Calamos S&P 500 Structured Alt Protection ETF - October (CPSO) Institutional Ownership $25.76 -0.08 (-0.33%) Closing price 09:01 AM EasternExtended Trading$25.76 0.00 (0.00%) As of 09:01 AM Eastern Extended trading is trading that happens on electronic markets outside of regular trading hours. This is a fair market value extended hours price provided by Polygon.io. Learn more. Add Compare Share Share Ownership Stock AnalysisChartHoldingsOwnershipBuy This Stock Institutional Ownership Changes (13F Filings) for Calamos S&P 500 Structured Alt Protection ETF - October (NYSEARCA:CPSO)Number ofInstitutional Buyers(last 12 months)10TotalInstitutional Inflows(last 12 months)$17.87MNumber ofInstitutional Sellers(last 12 months)1TotalInstitutional Outflows(last 12 months)$1.39M Get CPSO Insider Trade Alerts Want to know when executives and insiders are buying or selling Calamos S&P 500 Structured Alt Protection ETF - October stock? 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Email Address Skip Chart & View Institutional Buying and Selling Data CPSO Institutional Buying and Selling by Quarter Calamos S&P 500 Structured Alt Protection ETF - October Major Shareholders & Ownership History Export to ExcelReporting DateMajor Shareholder NameShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails5/14/2025 Capital Analysts LLC11,151$283K0.0%+19.0%1.784% 5/12/2025 Sloy Dahl & Holst LLC10,740$273K0.0%+14.3%1.481% 5/8/2025 Harbour Investments Inc.4,515$114K0.0%+27.7%0.623% 4/29/2025 Calamos Advisors LLC202,948$5.15M0.0%-21.3%27.993% 3/17/2025 Wealth Enhancement Advisory Services LLC102,197$2.60M0.0%N/A14.096% 3/12/2025 Centaurus Financial Inc.83,166$2.12M0.1%N/A10.396% 2/17/2025 Cetera Investment Advisers8,486$216K0.0%N/A0.000% 2/14/2025 Capital Analysts LLC9,373$239K0.0%N/A0.000% 2/13/2025 Envestnet Asset Management Inc.221,348$5.64M0.0%N/A0.000% 2/12/2025Tucker Asset Management LLC1,782$45K0.0%N/A0.000% 2/10/2025 Harbour Investments Inc.3,535$90K0.0%N/A0.000% 2/10/2025 Commonwealth Equity Services LLC33,068$842K0.0%N/A0.000% 2/10/2025 VanWeelden Wealth Management LLC225,027$5.73M5.2%N/A0.000% 1/27/2025 Sloy Dahl & Holst LLC9,400$239K0.0%N/A0.000% (Data available from 1/1/2016 forward) CPSO Institutional Ownership - Frequently Asked Questions Who are the largest shareholders of CPSO shares? During the previous two years, 11 institutional investors and hedge funds held shares of Calamos S&P 500 Structured Alt Protection ETF - October. The most heavily invested institutionals were VanWeelden Wealth Management LLC ($5.73M), Envestnet Asset Management Inc. ($5.64M), Calamos Advisors LLC ($5.15M), Wealth Enhancement Advisory Services LLC ($2.60M), Centaurus Financial Inc. ($2.12M), Commonwealth Equity Services LLC ($842K), and Capital Analysts LLC ($283K).Learn more on CPSO's institutional investors. Which institutional investors have been buying Calamos S&P 500 Structured Alt Protection ETF - October stock? Of the 10 institutional investors that purchased Calamos S&P 500 Structured Alt Protection ETF - October stock in the last 24 months, the following investors and hedge funds have bought the highest volume of shares: VanWeelden Wealth Management LLC ($225.03K), Envestnet Asset Management Inc. ($221.35K), Wealth Enhancement Advisory Services LLC ($102.20K), Centaurus Financial Inc. ($83.17K), Commonwealth Equity Services LLC ($33.07K), Capital Analysts LLC ($11.15K), and Sloy Dahl & Holst LLC ($10.74K). How much institutional buying is happening at Calamos S&P 500 Structured Alt Protection ETF - October? Institutional investors have bought a total of 701,480 shares in the last 24 months. This purchase volume represents approximately $17.87M in transactions. Which Calamos S&P 500 Structured Alt Protection ETF - October major shareholders have been selling company stock? The following institutional investors have sold Calamos S&P 500 Structured Alt Protection ETF - October stock in the last 24 months: Calamos Advisors LLC ($54.94K). How much institutional selling is happening at Calamos S&P 500 Structured Alt Protection ETF - October? Institutional investors have sold a total of 54,935 shares in the last 24 months. This volume of shares sold represents approximately $1.39M in transactions. Related Companies MAYT Institutional Ownership EGGS Institutional Ownership QNXT Institutional Ownership CPNM Institutional Ownership JUNT Institutional Ownership KSPY Institutional Ownership QCJL Institutional Ownership RSDE Institutional Ownership DWSH Institutional Ownership FLAO Institutional Ownership This page (NYSEARCA:CPSO) was last updated on 5/22/2025 by MarketBeat.com Staff From Our PartnersJuly 2025 Rule Change to Impact Retirement InvestorsThere's a massive change from a new rule going into effect this July. And it's one the Big Banks are alread...Premier Gold Co | SponsoredElon’s 2025 Silver Crisis (What It Means for You)Elon Musk is back in the spotlight—this time for fueling a global scramble for silver. Tesla's relentless p...GoldenCrest Metals | SponsoredElon’s backup plan for AIElon knows the future isn’t about smarter AI — it’s about powering it. 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