IMC Chicago
IRDM icon

IMC Chicago’s Iridium Communications IRDM Stock Holding History

IMC Chicago’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 		$19.4M Buy
+354,368
New +$15.1M ﹤0.01% 1079
2026
Q1 		– Sell
-63,051
Closed -$1.42M – 5845
2025
Q4 		$1.1M Buy
63,051
+37,742
+149% +$667K ﹤0.01% 2900
2025
Q3 		$442K Buy
+25,309
New +$625K ﹤0.01% 3243

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

IMC Chicago's IRDM Position: Q2 2026 in Review

IMC Chicago opened a new position in Iridium Communications (IRDM) in Q2 2026: 354,368 shares worth $19.4M. The stake represents ﹤0.01% of the portfolio and ranks #1079 among its holdings. This is a return to the name: IMC Chicago previously reported a position in IRDM as recently as Q4 2025.

IMC Chicago first reported a position in IRDM in Q3 2025 and has held it in 3 quarters since. 483 funds tracked by Wall St. Rank hold IRDM as of Q2 2026.

  • IMC Chicago held 354,368 shares of Iridium Communications worth $19.4M as of Q2 2026.
  • Iridium Communications was a new IMC Chicago position in Q2 2026.
  • Iridium Communications made up ﹤0.01% of IMC Chicago's portfolio in Q2 2026, its #1079 holding.
  • IMC Chicago first reported a position in Iridium Communications in Q3 2025 and has held it in 3 quarters since.
  • 483 funds tracked by Wall St. Rank held Iridium Communications as of Q2 2026.

Based on IMC Chicago's 13F filing for Q2 2026, filed 6 Aug 2026.