DOSSIER · 13F Holders · Q3 2026

STEM INC

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

CUSIP 85859N950·3 13F holders·last filed Sep 30, 2026
Market cap
—
13F value held
$99K
visible holders
Holders
3
filers reporting
Concentration
91.81%
IMC-Chicago, LLC #1
top holder share
AI Holders Summary · Q3 2026

3 institutions reported STEM INC in Q3 2026. IMC-Chicago, LLC leads at 91.8% 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
$91K21K0.00%Q3 2026
02
SIMPLEX TRADING, LLC
CIK 0001488542
$6K1K0.00%Q3 2026
03
GROUP ONE TRADING LLC
CIK 0000932540
$3K6000.00%Q3 2026