Millennium 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 | $38.2M | Sell |
374,463
-114,551
| -23% | -$11.4M | 0.02% | 1039 |
|
|
2025
Q4 | $40.6M | Buy |
489,014
+3,597
| +0.7% | +$337K | 0.02% | 953 |
|
|
2025
Q3 | $49.5M | Sell |
485,417
-90,552
| -16% | -$8.72M | 0.02% | 881 |
|
|
2025
Q2 | $59.1M | Sell |
575,969
-119,925
| -17% | -$11.3M | 0.03% | 708 |
|
|
2025
Q1 | $59.9M | Buy |
695,894
+666,681
| +2,282% | +$64.2M | 0.03% | 642 |
|
|
2024
Q4 | $3.07M | Sell |
29,213
-100,029
| -77% | -$11.8M | ﹤0.01% | 3284 |
|
|
2024
Q3 | $15.4M | Buy |
129,242
+51,205
| +66% | +$5.48M | 0.01% | 1793 |
|
|
2024
Q2 | $6.99M | Sell |
78,037
-880,480
| -92% | -$71.3M | ﹤0.01% | 2393 |
|
|
2024
Q1 | $76.9M | Buy |
958,517
+897,862
| +1,480% | +$65M | 0.03% | 595 |
|
|
2023
Q4 | $4.24M | Sell |
60,655
-34,431
| -36% | -$2.16M | ﹤0.01% | 2920 |
|
|
2023
Q3 | $5.65M | Sell |
95,086
-345,601
| -78% | -$21.1M | ﹤0.01% | 2590 |
|
|
2023
Q2 | $25M | Buy |
440,687
+269,813
| +158% | +$14.8M | 0.01% | 1206 |
|
|
2023
Q1 | $9.04M | Buy |
170,874
+135,947
| +389% | +$7.12M | 0.01% | 2064 |
|
|
2022
Q4 | $1.74M | Sell |
34,927
-267,809
| -88% | -$13.5M | ﹤0.01% | 3678 |
|
|
2022
Q3 | $13.3M | Sell |
302,736
-426,331
| -58% | -$21.5M | 0.01% | 1800 |
|
|
2022
Q2 | $35.5M | Buy |
729,067
+578,814
| +385% | +$30.5M | 0.02% | 848 |
|
|
2022
Q1 | $8.33M | Sell |
150,253
-56,671
| -27% | -$2.7M | ﹤0.01% | 2355 |
|
|
2021
Q4 | $10.8M | Buy |
206,924
+29,090
| +16% | +$1.37M | 0.01% | 2070 |
|
|
2021
Q3 | $7.73M | Sell |
177,834
-169,402
| -49% | -$7.62M | ﹤0.01% | 2373 |
|
|
2021
Q2 | $14.7M | Sell |
347,236
-185,229
| -35% | -$7.77M | 0.01% | 1494 |
|
|
2021
Q1 | $19.7M | Sell |
532,465
-347,406
| -39% | -$11.6M | 0.01% | 1106 |
|
|
2020
Q4 | $25.9M | Sell |
879,871
-235,937
| -21% | -$6.55M | 0.02% | 880 |
|
|
2020
Q3 | $29.9K | Buy |
1,115,808
+1,104,155
| +9,475% | +$31.4M | 0.04% | 562 |
|
|
2020
Q2 | $304K | Sell |
11,653
-595,831
| -98% | -$15M | ﹤0.01% | 3655 |
|
|
2020
Q1 | $14.5M | Buy |
+607,484
| New | +$18.4M | 0.03% | 617 |
|
|
2019
Q4 | – | Sell |
-367,629
| Closed | -$11.9M | – | 4416 |
|
|
2019
Q3 | $11.9M | Buy |
367,629
+226,765
| +161% | +$7.12M | 0.02% | 1161 |
|
|
2019
Q2 | $4.41M | Sell |
140,864
-1,038,423
| -88% | -$34M | 0.01% | 1871 |
|
|
2019
Q1 | $41.8M | Buy |
1,179,287
+1,166,635
| +9,221% | +$41.2M | 0.06% | 407 |
|
|
2018
Q4 | $410K | Sell |
12,652
-18,342
| -59% | -$602K | ﹤0.01% | 3073 |
|
|
2018
Q3 | $1.07M | Buy |
+30,994
| New | +$1.1M | ﹤0.01% | 2838 |
|
|
2018
Q2 | – | Sell |
-669,395
| Closed | -$22M | – | 3964 |
|
|
2018
Q1 | $22M | Buy |
+669,395
| New | +$22.6M | 0.03% | 818 |
|
|
2017
Q3 | – | Sell |
-71,597
| Closed | -$2.46M | – | 3683 |
|
|
2017
Q2 | $2.46M | Buy |
+71,597
| New | +$2.5M | ﹤0.01% | 1961 |
|
|
2016
Q2 | – | Sell |
-745,873
| Closed | -$25.3M | – | 3361 |
|
|
2016
Q1 | $25.3M | Buy |
745,873
+271,605
| +57% | +$7.8M | 0.06% | 385 |
|
|
2015
Q4 | $12.8M | Buy |
+474,268
| New | +$13.9M | 0.03% | 798 |
|
|
2015
Q1 | – | Sell |
-773,649
| Closed | -$29.9M | – | 3836 |
|
|
2014
Q4 | $29.9M | Buy |
773,649
+349,128
| +82% | +$12.7M | 0.06% | 419 |
|
|
2014
Q3 | $13.9M | Sell |
424,521
-8,818
| -2% | -$286K | 0.04% | 686 |
|
|
2014
Q2 | $14.2M | Sell |
433,339
-555,108
| -56% | -$15.1M | 0.04% | 640 |
|
|
2014
Q1 | $25.2M | Buy |
+988,447
| New | +$25.3M | 0.07% | 363 |
|
|
2013
Q4 | – | Sell |
-179,743
| Closed | -$4.6M | – | 3589 |
|
|
2013
Q3 | $4.49M | Sell |
179,743
-75,245
| -30% | -$1.91M | 0.01% | 1183 |
|
|
2013
Q2 | $6.27M | Buy |
+254,988
| New | +$8.23M | 0.02% | 882 |
|
Other funds holding IRM
VPM
VCM
Millennium Management's IRM Position: Q1 2026 in Review
Millennium Management reduced its Iron Mountain (IRM) stake by 23% in Q1 2026, selling an estimated $11.4M and leaving 374,463 shares worth $38.2M. The position accounts for 0.02% of the portfolio, ranked #1039.
Millennium Management first reported a position in IRM in Q2 2013 and has held it in 40 quarters since. The position peaked at $76.9M in Q1 2024. 1,082 funds tracked by Wall St. Rank hold IRM as of Q1 2026.
- Millennium Management held 374,463 shares of Iron Mountain worth $38.2M as of Q1 2026.
- Millennium Management sold 114,551 Iron Mountain shares in Q1 2026, an estimated $11.4M.
- Iron Mountain made up 0.02% of Millennium Management's portfolio in Q1 2026, its #1039 holding.
- Millennium Management first reported a position in Iron Mountain in Q2 2013 and has held it in 40 quarters since.
- Millennium Management's Iron Mountain position peaked at $76.9M in Q1 2024.
- 1,082 funds tracked by Wall St. Rank held Iron Mountain as of Q1 2026.
Based on Millennium Management's 13F filing for Q1 2026, filed 15 May 2026.