DOSSIER · 13F Holders · Q3 2026

GFL ENVIRONMENTAL INC

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

CUSIP 36168Q904·7 13F holders·last filed Sep 30, 2026
Market cap
—
13F value held
$57M
visible holders
Holders
7
filers reporting
Concentration
46.80%
IMC-Chicago, LLC #1
top holder share
AI Holders Summary · Q3 2026

7 institutions reported GFL ENVIRONMENTAL INC in Q3 2026. IMC-Chicago, LLC leads at 46.8% 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
$27M636K0.01%Q3 2026
02
GROUP ONE TRADING LLC
CIK 0000932540
$19M443K0.03%Q3 2026
03
SIMPLEX TRADING, LLC
CIK 0001488542
$9M217K0.00%Q3 2026
04
Marathon Trading Investment Management LLC
CIK 0001572748
$2M40K0.05%Q3 2026
05
Maven Securities LTD
CIK 0001633046
$753K18K0.01%Q3 2026
06
BOUSSARD & GAVAUDAN GESTION SAS
CIK 0001569001
$224K1K0.02%Q3 2026
07
CONCOURSE FINANCIAL GROUP SECURITIES, INC.
CIK 0000752798
$00—Q2 2025