DOSSIER · 13F Holders · Q2 2026

TRANSMEDICS GROUP INC

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

CUSIP 89377M909·7 13F holders·last filed Jun 30, 2026
Market cap
13F value held
$15M
visible holders
Holders
7
filers reporting
Concentration
68.40%
IMC-Chicago, LLC #1
top holder share
AI Holders Summary · Q2 2026

7 institutions reported TRANSMEDICS GROUP INC in Q2 2026. IMC-Chicago, LLC leads at 68.4% 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
$10M153K0.00%Q2 2026
02
SIMPLEX TRADING, LLC
CIK 0001488542
$3M44K0.00%Q2 2026
03
GROUP ONE TRADING LLC
CIK 0000932540
$983K15K0.00%Q2 2026
04
Perigon Wealth Management, LLC
CIK 0001575239
$697K11K0.01%Q2 2026
05
Carmel Capital Partners, LLC
CIK 0001900481
$133K2K0.04%Q2 2026
06
OSAIC HOLDINGS, INC.
CIK 0001677044
$1K10.00%Q2 2026
07
CONCOURSE FINANCIAL GROUP SECURITIES, INC.
CIK 0000752798
$00Q2 2025