Who owns Calamos S&P 500 Structured Alt Protection ETF – May?
Prices and market caps: Cboe delayed data, at least 15 minutes delayed. Not real-time. Fundamentals from company filings.
Institutional ownership of CPSM from SEC Form 13F filings across 30 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, 30 institutions disclosed 965,309 shares of Calamos S&P 500 Structured Alt Protection ETF – May worth $28.2M — about 50.4% of shares outstanding; the largest disclosed holder is Calamos Advisors LLC. Source: SEC Form 13F filings, parsed by EvidInvest.
30
13F holders
$28.2M
value, 2026 filers
50.4%
of shares outstanding (965,309 sh)
8
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 CPSM's shares outstanding
| # | Manager | Shares | Value | % of fund | % of co. | Δ shares QoQ |
|---|---|---|---|---|---|---|
| 1 | Calamos Advisors LLC | 327,705 | $9.6M | 0.0% | 17.1% | +0.3% |
| 2 | CENTAURUS FINANCIAL, INC. | 97,576 | $2.9M | 0.1% | 5.1% | +0.3% |
| 3 | Amplius Wealth Advisors, LLC | 73,632 | $2.2M | 0.2% | 3.8% | -11.1% |
| 4 | Advisory Services Network, LLC | 51,113 | $1.5M | 0.0% | 2.7% | -1.0% |
| 5 | Cambridge Investment Research Advisors, Inc. | 50,831 | $1.5M | 0.0% | 2.7% | +8.3% |
| 6 | Grantvest Financial Group LLCNEW | 41,820 | $1.2M | 0.7% | 2.2% | new |
| 7 | Sugar Maple Asset Management, LLC | 39,000 | $1.1M | 0.7% | 2% | 0.0% |
| 8 | COMMONWEALTH EQUITY SERVICES, LLC | 38,800 | $1.1M | 0.0% | 2% | 0.0% |
| 9 | BCGM Wealth Management, LLC | 35,650 | $1.0M | 0.2% | 1.9% | 0.0% |
| 10 | Cetera Investment Advisers | 33,431 | $978,124 | 0.0% | 1.7% | -3.2% |
| 11 | LPL Financial LLC | 20,506 | $599,964 | 0.0% | 1.1% | +29.7% |
| 12 | Calamos Wealth Management LLC | 19,585 | $573,057 | 0.0% | 1% | +36.3% |
| 13 | OSAIC HOLDINGS, INC. | 16,258 | $475,690 | 0.0% | 0.8% | +80.5% |
| 14 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 16,257 | $475,647 | 0.0% | 0.8% | -12.2% |
| 15 | Blue Water Asset Management | 15,962 | $467,016 | 0.2% | 0.8% | 0.0% |
| 16 | JPMORGAN CHASE & CO | 12,664 | $369,536 | 0.0% | 0.7% | -49.9% |
| 17 | Jessup Wealth Management, IncNEW | 11,499 | $336,438 | 0.1% | 0.6% | new |
| 18 | HARBOUR INVESTMENTS, INC. | 11,358 | $332,312 | 0.0% | 0.6% | -31.8% |
| 19 | NBZ Investment Advisors LLC | 10,946 | $320,258 | 0.1% | 0.6% | 0.0% |
| 20 | Mutual Advisors, LLC | 10,087 | $295,125 | 0.0% | 0.5% | 0.0% |
| 21 | Wick Capital Partners, LLC | 8,912 | $260,747 | 0.0% | 0.5% | 0.0% |
| 22 | Concurrent Investment Advisors, LLCNEW | 7,566 | $221,351 | 0.0% | 0.4% | new |
| 23 | Secure Asset Management, LLCNEW | 7,050 | $206,269 | 0.0% | 0.4% | new |
| 24 | FIDUCIARY FINANCIAL ADVISORSNEW | 2,575 | $75,338 | 0.0% | 0.1% | new |
| 25 | ARMSTRONG ADVISORY GROUP, INCNEW | 1,714 | $50,149 | 0.0% | 0.1% | new |
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. Research, not investment advice.