DOSSIER · 13F Holders · Q2 2026

MORGAN STANLEY

11 institutions still hold MORGAN STANLEY as of Q2 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 617446958·11 13F holders·last filed Jun 30, 2026
Market cap
13F value held
$867M
visible holders
Holders
11
filers reporting
Concentration
45.95%
Optiver Holding B.V. #1
top holder share
AI Holders Summary · Q2 2026

11 institutions reported MORGAN STANLEY in Q2 2026. Optiver Holding B.V. leads at 45.9% of the visible book.

Top holders

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

#HolderValueShares% port.Quarter
01
Optiver Holding B.V.
CIK 0001859606· Market maker
$398M1.9M0.11%Q2 2026
02
IMC-Chicago, LLC
CIK 0001452861· Market maker
$205M981K0.05%Q2 2026
03
JPMORGAN CHASE & CO
CIK 0000019617
$123M583K0.01%Q2 2026
04
SIMPLEX TRADING, LLC
CIK 0001488542
$84M402K0.05%Q2 2026
05
GROUP ONE TRADING LLC
CIK 0000932540
$46M222K0.07%Q2 2026
06
CMT Capital Markets Trading GmbH
CIK 0001632813
$4M23K0.04%Q1 2026
07
Capital Markets Trading UK LLP
CIK 0001719165
$3M18K0.04%Q1 2026
08
RH Tailwind Management, LLC
CIK 0002065331
$2M10K0.20%Q2 2026
09
HRT FINANCIAL LP
CIK 0001475597
$798K5K0.00%Q4 2025
10
SG Americas Securities, LLC
CIK 0001313360
$21K26K0.00%Q1 2026
11
CONCOURSE FINANCIAL GROUP SECURITIES, INC.
CIK 0000752798
$00Q2 2025