
-121,426
| -76% | -$3.08M | 0.01% | 984 |
|
|
2013
Q2 | $3.93M | Buy |
+159,636
| New | +$5.15M | 0.06% | 303 |
|
Other funds holding IRM
Two Sigma Advisers's IRM Position: Q1 2026 in Review
Two Sigma Advisers sold out of Iron Mountain (IRM) in Q1 2026, closing a stake of 130,324 shares — an estimated $10.8M sold.
Two Sigma Advisers first reported a position in IRM in Q2 2013 and held it in 32 quarters. The position peaked at $19.2M in Q1 2019. 1,090 funds tracked by Wall St. Rank hold IRM as of Q1 2026.
- Two Sigma Advisers reported no remaining Iron Mountain position as of Q1 2026 after selling out during the quarter.
- Two Sigma Advisers sold 130,324 Iron Mountain shares in Q1 2026, an estimated $10.8M.
- Two Sigma Advisers first reported a position in Iron Mountain in Q2 2013 and held it in 32 quarters.
- Two Sigma Advisers's Iron Mountain position peaked at $19.2M in Q1 2019.
- 1,090 funds tracked by Wall St. Rank held Iron Mountain as of Q1 2026.
Based on Two Sigma Advisers's 13F filing for Q1 2026.