DOSSIER · 13F Holders · Q3 2026

OSI SYSTEMS INC

3 institutions still hold OSI SYSTEMS INC as of Q3 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 671044905·3 13F holders·last filed Sep 30, 2026
Market cap
—
13F value held
$11M
visible holders
Holders
3
filers reporting
Concentration
52.84%
IMC-Chicago, LLC #1
top holder share
AI Holders Summary · Q3 2026

3 institutions reported OSI SYSTEMS INC in Q3 2026. IMC-Chicago, LLC leads at 52.8% 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
$6M31K0.00%Q3 2026
02
GROUP ONE TRADING LLC
CIK 0000932540
$5M27K0.01%Q3 2026
03
CONCOURSE FINANCIAL GROUP SECURITIES, INC.
CIK 0000752798
$00—Q2 2025