Compass Therapeutics (CMPX) Stock Chart & Stock Price History $3.49 0.00 (0.00%) Closing price 04:00 PM EasternExtended Trading$3.50 +0.01 (+0.43%) As of 07:25 PM 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 Chart Stock AnalysisAnalyst ForecastsChartCompetitorsEarningsFDA EventsHeadlinesInsider TradesOwnershipSEC FilingsShort InterestTrendsBuy This Stock Compass Therapeutics Stock Price Performance The Compass Therapeutics (CMPX) stock chart highlights key performance trends across multiple timeframes. Over the last 12 months, the stock's price has increased 101.73%, with a year-to-date return of 140.69%. In the past month, the stock has increased 15.56%, reflecting recent market activity. As of the latest close, Compass Therapeutics traded at $3.49 with a market cap of $482.61 million and volume of 1.11 million shares. Receive CMPX Stock News and Ratings via EmailSign-up to receive the latest news and ratings for Compass Therapeutics and its competitors with MarketBeat's FREE daily newsletter. Subscribe Now 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. 5 Day Performance+2.95%1 Month Performance+15.56%3 Month Performance+29.74%Year-To-Date Performance+140.69%1 Year Performance+101.73% CMPX Stock Chart for Thursday, September, 25, 2025 CMPX Chart by TradingView Compass Therapeutics Stock Price History Daily Weekly Monthly Yearly Time Frame Custom Range 1 Month 3 Months 6 Months Year-to-Date 1 Year 3 Year 5 Year Time Frame Start Date End Date Export to Excel DateOpening PriceClosing PriceHighLowVolumeMarket Capitalization09/25/2025$3.49$3.49$3.59$3.411.17 million shs$482.60 million09/24/2025$3.38$3.49+3.25%$3.54$3.381.11 million shs$482.61 million09/23/2025$3.49$3.38-3.15%$3.61$3.371.53 million shs$467.39 million09/22/2025$3.39$3.49+2.95%$3.50$3.281.95 million shs$482.60 million09/19/2025$3.68$3.39-7.88%$3.81$3.386.71 million shs$468.77 million09/18/2025$3.51$3.68+4.84%$3.71$3.51681,231 shs$508.87 million09/17/2025$3.61$3.51-2.77%$3.68$3.48806,588 shs$485.36 million09/16/2025$3.69$3.61-2.17%$3.77$3.60818,731 shs$499.19 million09/15/2025$3.57$3.69+3.36%$3.72$3.441.26 million shs$510.25 million09/12/2025$3.53$3.57+1.13%$3.62$3.44593,713 shs$493.66 million Get the Latest News and Ratings for CMPX and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Compass Therapeutics and its competitors with MarketBeat's FREE daily newsletter. 09/11/2025$3.52$3.53+0.28%$3.70$3.371.96 million shs$486.76 million09/10/2025$3.48$3.52+1.15%$3.61$3.451.65 million shs$486.75 million09/09/2025$3.44$3.48+1.16%$3.51$3.37460,150 shs$481.21 million09/08/2025$3.44$3.44$3.55$3.40910,971 shs$475.69 million09/05/2025$3.37$3.44+2.08%$3.52$3.37388,871 shs$475.69 million09/04/2025$3.37$3.37$3.45$3.29393,945 shs$466.00 million09/03/2025$3.43$3.37-1.75%$3.48$3.37322,999 shs$466.00 million09/02/2025$3.49$3.43-1.72%$3.52$3.381.30 million shs$474.31 million09/01/2025$3.49$3.49$3.50$3.29702,510 shs$482.60 million08/29/2025$3.49$3.49$3.50$3.29702,510 shs$482.60 million08/28/2025$3.28$3.49+6.40%$3.62$3.291.40 million shs$482.60 million08/27/2025$3.15$3.28+4.13%$3.31$3.08822,870 shs$453.57 million08/26/2025$3.02$3.15+4.30%$3.17$3.03630,977 shs$435.58 million08/25/2025$3.02$3.02$3.07$2.96866,011 shs$417.61 million Related Companies ADPT Stock Price Chart MESO Stock Price Chart DYN Stock Price Chart HRMY Stock Price Chart IMCR Stock Price Chart APGE Stock Price Chart SRPT Stock Price Chart AUPH Stock Price Chart CDTX Stock Price Chart VCEL Stock Price Chart Receive CMPX Stock News and Ratings via EmailSign-up to receive the latest news and ratings for Compass Therapeutics and its competitors with MarketBeat's FREE daily newsletter. 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