TRCT
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Tower Research Capital (TRC)’s Iridium Communications IRDM Stock Holding History

Tower Research Capital (TRC)’s Portfolio IRDM Stock Details IRDM Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$19K Sell
346
-4,865
-93% -$208K ﹤0.01% 3610
2026
Q1 		$145K Sell
5,211
-13,260
-72% -$299K ﹤0.01% 1884
2025
Q4 		$321K Sell
18,471
-56,452
-75% -$998K 0.01% 1107
2025
Q3 		$1.31M Buy
74,923
+60,832
+432% +$1.5M 0.04% 431
2025
Q2 		$425K Buy
14,091
+7,243
+106% +$188K 0.01% 1123
2025
Q1 		$187K Sell
6,848
-1,517
-18% -$44.5K 0.01% 1412
2024
Q4 		$243K Buy
8,365
+3,949
+89% +$117K ﹤0.01% 1582
2024
Q3 		$134K Sell
4,416
-26,506
-86% -$722K ﹤0.01% 1995
2024
Q2 		$823K Buy
30,922
+18,151
+142% +$511K 0.01% 915
2024
Q1 		$334K Sell
12,771
-2,304
-15% -$74.9K 0.01% 1100
2023
Q4 		$620K Buy
15,075
+3,161
+27% +$125K 0.01% 1198
2023
Q3 		$542K Sell
11,914
-8,489
-42% -$440K 0.02% 829
2023
Q2 		$1.27M Buy
20,403
+14,749
+261% +$912K 0.04% 385
2023
Q1 		$350K Buy
5,654
+2,525
+81% +$151K 0.01% 1044
2022
Q4 		$161K Sell
3,129
-11,841
-79% -$594K 0.01% 1448
2022
Q3 		$664K Buy
14,970
+6,738
+82% +$292K 0.01% 924
2022
Q2 		$309K Buy
8,232
+5,067
+160% +$189K 0.01% 1459
2022
Q1 		$128K Sell
3,165
-783
-20% -$29.5K ﹤0.01% 2030
2021
Q4 		$163K Sell
3,948
-8,442
-68% -$341K ﹤0.01% 1915
2021
Q3 		$494K Buy
12,390
+428
+4% +$18K 0.01% 999
2021
Q2 		$478K Sell
11,962
-42,674
-78% -$1.66M 0.01% 1230
2021
Q1 		$2.25M Buy
54,636
+51,059
+1,427% +$2.23M 0.04% 437
2020
Q4 		$140K Sell
3,577
-80,247
-96% -$2.52M ﹤0.01% 2042
2020
Q3 		$2.14M Buy
83,824
+71,886
+602% +$1.98M 0.02% 349
2020
Q2 		$304K Buy
+11,938
New +$280K 0.01% 1428
2020
Q1 		– Sell
-152
Closed -$4K – 3467
2019
Q4 		$4K Sell
152
-11,867
-99% -$284K ﹤0.01% 2785
2019
Q3 		$256K Buy
12,019
+10,733
+835% +$256K 0.02% 881
2019
Q2 		$30K Buy
1,286
+373
+41% +$9.29K ﹤0.01% 1906
2019
Q1 		$24K Buy
+913
New +$19.6K ﹤0.01% 2165
2018
Q3 		– Sell
-689
Closed -$11K – 4000
2018
Q2 		$11K Buy
+689
New +$9.37K ﹤0.01% 2735
2018
Q1 		– Sell
-6,942
Closed -$82K – 3540
2017
Q4 		$82K Buy
6,942
+3,223
+87% +$37.3K 0.01% 996
2017
Q3 		$38K Buy
3,719
+2,702
+266% +$28K ﹤0.01% 2223
2017
Q2 		$11K Buy
+1,017
New +$10.6K ﹤0.01% 1564
2017
Q1 		– Sell
-9,165
Closed -$88K – 3469
2016
Q4 		$88K Buy
+9,165
New +$81.8K 0.01% 1045
2016
Q2 		– Sell
-220
Closed -$2K – 4687
2016
Q1 		$2K Sell
220
-3,842
-95% -$27.6K ﹤0.01% 3390
2015
Q4 		$34K Buy
4,062
+3,648
+881% +$27.8K 0.01% 776
2015
Q3 		$3K Sell
414
-4,400
-91% -$31.9K ﹤0.01% 3135
2015
Q2 		$44K Buy
+4,814
New +$49.5K ﹤0.01% 1468
2015
Q1 		– Sell
-2,196
Closed -$21K – 4655
2014
Q4 		$21K Buy
2,196
+570
+35% +$5.33K ﹤0.01% 1562
2014
Q3 		$14K Buy
+1,626
New +$14.1K ﹤0.01% 2586
2014
Q2 		– Sell
-628
Closed -$5K – 4326
2014
Q1 		$5K Buy
628
+228
+57% +$1.52K ﹤0.01% 3262
2013
Q4 		$3K Sell
400
-7,297
-95% -$44.1K ﹤0.01% 3846
2013
Q3 		$53K Buy
7,697
+1,815
+31% +$13.6K 0.01% 1861
2013
Q2 		$46K Buy
+5,882
New +$41.3K ﹤0.01% 998

Other funds holding IRDM

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
AQR Capital Management
AQR Capital Management Greenwich, Connecticut $287B AUM 42.33% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
American Century Companies
American Century Companies Kansas City, Missouri $226B AUM 44.75% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
SHCM
Silver Heights Capital Management Toronto, Ontario, Canada $324M AUM 55.4% 1-Year Est. Return
GAM
Gotham Asset Management New York $43B AUM 34.97% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return
VanEck Associates
VanEck Associates New York $164B AUM 112.45% 1-Year Est. Return

Tower Research Capital (TRC)'s IRDM Position: Q2 2026 in Review

Tower Research Capital (TRC) reduced its Iridium Communications (IRDM) stake by 93% in Q2 2026, selling an estimated $208K and leaving 346 shares worth $19K. The position accounts for ﹤0.01% of the portfolio, ranked #3610.

Tower Research Capital (TRC) first reported a position in IRDM in Q2 2013 and has held it in 44 quarters since. The position peaked at $2.25M in Q1 2021. 483 funds tracked by Wall St. Rank hold IRDM as of Q2 2026.

  • Tower Research Capital (TRC) held 346 shares of Iridium Communications worth $19K as of Q2 2026.
  • Tower Research Capital (TRC) sold 4,865 Iridium Communications shares in Q2 2026, an estimated $208K.
  • Iridium Communications made up ﹤0.01% of Tower Research Capital (TRC)'s portfolio in Q2 2026, its #3610 holding.
  • Tower Research Capital (TRC) first reported a position in Iridium Communications in Q2 2013 and has held it in 44 quarters since.
  • Tower Research Capital (TRC)'s Iridium Communications position peaked at $2.25M in Q1 2021.
  • 483 funds tracked by Wall St. Rank held Iridium Communications as of Q2 2026.

Based on Tower Research Capital (TRC)'s 13F filing for Q2 2026, filed 11 Aug 2026.