Prime Medicine (PRME) Insider Trading & Ownership $6.45 +0.58 (+9.88%) Closing price 10/8/2025 04:00 PM EasternExtended Trading$6.54 +0.09 (+1.40%) As of 07:30 AM 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 ForecastsChartCompetitorsEarningsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestTrendsBuy This Stock Prime Medicine (NYSE:PRME) Insider Buying and Selling ActivityCurrentInsider OwnershipPercentage22.74%Number OfInsiders Buying(Last 12 Months)2Amount OfInsider Buying(Last 12 Months)$10.11MNumber OfInsiders Selling(Last 12 Months)0 Get PRME Insider Trade Alerts Want to know when executives and insiders are buying or selling Prime Medicine stock? 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PRME Insider Buying and Selling by Quarter Prime Medicine 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 TransactionDetails8/1/2025Arch Venture Partners Xii, LlcMajor ShareholderBuy3,030,300$3.30$9,999,990.00 6/23/2025David R LiuMajor ShareholderBuy21,000$2.16$45,360.00 6/16/2025David R LiuMajor ShareholderBuy21,000$1.49$31,290.00 6/11/2025David R LiuMajor ShareholderBuy21,000$1.60$33,600.00 (Data available from 1/1/2013 forward) PRME Insider Trading Activity - Frequently Asked Questions Who is on Prime Medicine's Insider Roster? The list of insiders at Prime Medicine includes 2019 Gp L.L.C. Gv, Arch Venture Partners Xii, Llc, David R Liu, and Robert Nelsen. Learn more on insiders at PRME. What percentage of Prime Medicine stock is owned by insiders? 22.74% of Prime Medicine stock is owned by insiders. Learn more on PRME's insider holdings. Which Prime Medicine insiders have been buying company stock? The following insiders have purchased PRME shares in the last 24 months: Arch Venture Partners Xii, Llc ($9,999,990.00), David R Liu ($110,250.00), and Robert Nelsen ($20,000,000.00). How much insider buying is happening at Prime Medicine? Insiders have purchased a total of 6,293,300 PRME shares in the last 24 months for a total of $30,110,240.00 bought. Prime Medicine Key ExecutivesDr. Keith Michael Gottesdiener M.D. (Age 70)Ph.D., President, CEO, Secretary & Director Compensation: $1.06MDr. Ann L. Lee Ph.D. (Age 62)Chief Technical Officer Compensation: $684.78kDr. Jeremy S. Duffield M.D. (Age 56)Ph.D., Chief Scientific Officer Compensation: $680.65kDr. Andrew Anzalone M.D. (Age 37)Ph.D., Co-Founder & Head of Prime Editing Platform Dr. David R. Liu Ph.D.Co-Founder & Chair of Scientific Advisory BoardDr. Allan Reine M.D. (Age 49)Chief Financial Officer Dr. Meredith Goldwasser (Age 53)Senior VP and Head of Strategy & Corporate Operations Ms. Carman Alenson CPA (Age 58)M.B.A., Senior VP of Finance & Chief Accounting Officer Dr. Karen Brown J.D.Ph.D., Senior Vice President of Intellectual Property & Legal AffairsMs. Niamh AlixChief Human Resources Officer More Insider Trading Tools from MarketBeat Related Companies Apellis Pharmaceuticals Insider Trades Gemini Therapeutics Insider Trades Immunovant Insider Trades Organon & Co. 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