DOSSIER · 13F Holders · Q2 2026

MICROSTRATEGY INC

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

CUSIP 594972958·10 13F holders·last filed Jun 30, 2026
Market cap
13F value held
$1.6B
visible holders
Holders
10
filers reporting
Concentration
55.82%
IMC-Chicago, LLC #1
top holder share
AI Holders Summary · Q2 2026

10 institutions reported MICROSTRATEGY INC in Q2 2026. IMC-Chicago, LLC leads at 55.8% of the visible book.

Top holders

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

#HolderValueShares% port.Quarter
01
IMC-Chicago, LLC
CIK 0001452861· Market maker
$867M10.0M0.21%Q2 2026
02
SIMPLEX TRADING, LLC
CIK 0001488542
$282M3.2M0.17%Q2 2026
03
GROUP ONE TRADING LLC
CIK 0000932540
$185M2.1M0.26%Q2 2026
04
Optiver Holding B.V.
CIK 0001859606· Market maker
$145M1.7M0.04%Q2 2026
05
JPMORGAN CHASE & CO
CIK 0000019617
$66M716K0.00%Q2 2026
06
Marathon Trading Investment Management LLC
CIK 0001572748
$5M55K0.15%Q2 2026
07
Altshuler Shaham Ltd
CIK 0001324290
$2M3480.02%Q2 2026
08
CMT Capital Markets Trading GmbH
CIK 0001632813
$2M14K0.02%Q1 2026
09
SG Americas Securities, LLC
CIK 0001313360
$1K66K0.00%Q1 2026
10
CONCOURSE FINANCIAL GROUP SECURITIES, INC.
CIK 0000752798
$00Q2 2025