DOSSIER · 13F Holders · Q3 2026

FIRSTENERGY CORP

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

CUSIP 337932907·4 13F holders·last filed Sep 30, 2026
Market cap
—
13F value held
$18M
visible holders
Holders
4
filers reporting
Concentration
36.00%
SIMPLEX TRADING, LLC #1
top holder share
AI Holders Summary · Q3 2026

4 institutions reported FIRSTENERGY CORP in Q3 2026. SIMPLEX TRADING, LLC leads at 36.0% of the visible book.

Top holders

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

#HolderValueShares% port.Quarter
01
SIMPLEX TRADING, LLC
CIK 0001488542
$6M149K0.00%Q3 2026
02
GROUP ONE TRADING LLC
CIK 0000932540
$6M125K0.01%Q2 2026
03
IMC-Chicago, LLC
CIK 0001452861· Market maker
$6M128K0.00%Q3 2026
04
CONCOURSE FINANCIAL GROUP SECURITIES, INC.
CIK 0000752798
$00—Q2 2025