The Filings Report

Merck insider trading

MRKfinancial statementsForm 4 filings on EDGAR129 transactions since Nov 1, 2024

From August 4, 2026 to November 1, 2026, 0 insiders at Merck bought $0 of stock in the open market, and 5 sold $30M. Officers and directors accounted for $0 of purchases and $30M of sales. The last reported transaction was an open-market sale by Guindo Chirfi on August 13, 2026.

The answer card and chart use the same period. Change the range above the chart to update both. Form 4 filings through August 13, 2026; awards, option exercises, tax withholding and gifts are excluded from these totals.

Stock price and insider activity

Daily price candles with insider purchases and sales directly beneath them on the same timeline. Bars show individual days; totals sum all days in the selected period.

MRK daily priceSplit-adjusted prices in US dollars

Bought $0Sold $30MAug 4, 2026 – Nov 1, 2026

Oct 30, 2026O $149.55 · H $151.35 · L $147.40 · C $149.52Bought $0 (0)Sold $0 (0)
$124$133$142$150$1592026-08-04: open $128.46, high $129.99, low $126.22, close $128.002026-08-05: open $129.41, high $131.09, low $127.56, close $128.322026-08-06: open $130.96, high $131.08, low $127.80, close $128.342026-08-07: open $127.84, high $128.75, low $126.68, close $128.582026-08-10: open $128.29, high $130.98, low $128.24, close $130.922026-08-11: open $129.93, high $132.84, low $129.70, close $130.452026-08-12: open $130.25, high $134.06, low $128.91, close $132.922026-08-13: open $133.86, high $135.68, low $133.06, close $135.552026-08-14: open $134.43, high $135.97, low $133.40, close $135.842026-08-17: open $134.95, high $137.17, low $134.55, close $135.972026-08-18: open $137.24, high $137.98, low $134.88, close $135.172026-08-19: open $146.94, high $153.50, low $144.90, close $152.202026-08-20: open $150.78, high $152.52, low $148.52, close $148.992026-08-21: open $149.12, high $154.49, low $148.59, close $152.552026-08-24: open $150.72, high $151.52, low $149.14, close $150.692026-08-25: open $151.00, high $156.92, low $150.66, close $156.452026-08-26: open $154.35, high $155.19, low $152.61, close $153.152026-08-27: open $149.53, high $152.08, low $149.02, close $149.542026-08-28: open $146.72, high $149.01, low $145.75, close $148.242026-08-31: open $147.00, high $148.69, low $145.95, close $147.762026-09-01: open $150.23, high $151.68, low $148.55, close $149.862026-09-02: open $151.50, high $152.69, low $149.97, close $151.642026-09-03: open $152.80, high $152.80, low $148.90, close $152.342026-09-04: open $150.83, high $152.22, low $150.09, close $150.332026-09-08: open $148.41, high $149.60, low $146.28, close $148.492026-09-09: open $148.96, high $149.41, low $147.18, close $147.602026-09-10: open $147.94, high $148.00, low $144.10, close $144.712026-09-11: open $145.52, high $145.90, low $143.68, close $143.942026-09-14: open $146.42, high $147.09, low $144.10, close $144.862026-09-15: open $143.85, high $144.15, low $142.32, close $143.792026-09-16: open $143.96, high $144.97, low $143.50, close $144.912026-09-17: open $145.74, high $147.65, low $145.32, close $147.152026-09-18: open $147.08, high $147.84, low $145.74, close $146.872026-09-21: open $146.79, high $150.49, low $145.60, close $149.502026-09-22: open $148.69, high $153.57, low $148.04, close $150.912026-09-23: open $151.32, high $152.01, low $146.89, close $148.082026-09-24: open $148.17, high $151.46, low $147.90, close $148.032026-09-25: open $148.06, high $149.98, low $147.48, close $148.782026-09-28: open $147.65, high $149.19, low $146.28, close $148.782026-09-29: open $148.17, high $150.36, low $146.09, close $149.282026-09-30: open $148.95, high $149.27, low $145.26, close $145.312026-10-01: open $144.71, high $145.39, low $143.26, close $143.812026-10-02: open $143.77, high $144.35, low $142.73, close $144.302026-10-05: open $143.67, high $144.06, low $138.80, close $139.542026-10-06: open $140.13, high $142.16, low $139.74, close $141.942026-10-07: open $142.03, high $144.15, low $141.49, close $142.792026-10-08: open $141.90, high $142.77, low $138.89, close $142.402026-10-09: open $141.37, high $146.68, low $141.36, close $145.602026-10-12: open $145.75, high $146.36, low $144.64, close $145.452026-10-13: open $145.85, high $145.93, low $141.58, close $141.992026-10-14: open $143.10, high $148.16, low $142.66, close $147.372026-10-15: open $149.70, high $152.34, low $144.91, close $145.192026-10-16: open $146.96, high $147.80, low $145.61, close $145.952026-10-19: open $145.00, high $147.41, low $143.53, close $143.652026-10-20: open $146.29, high $149.36, low $146.12, close $148.302026-10-21: open $147.11, high $150.00, low $147.11, close $149.882026-10-22: open $151.05, high $154.02, low $144.07, close $147.292026-10-23: open $145.02, high $145.44, low $143.41, close $145.272026-10-26: open $145.89, high $146.61, low $139.93, close $140.612026-10-27: open $140.22, high $142.69, low $139.83, close $141.822026-10-28: open $140.00, high $142.40, low $139.21, close $140.932026-10-29: open $144.62, high $149.26, low $143.32, close $146.332026-10-30: open $149.55, high $151.35, low $147.40, close $149.52Insider purchases / sales · USD$20M$0−$20M2026-08-05: 0 purchases ($0), 6 sales ($9M)2026-08-06: 0 purchases ($0), 4 sales ($3M)2026-08-10: 0 purchases ($0), 1 sales ($3M)2026-08-11: 0 purchases ($0), 2 sales ($2M)2026-08-12: 0 purchases ($0), 3 sales ($12M)2026-08-13: 0 purchases ($0), 1 sales ($1M)Aug 4Aug 26Sep 17Oct 9Oct 30

