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 		$965K Sell
34,800
-44,700
-56% -$1.01M ﹤0.01% 2532
2025
Q4 		$1.38M Buy
79,500
+56,200
+241% +$993K ﹤0.01% 2297
2025
Q3 		$406K Sell
23,300
-5,000
-18% -$124K ﹤0.01% 4085
2025
Q2 		$853K Sell
28,300
-29,300
-51% -$762K ﹤0.01% 2934
2025
Q1 		$1.57M Buy
57,600
+34,800
+153% +$1.02M ﹤0.01% 2258
2024
Q4 		$661K Buy
22,800
+1,300
+6% +$38.7K ﹤0.01% 3260
2024
Q3 		$654K Sell
21,500
-5,600
-21% -$153K ﹤0.01% 3307
2024
Q2 		$721K Sell
27,100
-17,500
-39% -$493K ﹤0.01% 3260
2024
Q1 		$1.17M Buy
44,600
+12,300
+38% +$400K ﹤0.01% 2954
2023
Q4 		$1.33M Buy
32,300
+21,200
+191% +$839K ﹤0.01% 2741
2023
Q3 		$504K Sell
11,100
-3,200
-22% -$166K ﹤0.01% 3389
2023
Q2 		$888K Sell
14,300
-31,700
-69% -$1.96M ﹤0.01% 2715
2023
Q1 		$2.85M Buy
46,000
+32,800
+248% +$1.96M ﹤0.01% 1661
2022
Q4 		$678K Sell
13,200
-11,400
-46% -$572K ﹤0.01% 2867
2022
Q3 		$1.09M Buy
24,600
+11,600
+89% +$503K ﹤0.01% 2552
2022
Q2 		$488K Buy
13,000
+2,600
+25% +$97K ﹤0.01% 3473
2022
Q1 		$419K Sell
10,400
-8,100
-44% -$305K ﹤0.01% 4070
2021
Q4 		$763K Sell
18,500
-21,000
-53% -$848K ﹤0.01% 3242
2021
Q3 		$1.6M Buy
39,500
+100
+0.3% +$4.2K ﹤0.01% 2460
2021
Q2 		$1.57M Buy
39,400
+38,860
+7,196% +$1.51M ﹤0.01% 2497
2021
Q1 		$2.23M Buy
540
+384
+246% +$16.8K ﹤0.01% 1495
2020
Q4 		$613K Buy
156
+107
+218% +$3.36K ﹤0.01% 3165
2020
Q3 		$125K Sell
49
-65
-57% -$1.79K ﹤0.01% 4651
2020
Q2 		$290K Sell
114
-4
-3% -$94 ﹤0.01% 3563
2020
Q1 		$263K Buy
118
+11
+10% +$285 ﹤0.01% 3271
2019
Q4 		$263K Sell
107
-55
-34% -$1.32K ﹤0.01% 3455
2019
Q3 		$344K Buy
162
+30
+23% +$715 ﹤0.01% 3027
2019
Q2 		$307K Sell
132
-167
-56% -$4.16K ﹤0.01% 3052
2019
Q1 		$790K Sell
299
-433
-59% -$9.32K ﹤0.01% 2191
2018
Q4 		$1.35M Buy
732
+471
+180% +$9.67K ﹤0.01% 1387
2018
Q3 		$587K Buy
261
+61
+31% +$1.19K ﹤0.01% 2463
2018
Q2 		$322K Buy
200
+147
+277% +$2K ﹤0.01% 2933
2018
Q1 		$3K Sell
53
-2
-4% -$24 ﹤0.01% 4995
2017
Q4 		$3K Sell
55
-121
-69% -$1.4K ﹤0.01% 4906
2017
Q3 		$7K Sell
176
-89
-34% -$923 ﹤0.01% 4099
2017
Q2 		$9K Buy
265
+25
+10% +$261 ﹤0.01% 4063
2017
Q1 		$6K Buy
+240
New +$2.29K ﹤0.01% 4429
2016
Q4 		– Sell
-246
Closed -$25K – 6155
2016
Q3 		$25K Buy
246
+173
+237% +$1.45K ﹤0.01% 2744
2016
Q2 		$8K Sell
73
-2
-3% -$16 ﹤0.01% 3801
2016
Q1 		$7K Buy
+75
New +$539 ﹤0.01% 3800
2015
Q1 		– Sell
-106
Closed -$43K – 5227
2014
Q4 		$43K Buy
+106
New +$992 0.01% 1476

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.