Simplex Trading
IRDM icon

Simplex Trading’s Iridium Communications IRDM Stock Holding History

Simplex Trading’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
Q1 		$735K Sell
26,500
-2,500
-9% -$56.3K ﹤0.01% 2826
2025
Q4 		$504K Sell
29,000
-900
-3% -$15.9K ﹤0.01% 3294
2025
Q3 		$522K Buy
29,900
+5,800
+24% +$143K ﹤0.01% 3771
2025
Q2 		$727K Sell
24,100
-5,500
-19% -$143K ﹤0.01% 3129
2025
Q1 		$808K Buy
29,600
+2,400
+9% +$70.3K ﹤0.01% 2911
2024
Q4 		$789K Buy
27,200
+16,300
+150% +$485K ﹤0.01% 3087
2024
Q3 		$331K Sell
10,900
-24,600
-69% -$670K ﹤0.01% 4030
2024
Q2 		$945K Buy
35,500
+20,000
+129% +$563K ﹤0.01% 2970
2024
Q1 		$405K Sell
15,500
-4,300
-22% -$140K ﹤0.01% 4058
2023
Q4 		$814K Buy
19,800
+12,700
+179% +$503K ﹤0.01% 3204
2023
Q3 		$322K Sell
7,100
-33,200
-82% -$1.72M ﹤0.01% 3862
2023
Q2 		$2.5M Buy
40,300
+8,900
+28% +$551K ﹤0.01% 1797
2023
Q1 		$1.94M Buy
31,400
+24,900
+383% +$1.49M ﹤0.01% 1971
2022
Q4 		$334K Buy
6,500
+2,900
+81% +$146K ﹤0.01% 3614
2022
Q3 		$159K Sell
3,600
-900
-20% -$39K ﹤0.01% 4921
2022
Q2 		$169K Buy
4,500
+2,800
+165% +$104K ﹤0.01% 4832
2022
Q1 		$68K Sell
1,700
-800
-32% -$30.1K ﹤0.01% 6689
2021
Q4 		$103K Sell
2,500
-15,200
-86% -$614K ﹤0.01% 6205
2021
Q3 		$715K Hold
17,700
– – ﹤0.01% 3565
2021
Q2 		$707K Buy
17,700
+17,430
+6,456% +$677K ﹤0.01% 3636
2021
Q1 		$1.11M Buy
270
+206
+322% +$9.02K ﹤0.01% 2271
2020
Q4 		$251K Sell
64
-48
-43% -$1.51K ﹤0.01% 4305
2020
Q3 		$286K Sell
112
-97
-46% -$2.67K ﹤0.01% 3650
2020
Q2 		$531K Sell
209
-1,666
-89% -$39.1K ﹤0.01% 2824
2020
Q1 		$4.19M Buy
1,875
+1,763
+1,574% +$45.6K 0.01% 792
2019
Q4 		$275K Buy
112
+14
+14% +$335 ﹤0.01% 3401
2019
Q3 		$208K Sell
98
-90
-48% -$2.15K ﹤0.01% 3522
2019
Q2 		$437K Sell
188
-460
-71% -$11.4K ﹤0.01% 2694
2019
Q1 		$1.71M Buy
648
+473
+270% +$10.2K ﹤0.01% 1517
2018
Q4 		$322K Sell
175
-292
-63% -$5.99K ﹤0.01% 2646
2018
Q3 		$1.05M Buy
467
+324
+227% +$6.29K ﹤0.01% 1835
2018
Q2 		$230K Buy
143
+41
+40% +$558 ﹤0.01% 3317
2018
Q1 		$3K Sell
102
-107
-51% -$1.28K ﹤0.01% 4996
2017
Q4 		$25K Buy
209
+42
+25% +$485 ﹤0.01% 3095
2017
Q3 		$16K Sell
167
-67
-29% -$695 ﹤0.01% 3362
2017
Q2 		$15K Buy
234
+41
+21% +$428 ﹤0.01% 3575
2017
Q1 		$1K Buy
193
+126
+188% +$1.2K ﹤0.01% 5678
2016
Q4 		$2K Sell
67
-283
-81% -$2.52K ﹤0.01% 5050
2016
Q3 		$8K Buy
+350
New +$2.94K ﹤0.01% 3819

Other funds holding IRDM

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
SHCM
Silver Heights Capital Management Toronto, Ontario, Canada $260M AUM 6.93% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
American Century Companies
American Century Companies Kansas City, Missouri $194B AUM 35% 1-Year Est. Return
GAM
Gotham Asset Management New York $32.7B AUM 27.65% 1-Year Est. Return
AQR Capital Management
AQR Capital Management Greenwich, Connecticut $218B AUM 29.41% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

Simplex Trading's IRDM Position: Q1 2026 in Review

Simplex Trading reduced its Iridium Communications (IRDM) stake by 65% in Q1 2026, selling an estimated $128K and leaving 3,097 shares worth $85.9K. The position accounts for ﹤0.01% of the portfolio, ranked #5272.

Simplex Trading first reported a position in IRDM in Q1 2015 and has held it in 21 quarters since. The position peaked at $751K in Q2 2023. 379 funds tracked by Wall St. Rank hold IRDM as of Q1 2026.

  • Simplex Trading held 3,097 shares of Iridium Communications worth $85.9K as of Q1 2026.
  • Simplex Trading sold 5,690 Iridium Communications shares in Q1 2026, an estimated $128K.
  • Iridium Communications made up ﹤0.01% of Simplex Trading's portfolio in Q1 2026, its #5272 holding.
  • Simplex Trading first reported a position in Iridium Communications in Q1 2015 and has held it in 21 quarters since.
  • Simplex Trading's Iridium Communications position peaked at $751K in Q2 2023.
  • 379 funds tracked by Wall St. Rank held Iridium Communications as of Q1 2026.

Based on Simplex Trading's 13F filing for Q1 2026, filed 14 May 2026.