NYSEARCA:CPST Calamos S&P 500 Structured Alt Protection ETF - September (CPST) Price, Holdings, & News $28.13 -0.05 (-0.18%) As of 04:10 PM Eastern Add Compare Share Share Stock Analysis Stock AnalysisChartHoldingsOwnershipSEC Filings About Calamos S&P 500 Structured Alt Protection ETF - September (NYSEARCA:CPST) View Price History Chart DataSkip Price History Chart 1 Day 5 Days 30 Days 90 Days 1 Year Advanced 1 Day 1 Day 5 Days 30 Days 90 Days 1 Year Advanced Show volume Show extended hours Get CPST alerts:Sign Up Key Stats Today's Range$28.11▼$28.1850-Day Range$27.79▼$28.1852-Week Range$26.56▼$28.25Volume13,444 shsAverage Volume2,770 shsMarket Capitalization$33.76 millionAssets Under Management$33.92 millionDividend YieldN/ANet Expense Ratio0.69%Aggregate RatingN/A ETF Overview The Calamos S&P 500 Structured Alt Protection ETF - September (CPST) is an exchange-traded fund that mostly invests in large cap equity. Calamos S&P 500 Structured Alt Protection ETFTM September (the Fund) seeks to provide investment results that, before taking fees and expenses into account, match the positive price return of the SPDR S&P 500 ETF Trust (Underlying ETF) up to a cap of 7.50% (the Cap). CPST was launched on Sep 3, 2024 and is issued by Calamos. Read More Calamos S&P 500 Structured Alt Protection ETF - September ExpensesTypeCPSTLarge Cap ETFsEquity ETFsNYSEARCA ETFsAll ETFsManagement Fee0.69%0.58%0.57%0.50%0.53%Other Expenses0.00%0.28%0.53%0.60%0.54%Total Expense0.69%0.64%0.75%0.75%0.73%Fee Waiver0.00%-0.26%-0.67%-0.78%-0.68%Net Expense0.69%0.61%0.63%0.57%0.60% Receive CPST Stock News and Ratings via Email Sign-up to receive the latest news and ratings for Calamos S&P 500 Structured Alt Protection ETF - September and its competitors with MarketBeat's FREE daily newsletter. 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CPST ETF News HeadlinesCalamos S&P 500 Structured Alt Protection ETF - September (NYSEARCA:CPST) Stock Price Up 0% - Still a Buy?August 29, 2026 | americanbankingnews.comSee More Headlines CPST ETF - Frequently Asked Questions How have CPST shares performed this year? Calamos S&P 500 Structured Alt Protection ETF - September's stock was trading at $27.02 at the beginning of 2026. Since then, CPST shares have increased by 4.1% and is now trading at $28.13. Who are Calamos S&P 500 Structured Alt Protection ETF - September's major shareholders? Calamos S&P 500 Structured Alt Protection ETF - September's top institutional shareholders include Burkett Financial Services LLC (0.29%). How do I buy shares of Calamos S&P 500 Structured Alt Protection ETF - September? Shares of CPST stock can be purchased through any online brokerage account. Popular online brokerages with access to the U.S. stock market include Charles Schwab, E*TRADE, Fidelity, and Vanguard Brokerage Services. Fund Details IssuerCalamos Advisors Fund NameCalamos S&P 500 Structured Alt Protection ETF - September Tax ClassificationRegulated Investment Company Stock ExchangeNYSEARCACurrent SymbolNYSEARCA:CPST Inception Date9/3/2024 Fund ManagerEli Pars, Jason Hill, David O'Donohue, Jimmy Young, Anthony Vecchiolla WebN/A PhoneN/AFund Focus Asset ClassEquity BenchmarkN/A CategorySize and Style FocusLarge Cap Development LevelDeveloped Markets RegionNorth America Number of Holdings5 Fund Statistics Assets Under Management$33.92 million Average Daily Volume$0.00 Discount/Premium-0.09% Administrator, Advisor and Custodian AdministratorState Street Bank and Trust Company AdvisorCalamos Advisors, LLC CustodianState Street Bank and Trust Company DistributorCalamos Financial Services LLC Transfer AgentState Street Bank and Trust Company TrusteeN/A Lead Market MakerWolverine Trading Miscellaneous Outstanding Shares1,200,000Beta0.18 Creation Unit25,000 Creation Fee$250.00 (Almost) Everything You Need To Know About The EV MarketLooking to profit from the electric vehicle mega-trend? Click the link to see our list of which EV stocks show the most long-term potential.Get This Free Report Top 4 CPST Holdings4spy 260831 C 4.45 4spy 260831 C 4.45Holding Weight: 103.09%4spy 260831 P 645.05 4spy 260831 P 645.05Holding Weight: 3.96%UsdHolding Weight: 0.75%4spy 260831 C 687.56 4spy 260831 C 687.56Holding Weight: -7.80%Full Holdings DetailsCPST Geographic ExposureCPST Currency Exposure This page (NYSEARCA:CPST) was last updated on 9/4/2026 by MarketBeat.com Staff. From Our PartnersTrump’s “new Petrodollar” exposedTrump has reportedly secured control over 65 billion barrels across 17 Venezuelan oil fields, more than the en...Porter & Company | SponsoredMusk says UBI is coming. I say it's already here.Elon Musk says AI could make money irrelevant by 2036. 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