Who owns Calamos S&P 500 Structured Alt Protection ETF – August?
Prices and market caps: Cboe delayed data, at least 15 minutes delayed. Not real-time. Fundamentals from company filings.
Institutional ownership of CPSA from SEC Form 13F filings across 19 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.
As of the 2026-06-30 reporting period, 19 institutions disclosed 854,400 shares of Calamos S&P 500 Structured Alt Protection ETF – August worth $23.7M — about 56% of shares outstanding; the largest disclosed holder is Calamos Advisors LLC. Source: SEC Form 13F filings, parsed by EvidInvest.
19
13F holders
$23.7M
value, 2026 filers
56%
of shares outstanding (854,400 sh)
3
new positions (2026 filers)
Top institutional holders
ordered by shares owned · positions as of 2026-06-30 · % of fund = share of the manager's own book · % of co. = share of CPSA's shares outstanding
| # | Manager | Shares | Value | % of fund | % of co. | Δ shares QoQ |
|---|---|---|---|---|---|---|
| 1 | Calamos Advisors LLC | 345,822 | $9.6M | 0.0% | 22.7% | -22.2% |
| 2 | Calamos Wealth Management LLC | 98,636 | $2.7M | 0.1% | 6.5% | -12.0% |
| 3 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 74,759 | $2.1M | 0.0% | 4.9% | +51.2% |
| 4 | LPL Financial LLC | 51,898 | $1.4M | 0.0% | 3.4% | +2.0% |
| 5 | COMMONWEALTH EQUITY SERVICES, LLC | 47,225 | $1.3M | 0.0% | 3.1% | 0.0% |
| 6 | Blue Water Asset Management | 37,962 | $1.1M | 0.3% | 2.5% | -0.2% |
| 7 | CENTAURUS FINANCIAL, INC. | 33,523 | $931,000 | 0.0% | 2.2% | -5.4% |
| 8 | OSAIC HOLDINGS, INC. | 26,700 | $741,192 | 0.0% | 1.7% | +2327.3% |
| 9 | Camelot Portfolios, LLC | 23,302 | $646,875 | 0.5% | 1.5% | -1.3% |
| 10 | TrustBankNEW | 21,990 | $610,442 | 0.2% | 1.4% | new |
| 11 | Grantvest Financial Group LLC | 21,436 | $595,063 | 0.3% | 1.4% | -38.2% |
| 12 | Capital Analysts, LLC | 20,937 | $581,000 | 0.0% | 1.4% | 0.0% |
| 13 | OLD MISSION CAPITAL LLC | 13,225 | $367,126 | 0.0% | 0.9% | -48.1% |
| 14 | J.W. COLE ADVISORS, INC.NEW | 10,720 | $297,587 | 0.0% | 0.7% | new |
| 15 | Cambridge Investment Research Advisors, Inc. | 9,341 | $259,000 | 0.0% | 0.6% | -18.3% |
| 16 | Investment Partners Asset Management, Inc. | 8,176 | $226,966 | 0.1% | 0.5% | 0.0% |
| 17 | FIDUCIARY FINANCIAL ADVISORSNEW | 7,894 | $219,138 | 0.0% | 0.5% | new |
| 18 | Steward Partners Investment Advisory, LLC | 824 | $22,874 | 0.0% | 0.1% | 0.0% |
| 19 | New England Capital Financial Advisors LLC | 30 | $833 | 0.0% | 0% | 0.0% |
Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.