DOSSIER · 13F Holders · Q3 2026

FRONTIER GROUP HLDGS INC

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

CUSIP 35909R958·4 13F holders·last filed Sep 30, 2026
Market cap
—
13F value held
$750K
visible holders
Holders
4
filers reporting
Concentration
45.06%
IMC-Chicago, LLC #1
top holder share
AI Holders Summary · Q3 2026

4 institutions reported FRONTIER GROUP HLDGS INC in Q3 2026. IMC-Chicago, LLC leads at 45.1% 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
$338K57K0.00%Q3 2026
02
GROUP ONE TRADING LLC
CIK 0000932540
$256K43K0.00%Q3 2026
03
SIMPLEX TRADING, LLC
CIK 0001488542
$156K26K0.00%Q3 2026
04
CONCOURSE FINANCIAL GROUP SECURITIES, INC.
CIK 0000752798
$00—Q2 2025