purchases above zero; sales below. Both use the transaction date and the same dollar scale. Hover, tap, or use arrow keys to inspect a date. Awards, exercises, tax withholding and gifts are excluded.

Dates with prices or insider activity are spaced evenly; empty weekends and holidays are omitted. Prices through Oct 30, 2026. Insider data through Nov 1, 2026. Prices are adjusted for splits; transaction values are reported dollars.

Every transaction

129 transactions from November 1, 2024 to November 1, 2026, newest first. Open-market purchases and sales are coloured; awards, exercises, tax withholding and gifts are grey and not counted.

TradedInsiderRoleTransactionSharesPriceValueHeld afterFiled
Aug 13, 2026Guindo ChirfiEVP, Access, Policy & Commsopen-market sale10,000$135.00$1M36,613Aug 13, 2026
Aug 12, 2026Zachary JenniferEVP, General Counseloption exercise41,494$117.89$5M112,391Aug 13, 2026
Aug 12, 2026Zachary JenniferEVP, General Counseloption exercise13,433$84.71$1M125,824Aug 13, 2026
Aug 12, 2026Zachary JenniferEVP, General Counselopen-market sale80,315$133.46$11M45,509Aug 13, 2026
Aug 12, 2026DeLuca Richard R.EVP&Pres, Merck Animal Heallthopen-market sale11,099$131.61$1M110,767Aug 12, 2026
Aug 12, 2026DeLuca Richard R.EVP&Pres, Merck Animal Heallthopen-market sale600$132.04$79K110,167Aug 12, 2026
Aug 11, 2026DeLuca Richard R.EVP&Pres, Merck Animal Heallthopen-market sale7,410$131.33$973K127,293Aug 12, 2026
Aug 11, 2026DeLuca Richard R.EVP&Pres, Merck Animal Heallthopen-market sale5,427$132.35$718K121,866Aug 12, 2026
Aug 10, 2026DeLuca Richard R.EVP&Pres, Merck Animal Heallthopen-market sale20,784$130.43$3M134,703Aug 12, 2026
Aug 6, 2026DeLuca Richard R.EVP&Pres, Merck Animal Heallthopen-market sale805$131.02$105K160,732Aug 10, 2026
Aug 6, 2026DeLuca Richard R.EVP&Pres, Merck Animal Heallthopen-market sale4,945$130.23$644K155,787Aug 10, 2026
Aug 6, 2026DeLuca Richard R.EVP&Pres, Merck Animal Heallthopen-market sale300$131.02$39K155,487Aug 10, 2026
Aug 6, 2026Guindo ChirfiEVP, Access, Policy & Commsopen-market sale15,000$131.00$2M46,613Aug 7, 2026
Aug 5, 2026Maraldo David R.EVP & Pres. MMDoption exercise6,311$73.73$465K24,523Aug 7, 2026
Aug 5, 2026Maraldo David R.EVP & Pres. MMDopen-market sale6,311$128.72$812K18,212Aug 7, 2026
Aug 5, 2026Maraldo David R.EVP & Pres. MMDoption exercise9,709$87.10$846K27,921Aug 7, 2026
Aug 5, 2026Maraldo David R.EVP & Pres. MMDopen-market sale9,709$128.72$1M18,212Aug 7, 2026
Aug 5, 2026Maraldo David R.EVP & Pres. MMDoption exercise2,686$84.71$228K20,898Aug 7, 2026
Aug 5, 2026Maraldo David R.EVP & Pres. MMDopen-market sale2,686$128.72$346K18,212Aug 7, 2026
Aug 5, 2026Williams David MichaelEVP,Chief Info&Digital Officeroption exercise4,600$77.62$357K36,316Aug 7, 2026
Aug 5, 2026Williams David MichaelEVP,Chief Info&Digital Officeropen-market sale4,600$128.77$592K31,716Aug 7, 2026
