DOSSIER · 13F Holders · Q2 2026

FLAGSTAR FINANCIAL INC

4 institutions still hold FLAGSTAR FINANCIAL INC as of Q2 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 649445950·4 13F holders·last filed Jun 30, 2026
Market cap
13F value held
$56M
visible holders
Holders
4
filers reporting
Concentration
77.46%
GROUP ONE TRADING LLC #1
top holder share
AI Holders Summary · Q2 2026

4 institutions reported FLAGSTAR FINANCIAL INC in Q2 2026. GROUP ONE TRADING LLC leads at 77.5% of the visible book.

Top holders

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

#HolderValueShares% port.Quarter
01
GROUP ONE TRADING LLC
CIK 0000932540
$44M2.9M0.06%Q2 2026
02
IMC-Chicago, LLC
CIK 0001452861· Market maker
$6M430K0.00%Q2 2026
03
SIMPLEX TRADING, LLC
CIK 0001488542
$6M422K0.00%Q2 2026
04
CONCOURSE FINANCIAL GROUP SECURITIES, INC.
CIK 0000752798
$00Q2 2025