Who owns CPSO?
Calamos S&P 500 Structured Alt Protection ETF - October · Calamos
21 institutions reported holding CPSO, worth $16.4M, in Form 13F filings for June 30, 2026.
Top 10 institutional holders of CPSO
| Firm | Location | Value | Shares | Change |
|---|---|---|---|---|
| Calamos Advisors LLC | Naperville, IL | $9.6M | 344,453 | −11,579 shares |
| Susquehanna International Group, LLP | Bala Cynwyd, PA | $1.6M | 57,083 | +30,448 shares |
| Commonwealth Equity Services, LLC | Waltham, MA | $670K | 24,062 | No change |
| Cambridge Investment Research Advisors, Inc. | Fairfield, IA | $634K | 22,770 | +11,385 shares |
| Blue Water Asset Management | Grand Rapids, MI | $570K | 20,481 | −10,322 shares |
| Calamos Wealth Management LLC | Naperville, IL | $553K | 19,867 | −5,587 shares |
| Rooted Wealth Advisors, Inc. | Bourbonnais, IL | $348K | 12,486 | No change |
| Grantvest Financial Group LLC | Matawan, NJ | $331K | 11,888 | −2,791 shares |
| Harbour Investments, Inc. | Madison, WI | $320K | 11,509 | −2,856 shares |
| Old Mission Capital LLC | Chicago, IL | $319K | 11,472 | −7,446 shares |
From SEC Form 13F, for managers with $100M+ in US securities. Change compares June 30, 2026 with March 31, 2026. “New position” means no holding in the prior filing we have.
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Frequently asked questions
Who owns CPSO?
21 institutional managers reported holding CPSO in Form 13F filings for June 30, 2026, worth $16.4M in total. The largest reported position was held by Calamos Advisors LLC, at $9.6M.
Did institutions buy or sell CPSO last quarter?
Reported 13F value rose 0.1% from March 31, 2026, which includes price moves as well as buying and selling. 3 firms reported a new position and 2 sold all of theirs.
What is a Form 13F?
A quarterly report filed with the SEC by institutional investment managers with $100 million or more in qualifying US securities. It lists their long positions at quarter end. It doesn't cover retail investors, cash, short positions, or managers under the threshold, so it shows part of a fund's ownership, not all of it.
How often is CPSO ownership data updated?
13F filings are due 45 days after each quarter ends. The next set is due around mid-November. Positions can be up to about four and a half months old by the time a new set arrives.