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81 filings · most recent first

MRK Form 4 Insider Filings

Over the trailing 90 days, MRK insiders sold a net $30.0M in discretionary open-market trades (5 sellers), across 36 Form 4 transactions by 8 insiders.

2026-08-13Guindo Chirfi Files Merck Co Mrk Form 4 August 13 2026 2026-08-13Zachary Jennifer Files Merck Co Mrk Form 4 August 12 2026 2026-08-12Deluca Richard R Files Merck Co Mrk Form 4 August 10 2026 2026-08-10Deluca Richard R Files Merck Co Mrk Form 4 August 06 2026 2026-08-07Maraldo David R Files Merck Co Mrk Form 4 August 05 2026 2026-08-07Williams David Michael Files Merck Co Mrk Form 4 August 05 2026 2026-08-07Guindo Chirfi Files Merck Co Mrk Form 4 August 06 2026 2026-07-01Seidman Christine E Files Merck Co Mrk Form 4 June 30 2026 2026-07-01Karsanbhai Surendralal Lanca Files Merck Co Mrk Form 4 June 30 2026 2026-07-01Coe Mary Ellen Files Merck Co Mrk Form 4 June 30 2026 2026-06-02Warden Kathy J Files Merck Co Mrk Form 4 May 29 2026 2026-06-02Karsanbhai Surendralal Lanca Files Merck Co Mrk Form 4 May 29 2026 2026-06-02Coe Mary Ellen Files Merck Co Mrk Form 4 May 29 2026 2026-06-02Thulin Inge G Files Merck Co Mrk Form 4 May 29 2026 2026-06-02Seidman Christine E Files Merck Co Mrk Form 4 May 29 2026 2026-06-02Russo Patricia F Files Merck Co Mrk Form 4 May 29 2026 2026-06-02Rothman Paul Files Merck Co Mrk Form 4 May 29 2026 2026-06-02Mayo Stephen Files Merck Co Mrk Form 4 May 29 2026 2026-06-02Lavizzomourey Risa J Files Merck Co Mrk Form 4 May 29 2026 2026-06-02Glocer Thomas H Files Merck Co Mrk Form 4 May 29 2026 2026-06-02Craig Pamela J Files Merck Co Mrk Form 4 May 29 2026 2026-06-02Baker Douglas M Jr Files Merck Co Mrk Form 4 May 29 2026 2026-05-07Zachary Jennifer Files Merck Co Mrk Form 4 May 05 2026 2026-05-07Williams David Michael Files Merck Co Mrk Form 4 May 05 2026 2026-05-07Litchfield Caroline Files Merck Co Mrk Form 4 May 05 2026 2026-05-07Li Dean Y Files Merck Co Mrk Form 4 May 05 2026 2026-05-07Larson Betty D Files Merck Co Mrk Form 4 May 05 2026 2026-05-07Deluca Richard R Files Merck Co Mrk Form 4 May 05 2026 2026-05-07Davis Robert M Files Merck Co Mrk Form 4 May 05 2026 2026-05-07Foard Brian Files Merck Co Mrk Form 4 May 05 2026 2026-05-07Maraldo David R Files Merck Co Mrk Form 4 May 05 2026 2026-05-07Oosthuizen Johannes Jacobus Files Merck Co Mrk Form 4 May 05 2026 2026-05-07Smart Dalton E Iii Files Merck Co Mrk Form 4 May 05 2026 2026-05-07Guindo Chirfi Files Merck Co Mrk Form 4 May 05 2026 2026-05-05Smart Dalton E Iii Files Merck Co Mrk Form 4 May 02 2026 2026-05-05Maraldo David R Files Merck Co Mrk Form 4 May 02 2026 2026-05-01Guindo Chirfi Files Merck Co Mrk Form 4 April 29 2026 2026-05-01Chattopadhyay Sanat Files Merck Co Mrk Form 4 April 29 2026 2026-05-01Deluca Richard R Files Merck Co Mrk Form 4 April 29 2026 2026-05-01Williams David Michael Files Merck Co Mrk Form 4 April 29 2026 2026-05-01Smart Dalton E Iii Files Merck Co Mrk Form 4 April 29 2026 2026-05-01Li Dean Y Files Merck Co Mrk Form 4 April 29 2026 2026-05-01Zachary Jennifer Files Merck Co Mrk Form 4 April 29 2026 2026-05-01Larson Betty D Files Merck Co Mrk Form 4 