NYSEARCA:CPST Calamos S&P 500 Structured Alt Protection ETF - September (CPST) Price, Holdings, & News $27.75 -0.04 (-0.14%) As of 04:10 PM Eastern Add Compare Share Share Stock Analysis Stock AnalysisChartHoldingsOwnershipSEC FilingsBuy This Stock 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$27.75▼$27.7550-Day Range$27.35▼$27.7952-Week Range$26.00▼$27.83Volume130 shsAverage Volume1,871 shsMarket Capitalization$33.30 millionAssets Under Management$31.95 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%0.51%0.53%Other Expenses0.00%0.27%0.55%0.58%0.55%Total Expense0.69%0.65%0.76%0.74%0.73%Fee Waiver0.00%-0.23%-0.64%-0.70%-0.62%Net Expense0.69%0.62%0.63%0.58%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) Trading Down 0.1% - What's Next?June 18, 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 on January 1st, 2026. Since then, CPST stock has increased by 2.7% and is now trading at $27.75. 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$31.95 million Average Daily Volume$0.00 Discount/Premium-0.03% 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 Shares1,200,000Beta0.19 Creation Unit25,000 Creation Fee$250.00 The 10 Best High-Yield Dividend Stocks for 2026Discover the 10 Best High-Yield Dividend Stocks for 2026 and secure reliable income in uncertain markets. Download the report now to identify top dividend payers and avoid common yield traps.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 6/24/2026 by MarketBeat.com Staff. From Our PartnersFirm That Predicted 2008, 2020, 2022: Right Now Looks WorseThe firm that predicted the dot-com crash, the 2008 financial crisis, the 2020 COVID crash, and the 2022 bear ...TradeSmith | SponsoredBlackRock is hoarding it. JPMorgan is hoarding it. 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