DOSSIER · 13F Holders · Q4 2025
MSTW

ROUNDHILL ETF TRUST

5 institutions still hold ROUNDHILL ETF TRUST as of Q4 2025. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 77926X593·5 13F holders·last filed Dec 31, 2025
Market cap
13F value held
$262K
visible holders
Holders
5
filers reporting
Concentration
74.22%
CITADEL ADVISORS LLC #1
top holder share
AI Holders Summary · Q4 2025

5 institutions reported MSTW in Q4 2025. CITADEL ADVISORS LLC leads at 74.2% of the visible book.

Top holders

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

#HolderValueShares% port.Quarter
01
CITADEL ADVISORS LLC
CIK 0001423053
$194K20K0.00%Q4 2025
02
OLD MISSION CAPITAL LLC
CIK 0001455915
$45K14K0.00%Q2 2026
03
GROUP ONE TRADING LLC
CIK 0000932540
$17K5K0.00%Q2 2026
04
SIMPLEX TRADING, LLC
CIK 0001488542
$4K1K0.00%Q2 2026
05
UBS Group AG
CIK 0001610520
$9893120.00%Q2 2026