DOSSIER · 13F Holders · Q3 2026

COMPASS THERAPEUTICS INC

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

CUSIP 20454B954·5 13F holders·last filed Sep 30, 2026
Market cap
—
13F value held
$240K
visible holders
Holders
5
filers reporting
Concentration
48.32%
IMC-Chicago, LLC #1
top holder share
AI Holders Summary · Q3 2026

5 institutions reported COMPASS THERAPEUTICS INC in Q3 2026. IMC-Chicago, LLC leads at 48.3% 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
$116K112K0.00%Q3 2026
02
SIMPLEX TRADING, LLC
CIK 0001488542
$70K68K0.00%Q3 2026
03
HRT FINANCIAL LP
CIK 0001475597
$27K27K0.00%Q3 2026
04
GROUP ONE TRADING LLC
CIK 0000932540
$27K26K0.00%Q3 2026
05
CONCOURSE FINANCIAL GROUP SECURITIES, INC.
CIK 0000752798
$00—Q2 2025