Costain Group (COST) Stock Chart & Stock Price History GBX 128.60 -2.00 (-1.53%) As of 12:13 PM Eastern Add Compare Share Share Chart Stock AnalysisAnalyst ForecastsChartCompetitorsDividendEarningsHeadlinesInsider TradesBuy This Stock Costain Group Stock Price Performance The Costain Group (COST) stock chart highlights key performance trends across multiple timeframes. Over the last 12 months, the stock's price has increased 20.75%, with a year-to-date return of 21.32%. In the past month, the stock has decreased 22.34%, reflecting recent market activity. As of the latest close, Costain Group traded at GBX 130.60 with a market cap of £350.61 million and volume of 1.38 million shares. Five years ago, the stock traded at GBX 42.50, representing a 202.59% increase over that period. At the time, it had a market cap of £116.85 million and a volume of 15.49 million shares. 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Read our full terms of service and privacy policy. 5 Day Performance-4.32%1 Month Performance-22.34%3 Month Performance+5.93%Year-To-Date Performance+21.32%1 Year Performance+20.75%5 Year Performance+202.59% COST Stock Chart for Friday, September, 5, 2025 COST Chart by TradingView Costain Group 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 Capitalization09/04/2025GBX 131.60GBX 130.60-0.76%GBX 131.20GBX 128.601.38 million shs£350.61 million09/03/2025GBX 133GBX 131.60-1.05%GBX 134GBX 130.801.62 million shs£353.29 million09/02/2025GBX 135GBX 133-1.48%GBX 135.80GBX 1312.83 million shs£357.05 million09/01/2025GBX 134.40GBX 135+0.45%GBX 135.80GBX 133.981.94 million shs£362.42 million08/29/2025GBX 134.40GBX 134.40GBX 136.40GBX 133.203.17 million shs£359.99 million08/28/2025GBX 132.20GBX 134.40+1.66%GBX 135.20GBX 130.202.57 million shs£359.99 million08/27/2025GBX 129.80GBX 132.20+1.85%GBX 132.20GBX 128.201.53 million shs£354.10 million08/26/2025GBX 131.20GBX 129.80-1.07%GBX 134.80GBX 128.601.15 million shs£347.67 million08/25/2025GBX 131.20GBX 131.20GBX 132.63GBX 127.402.19 million shs£351.42 million08/22/2025GBX 129GBX 131.20+1.71%GBX 132.63GBX 127.402.19 million shs£351.42 million Get the Latest News and Ratings for COST and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Costain Group and its competitors with MarketBeat's FREE daily newsletter. 08/21/2025GBX 135.40GBX 129-4.73%GBX 137.40GBX 126.334.32 million shs£345.52 million08/20/2025GBX 163.40GBX 135.40-17.14%GBX 157.60GBX 13412.03 million shs£362.67 million08/19/2025GBX 165.60GBX 163.40-1.33%GBX 166.80GBX 158.202.01 million shs£437.66 million08/18/2025GBX 165.80GBX 165.60-0.12%GBX 166.80GBX 162.80658,426 shs£443.56 million08/15/2025GBX 162.40GBX 165.80+2.09%GBX 166GBX 162.801.42 million shs£444.09 million08/14/2025GBX 164.80GBX 162.40-1.46%GBX 166.40GBX 161947,194 shs£434.99 million08/13/2025GBX 169.72GBX 164.80-2.90%GBX 171.20GBX 164.601.37 million shs£441.41 million08/12/2025GBX 166.63GBX 169.72+1.85%GBX 170.80GBX 165.601.93 million shs£454.59 million08/11/2025GBX 167.44GBX 166.63-0.48%GBX 169.60GBX 165.23903,002 shs£446.32 million08/08/2025GBX 167.02GBX 167.44+0.25%GBX 169.40GBX 165.601.38 million shs£448.49 million08/07/2025GBX 167.40GBX 167.02-0.23%GBX 168.40GBX 1661.29 million shs£447.36 million08/06/2025GBX 165.60GBX 167.40+1.09%GBX 169.60GBX 165.60728,993 shs£448.38 million08/05/2025GBX 164GBX 165.60+0.98%GBX 168.27GBX 163.801.95 million shs£443.56 million08/04/2025GBX 162.40GBX 164+0.99%GBX 165GBX 160.801.42 million shs£439.27 million Related Companies PETS Stock Price Chart BOOT Stock Price Chart BIG Stock Price Chart HVT Stock Price Chart AEO Stock Price Chart DSG Stock Price Chart TSCO Stock Price Chart JD Stock Price Chart BBY Stock Price Chart RS1 Stock Price Chart Receive COST Stock News and Ratings via EmailSign-up to receive the latest news and ratings for Costain Group and its competitors with MarketBeat's FREE daily newsletter. 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