DOSSIER · 13F Holders · Q3 2026
MSTW

ROUNDHILL ETF TRUST

4 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 77926X593·4 13F holders·last filed Sep 30, 2026
Market cap
—
13F value held
$1M
visible holders
Holders
4
filers reporting
Concentration
69.93%
JANE STREET GROUP, LLC #1
top holder share
AI Holders Summary · Q3 2026

4 institutions reported MSTW in Q3 2026. JANE STREET GROUP, LLC leads at 69.9% of the visible book.

Top holders

Sorted by position value. Source: SEC EDGAR 13F-HR filings.

#HolderValueShares% port.Quarter
01
JANE STREET GROUP, LLC
CIK 0001595888· Market maker
$820K167K0.00%Q3 2026
02
HRT FINANCIAL LP
CIK 0001475597
$162K33K0.00%Q3 2026
03
CITADEL ADVISORS LLC
CIK 0001423053
$145K46K0.00%Q2 2026
04
OLD MISSION CAPITAL LLC
CIK 0001455915
$45K14K0.00%Q2 2026