Koppers (KOP) Stock Chart & Stock Price History $26.96 +0.02 (+0.07%) Closing price 10/3/2025 03:59 PM EasternExtended Trading$26.96 +0.00 (+0.02%) As of 10/3/2025 04:10 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 ForecastsChartCompetitorsDividendEarningsFinancialsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestSustainabilityTrendsBuy This Stock Koppers Stock Price Performance The Koppers (KOP) stock chart highlights key performance trends across multiple timeframes. Over the last 12 months, the stock's price has decreased 26.38%, with a year-to-date return of -16.79%. In the past month, the stock has decreased 6.68%, reflecting recent market activity. As of the latest close, Koppers traded at $26.96 with a market cap of $531.54 million and volume of 157,808 shares. Five years ago, the stock traded at $22.38, representing a 20.46% increase over that period. At the time, it had a market cap of $471.01 million and a volume of 107,038 shares. Receive KOP Stock News and Ratings via EmailSign-up to receive the latest news and ratings for Koppers 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. 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Read our full terms of service and privacy policy. 5 Day Performance-3.68%1 Month Performance-6.68%3 Month Performance-19.98%Year-To-Date Performance-16.79%1 Year Performance-26.38%5 Year Performance+20.46% KOP Stock Chart for Sunday, October, 5, 2025 KOP Chart by TradingView Koppers 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 Capitalization10/03/2025$26.99$26.96-0.12%$27.49$26.91157,808 shs$531.54 million10/02/2025$27.89$26.99-3.21%$28.07$26.91137,841 shs$532.30 million10/01/2025$27.99$27.89-0.36%$27.98$27.46135,347 shs$549.95 million09/30/2025$27.78$27.99+0.76%$28.22$27.39123,755 shs$551.85 million09/29/2025$28.39$27.78-2.16%$28.63$27.75138,789 shs$547.82 million09/26/2025$28.20$28.39+0.71%$28.68$28.15121,925 shs$559.93 million09/25/2025$28.79$28.20-2.07%$28.75$28.10127,678 shs$556.01 million09/24/2025$28.78$28.79+0.04%$28.95$28.64114,550 shs$567.62 million09/23/2025$28.86$28.78-0.28%$29.49$28.73224,766 shs$567.50 million09/22/2025$29.01$28.86-0.52%$29.02$28.57227,062 shs$569.12 million Get the Latest News and Ratings for KOP and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Koppers and its competitors with MarketBeat's FREE daily newsletter. 09/19/2025$29.33$29.01-1.10%$29.36$28.56591,356 shs$572.08 million09/18/2025$28.93$29.33+1.40%$29.55$28.86222,003 shs$578.33 million09/17/2025$28.68$28.93+0.86%$29.90$28.53290,260 shs$570.44 million09/16/2025$28.68$28.68$29.16$28.43132,842 shs$565.57 million09/15/2025$28.76$28.68-0.28%$28.96$28.29139,985 shs$565.46 million09/12/2025$28.96$28.76-0.67%$28.98$28.14177,708 shs$567.03 million09/11/2025$27.58$28.96+5.00%$28.98$27.49199,120 shs$570.99 million09/10/2025$28.74$27.58-4.04%$28.82$27.38137,870 shs$543.82 million09/09/2025$28.72$28.74+0.06%$28.94$28.19198,366 shs$566.60 million09/08/2025$28.89$28.72-0.59%$28.94$28.35170,843 shs$566.36 million09/05/2025$28.62$28.89+0.96%$29.99$28.50159,568 shs$569.73 million09/04/2025$28.08$28.62+1.92%$28.69$27.97171,977 shs$564.33 million Related Companies Linde Stock Chart Cabot Stock Chart H. B. Fuller Stock Chart Manitowoc Stock Chart Westlake Stock Chart Kronos Worldwide Stock Chart Tredegar Stock Chart LyondellBasell Industries Stock Chart Hawkins Stock Chart Innospec Stock Chart Receive KOP Stock News and Ratings via EmailSign-up to receive the latest news and ratings for Koppers and its competitors with MarketBeat's FREE daily newsletter. This page (NYSE:KOP) was last updated on 10/5/2025 by MarketBeat.com Staff From Our PartnersMagnificent 7 being replaced by the “Hidden 7”?BULLISH: It's time to buy this 'hidden' AI stock An award-winning stock-rating system has turned BULLISH on...Chaikin Analytics | SponsoredU.S. Government Sparking Crypto RallyU.S. Puts GDP on the Blockchain Could this spark the next crypto supercycle? 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