Calamos S&P 500 Structured Alt Protection ETF - September (CPST) Institutional Ownership $26.56 +0.04 (+0.15%) As of 08/29/2025 04:10 PM Eastern Add Compare Share Share Ownership Stock AnalysisChartHoldingsOwnershipBuy This Stock Institutional Ownership Changes (13F Filings) for Calamos S&P 500 Structured Alt Protection ETF - September (NYSEARCA:CPST)CurrentInstitutional OwnershipPercentage12.12%Number ofInstitutional Buyers(last 12 months)2TotalInstitutional Inflows(last 12 months)$542.19KNumber ofInstitutional Sellers(last 12 months)1TotalInstitutional Outflows(last 12 months)$55.13K Get CPST Insider Trade Alerts Want to know when executives and insiders are buying or selling Calamos S&P 500 Structured Alt Protection ETF - September stock? Sign up for InsiderTrades.com's daily newsletter to get the latest insider transactions delivered to your inbox daily. 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Calamos S&P 500 Structured Alt Protection ETF - September Major Shareholders & Ownership History Export to ExcelReporting DateMajor Shareholder NameShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails7/1/2025 Burkett Financial Services LLC3,481$91K0.0%-21.7%0.348% 4/11/2025 Burkett Financial Services LLC4,445$112K0.0%-21.1%0.445% 2/12/2025 OLD Mission Capital LLC24,384$617K0.0%+185.1%0.000% 10/8/2024 Burkett Financial Services LLC5,635$141K0.1%N/A0.000% (Data available from 1/1/2016 forward) CPST Institutional Ownership - Frequently Asked Questions Who are the largest shareholders of CPST shares? During the previous two years, the following institutional investors and hedge funds held shares of Calamos S&P 500 Structured Alt Protection ETF - September shares: OLD Mission Capital LLC ($617K), Burkett Financial Services LLC ($91K).Learn more on Calamos S&P 500 Structured Alt Protection ETF - September's institutional investors. What percentage of Calamos S&P 500 Structured Alt Protection ETF - September's stock is owned by institutional investors? 12.12% of Calamos S&P 500 Structured Alt Protection ETF - September's stock is owned by institutional investors. Learn more on CPST's institutional investor holdings. Which institutional investors have been buying Calamos S&P 500 Structured Alt Protection ETF - September's stock? The following institutional investors have purchased Calamos S&P 500 Structured Alt Protection ETF - September's stock in the last 24 months: OLD Mission Capital LLC ($15.83K), and Burkett Financial Services LLC ($5.64K). How much institutional buying is happening at Calamos S&P 500 Structured Alt Protection ETF - September? Institutional investors have bought a total of 21,467 shares in the last 24 months. This purchase volume represents approximately $542.19K in transactions. Which of Calamos S&P 500 Structured Alt Protection ETF - September's major shareholders have been selling company stock? The following institutional investors have sold Calamos S&P 500 Structured Alt Protection ETF - September stock in the last 24 months: Burkett Financial Services LLC ($2.15K). How much institutional selling is happening at Calamos S&P 500 Structured Alt Protection ETF - September? Institutional investors have sold a total of 2,154 shares in the last 24 months. This volume of shares sold represents approximately $55.13K in transactions. 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