DOSSIER · 13F Holders · Q2 2026
CBOX

CALAMOS ETF TR

4 institutions still hold CALAMOS ETF TR as of Q2 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 12811T514·4 13F holders·last filed Jun 30, 2026
Market cap
13F value held
$1.1B
visible holders
Holders
4
filers reporting
Concentration
99.61%
Calamos Advisors LLC #1
top holder share
AI Holders Summary · Q2 2026

4 institutions reported CBOX in Q2 2026. Calamos Advisors LLC leads at 99.6% of the visible book.

Top holders

Sorted by position value. Source: SEC EDGAR 13F-HR filings.

#HolderValueShares% port.Quarter
01
Calamos Advisors LLC
CIK 0001316507
$1.1B10.7M3.58%Q2 2026
02
OLD MISSION CAPITAL LLC
CIK 0001455915
$2M21K0.03%Q2 2026
03
SUSQUEHANNA INTERNATIONAL GROUP, LLP
CIK 0001446194· Market maker
$2M16K0.00%Q2 2026
04
&PARTNERS
CIK 0000107136
$401K3K0.00%Q2 2026