DOSSIER · 13F Holders · Q3 2026

ROUNDHILL ETF TRUST

6 institutions still hold ROUNDHILL ETF TRUST as of Q3 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 77926X900·6 13F holders·last filed Sep 30, 2026
Market cap
—
13F value held
$633M
visible holders
Holders
6
filers reporting
Concentration
45.35%
GROUP ONE TRADING LLC #1
top holder share
AI Holders Summary · Q3 2026

6 institutions reported ROUNDHILL ETF TRUST in Q3 2026. GROUP ONE TRADING LLC leads at 45.4% 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
$287M4.8M0.39%Q3 2026
02
IMC-Chicago, LLC
CIK 0001452861· Market maker
$250M4.1M0.05%Q3 2026
03
JPMORGAN CHASE & CO
CIK 0000019617
$60M971K0.00%Q3 2026
04
HRT FINANCIAL LP
CIK 0001475597
$35M586K0.06%Q3 2026
05
Marathon Trading Investment Management LLC
CIK 0001572748
$1M22K0.04%Q3 2026
06
CONCOURSE FINANCIAL GROUP SECURITIES, INC.
CIK 0000752798
$00—Q2 2025