NYSEARCA:CPST Calamos S&P 500 Structured Alt Protection ETF - September (CPST) Price, Holdings, & News $26.73 +0.04 (+0.15%) As of 04:10 PM Eastern Add Compare Share Share Stock Analysis Stock AnalysisChartHoldingsOwnershipBuy 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$26.71▼$26.7550-Day Range$26.18▼$26.6952-Week Range$24.63▼$26.75Volume7,871 shsAverage Volume3,687 shsMarket Capitalization$26.73 millionAssets Under Management$30.08 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%0.56%0.51%0.53%Other Expenses0.00%0.27%0.56%0.59%0.56%Total Expense0.69%0.65%0.76%0.74%0.73%Fee Waiver0.00%-0.23%-0.66%-0.71%-0.63%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. Submit View SMS TermsBy entering your phone number and clicking the sign-up button, you agree to receive periodic text messages from MarketBeat at the phone number you submitted, including texts that may be sent using an automatic telephone dialing system. Message and data rates may apply. Message frequency will vary. Messages will consist of stock alerts, news stories, and partner advertisements/offers. Consent is not a condition of the purchase of any goods or services. Text HELP for help/customer support. Unsubscribe at any time by replying "STOP" to any text message that you receive from MarketBeat or by visiting our mailing preferences page. Read our full terms of service and privacy policy. CPST ETF News HeadlinesNo headlines for this company have been tracked by MarketBeat.com 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 $25.32 at the start of the year. Since then, CPST stock has increased by 5.6% and is now trading at $26.73. 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 investors include Burkett Financial Services LLC (0.35%). 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 Date8/29/2024 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$30.08 million Average Daily Volume$0.00 Discount/Premium-0.04% 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 Shares1,000,000BetaN/A Creation Unit25,000 Creation Fee$250.00 A Guide To High-Short-Interest StocksMarketBeat's analysts have just released their top five short plays for September 2025. 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Enter your email address to see which companies made the list.Get This Free Report Top 4 CPST Holdings4Spy 250829 C 0.79 4Spy 250829 C 0.79Holding Weight: 103.74%4Spy 250829 P 563.68 4Spy 250829 P 563.68Holding Weight: 0.56%UsdHolding Weight: 0.02%4Spy 250829 C 606.01 4Spy 250829 C 606.01Holding Weight: -4.32%Full Holdings DetailsCPST Geographic ExposureCPST Currency Exposure This page (NYSEARCA:CPST) was last updated on 9/18/2025 by MarketBeat.com Staff From Our PartnersREVEALED: Something Big Happening Behind White House Doorswhat I just learned about what’s unfolding in the White House is truly stunning… And you need to see it for...Paradigm Press | SponsoredNvidia CEO Makes First Ever Tesla AnnouncementWhile headlines focus on Tesla’s car sales, tech analyst Jeff Brown says the real story is Tesla’s role in a $...Brownstone Research | SponsoredCrypto Gets Official Government Backing—Here's the WinnerTrump Just Signed the GENIUS Act—One Coin is About to Explode We're at the BEGINNING of smart money really ...Crypto 101 Media | SponsoredCapital Gains Tax Strategies for SeniorsCapital gains taxes can take a bite out of your retirement income—unless you have a smart strategy. 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