DOSSIER · 13F Holders · Q2 2026
CBOY

CALAMOS

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

CUSIP 12811T647·9 13F holders·last filed Jun 30, 2026
Market cap
13F value held
$4M
visible holders
Holders
9
filers reporting
Concentration
31.94%
SUSQUEHANNA INTERNATIONAL GROUP, LLP #1
top holder share
AI Holders Summary · Q2 2026

9 institutions reported CBOY in Q2 2026. SUSQUEHANNA INTERNATIONAL GROUP, LLP leads at 31.9% of the visible book.

Top holders

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

#HolderValueShares% port.Quarter
01
SUSQUEHANNA INTERNATIONAL GROUP, LLP
CIK 0001446194· Market maker
$1M50K0.00%Q2 2026
02
Calamos Advisors LLC
CIK 0001316507
$585K24K0.00%Q2 2026
03
JANE STREET GROUP, LLC
CIK 0001595888· Market maker
$526K22K0.00%Q1 2026
04
ATX Financial Planning, LLC
CIK 0002111013
$425K17K0.28%Q2 2026
05
Markin Asset Management, LP
CIK 0002110806
$359K15K0.31%Q2 2026
06
Cambridge Investment Research Advisors, Inc.
CIK 0001419186
$329K14K0.00%Q1 2026
07
Advus Financial Partners, LLC
CIK 0002150676
$224K9K0.05%Q2 2026
08
HARBOUR INVESTMENTS, INC.
CIK 0000810121
$163K7K0.00%Q2 2026
09
Ankerstar Wealth, LLC
CIK 0002053917
$6K2490.01%Q2 2026