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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
2022
Q1 		– Sell
-16,900
Closed -$698K – 3453
2021
Q4 		$698K Buy
+16,900
New +$683K ﹤0.01% 2906
2020
Q2 		– Sell
-9,300
Closed -$208K – 3219
2020
Q1 		$208K Buy
+9,300
New +$241K ﹤0.01% 2629

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. 479 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.
  • 479 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.