LIVE FROM THE DATABASETRANSACTIONS 362,430COMPANIES 5,763LATEST TRADE Oct 16UPDATED Oct 17, 12:31 AM
MRKCIK 0000310158

Merck & Co., Inc.

169 transactions by 27 insiders, from November 10, 2025 to September 30, 2026.

Transactions
16927 insiders
Bought · P
Nonenobody bought on the open market
Sold · S
$71.3Mopen market
Net
−$71.3Mnet selling

Officers and directors

People inside the company. What they do with their own shares is the reason this data exists.

InsiderTradesPlannedBoughtSold
Jennifer ZacharyGC20——$25.2M
David Michael WilliamsChief18——$7.4M
Dalton E. Smart IIICAO16——$766K
Richard R. DeLucaEVP15——$11.3M
David R. MaraldoEVP14——$2.4M
Chirfi GuindoEVP11——$8.2M
Dean Y. LiPres10——$3.0M
Caroline LitchfieldCFO9——$5.0M
Robert M. DavisCEO8——$5.6M
Betty D. LarsonChief8———
Johannes Jacobus OosthuizenEVP7——$1.8M
Christine E. SeidmanDir5———
Mary Ellen CoeDir5———
Sanat ChattopadhyayOfficer4———
Surendralal Lanca KarsanbhaiDir3———
Thomas H. GlocerDir3———
Brian FoardEVP3———
Stephen MayoDir1———
Kathy J. WardenDir1———
Cristal N. DowningChief1——$616K
Inge G. ThulinDir1———
Joseph RomanelliPres1———
Patricia F. RussoDir1———
Risa J. Lavizzo-MoureyDir1———
Pamela J. CraigDir1———

All transactions

169 in total, newest filings first.

