Cambridge Investment Research Advisors
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Cambridge Investment Research Advisors’s Iridium Communications IRDM Stock Holding History

Cambridge Investment Research Advisors’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 		$489K Sell
8,911
-9,131
-51% -$390K ﹤0.01% 2976
2026
Q1 		$500K Buy
+18,042
New +$406K ﹤0.01% 2806
2025
Q3 		– Sell
-11,167
Closed -$337K – 3787
2025
Q2 		$337K Buy
11,167
+2,136
+24% +$55.5K ﹤0.01% 2879
2025
Q1 		$247K Buy
+9,031
New +$265K ﹤0.01% 3037
2024
Q1 		– Sell
-7,030
Closed -$289K – 3361
2023
Q4 		$289K Sell
7,030
-189
-3% -$7.48K ﹤0.01% 2621
2023
Q3 		$328K Sell
7,219
-1,281
-15% -$66.3K ﹤0.01% 2431
2023
Q2 		$528K Sell
8,500
-545
-6% -$33.7K ﹤0.01% 2097
2023
Q1 		$560K Sell
9,045
-634
-7% -$37.9K ﹤0.01% 2009
2022
Q4 		$498K Buy
9,679
+1,343
+16% +$67.4K ﹤0.01% 2015
2022
Q3 		$370K Buy
8,336
+159
+2% +$6.89K ﹤0.01% 2195
2022
Q2 		$307K Sell
8,177
-1,004
-11% -$37.4K ﹤0.01% 2365
2022
Q1 		$370K Sell
9,181
-813
-8% -$30.6K ﹤0.01% 2367
2021
Q4 		$413K Sell
9,994
-3,087
-24% -$125K ﹤0.01% 2268
2021
Q3 		$521K Buy
13,081
+6,755
+107% +$284K ﹤0.01% 2022
2021
Q2 		$253K Sell
6,326
-74
-1% -$2.88K ﹤0.01% 2601
2021
Q1 		$264K Sell
6,400
-650
-9% -$28.5K ﹤0.01% 2377
2020
Q4 		$277K Buy
+7,050
New +$222K ﹤0.01% 2211
2020
Q1 		– Sell
-9,248
Closed -$228K – 2383
2019
Q4 		$228K Sell
9,248
-3,773
-29% -$90.4K ﹤0.01% 2116
2019
Q3 		$277K Sell
13,021
-7,055
-35% -$168K ﹤0.01% 1888
2019
Q2 		$467K Buy
20,076
+9,413
+88% +$234K ﹤0.01% 1465
2019
Q1 		$282K Buy
+10,663
New +$229K ﹤0.01% 1853
2018
Q4 		– Sell
-9,726
Closed -$219K – 2219
2018
Q3 		$219K Buy
+9,726
New +$189K ﹤0.01% 1998

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 $3.38T AUM 44.17% 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

Cambridge Investment Research Advisors's IRDM Position: Q2 2026 in Review

Cambridge Investment Research Advisors reduced its Iridium Communications (IRDM) stake by 51% in Q2 2026, selling an estimated $390K and leaving 8,911 shares worth $489K. The position accounts for ﹤0.01% of the portfolio, ranked #2976.

Cambridge Investment Research Advisors first reported a position in IRDM in Q3 2018 and has held it in 22 quarters since. The position peaked at $560K in Q1 2023. 484 funds tracked by Wall St. Rank hold IRDM as of Q2 2026.

  • Cambridge Investment Research Advisors held 8,911 shares of Iridium Communications worth $489K as of Q2 2026.
  • Cambridge Investment Research Advisors sold 9,131 Iridium Communications shares in Q2 2026, an estimated $390K.
  • Iridium Communications made up ﹤0.01% of Cambridge Investment Research Advisors's portfolio in Q2 2026, its #2976 holding.
  • Cambridge Investment Research Advisors first reported a position in Iridium Communications in Q3 2018 and has held it in 22 quarters since.
  • Cambridge Investment Research Advisors's Iridium Communications position peaked at $560K in Q1 2023.
  • 484 funds tracked by Wall St. Rank held Iridium Communications as of Q2 2026.

Based on Cambridge Investment Research Advisors's 13F filing for Q2 2026, filed 27 Jul 2026.