DOSSIER · 13F Holders · Q3 2026

IRIDIUM COMMUNICATIONS INC

4 institutions still hold IRIDIUM COMMUNICATIONS INC as of Q3 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 46269C902·4 13F holders·last filed Sep 30, 2026
Market cap
—
13F value held
$6M
visible holders
Holders
4
filers reporting
Concentration
52.41%
IMC-Chicago, LLC #1
top holder share
AI Holders Summary · Q3 2026

4 institutions reported IRIDIUM COMMUNICATIONS INC in Q3 2026. IMC-Chicago, LLC leads at 52.4% of the visible book.

Top holders

Sorted by position value. Source: SEC EDGAR 13F-HR filings.

#HolderValueShares% port.Quarter
01
IMC-Chicago, LLC
CIK 0001452861· Market maker
$3M61K0.00%Q3 2026
02
GROUP ONE TRADING LLC
CIK 0000932540
$2M40K0.00%Q3 2026
03
SIMPLEX TRADING, LLC
CIK 0001488542
$757K16K0.00%Q3 2026
04
CONCOURSE FINANCIAL GROUP SECURITIES, INC.
CIK 0000752798
$00—Q2 2025