April 29 2026 2026-05-01Litchfield Caroline Files Merck Co Mrk Form 4 April 29 2026 2026-05-01Davis Robert M Files Merck Co Mrk Form 4 April 29 2026 2026-05-01Oosthuizen Johannes Jacobus Files Merck Co Mrk Form 4 April 29 2026 2026-04-01Seidman Christine E Files Merck Co Mrk Form 4 March 31 2026 2026-04-01Glocer Thomas H Files Merck Co Mrk Form 4 March 31 2026 2026-04-01Coe Mary Ellen Files Merck Co Mrk Form 4 March 31 2026 2026-02-12Guindo Chirfi Files Merck Co Mrk Form 4 February 12 2026 2026-02-10Li Dean Y Files Merck Co Mrk Form 4 February 10 2026 2026-02-09Guindo Chirfi Files Merck Co Mrk Form 4 February 09 2026 2026-02-09Zachary Jennifer Files Merck Co Mrk Form 4 February 09 2026 2026-02-06Williams David Michael Files Merck Co Mrk Form 4 February 06 2026 2026-02-06Smart Dalton E Iii Files Merck Co Mrk Form 4 February 04 2026 2026-02-06Oosthuizen Johannes Jacobus Files Merck Co Mrk Form 4 February 06 2026 2026-02-06Litchfield Caroline Files Merck Co Mrk Form 4 February 04 2026 2026-02-06Li Dean Y Files Merck Co Mrk Form 4 February 04 2026 2026-02-06Guindo Chirfi Files Merck Co Mrk Form 4 February 05 2026 2026-02-06Deluca Richard R Files Merck Co Mrk Form 4 February 06 2026 2026-02-06Davis Robert M Files Merck Co Mrk Form 4 February 04 2026 2026-01-28Zachary Jennifer Files Merck Co Mrk Form 4 January 26 2026 2026-01-28Williams David Michael Files Merck Co Mrk Form 4 January 26 2026 2026-01-28Smart Dalton E Iii Files Merck Co Mrk Form 4 January 26 2026 2026-01-28Romanelli Joseph Files Merck Co Mrk Form 4 January 26 2026 2026-01-28Oosthuizen Johannes Jacobus Files Merck Co Mrk Form 4 January 26 2026 2026-01-28Litchfield Caroline Files Merck Co Mrk Form 4 January 26 2026 2026-01-28Li Dean Y Files Merck Co Mrk Form 4 January 26 2026 2026-01-28Guindo Chirfi Files Merck Co Mrk Form 4 January 26 2026 2026-01-28Deluca Richard R Files Merck Co Mrk Form 4 January 26 2026 2026-01-28Davis Robert M Files Merck Co Mrk Form 4 January 26 2026 2026-01-28Chattopadhyay Sanat Files Merck Co Mrk Form 4 January 26 2026 2026-01-05Seidman Christine E Files Merck Co Mrk Form 4 December 31 2025 2026-01-05Glocer Thomas H Files Merck Co Mrk Form 4 December 31 2025 2026-01-05Coe Mary Ellen Files Merck Co Mrk Form 4 December 31 2025 2025-12-18Downing Cristal N Files Merck Co Mrk Form 4 November 10 2025 2025-12-18Williams David Michael Files Merck Co Mrk Form 4 November 03 2025 2025-12-18Seidman Christine E Files Merck Co Mrk Form 4 September 30 2025 2025-12-18Glocer Thomas H Files Merck Co Mrk Form 4 September 30 2025 2025-12-18Coe Mary Ellen Files Merck Co Mrk Form 4 September 30 2025

Most Active Insiders (Trailing 90 Days)

Zachary Jennifer · 5 txns−$4.7M Williams David Michael · 9 txns−$2.9M Deluca Richard R. · 8 txns−$6.7M Maraldo David R. · 9 txns−$869K Guindo Chirfi · 2 txns−$3.3M Coe Mary Ellen · 1 txn+$30K

Detected Clusters

Cluster selling: 3 insiders, $13.6M total, through Aug 19, 2026 — live cluster view →
Cluster selling: 3 insiders, $15.3M total, through Aug 18, 2026 — live cluster view →
Cluster selling: 3 insiders, $18.0M total, through Aug 17, 2026 — live cluster view →

MRK full research: price, insiders, financials →