Citigroup’s Iron Mountain IRM Stock Holding History

Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake
Trade Value Portfolio Weight Portfolio Position
2021
Q3
Sell
-100,000
Closed -$4.23M 6046
2021
Q2
$4.23M Hold
100,000
﹤0.01% 2044
2021
Q1
$3.7M Sell
100,000
-20,600
-17% -$689K ﹤0.01% 2025
2020
Q4
$3.56M Buy
120,600
+1,500
+1% +$41.6K ﹤0.01% 2339
2020
Q3
$3.19M Sell
119,100
-33,100
-22% -$942K ﹤0.01% 2252
2020
Q2
$3.97M Buy
152,200
+62,900
+70% +$1.59M ﹤0.01% 2079
2020
Q1
$2.13M Sell
89,300
-19,100
-18% -$578K ﹤0.01% 2416
2019
Q4
$3.45M Sell
108,400
-14,500
-12% -$475K ﹤0.01% 2373
2019
Q3
$3.98M Buy
122,900
+42,600
+53% +$1.34M ﹤0.01% 2151
2019
Q2
$2.51M Buy
80,300
+32,200
+67% +$1.06M ﹤0.01% 2597
2019
Q1
$1.71M Buy
48,100
+43,600
+969% +$1.54M ﹤0.01% 2829
2018
Q4
$146K Sell
4,500
-1,800
-29% -$59K ﹤0.01% 5328
2018
Q3
$217K Sell
6,300
-9,600
-60% -$342K ﹤0.01% 5166
2018
Q2
$557K Buy
15,900
+7,700
+94% +$260K ﹤0.01% 3973
2018
Q1
$269K Sell
8,200
-1,300
-14% -$43.8K ﹤0.01% 4639
2017
Q4
$358K Buy
9,500
+6,300
+197% +$250K ﹤0.01% 4463
2017
Q3
$124K Sell
3,200
-1,300
-29% -$48.6K ﹤0.01% 5389
2017
Q2
$155K Buy
4,500
+800
+22% +$28K ﹤0.01% 4998
2017
Q1
$132K Sell
3,700
-1,770
-32% -$62.7K ﹤0.01% 4993
2016
Q4
$178K Buy
5,470
+100
+2% +$3.32K ﹤0.01% 5370
2016
Q3
$202K Sell
5,370
-321,000
-98% -$12.4M ﹤0.01% 4638
2016
Q2
$13M Sell
326,370
-373,100
-53% -$13.6M 0.01% 870
2016
Q1
$23.7M Buy
699,470
+281,900
+68% +$8.1M 0.03% 530
2015
Q4
$11.3M Buy
417,570
+397,600
+1,991% +$11.7M 0.01% 1075
2015
Q3
$619K Buy
19,970
+400
+2% +$11.9K ﹤0.01% 3531
2015
Q2
$607K Buy
19,570
+13,970
+249% +$489K ﹤0.01% 3532
2015
Q1
$204K Sell
5,600
-27,400
-83% -$1.06M ﹤0.01% 4510
2014
Q4
$1.28M Hold
33,000
﹤0.01% 2885
2014
Q3
$1.08M Buy
+33,000
New +$1.07M ﹤0.01% 2974
2014
Q2
Sell
-12,227
Closed -$312K 7219
2014
Q1
$312K Sell
12,227
-386,815
-97% -$9.89M ﹤0.01% 3922
2013
Q4
$11.2M Buy
399,042
+366,257
+1,117% +$9.38M 0.01% 1157
2013
Q3
$819K Sell
32,785
-62,864
-66% -$1.6M ﹤0.01% 3050
2013
Q2
$2.35M Buy
+95,649
New +$3.09M ﹤0.01% 2261

Other funds holding IRM

Citigroup's IRM Position: Q1 2026 in Review

Citigroup reduced its Iron Mountain (IRM) stake by 0.93% in Q1 2026, selling an estimated $295K and leaving 315,634 shares worth $32.2M. The position accounts for 0.01% of the portfolio, ranked #830.

Citigroup first reported a position in IRM in Q2 2013 and has held it in 52 quarters since. The position peaked at $42.8M in Q3 2025. 1,082 funds tracked by Wall St. Rank hold IRM as of Q1 2026.

  • Citigroup held 315,634 shares of Iron Mountain worth $32.2M as of Q1 2026.
  • Citigroup sold 2,967 Iron Mountain shares in Q1 2026, an estimated $295K.
  • Iron Mountain made up 0.01% of Citigroup's portfolio in Q1 2026, its #830 holding.
  • Citigroup first reported a position in Iron Mountain in Q2 2013 and has held it in 52 quarters since.
  • Citigroup's Iron Mountain position peaked at $42.8M in Q3 2025.
  • 1,082 funds tracked by Wall St. Rank held Iron Mountain as of Q1 2026.

Based on Citigroup's 13F filing for Q1 2026, filed 11 May 2026.