Aug 5, 2026Williams David MichaelEVP,Chief Info&Digital Officeroption exercise13,542$75.36$1M45,258Aug 7, 2026
Aug 5, 2026Williams David MichaelEVP,Chief Info&Digital Officeropen-market sale13,542$128.77$2M31,716Aug 7, 2026
Aug 5, 2026Williams David MichaelEVP,Chief Info&Digital Officeroption exercise34,705$73.73$3M66,421Aug 7, 2026
Aug 5, 2026Williams David MichaelEVP,Chief Info&Digital Officeropen-market sale34,705$128.77$4M31,716Aug 7, 2026
May 2, 2026Smart Dalton E. IIISVP Fin. - Global Controlleroption exercise383$112.16$43K9,520May 5, 2026
May 2, 2026Smart Dalton E. IIISVP Fin. - Global Controllertax withholding132$112.16$15K9,388May 5, 2026
May 2, 2026Maraldo David R.EVP & Pres. MMDoption exercise552$112.16$62K18,371May 5, 2026
May 2, 2026Maraldo David R.EVP & Pres. MMDtax withholding159$112.16$18K18,212May 5, 2026
Apr 30, 2026Smart Dalton E. IIISVP Fin. - Global Controlleroption exercise464$110.95$51K9,296May 1, 2026
Apr 30, 2026Smart Dalton E. IIISVP Fin. - Global Controllertax withholding159$110.95$18K9,137May 1, 2026
Apr 30, 2026Larson Betty DEVP, Chief HR Officeroption exercise11,350$110.95$1M18,917May 1, 2026
Apr 30, 2026Larson Betty DEVP, Chief HR Officertax withholding5,143$110.95$571K13,774May 1, 2026
Apr 29, 2026Guindo ChirfiEVP, Access, Policy & Commsoption exercise1,967$110.03$216K62,582May 1, 2026
Apr 29, 2026Guindo ChirfiEVP, Access, Policy & Commstax withholding969$110.03$107K61,613May 1, 2026
Apr 29, 2026Chattopadhyay SanatExe V-P & Pres. MMDoption exercise2,597$110.03$286K16,477May 1, 2026
Apr 29, 2026Chattopadhyay SanatExe V-P & Pres. MMDtax withholding1,130$110.03$124K15,347May 1, 2026
Apr 29, 2026DeLuca Richard R.EVP&Pres, Merck Animal Heallthoption exercise2,518$110.03$277K162,778May 1, 2026
Apr 29, 2026DeLuca Richard R.EVP&Pres, Merck Animal Heallthtax withholding1,241$110.03$137K161,537May 1, 2026
Apr 29, 2026Williams David MichaelEVP,Chief Info&Digital Officeroption exercise1,377$110.03$152K32,395May 1, 2026
Apr 29, 2026Williams David MichaelEVP,Chief Info&Digital Officertax withholding679$110.03$75K31,716May 1, 2026
Apr 29, 2026Smart Dalton E. IIISVP Fin. - Global Controlleroption exercise944$110.03$104K9,156May 1, 2026
Apr 29, 2026Smart Dalton E. IIISVP Fin. - Global Controllertax withholding324$110.03$36K8,832May 1, 2026
Apr 29, 2026Li Dean YExecutive VP & President, MRLoption exercise4,722$110.03$520K96,757May 1, 2026
Apr 29, 2026Li Dean YExecutive VP & President, MRLtax withholding2,326$110.03$256K94,431May 1, 2026
Apr 29, 2026Zachary JenniferEVP, General Counseloption exercise2,951$110.03$325K72,351May 1, 2026
Apr 29, 2026Zachary JenniferEVP, General Counseltax withholding1,454$110.03$160K70,897May 1, 2026
Apr 29, 2026Larson Betty DEVP, Chief HR Officeroption exercise2,085$110.03$229K8,282May 1, 2026
Apr 29, 2026Larson Betty DEVP, Chief HR Officertax withholding715$110.03$79K7,567May 1, 2026
Apr 29, 2026Litchfield CarolineEVP & CFOoption exercise3,935$110.03$433K94,239May 1, 2026