InsiderDateCodeSharesPriceValue
Christine E. SeidmanDirDERIVSep 30A56$145.31$8K?
Surendralal Lanca KarsanbhaiDirDERIVSep 30A112$145.31$16K?
Mary Ellen CoeDirDERIVSep 30A206$145.31$30K?
Jennifer ZacharyGCDERIVAug 12M13,433$0.00—?
Jennifer ZacharyGCDERIVAug 12M41,494$0.00—?
Jennifer ZacharyGCAug 12S80,315$133.46$10.7M
Jennifer ZacharyGCAug 12M13,433$84.71$1.1M
Jennifer ZacharyGCAug 12M41,494$117.89$4.9M
Chirfi GuindoEVPAug 13S10,000$135.00$1.4M
Richard R. DeLucaEVPAug 12S600$132.04$79K
Richard R. DeLucaEVPAug 12S11,099$131.61$1.5M
Richard R. DeLucaEVPAug 11S5,427$132.35$718K
Richard R. DeLucaEVPAug 11S7,410$131.33$973K
Richard R. DeLucaEVPAug 10S20,784$130.43$2.7M
Richard R. DeLucaEVPAug 6S300$131.02$39K
Richard R. DeLucaEVPAug 6S4,945$130.23$644K
Richard R. DeLucaEVPAug 6S805$131.02$105K
David Michael WilliamsChiefDERIVAug 5M34,705$0.00—?
David Michael WilliamsChiefDERIVAug 5M13,542$0.00—?
David Michael WilliamsChiefDERIVAug 5M4,600$0.00—?
David Michael WilliamsChiefAug 5S34,705$128.77$4.5M
David Michael WilliamsChiefAug 5M34,705$73.73$2.6M
David Michael WilliamsChiefAug 5S13,542$128.77$1.7M
David Michael WilliamsChiefAug 5M13,542$75.36$1.0M
David Michael WilliamsChiefAug 5S4,600$128.77$592K
David Michael WilliamsChiefAug 5M4,600$77.62$357K
David R. MaraldoEVPDERIVAug 5M2,686$0.00—?
David R. MaraldoEVPDERIVAug 5M9,709$0.00—?
David R. MaraldoEVPDERIVAug 5M6,311$0.00—?
David R. MaraldoEVPAug 5S2,686$128.72$346K
David R. MaraldoEVPAug 5M2,686$84.71$228K
David R. MaraldoEVPAug 5S9,709$128.72$1.2M
David R. MaraldoEVPAug 5M9,709$87.10$846K
David R. MaraldoEVPAug 5S6,311$128.72$812K
David R. MaraldoEVPAug 5M6,311$73.73$465K
Chirfi GuindoEVPAug 6S15,000$131.00$2.0M
Christine E. SeidmanDirDERIVJun 30A63$128.50$8K?
Surendralal Lanca KarsanbhaiDirDERIVJun 30A126$128.50$16K?
Mary Ellen CoeDirDERIVJun 30A233$128.50$30K?
Kathy J. WardenDirDERIVMay 29A1,853$118.72$220K?
Inge G. ThulinDirDERIVMay 29A1,853$118.72$220K?
Christine E. SeidmanDirDERIVMay 29A1,853$118.72$220K?
Patricia F. RussoDirDERIVMay 29A1,853$118.72$220K?
Paul RothmanDirDERIVMay 29A1,853$118.72$220K?
Stephen MayoDirDERIVMay 29A1,853$118.72$220K?
Risa J. Lavizzo-MoureyDirDERIVMay 29A1,853$118.72$220K?
Surendralal Lanca KarsanbhaiDirDERIVMay 29A1,853$118.72$220K?
Thomas H. GlocerDirDERIVMay 29A1,853$118.72$220K?
Pamela J. CraigDirDERIVMay 29A1,853$118.72$220K?
Mary Ellen CoeDirDERIVMay 29A1,853$118.72$220K?
Douglas M. Baker Jr.DirDERIVMay 29A1,853$118.72$220K?
Jennifer ZacharyGCDERIVMay 5A35,312$0.00—?
Jennifer ZacharyGCDERIVMay 5A12,064$0.00—?
David Michael WilliamsChiefDERIVMay 5A13,582$0.00—?
David Michael WilliamsChiefDERIVMay 5A4,640$0.00—?
Johannes Jacobus OosthuizenEVPDERIVMay 5A31,044$0.00—?
Johannes Jacobus OosthuizenEVPDERIVMay 5A10,605$0.00—?
Dalton E. Smart IIICAODERIVMay 5A5,045$0.00—?
Dalton E. Smart IIICAODERIVMay 5A2,298$0.00—?
David R. MaraldoEVPDERIVMay 5A21,731$0.00—?
David R. MaraldoEVPDERIVMay 5A7,424$0.00—?
Caroline LitchfieldCFODERIVMay 5A46,566$0.00—?
Caroline LitchfieldCFODERIVMay 5A15,908$0.00—?
Dean Y. LiPresDERIVMay 5A58,207$0.00—?
Dean Y. LiPresDERIVMay 5A19,885$0.00—?
Betty D. LarsonChiefDERIVMay 5A23,283$0.00—?
Betty D. LarsonChiefDERIVMay 5A7,954$0.00—?
Chirfi GuindoEVPDERIVMay 5A19,402$0.00—?
Chirfi GuindoEVPDERIVMay 5A6,628$0.00—?
Brian FoardEVPDERIVMay 5A31,044$0.00—?
Brian FoardEVPDERIVMay 5A35,351$0.00—?
Brian FoardEVPDERIVMay 5A10,605$0.00—?
Richard R. DeLucaEVPDERIVMay 5A34,924$0.00—?
Richard R. DeLucaEVPDERIVMay 5A11,931$0.00—?
Robert M. DavisCEODERIVMay 5A139,697$0.00—?
Robert M. DavisCEODERIVMay 5A47,724$0.00—?
Dalton E. Smart IIICAODERIVMay 2M383$0.00—?
Dalton E. Smart IIICAOMay 2F132$112.16$15K
Dalton E. Smart IIICAOMay 2M383$112.16$43K
David R. MaraldoEVPDERIVMay 2M552$0.00—?
David R. MaraldoEVPMay 2F159$112.16$18K
David R. MaraldoEVPMay 2M552$112.16$62K
David Michael WilliamsChiefDERIVApr 29M1,377$0.00—?
