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Merck & Co., Inc. planned insider sales

In the twelve months since 23 September 2025 insiders at Merck & Co., Inc. filed 22 Form 144 notices of planned sales, 584,348 shares worth $72.0 million at the time of filing, from 14 sellers. The latest, filed 13 August 2026: Chirfi Guindo (officer), 10,000 shares worth $1.4 million, planned for around 13 August 2026 through Morgan Stanley Smith Barney LLC Executive Financial Services.

FiledSellerRelationshipSharesValuePlanned saleBrokerHow acquiredFiling
13 August 2026Chirfi GuindoOfficer10,000$1.4 million13 August 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted Stock Vesting Under a Registered PlanForm 144
12 August 2026Richard Robert Deluca JrOfficer11,699$1.5 million12 August 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted Stock Vesting Under a Registered PlanForm 144
12 August 2026Jennifer L ZacharyOfficer80,315$10.7 million12 August 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesExercise of Options Under a Registered Plan; Restricted Stock Vesting Under a Registered PlanForm 144
11 August 2026Richard Robert Deluca JrOfficer12,837$1.7 million11 August 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted Stock Vesting Under a Registered PlanForm 144
10 August 2026Richard Robert Deluca JrOfficer20,784$2.7 million10 August 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted Stock Vesting Under a Registered PlanForm 144
6 August 2026Richard Robert Deluca JrOfficer6,050$788,7736 August 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted Stock Vesting Under a Registered PlanForm 144
6 August 2026Chirfi GuindoOfficer15,000$2.0 million6 August 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted Stock Vesting Under a Registered PlanForm 144
5 August 2026David MaraldoOfficer18,706$2.4 million5 August 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesExercise of Options Under a Registered PlanForm 144
5 August 2026David M WilliamsOfficer52,847$6.8 million5 August 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesExercise of Options Under a Registered PlanForm 144
10 February 2026Dean LiOfficer10,235$1.2 million10 February 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted stock vesting under a registered planForm 144
9 February 2026Chirfi GuindoOfficer20,000$2.4 million9 February 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted stock vesting under a registered planForm 144
9 February 2026Jennifer ZacharyOfficer121,573$14.5 million9 February 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesExercise of options under a registered planForm 144
6 February 2026David WilliamsOfficer5,000$609,5256 February 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesExercise of options under a registered planForm 144
6 February 2026Johannes Jacobus OosthuizenOfficer15,000$1.8 million6 February 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesPrivate Acquisition from Issuer/Affiliate; Restricted stock vesting under a registered planForm 144
6 February 2026Richard Robert Deluca Jr.Officer37,685$4.6 million6 February 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted stock vesting under a registered planForm 144
5 February 2026Chirfi GuindoOfficer20,000$2.4 million5 February 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted stock vesting under a registered planForm 144
4 February 2026Dalton SmartOfficer6,400$765,9204 February 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesExercise of options under a registered plan; Restricted stock vesting under a registered planForm 144
4 February 2026Dean LiOfficer15,087$1.8 million4 February 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesExercise of options under a registered planForm 144
4 February 2026Caroline A LitchfieldOfficer41,997$5.0 million4 February 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesExercise of options under a registered planForm 144
4 February 2026Robert M. DavisOfficer47,434$5.6 million4 February 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted stock vesting under a registered planForm 144
10 November 2025Cristal DowningOfficer7,085$616,39510 November 2025Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted stock vesting under a registered planForm 144
3 November 2025David WilliamsOfficer8,614$720,0403 November 2025Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted stock vesting under a registered planForm 144

A Form 144 is the notice an insider files with the SEC before selling restricted or control shares over the Rule 144 thresholds; it says what may be sold, not what was. Value is the filer's own aggregate market value. Whether the sale happened shows up later on Form 4, on the insiders page.

Source

Form 144 filings on EDGAR for Merck & Co., Inc.: the company's filing index, each notice read from its own XML.

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