Ownership

13F as of Q2 2026 · 160.4M shares outstanding

Who owns CSQ?

By type of holder

Institutions 0.0% Insiders 0.0% Everyone else 100.0%

Concentration Top 1 holders own 0.0%

Koudounis John S. 0.0%

Institutional ownership

0.0%

0.0 pts vs last qtr

Institutional holders

0 vs last qtr

Net shares bought

by institutions in Q2 2026

New / sold out

0 / 0

positions opened vs closed

Institutions, last 8 quarters

No 13F manager has reported this stock in the last 8 quarters.

Biggest buyers in Q2 2026

None.

Biggest sellers in Q2 2026

None.

No insider has filed a notice of proposed sale (Form 144) for Calamos Strategic Total Return Fund in the last 12 months.

There are not yet two fiscal years of reported share counts for Calamos Strategic Total Return Fund.

No 13F manager reports holding CSQ.

Investment managers reporting CSQ on Form 13F

No 13F manager reports holding CSQ yet.

Mutual funds and ETFs reporting CSQ on Form N-PORT; together they hold 0.0% of the company

No fund reports holding CSQ yet.

From Forms 3/4/5 and Schedules 13D/G

Holder	Shares	% of company	Change vs last qtr	8 quarters	Held since	% of their book
KJ Koudounis John S. Insider	29.1K	0.02%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company0.020% Koudounis John S.'s insider activity →

Koudounis John S.

Insider

29.1K

% of company

0.02%

Change vs last qtr

—

Held since

—

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