David Michael WilliamsChiefApr 29F679$110.03$75K
David Michael WilliamsChiefApr 29M1,377$110.03$152K
Dalton E. Smart IIICAODERIVApr 30M464$0.00—?
Dalton E. Smart IIICAODERIVApr 29M944$0.00—?
Dalton E. Smart IIICAOApr 30F159$110.95$18K
Dalton E. Smart IIICAOApr 30M464$110.95$51K
Dalton E. Smart IIICAOApr 29F324$110.03$36K
Dalton E. Smart IIICAOApr 29M944$110.03$104K
Jennifer ZacharyGCDERIVApr 29M2,951$0.00—?
Jennifer ZacharyGCApr 29F1,454$110.03$160K
Jennifer ZacharyGCApr 29M2,951$110.03$325K
Johannes Jacobus OosthuizenEVPDERIVApr 29M1,377$0.00—?
Johannes Jacobus OosthuizenEVPApr 29F679$110.03$75K
Johannes Jacobus OosthuizenEVPApr 29M1,377$110.03$152K
Caroline LitchfieldCFODERIVApr 29M3,935$0.00—?
Caroline LitchfieldCFOApr 29F1,938$110.03$213K
Caroline LitchfieldCFOApr 29M3,935$110.03$433K
Dean Y. LiPresDERIVApr 29M4,722$0.00—?
Dean Y. LiPresApr 29F2,326$110.03$256K
Dean Y. LiPresApr 29M4,722$110.03$520K
Betty D. LarsonChiefDERIVApr 30M11,350$0.00—?
Betty D. LarsonChiefDERIVApr 29M2,085$0.00—?
Betty D. LarsonChiefApr 30F5,143$110.95$571K
Betty D. LarsonChiefApr 30M11,350$110.95$1.3M
Betty D. LarsonChiefApr 29F715$110.03$79K
Betty D. LarsonChiefApr 29M2,085$110.03$229K
Chirfi GuindoEVPDERIVApr 29M1,967$0.00—?
Chirfi GuindoEVPApr 29F969$110.03$107K
Chirfi GuindoEVPApr 29M1,967$110.03$216K
Richard R. DeLucaEVPDERIVApr 29M2,518$0.00—?
Richard R. DeLucaEVPApr 29F1,241$110.03$137K
Richard R. DeLucaEVPApr 29M2,518$110.03$277K
Robert M. DavisCEODERIVApr 29M13,300$0.00—?
Robert M. DavisCEOApr 29F6,551$110.03$721K
Robert M. DavisCEOApr 29M13,300$110.03$1.5M
Sanat ChattopadhyayOfficerDERIVApr 29M2,597$0.00—?
Sanat ChattopadhyayOfficerApr 29F1,130$110.03$124K
Sanat ChattopadhyayOfficerApr 29M2,597$110.03$286K
Christine E. SeidmanDirDERIVMar 31A68$120.29$8K?
Thomas H. GlocerDirDERIVMar 31A405$120.29$49K?
Mary Ellen CoeDirDERIVMar 31A249$120.29$30K?
Chirfi GuindoChiefFeb 12S10,000$121.46$1.2M
Dean Y. LiPresFeb 10S10,235$117.52$1.2M
Jennifer ZacharyGCDERIVFeb 9M38,835$0.00—?
Jennifer ZacharyGCDERIVFeb 9M56,792$0.00—?
Jennifer ZacharyGCDERIVFeb 9M25,946$0.00—?
Jennifer ZacharyGCFeb 9S38,835$119.15$4.6M
Jennifer ZacharyGCFeb 9M38,835$119.15$4.6M
Jennifer ZacharyGCFeb 9S56,792$119.15$6.8M
Jennifer ZacharyGCFeb 9M56,792$119.15$6.8M
Jennifer ZacharyGCFeb 9S25,946$119.15$3.1M
Jennifer ZacharyGCFeb 9M25,946$119.15$3.1M
Chirfi GuindoChiefFeb 9S10,000$118.41$1.2M
David Michael WilliamsChiefDERIVFeb 6M5,000$0.00—?
David Michael WilliamsChiefFeb 6S5,000$121.91$610K
David Michael WilliamsChiefFeb 6M5,000$77.62$388K
Dalton E. Smart IIICAODERIVFeb 4M4,000$0.00—?
Dalton E. Smart IIICAOFeb 4S2,400$119.68$287K
Dalton E. Smart IIICAOFeb 4S4,000$119.68$479K
Dalton E. Smart IIICAOFeb 4M4,000$62.07$248K
Johannes Jacobus OosthuizenPresFeb 6S15,000$121.87$1.8M
Caroline LitchfieldCFODERIVFeb 4M41,997$0.00—?
Caroline LitchfieldCFOFeb 4S41,997$119.61$5.0M
Caroline LitchfieldCFOFeb 4M41,997$53.06$2.2M
Dean Y. LiPresDERIVFeb 4M15,087$0.00—?
Dean Y. LiPresFeb 4S15,087$118.77$1.8M
Dean Y. LiPresFeb 4M15,087$56.04$845K
Chirfi GuindoChiefFeb 5S20,000$121.88$2.4M
Richard R. DeLucaEVPFeb 6S37,685$120.92$4.6M
Robert M. DavisCEOFeb 4S32,462$118.35$3.8M
Robert M. DavisCEOFeb 4S14,972$117.38$1.8M
Jennifer ZacharyGCJan 26A11,583$107.40$1.2M
David Michael WilliamsChiefJan 26A6,112$107.40$656K
Dalton E. Smart IIICAOJan 26A1,066$107.40$114K
Joseph RomanelliPresJan 26A5,703$107.40$613K
Johannes Jacobus OosthuizenPresJan 26A5,026$107.40$540K
Caroline LitchfieldCFOJan 26A15,852$107.40$1.7M
Dean Y. LiPresJan 26A20,469$107.40$2.2M
Chirfi GuindoChiefJan 26A9,865$107.40$1.1M
Richard R. DeLucaEVPJan 26A12,264$107.40$1.3M
Robert M. DavisCEOJan 26A47,434$107.40$5.1M
Sanat ChattopadhyayOfficerJan 26A13,880$107.40$1.5M
Christine E. SeidmanDirDERIVDec 31A77$105.26$8K?
Thomas H. GlocerDirDERIVDec 31A463$105.26$49K?
Mary Ellen CoeDirDERIVDec 31A285$105.26$30K?
Cristal N. DowningChiefNov 10S7,085$87.00$616K