Merck & Co., Inc. (MRK) Insider Trading & Ownership $114.23 +1.67 (+1.49%) Closing price 03:59 PM EasternExtended Trading$113.99 -0.24 (-0.21%) As of 07:57 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 Massive. Learn more. Add Compare Share Share Insider Trades Stock AnalysisAnalyst ForecastsChartCompetitorsDividendEarningsFDA EventsFinancialsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestTrendsBuy This Stock Merck & Co., Inc. (NYSE:MRK) Insider Buying and Selling ActivityCurrentInsider OwnershipPercentage0.17%Number OfInsiders Buying(Last 12 Months)0Number OfInsiders Selling(Last 12 Months)9Amount OfInsider Selling(Last 12 Months)$39.00M Get MRK Insider Trade Alerts Want to know when executives and insiders are buying or selling Merck & Co., Inc. stock? 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Read our full terms of service and privacy policy. MRK Insider Buying and Selling by Quarter Merck & Co., Inc. 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 Transaction DateInsiderBuy/SellNumber of SharesAverage Share PriceTotal TransactionDetails3/10/2026Ro KhannaHouse (D-CA)Buy$117.14$15,001 - $50,0002/9/2026Chirfi GuindoCMOSell10,000$118.41$1,184,100.00 2/9/2026Jennifer ZacharyEVPSell121,573$119.15$14,485,422.95 2/6/2026David Michael WilliamsEVPSell5,000$121.91$609,550.00 2/6/2026Johannes Jacobus OosthuizenInsiderSell15,000$121.87$1,828,050.00 2/6/2026Richard R DelucaEVPSell37,685$120.92$4,556,870.20 2/5/2026Chirfi GuindoCMOSell20,000$121.88$2,437,600.00 2/4/2026Caroline LitchfieldCFOSell41,997$119.61$5,023,261.17 2/4/2026Dalton E Smart IIISVPSell6,400$119.67$765,888.00 2/4/2026Dean Y LiVPSell15,087$118.77$1,791,882.99 2/4/2026Robert M DavisCEOSell47,434$118.04$5,599,109.36 Get Insider Trades Delivered To Your InboxEnter your email address below to receive a concise daily summary of insider buying activity, insider selling activity and changes in hedge fund holdings. 2/4/2026Josh GottheimerHouse (D-NJ)Buy$118.35$1,001 - $15,0001/13/2026Michael T. McCaulHouse (R-TX)Sell$108.20$15,001 - $50,00012/19/2025Gilbert Ray Cisneros, Jr.House (D-CA)Buy$100.92$1,001 - $15,00012/18/2025Julie JohnsonHouse (D-TX)Sell$100.76$1,001 - $15,00011/18/2025Gilbert Ray Cisneros, Jr.House (D-CA)Buy$96.61$1,001 - $15,00011/13/2025Julie JohnsonHouse (D-TX)Sell$92.99$1,001 - $15,00011/3/2025David Michael WilliamsEVPSell8,614$83.59$720,044.26 (Data available from 1/1/2013 forward) MRK Insider Trading Activity - Frequently Asked Questions Who is on Merck & Co., Inc.'s Insider Roster? The list of insiders at Merck & Co., Inc. includes Caroline Litchfield, Chirfi Guindo, Cristal N Downing, Dalton E Smart III, David Michael Williams, Dean Y Li, Inge G Thulin, Jennifer Zachary, Johannes Jacobus Oosthuizen, Joseph Romanelli, Richard R Deluca, Robert M Davis, and Steven Mizell. Learn more on insiders at MRK. What percentage of Merck & Co., Inc. stock is owned by insiders? 0.17% of Merck & Co., Inc. stock is owned by insiders. Learn more on MRK's insider holdings. Which Merck & Co., Inc. insiders have been buying company stock? The following insider purchased MRK shares in the last 24 months: Inge G Thulin ($250,012.25). How much insider buying is happening at Merck & Co., Inc.? Insiders have purchased a total of 2,833 MRK shares in the last 24 months for a total of $250,012.25 bought. Which Merck & Co., Inc. insiders have been selling company stock? The following insiders have sold MRK shares in the last 24 months: Caroline Litchfield ($5,023,261.17), Chirfi Guindo ($3,621,700.00), Cristal N Downing ($209,562.36), Dalton E Smart III ($1,118,611.12), David Michael Williams ($1,329,594.26), Dean Y Li ($1,791,882.99), Jennifer Zachary ($14,485,422.95), Johannes Jacobus Oosthuizen ($1,828,050.00), Richard R Deluca ($4,556,870.20), and Robert M Davis ($5,599,109.36). How much insider selling is happening at Merck & Co., Inc.? Insiders have sold a total of 335,413 Merck & Co., Inc. shares in the last 24 months for a total of $39,564,064.41 sold. Which members of congress are trading Merck & Co., Inc.? Ro Khanna (D-CA), Josh Gottheimer (D-NJ), Gilbert Ray Cisneros, Jr. (D-CA), Marjorie Taylor Greene (R-GA), Lisa C. McClain (R-MI), Julie Johnson (D-TX), and Michael T. McCaul (R-TX) have bought shares of Merck & Co., Inc. in the last year totaling $252,500. Michael T. McCaul (R-TX), Julie Johnson (D-TX), Ro Khanna (D-CA), Val T. Hoyle (D-OR), Lisa C. McClain (R-MI), Ritchie Torres (D-NY), C. Scott Franklin (R-FL), and Gilbert Ray Cisneros, Jr. (D-CA) have sold shares totaling $395,000. Merck & Co., Inc. Active InsidersDavid Michael WilliamsExecutive vice president, chief information & digital officer1 recent tradesCaroline LitchfieldCFO1 recent tradesRobert M Davis (Age 58)CFO1 recent tradesWendell P WeeksDirectorInge G ThulinDirectorJulie L Gerberding (Age 71)EVPFrank ClyburnEVPRichard R DelucaEVP1 recent tradesClark GolestaniEVPMichael J. HolstonEVPSteven Mizell (Age 66)EVPJennifer Zachary (Age 47)EVP1 recent tradesAshley WatsonSVPDalton E Smart III (Age 59)SVP1 recent tradesRita A KarachunVPDean Y Li (Age 62)VP1 recent tradesKenneth C Frazier (Age 71)InsiderSanat Chattopadhyay (Age 66)InsiderJohannes Jacobus OosthuizenInsider1 recent tradesJoseph RomanelliInsiderCristal N DowningInsiderChirfi GuindoCMO2 recent trades More Insider Trading Tools from MarketBeat Related Companies Amgen Insider Selling Gilead Sciences Insider Selling Moderna Insider Selling Vertex Pharmaceuticals Insider Selling AbbVie Insider Selling Astrazeneca Insider Selling Bristol Myers Squibb Insider Selling Johnson & Johnson Insider Selling Eli Lilly and Company Insider Selling Pfizer 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 Latest Articles 3 Dividend Stocks With Insiders Buying in 2026Insider Buying Says Upstart Isn’t Down for the CountInsider Trades: Okta and Abbott See Buys, Micron Insiders SellMarketBeat Week in Review – 05/04 - 05/08BlackBerry Rewrites Its Own Operating System This page (NYSE:MRK) was last updated on 5/19/2026 by MarketBeat.com Staff. 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