DOSSIER · 13F Holders · Q2 2026

MONOLITHIC PWR SYS INC

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

CUSIP 609839905·5 13F holders·last filed Jun 30, 2026
Market cap
13F value held
$51M
visible holders
Holders
5
filers reporting
Concentration
93.16%
IMC-Chicago, LLC #1
top holder share
AI Holders Summary · Q2 2026

5 institutions reported MONOLITHIC PWR SYS INC in Q2 2026. IMC-Chicago, LLC leads at 93.2% 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
$48M35K0.01%Q2 2026
02
SIMPLEX TRADING, LLC
CIK 0001488542
$3M2K0.00%Q2 2026
03
GROUP ONE TRADING LLC
CIK 0000932540
$829K6000.00%Q2 2026
04
OSAIC HOLDINGS, INC.
CIK 0001677044
$64K10.00%Q2 2026
05
CONCOURSE FINANCIAL GROUP SECURITIES, INC.
CIK 0000752798
$00Q2 2025