Who the insiders are

Everyone who reported a transaction since November 1, 2024, by open-market value over twelve months. Shares held are after the insider’s latest directly held transaction.

InsiderRoleLast transactionKindShares heldBought, 12 monthsSold, 12 monthsSales under a plan
Zachary JenniferEVP, General CounselAug 12, 2026option exercise112,391—$25M (4)0 of 4
DeLuca Richard R.EVP&Pres, Merck Animal HeallthAug 12, 2026open-market sale110,767—$11M (9)0 of 9
Guindo ChirfiEVP, Access, Policy & CommsAug 13, 2026open-market sale36,613—$8M (5)0 of 5
Williams David MichaelEVP,Chief Info&Digital OfficerAug 5, 2026option exercise36,316—$8M (5)0 of 5
Davis Robert MChairman, CEO & President, DirectorApr 29, 2026option exercise456,902—$6M (2)0 of 2
Litchfield CarolineEVP & CFOApr 29, 2026option exercise94,239—$5M (1)0 of 1
Li Dean YExecutive VP & President, MRLApr 29, 2026option exercise96,757—$3M (2)0 of 2
Maraldo David R.EVP & Pres. MMDAug 5, 2026option exercise24,523—$2M (3)0 of 3
Oosthuizen Johannes JacobusEVP, Oncology & Int?lApr 29, 2026option exercise22,574—$2M (1)0 of 1
Smart Dalton E. IIISVP Fin. - Global ControllerMay 2, 2026option exercise9,520—$766K (2)0 of 2
Downing Cristal NChief Comm. & Public Afrs OfcrNov 10, 2025open-market sale0—$616K (1)0 of 1
Larson Betty DEVP, Chief HR OfficerApr 30, 2026option exercise18,917———
Romanelli JosephPresident, Human Health Int?lJan 26, 2026award28,739———
Chattopadhyay SanatExe V-P & Pres. MMDApr 29, 2026option exercise16,477———
Thulin Inge GDirectorFeb 6, 2025open-market buy2,933———
Baker Douglas M JRDirectorFeb 5, 2025open-market buy16,000———
Smart DaltonSVP Fin. - Global ControllerJan 27, 2025award7,014———

Questions

Are Merck insiders buying or selling?

Over the twelve months to November 1, 2026, 11 insiders at Merck sold $72M of stock in the open market, all by officers and directors, and no insider bought. Net, insiders sold $72M. Only open-market purchases and sales are counted.

Who sold the most Merck stock in the last year?

Zachary Jennifer (EVP, General Counsel) sold $25M in 4 open-market sales over the twelve months to November 1, 2026.

Do Merck executives sell under 10b5-1 plans?

0 of the 35 open-market sales in the last twelve months (0%) were reported as made under a Rule 10b5-1 trading plan, set up in advance. A sale under a plan is still counted as a sale.

What counts as insider buying here?

Only open-market purchases (Form 4 code P) and sales (code S) by officers, directors and 10% owners. Stock awards, option exercises, shares withheld for tax and gifts are listed in the table but never counted as buying or selling.

More on Merck

From Form 4, 4/A and 5 filings with the SEC. A record of insider transactions, not a recommendation.