Calamos S&P 500 Structured Alt Protection ETF - September (CPST) Institutional Ownership $25.14 -0.13 (-0.51%) As of 03/28/2025 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)Number ofInstitutional Buyers(last 12 months)2TotalInstitutional Inflows(last 12 months)$542.19KNumber ofInstitutional Sellers(last 12 months)0 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. Email Address Remove Ads 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 CompanyDetails2/12/2025 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)Remove Ads 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 ($141K).Learn more on CPST's institutional investors. Which institutional investors have been buying Calamos S&P 500 Structured Alt Protection ETF - September stock? The following institutional investors have purchased Calamos S&P 500 Structured Alt Protection ETF - September 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. 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