Costain Group (COST) Insider Trading & Ownership GBX 134.40 0.00 (0.00%) As of 08/29/2025 12:22 PM Eastern Add Compare Share Share Insider Trades Stock AnalysisAnalyst ForecastsChartCompetitorsDividendEarningsHeadlinesInsider TradesBuy This Stock Costain Group (LON:COST) Insider Buying and Selling ActivityCurrentInsider OwnershipPercentage47.48%Number OfInsiders Buying(Last 12 Months)2Amount OfInsider Buying(Last 12 Months)£46.70KNumber OfInsiders Selling(Last 12 Months)2Amount OfInsider Selling(Last 12 Months)£1.13M Get COST Insider Trade Alerts Want to know when executives and insiders are buying or selling Costain Group stock? Sign up for InsiderTrades.com's daily newsletter to get the latest insider transactions delivered to your inbox daily. 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COST Insider Buying and Selling by Quarter Costain Group Insider and Congressional Trades History Insiders and Members of Congress Insiders Only Members of Congress Only Transaction Type Custom Range 1 Month 3 Months 6 Months Year-to-Date 1 Year 2 Years 3 Years Time Frame Start Date End Date Export to Excel Transaction DateNameTitleBuy/SellNumber of SharesAverage Share PriceTotal TransactionDetails8/27/2025Kate RockInsiderBuy15,000GBX 132£19,8008/26/2025Amanda FisherInsiderBuy10,000GBX 131£13,1008/20/2025Kate RockInsiderBuy10,000GBX 138£13,8006/24/2025Alex VaughanInsiderSell214,285GBX 142£304,284.706/24/2025Alex VaughanInsiderSell241,639GBX 144£347,960.166/24/2025Helen WillisInsiderSell56,429GBX 144£81,257.766/24/2025Helen WillisInsiderSell100,082GBX 142£142,116.4410/28/2024Helen WillisInsiderSell234,555GBX 107£250,973.85 (Data available from 1/1/2013 forward) COST Insider Trading Activity - Frequently Asked Questions Who is on Costain Group's Insider Roster? The list of insiders at Costain Group includes Alex Vaughan, Amanda Fisher, Helen Willis, and Kate Rock. Learn more on insiders at COST. What percentage of Costain Group stock is owned by insiders? 47.48% of Costain Group stock is owned by insiders. Learn more on COST's insider holdings. Which Costain Group insiders have been buying company stock? The following insiders have purchased COST shares in the last 24 months: Amanda Fisher (£13,100), and Kate Rock (£63,100). How much insider buying is happening at Costain Group? Insiders have purchased a total of 85,000 COST shares in the last 24 months for a total of £76,200 bought. Which Costain Group insiders have been selling company stock? The following insiders have sold COST shares in the last 24 months: Alex Vaughan (£872,550.40), and Helen Willis (£474,348.05). How much insider selling is happening at Costain Group? Insiders have sold a total of 1,129,433 Costain Group shares in the last 24 months for a total of £1,346,898.45 sold. Costain Group Key ExecutivesMr. Alexander John Vaughan B.Sc. (Age 55)BSc (Hons), Dip IoD, FIoD, MRICS, CEO, Member of Group Executive Board & Director Compensation: $1.06MMs. Helen Margaret Willis A.C.A. (Age 60)B.Sc., CFO, Member Executive Board & Executive Director Compensation: $889.28kMs. Catherine Warbrick B.Sc.Chief People & Sustainability Officer and Member of Executive BoardMr. Sam White B.Sc.M.B.A., MD of Natural Resources & Member of Executive BoardMs. Nicole Geoghegan L.L.B.General Counsel, Company Secretary & Member of Executive BoardMr. Paul SharmaDirector of Investor RelationsMr. Jonathan WillcockManaging Director of Transportation More Insider Trading Tools from MarketBeat Related Companies PETS Insider Selling BOOT Insider Selling BIG Insider Selling AEO Insider Selling TSCO Insider Selling JD Insider Selling BBY Insider Selling RS1 Insider Selling PAG Insider Selling KLR Insider Selling Insider Tracking Tools CEO Purchases/Sales CFO Purchases/Sales Top Insider Buying Stocks Top Insider Selling Stocks Insider Trades Screener Insider Trades Newsletter Congressional Stock Trades Insider Trading By Country U.S. Insider Trading Activity Canadian Insider Trading Activity U.K. Insider Trading Activity Australia Insider Trading Activity Latest Articles Costco Faces Downgrades, Death Cross, Insider SellingReynolds Consumer Products Stock Price: Insiders Signal a BottomBuy, Sell, or Hold? Insiders Pile Into These 3 Healthcare StocksInsiders Trade Millions in NVIDIA-Linked Navitas, Hims, & Shift45 Stocks Insiders Are Selling That Analysts Say Buy This page (LON:COST) was last updated on 8/30/2025 by MarketBeat.com Staff From Our PartnersINVESTOR ALERT: Tiny “$3 AI Wonder Stock” on the Verge of Blasting OffRight now, we’re witnessing a monumental shift in the world.Traders Agency | SponsoredBuffett to put 90% of his money in this one stock?CPA and CFA says you have WAY too many stocks - just buy these 3 After years working at the biggest accoun...Altimetry | SponsoredThis is my Christian duty“This land I will give to you…” — a 4,000-year-old line from Genesis may hold the key to unlocking a $150 tril...Paradigm Press | SponsoredTrump’s national nightmare is hereAI is no longer just about chatbots — it’s becoming the backbone of the global economy. 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