Who owns Calamos Russell 2000 Structured Alt Protection ETF – October?
Prices and market caps: Cboe delayed data, at least 15 minutes delayed. Not real-time. Fundamentals from company filings.
Institutional ownership of CPRO from SEC Form 13F filings across 23 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, 23 institutions disclosed 471,493 shares of Calamos Russell 2000 Structured Alt Protection ETF – October worth $13.3M — about 46% of shares outstanding; the largest disclosed holder is CENTAURUS FINANCIAL, INC.. Source: SEC Form 13F filings, parsed by EvidInvest.
23
13F holders
$13.3M
value, 2026 filers
46%
of shares outstanding (471,493 sh)
5
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 CPRO's shares outstanding
| # | Manager | Shares | Value | % of fund | % of co. | Δ shares QoQ |
|---|---|---|---|---|---|---|
| 1 | CENTAURUS FINANCIAL, INC. | 89,901 | $2.5M | 0.1% | 8.8% | -1.4% |
| 2 | COMMONWEALTH EQUITY SERVICES, LLC | 79,982 | $2.3M | 0.0% | 7.8% | -4.1% |
| 3 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 74,658 | $2.1M | 0.0% | 7.3% | +405.4% |
| 4 | Owen LaRue, LLC | 54,121 | $1.5M | 0.5% | 5.3% | -2.0% |
| 5 | Calamos Wealth Management LLC | 27,738 | $781,379 | 0.0% | 2.7% | -21.2% |
| 6 | WEALTH ENHANCEMENT ADVISORY SERVICES, LLC | 26,048 | $734,814 | 0.0% | 2.5% | 0.0% |
| 7 | Capital Analysts, LLC | 17,361 | $489,000 | 0.0% | 1.7% | 0.0% |
| 8 | OLD MISSION CAPITAL LLC | 17,103 | $481,877 | 0.0% | 1.7% | -24.2% |
| 9 | Rooted Wealth Advisors, Inc. | 12,546 | $353,484 | 0.1% | 1.2% | 0.0% |
| 10 | FIDUCIARY FINANCIAL ADVISORSNEW | 10,563 | $297,613 | 0.0% | 1% | new |
| 11 | Sloy Dahl & Holst, LLC | 10,150 | $285,977 | 0.0% | 1% | +0.7% |
| 12 | HARBOUR INVESTMENTS, INC. | 9,587 | $270,114 | 0.0% | 0.9% | -89.8% |
| 13 | Astoria Portfolio Advisors LLC.NEW | 9,568 | $269,578 | 0.0% | 0.9% | new |
| 14 | STOLZ & ASSOCIATES, PS | 9,530 | $268,508 | 0.2% | 0.9% | 0.0% |
| 15 | MGO ONE SEVEN LLC | 9,000 | $253,575 | 0.0% | 0.9% | 0.0% |
| 16 | UBS Group AG | 4,329 | $121,970 | 0.0% | 0.4% | +2332.0% |
| 17 | Montgomery Financial Services LLCNEW | 2,416 | $68,071 | 0.1% | 0.2% | new |
| 18 | Farther Finance Advisors, LLC | 2,022 | $56,970 | 0.0% | 0.2% | -27.1% |
| 19 | CREATIVE FINANCIAL DESIGNS INC /ADV | 1,651 | $46,517 | 0.0% | 0.2% | -19.1% |
| 20 | BURKETT FINANCIAL SERVICES, LLC | 1,600 | $45,080 | 0.0% | 0.2% | -55.2% |
| 21 | Steward Partners Investment Advisory, LLC | 810 | $22,822 | 0.0% | 0.1% | 0.0% |
| 22 | ASSETMARK, INCNEW | 405 | $11,411 | 0.0% | 0% | new |
| 23 | TUCKER ASSET MANAGEMENT LLCNEW | 404 | $11,383 | 0.0% | 0% | 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.