SEC Form 4 · Updated Daily

MRK

— MERCK & CO., INC. Ownership

Insider and institutional ownership derived from SEC Form 4 filings. Click any owner to see their holdings across every company they’ve filed on, and how their position has changed over time.

FinancialsOwnership

Current Reporting Owners

OwnerRoleShares OwnedAs OfLast Activity
DeLuca Richard R.Officer110,167.072026-08-12S
Williams David MichaelOfficer66,421.0372026-08-05M
Zachary JenniferOfficer45,509.2542026-08-12S
Guindo ChirfiOfficer36,613.1272026-08-13S
Maraldo David R.Officer20,898.4342026-08-05M
Chattopadhyay SanatOfficer15,3472026-04-29F
Smart Dalton E. IIIOfficer9,388.3152026-05-02F

Recent Filings

DateOwnerActivitySharesPriceOwned After
2026-08-13Guindo ChirfiOpen-market sale10,000$135.0036,613.127
2026-08-12DeLuca Richard R.Open-market sale600$132.04110,167.07
2026-08-12DeLuca Richard R.Open-market sale11,099$131.61110,767.07
2026-08-12Zachary JenniferOption exercise (derivative)41,494$0.000
2026-08-12Zachary JenniferOpen-market sale80,315$133.4645,509.254
2026-08-12Zachary JenniferOption exercise13,433$84.71125,824.254
2026-08-12Zachary JenniferOption exercise41,494$117.89112,391.254
2026-08-11DeLuca Richard R.Open-market sale5,427$132.35121,866.07
2026-08-11DeLuca Richard R.Open-market sale7,410$131.33127,293.07
2026-08-10DeLuca Richard R.Open-market sale20,784$130.43134,703.07
2026-08-06Guindo ChirfiOpen-market sale15,000$131.0046,613.127
2026-08-06DeLuca Richard R.Open-market sale300$131.02155,487.07
2026-08-06DeLuca Richard R.Open-market sale4,945$130.23155,787.07
2026-08-06DeLuca Richard R.Open-market sale805$131.02160,732.07
2026-08-05Williams David MichaelOption exercise (derivative)4,600$0.000
2026-08-05Williams David MichaelOption exercise34,705$73.7366,421.037
2026-08-05Williams David MichaelOption exercise13,542$75.3645,258.037
2026-08-05Williams David MichaelOpen-market sale4,600$128.7731,716.037
2026-08-05Williams David MichaelOption exercise4,600$77.6236,316.037
2026-08-05Maraldo David R.Option exercise (derivative)2,686$0.005,374
2026-08-05Maraldo David R.Option exercise (derivative)9,709$0.000
2026-08-05Maraldo David R.Option exercise (derivative)6,311$0.003,154
2026-08-05Maraldo David R.Option exercise2,686$84.7120,898.434
2026-08-05Maraldo David R.Option exercise9,709$87.1027,921.434
2026-08-05Maraldo David R.Open-market sale6,311$128.7218,212.434
2026-08-05Maraldo David R.Option exercise6,311$73.7324,523.434
2026-06-30Coe Mary EllenGrant / award (derivative)233.463$128.5031,999.102
2026-06-30Karsanbhai Surendralal LancaGrant / award (derivative)126.459$128.505,518.802
2026-06-30Seidman Christine EGrant / award (derivative)63.23$128.5021,291.269
2026-05-29BAKER DOUGLAS M JRGrant / award (derivative)1,853.1$118.7211,518.208
2026-05-29Craig Pamela J.Grant / award (derivative)1,853.1$118.7234,944.93
2026-05-29GLOCER THOMAS HGrant / award (derivative)1,853.1$118.72110,911.759
2026-05-29LAVIZZO-MOUREY RISA JGrant / award (derivative)1,853.1$118.7217,749.352
2026-05-29Mayo StephenGrant / award (derivative)1,853.1$118.7214,824.52
2026-05-29Rothman PaulGrant / award (derivative)1,853.1$118.7234,944.942
2026-05-29RUSSO PATRICIA FGrant / award (derivative)1,853.1$118.7262,390.752
2026-05-29Seidman Christine EGrant / award (derivative)1,853.1$118.7221,228.039
2026-05-29THULIN INGE GGrant / award (derivative)1,853.1$118.7227,469.711
2026-05-29Coe Mary EllenGrant / award (derivative)1,853.1$118.7231,765.639
2026-05-29Karsanbhai Surendralal LancaGrant / award (derivative)1,853.1$118.725,392.343

Source: SEC EDGAR Form 4 filings. For informational purposes only — not investment advice.