Summit Therapeutics (SMMT) Insider Trading & Ownership $19.16 +0.42 (+2.24%) Closing price 10/22/2025 04:00 PM EasternExtended Trading$19.00 -0.16 (-0.86%) As of 10/22/2025 07:58 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 Insider Trades Stock AnalysisAnalyst ForecastsChartCompetitorsEarningsFDA EventsFinancialsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestTrendsBuy This Stock Summit Therapeutics (NASDAQ:SMMT) Insider Buying and Selling ActivityCurrentInsider OwnershipPercentage84.90%Number OfInsiders Buying(Last 12 Months)2Amount OfInsider Buying(Last 12 Months)$11.97MNumber OfInsiders Selling(Last 12 Months)0 Get SMMT Insider Trade Alerts Want to know when executives and insiders are buying or selling Summit Therapeutics stock? 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SMMT Insider Buying and Selling by Quarter Summit Therapeutics 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 TransactionDetails9/11/2025Mahkam ZanganehCEOBuy5,000$18.07$90,350.00 9/11/2025Robert W DugganCEOBuy5,000$18.07$90,350.00 9/10/2025Mahkam ZanganehCEOBuy333,394$17.68$5,894,405.92 9/10/2025Robert W DugganCEOBuy333,394$17.68$5,894,405.92 (Data available from 1/1/2013 forward) SMMT Insider Trading Activity - Frequently Asked Questions Who is on Summit Therapeutics' Insider Roster? The list of insiders at Summit Therapeutics includes Ankur Dhingra, Mahkam Zanganeh, Manmeet Singh Soni, and Robert W Duggan. Learn more on insiders at SMMT. What percentage of Summit Therapeutics stock is owned by insiders? 84.90% of Summit Therapeutics stock is owned by insiders. Learn more on SMMT's insider holdings. Which Summit Therapeutics insiders have been buying company stock? The following insiders have purchased SMMT shares in the last 24 months: Ankur Dhingra ($419,268.00), Mahkam Zanganeh ($6,107,605.92), and Robert W Duggan ($5,984,755.92). How much insider buying is happening at Summit Therapeutics? Insiders have purchased a total of 832,188 SMMT shares in the last 24 months for a total of $12,511,629.84 bought. Summit Therapeutics Key ExecutivesMr. Robert W. Duggan (Age 80)Co-CEO & Executive Chairman 2 recent tradesDr. Mahkam Zanganeh D.D.S. (Age 54)M.B.A., Co-CEO, President & Director Compensation: $657.81kMr. Manmeet Singh Soni (Age 46)COO, CFO & Director Compensation: $591.5kProf. Dame Kay Davies DBE (Age 73)FRS CBE, Co-Founder, Chairman of Scientific Advisory Board and Scientific Advisor Mr. Bhaskar Anand (Age 46)Chief Accounting Officer & Head of Finance Ms. Abby Guzman MurphyHead of Human ResourcesMs. Divya Chari (Age 56)Head of Global Clinical Operations Mr. Dave GancarzChief Business & Strategy OfficerDr. Betty Y. Chang Ph.D.Head of Research, Oncology & InflammationDr. Fong ClowChief Biometrics Officer More Insider Trading Tools from MarketBeat Related Companies MRK Insider Ownership ARGX Insider Ownership TAK Insider Ownership INSM Insider Ownership ONC Insider Ownership BNTX Insider Ownership TEVA Insider Ownership GMAB Insider Ownership VTRS Insider Ownership ROIV Insider Ownership 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 WesBanco Insiders Signal Confidence With Coordinated BuysBig Insider Sales at NVDA, DELL, TMUS Raise Questions—Or Do They?3 Healthcare Companies Insiders Are Buying Marvell Insiders Buy Shares—Should Investors Follow Suit?This Insider Just Made a Massive Bet on Transocean's Comeback This page (NASDAQ:SMMT) was last updated on 10/23/2025 by MarketBeat.com Staff From Our PartnersNEW LAW: Congress Approves Setup For Digital Dollar?Trump Ally Says Congress Approved the Setup for a Digital Dollar 2.0 But according to Rep. 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