DOSSIER · 13F Holders · Q3 2026

ROUNDHILL ETF TRUST

3 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 77926X906·3 13F holders·last filed Sep 30, 2026
Market cap
—
13F value held
$1M
visible holders
Holders
3
filers reporting
Concentration
98.06%
GROUP ONE TRADING LLC #1
top holder share
AI Holders Summary · Q3 2026

3 institutions reported ROUNDHILL ETF TRUST in Q3 2026. GROUP ONE TRADING LLC leads at 98.1% 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
$1M49K0.00%Q3 2026
02
Marathon Trading Investment Management LLC
CIK 0001572748
$24K1K0.00%Q3 2026
03
CONCOURSE FINANCIAL GROUP SECURITIES, INC.
CIK 0000752798
$00—Q2 2025