DOSSIER · 13F Holders · Q2 2026

ROUNDHILL ETF TRUST

5 institutions still hold ROUNDHILL ETF TRUST as of Q2 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 77926X900·5 13F holders·last filed Jun 30, 2026
Market cap
13F value held
$603M
visible holders
Holders
5
filers reporting
Concentration
45.04%
GROUP ONE TRADING LLC #1
top holder share
AI Holders Summary · Q2 2026

5 institutions reported ROUNDHILL ETF TRUST in Q2 2026. GROUP ONE TRADING LLC leads at 45.0% 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
$272M3.7M0.38%Q2 2026
02
IMC-Chicago, LLC
CIK 0001452861· Market maker
$265M3.6M0.06%Q2 2026
03
JPMORGAN CHASE & CO
CIK 0000019617
$66M915K0.00%Q2 2026
04
Marathon Trading Investment Management LLC
CIK 0001572748
$665K9K0.02%Q2 2026
05
CONCOURSE FINANCIAL GROUP SECURITIES, INC.
CIK 0000752798
$00Q2 2025