Marshall Wace
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Marshall Wace’s Iridium Communications IRDM Stock Holding History

Marshall Wace’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 		– Sell
-24,896
Closed -$691K – 3438
2026
Q1 		$691K Sell
24,896
-123,940
-83% -$2.79M ﹤0.01% 2310
2025
Q4 		$2.59M Buy
148,836
+87,358
+142% +$1.54M ﹤0.01% 1452
2025
Q3 		$1.07M Buy
61,478
+33,827
+122% +$836K ﹤0.01% 1909
2025
Q2 		$834K Sell
27,651
-167,603
-86% -$4.36M ﹤0.01% 1926
2025
Q1 		$5.33M Buy
195,254
+182,678
+1,453% +$5.35M 0.01% 1032
2024
Q4 		$365K Buy
12,576
+2,565
+26% +$76.3K ﹤0.01% 2168
2024
Q3 		$305K Buy
10,011
+1,820
+22% +$49.6K ﹤0.01% 2136
2024
Q2 		$218K Buy
+8,191
New +$231K ﹤0.01% 2271
2024
Q1 		– Sell
-41,700
Closed -$1.72M – 2620
2023
Q4 		$1.72M Sell
41,700
-87,826
-68% -$3.48M ﹤0.01% 1285
2023
Q3 		$5.89M Buy
129,526
+108,326
+511% +$5.61M 0.01% 811
2023
Q2 		$1.32M Buy
+21,200
New +$1.31M ﹤0.01% 1609
2023
Q1 		– Sell
-7,524
Closed -$387K – 2878
2022
Q4 		$387K Buy
+7,524
New +$378K ﹤0.01% 2472
2022
Q2 		– Sell
-234,018
Closed -$9.43M – 3641
2022
Q1 		$9.43M Buy
234,018
+232,086
+12,013% +$8.74M 0.02% 920
2021
Q4 		$80K Sell
1,932
-86,880
-98% -$3.51M ﹤0.01% 3439
2021
Q3 		$3.54M Buy
+88,812
New +$3.73M 0.01% 1168
2017
Q1 		– Sell
-11,626
Closed -$112K – 523
2016
Q4 		$112K Sell
11,626
-48,145
-81% -$430K ﹤0.01% 938
2016
Q3 		$485K Buy
+59,771
New +$501K ﹤0.01% 803

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

Marshall Wace's IRDM Position: Q2 2026 in Review

Marshall Wace sold out of Iridium Communications (IRDM) in Q2 2026, closing a stake of 24,896 shares — an estimated $691K sold.

Marshall Wace first reported a position in IRDM in Q3 2016 and held it in 17 quarters. The position peaked at $9.43M in Q1 2022. 482 funds tracked by Wall St. Rank hold IRDM as of Q2 2026.

  • Marshall Wace reported no remaining Iridium Communications position as of Q2 2026 after selling out during the quarter.
  • Marshall Wace sold 24,896 Iridium Communications shares in Q2 2026, an estimated $691K.
  • Marshall Wace first reported a position in Iridium Communications in Q3 2016 and held it in 17 quarters.
  • Marshall Wace's Iridium Communications position peaked at $9.43M in Q1 2022.
  • 482 funds tracked by Wall St. Rank held Iridium Communications as of Q2 2026.

Based on Marshall Wace's 13F filing for Q2 2026, filed 13 Aug 2026.