Twin Tree Management’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 |
-8,500
| Closed | -$705K | – | 1487 |
|
|
2025
Q4 | $705K | Buy |
+8,500
| New | +$796K | 0.01% | 1071 |
|
|
2024
Q3 | – | Sell |
-6,800
| Closed | -$609K | – | 1645 |
|
|
2024
Q2 | $609K | Sell |
6,800
-13,900
| -67% | -$1.12M | ﹤0.01% | 1109 |
|
|
2024
Q1 | $1.66M | Sell |
20,700
-110,400
| -84% | -$7.99M | ﹤0.01% | 1009 |
|
|
2023
Q4 | $9.17M | Sell |
131,100
-262,100
| -67% | -$16.4M | 0.02% | 711 |
|
|
2023
Q3 | $23.4M | Sell |
393,200
-129,700
| -25% | -$7.93M | 0.05% | 314 |
|
|
2023
Q2 | $29.7M | Sell |
522,900
-236,200
| -31% | -$12.9M | 0.05% | 313 |
|
|
2023
Q1 | $40.2M | Sell |
759,100
-107,500
| -12% | -$5.63M | 0.07% | 226 |
|
|
2022
Q4 | $43.2M | Sell |
866,600
-489,100
| -36% | -$24.7M | 0.09% | 200 |
|
|
2022
Q3 | $59.6M | Buy |
1,355,700
+640,500
| +90% | +$32.3M | 0.11% | 147 |
|
|
2022
Q2 | $34.8M | Buy |
715,200
+235,500
| +49% | +$12.4M | 0.06% | 257 |
|
|
2022
Q1 | $26.6M | Buy |
+479,700
| New | +$22.8M | 0.04% | 380 |
|
|
2021
Q4 | – | Sell |
-8,400
| Closed | -$365K | – | 1703 |
|
|
2021
Q3 | $365K | Sell |
8,400
-60,100
| -88% | -$2.71M | ﹤0.01% | 1332 |
|
|
2021
Q2 | $2.9M | Sell |
68,500
-515,800
| -88% | -$21.6M | 0.01% | 809 |
|
|
2021
Q1 | $21.6M | Buy |
584,300
+526,100
| +904% | +$17.6M | 0.08% | 268 |
|
|
2020
Q4 | $1.72M | Buy |
58,200
+37,000
| +175% | +$1.03M | 0.01% | 886 |
|
|
2020
Q3 | $568K | Sell |
21,200
-34,000
| -62% | -$967K | ﹤0.01% | 959 |
|
|
2020
Q2 | $1.44M | Sell |
55,200
-300
| -0.5% | -$7.58K | 0.01% | 967 |
|
|
2020
Q1 | $1.32M | Sell |
55,500
-104,400
| -65% | -$3.16M | 0.01% | 803 |
|
|
2019
Q4 | $5.1M | Sell |
159,900
-126,100
| -44% | -$4.13M | 0.02% | 507 |
|
|
2019
Q3 | $9.26M | Buy |
286,000
+257,500
| +904% | +$8.09M | 0.04% | 347 |
|
|
2019
Q2 | $892K | Buy |
+28,500
| New | +$934K | ﹤0.01% | 828 |
|
|
2018
Q4 | – | Sell |
-14,200
| Closed | -$490K | – | 1420 |
|
|
2018
Q3 | $490K | Sell |
14,200
-6,300
| -31% | -$224K | ﹤0.01% | 843 |
|
|
2018
Q2 | $718K | Buy |
+20,500
| New | +$692K | ﹤0.01% | 842 |
|
|
2018
Q1 | – | Sell |
-6,600
| Closed | -$249K | – | 1199 |
|
|
2017
Q4 | $249K | Hold |
6,600
| – | – | ﹤0.01% | 873 |
|
|
2017
Q3 | $257K | Buy |
+6,600
| New | +$247K | ﹤0.01% | 811 |
|
Other funds holding IRM
VPM
VCM
Twin Tree Management's IRM Position: Q4 2025 in Review
Twin Tree Management sold out of Iron Mountain (IRM) in Q4 2025, closing a stake of 6,576 shares — an estimated $615K sold.
Twin Tree Management first reported a position in IRM in Q1 2015 and held it in 18 quarters. The position peaked at $32.6M in Q3 2024. 1,006 funds tracked by Wall St. Rank hold IRM as of Q4 2025.
- Twin Tree Management reported no remaining Iron Mountain position as of Q4 2025 after selling out during the quarter.
- Twin Tree Management sold 6,576 Iron Mountain shares in Q4 2025, an estimated $615K.
- Twin Tree Management first reported a position in Iron Mountain in Q1 2015 and held it in 18 quarters.
- Twin Tree Management's Iron Mountain position peaked at $32.6M in Q3 2024.
- 1,006 funds tracked by Wall St. Rank held Iron Mountain as of Q4 2025.
Based on Twin Tree Management's 13F filing for Q4 2025, filed 11 Feb 2026.