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 77926X902·3 13F holders·last filed Sep 30, 2026
Market cap
—
13F value held
$178M
visible holders
Holders
3
filers reporting
Concentration
100.00%
SIMPLEX TRADING, LLC #1
top holder share
AI Holders Summary · Q3 2026

3 institutions reported ROUNDHILL ETF TRUST in Q3 2026. SIMPLEX TRADING, LLC leads at 100.0% 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
$178M3.0M0.10%Q3 2026
02
GROUP ONE TRADING LLC
CIK 0000932540
$7K3000.00%Q3 2026
03
CONCOURSE FINANCIAL GROUP SECURITIES, INC.
CIK 0000752798
$00—Q2 2025