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
Q3 		$2.92M Sell
61,000
-26,500
-30% -$1.28M ﹤0.01% 2770
2026
Q2 		$4.8M Buy
87,500
+10,900
+14% +$466K ﹤0.01% 2131
2026
Q1 		$2.12M Buy
76,600
+20,800
+37% +$468K ﹤0.01% 2508
2025
Q4 		$970K Sell
55,800
-10,200
-15% -$180K ﹤0.01% 2998
2025
Q3 		$1.15M Buy
66,000
+49,100
+291% +$1.21M ﹤0.01% 2612
2025
Q2 		$510K Buy
+16,900
New +$439K ﹤0.01% 2853

Other funds holding IRDM

Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.92T AUM 36.1% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $551B AUM 33.95% 1-Year Est. Return
Bank of New York Mellon
Bank of New York Mellon New York $608B AUM 32.77% 1-Year Est. Return
Principal Financial Group
Principal Financial Group Des Moines, Iowa $195B AUM 21.17% 1-Year Est. Return
NXG Investment Management
NXG Investment Management Dallas, Texas $2.18B AUM 31.25% 1-Year Est. Return
Pinnacle Associates
Pinnacle Associates New York $8.92B AUM 43.91% 1-Year Est. Return
Mitsubishi UFJ Asset Management
Mitsubishi UFJ Asset Management Tokyo, Japan $194B AUM 32.2% 1-Year Est. Return
Braun Stacey Associates
Braun Stacey Associates New York $3.48B AUM 48.73% 1-Year Est. Return
Russell Investments Group
Russell Investments Group London, United Kingdom $114B AUM 33.83% 1-Year Est. Return
Citigroup
Citigroup New York $308B AUM 40.94% 1-Year Est. Return

IMC Chicago's IRDM Position: Q3 2026 in Review

IMC Chicago reduced its Iridium Communications (IRDM) stake by 62% in Q3 2026, selling an estimated $10.6M and leaving 135,246 shares worth $6.48M. The position accounts for ﹤0.01% of the portfolio, ranked #2003.

IMC Chicago first reported a position in IRDM in Q3 2025 and has held it in 4 quarters since. The position peaked at $19.4M in Q2 2026. 192 funds tracked by Wall St. Rank hold IRDM as of Q3 2026.

  • IMC Chicago held 135,246 shares of Iridium Communications worth $6.48M as of Q3 2026.
  • IMC Chicago sold 219,122 Iridium Communications shares in Q3 2026, an estimated $10.6M.
  • Iridium Communications made up ﹤0.01% of IMC Chicago's portfolio in Q3 2026, its #2003 holding.
  • IMC Chicago first reported a position in Iridium Communications in Q3 2025 and has held it in 4 quarters since.
  • IMC Chicago's Iridium Communications position peaked at $19.4M in Q2 2026.
  • 192 funds tracked by Wall St. Rank held Iridium Communications as of Q3 2026.

Based on IMC Chicago's 13F filing for Q3 2026, filed 5 Nov 2026.