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John Overdeck’s Iridium Communications IRDM Stock Holding History

John Overdeck’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 		$19.9M Sell
363,685
-38,743
-10% -$1.66M 0.01% 1057
2026
Q1 		$11.2M Sell
402,428
-298,116
-43% -$6.71M 0.01% 1335
2025
Q4 		$12.2M Sell
700,544
-39,046
-5% -$690K 0.02% 996
2025
Q3 		$12.9M Buy
739,590
+567,971
+331% +$14M 0.02% 824
2025
Q2 		$5.18M Buy
171,619
+110,182
+179% +$2.87M 0.01% 1211
2025
Q1 		$1.68M Buy
+61,437
New +$1.8M ﹤0.01% 1857
2024
Q3 		– Sell
-8,222
Closed -$219K – 3226
2024
Q2 		$219K Buy
+8,222
New +$231K ﹤0.01% 2705
2023
Q4 		– Sell
-110,963
Closed -$5.05M – 3252
2023
Q3 		$5.05M Buy
110,963
+96,463
+665% +$5M 0.01% 905
2023
Q2 		$901K Buy
14,500
+1,800
+14% +$111K ﹤0.01% 1996
2023
Q1 		$787K Sell
12,700
-119,965
-90% -$7.18M ﹤0.01% 1996
2022
Q4 		$6.82M Sell
132,665
-1,478
-1% -$74.2K 0.02% 711
2022
Q3 		$5.95M Buy
134,143
+74,573
+125% +$3.23M 0.02% 690
2022
Q2 		$2.24M Sell
59,570
-139,263
-70% -$5.19M 0.01% 1137
2022
Q1 		$8.02M Buy
198,833
+193,443
+3,589% +$7.28M 0.02% 695
2021
Q4 		$223K Sell
5,390
-3,930
-42% -$159K ﹤0.01% 3846
2021
Q3 		$371K Buy
+9,320
New +$391K ﹤0.01% 3503
2020
Q4 		– Sell
-16,775
Closed -$429K – 3535
2020
Q3 		$429K Buy
+16,775
New +$462K ﹤0.01% 2355
2018
Q1 		– Sell
-161,077
Closed -$1.9M – 3326
2017
Q4 		$1.9M Buy
+161,077
New +$1.86M 0.01% 1510
2017
Q3 		– Sell
-230,532
Closed -$2.55M – 2962
2017
Q2 		$2.55M Buy
230,532
+142,183
+161% +$1.49M 0.01% 1253
2017
Q1 		$853K Buy
88,349
+32,432
+58% +$309K ﹤0.01% 2020
2016
Q4 		$537K Buy
+55,917
New +$499K ﹤0.01% 2470
2014
Q1 		– Sell
-89,217
Closed -$559K – 2119
2013
Q4 		$559K Buy
+89,217
New +$539K ﹤0.01% 1617

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

John Overdeck's IRDM Position: Q2 2026 in Review

John Overdeck reduced its Iridium Communications (IRDM) stake by 9.6% in Q2 2026, selling an estimated $1.66M and leaving 363,685 shares worth $19.9M. The position accounts for 0.01% of the portfolio, ranked #1057.

John Overdeck first reported a position in IRDM in Q4 2013 and has held it in 22 quarters since. 478 funds tracked by Wall St. Rank hold IRDM as of Q2 2026.

  • John Overdeck held 363,685 shares of Iridium Communications worth $19.9M as of Q2 2026.
  • John Overdeck sold 38,743 Iridium Communications shares in Q2 2026, an estimated $1.66M.
  • Iridium Communications made up 0.01% of John Overdeck's portfolio in Q2 2026, its #1057 holding.
  • John Overdeck first reported a position in Iridium Communications in Q4 2013 and has held it in 22 quarters since.
  • 478 funds tracked by Wall St. Rank held Iridium Communications as of Q2 2026.

Based on Two Sigma Investments's 13F filing for Q2 2026, filed 14 Aug 2026.