Calamos Tax-Aware Collateral ETF (CBOX)

ETF ยท Cboe BZX

Calamos Tax-Aware Collateral ETF (CBOX) is an exchange-traded fund listed on Cboe BZX, where it has traded since April 15, 2026.

Type
Exchange-traded fund
Listed On
Cboe BZX
Listed Since
April 15, 2026

Institutional ownership

In 13F filings for the quarter ended June 30, 2026, 4 institutions reported holding CBOX, with 10.7 million shares worth $1.1 billion in aggregate. The largest reported holder was Calamos Advisors, with 10.7 million shares worth $1.1 billion. Of the 4 largest holders listed below, all 4 opened new positions in CBOX during the quarter.

InstitutionSharesValueQuarter change
Calamos Advisors10,693,254$1.1BNew position
Old Mission Capital21,248$2MNew position
Susquehanna International Group16,485$2MNew position
&Partners2,980$401KNew position

Form 13F is a quarterly report that institutional investment managers with at least $100 million in qualifying securities file with the SEC. It lists long positions as of the last day of the quarter and is due within 45 days of quarter end, so these holdings describe that date rather than today.

Frequently asked questions

What is CBOX?

Calamos Tax-Aware Collateral ETF (CBOX) is an exchange-traded fund listed on Cboe BZX, where it has traded since April 15, 2026.

Who are the largest institutional holders of CBOX?

In 13F filings for the quarter ended June 30, 2026, the largest reported holders of CBOX were Calamos Advisors, Old Mission Capital and Susquehanna International Group.

How many institutions own CBOX?

4 institutions reported a position in CBOX for the quarter ended June 30, 2026, worth $1.1 billion in total.

Did institutions buy or sell CBOX last quarter?

Of the 4 largest reported holders, all 4 opened new positions in CBOX during the quarter. Every reported holder and its change is on the SentiSense ownership page for CBOX.

Every reported institutional holder, plus insider and congressional trades in CBOX, on SentiSense.