Merck & Co., Inc. (MRK)

Latest Insider Confidence Score

2026Q1

43.0
Bearish

Company insider confidence (by quarter)

2017Q1 2026Q1

Largest shareholders

Insider Role (last 12 mo) Shares held Filed at
Merck & Co., Inc. 10% Owner 14,044,943 Dec 23, 2024
Merck Sharp & Dohme Llc 10% Owner 14,044,943 Dec 23, 2024
Frazier Kenneth C Chair 710,726.98 Aug 19, 2022
Davis Robert M CEO 443,601.76 May 1, 2025
Perlmutter Roger M Exe V-P & Pres, MRL 215,059.58 May 5, 2020

Recent buy/sell transactions

Exec date Filing date Insider Role Signal Confidence Shares % of shares Under plan? Amount (USD)
Feb 12, 2026 Feb 12, 2026 Guindo Chirfi Chief Marketing Officer Sell 17.5 -10,000 -14.16% ✗ $1.2M
Feb 10, 2026 Feb 10, 2026 Li Dean Y President Sell 17.5 -10,235 -10.01% ✗ $1.2M
Feb 9, 2026 Feb 9, 2026 Guindo Chirfi Chief Marketing Officer Sell 17.5 -10,000 -12.40% ✗ $1.2M
Feb 9, 2026 Feb 9, 2026 Zachary Jennifer EVP, General Counsel Sell 15.0 -121,573 -37.03% ✗ $14.5M
Feb 6, 2026 Feb 6, 2026 Williams David Michael EVP,Chief Info&Digital Officer Sell 20.0 -5,000 -13.95% ✗ $609.5K
Feb 4, 2026 Feb 6, 2026 Smart Dalton E. III SVP Fin. - Global Controller Sell 20.0 -6,400 -43.82% ✗ $765.9K
Feb 6, 2026 Feb 6, 2026 Oosthuizen Johannes Jacobus President Sell 17.5 -15,000 -41.44% ✗ $1.8M
Feb 4, 2026 Feb 6, 2026 Litchfield Caroline CFO Sell 16.3 -41,997 -31.77% ✗ $5M
Feb 4, 2026 Feb 6, 2026 Li Dean Y President Sell 17.5 -15,087 -12.86% ✗ $1.8M
Feb 5, 2026 Feb 6, 2026 Guindo Chirfi Chief Marketing Officer Sell 17.5 -20,000 -19.88% ✗ $2.4M
Feb 6, 2026 Feb 6, 2026 DeLuca Richard R. EVP&Pres, Merck Animal Heallth Sell 17.5 -37,685 -19.05% ✗ $4.6M
Feb 4, 2026 Feb 6, 2026 Davis Robert M CEO Sell 16.3 -47,434 -9.66% ✗ $5.6M
Jan 26, 2026 Jan 28, 2026 Zachary Jennifer EVP, General Counsel Neutral 90.0 +11,583 20.20% ✗ -
Jan 26, 2026 Jan 28, 2026 Williams David Michael EVP,Chief Info&Digital Officer Neutral 90.0 +6,112 24.72% ✗ -
Jan 26, 2026 Jan 28, 2026 Smart Dalton E. III SVP Fin. - Global Controller Neutral 90.0 +1,066 11.18% ✗ -
Jan 26, 2026 Jan 28, 2026 Romanelli Joseph President Neutral 90.0 +5,703 24.76% ✗ -
Jan 26, 2026 Jan 28, 2026 Oosthuizen Johannes Jacobus President Neutral 90.0 +5,026 16.12% ✗ -
Jan 26, 2026 Jan 28, 2026 Litchfield Caroline CFO Neutral 90.0 +15,852 21.32% ✗ -
Jan 26, 2026 Jan 28, 2026 Li Dean Y President Neutral 90.0 +20,469 25.02% ✗ -
Jan 26, 2026 Jan 28, 2026 Guindo Chirfi Chief Marketing Officer Neutral 90.0 +9,865 10.86% ✗ -
Jan 26, 2026 Jan 28, 2026 DeLuca Richard R. EVP&Pres, Merck Animal Heallth Neutral 85.0 +12,264 6.56% ✗ -
Jan 26, 2026 Jan 28, 2026 Davis Robert M CEO Neutral 90.0 +47,434 10.69% ✗ -
Jan 26, 2026 Jan 28, 2026 Chattopadhyay Sanat Exe V-P & Pres. MMD Neutral 85.0 +13,880 7.49% ✗ -
Dec 31, 2025 Jan 5, 2026 Seidman Christine E Director Neutral 52.5 - 0.00% ✗ -
Dec 31, 2025 Jan 5, 2026 GLOCER THOMAS H Director Neutral 52.5 - 0.00% ✗ -
Dec 31, 2025 Jan 5, 2026 Coe Mary Ellen Director Neutral 52.5 - 0.00% ✗ -
Nov 10, 2025 Nov 12, 2025 Downing Cristal N Chief Comm. & Public Afrs Ofcr Sell 20.0 -7,085 -100.00% ✗ $616.4K
Nov 3, 2025 Nov 4, 2025 Williams David Michael EVP,Chief Info&Digital Officer Sell 20.0 -8,614 -25.95% ✗ $720K
Sep 30, 2025 Oct 2, 2025 Seidman Christine E Director Neutral 52.5 - 0.00% ✗ -
Sep 30, 2025 Oct 2, 2025 GLOCER THOMAS H Director Neutral 52.5 - 0.00% ✗ -
Sep 30, 2025 Oct 2, 2025 Coe Mary Ellen Director Neutral 52.5 - 0.00% ✗ -
Aug 4, 2025 Aug 5, 2025 Williams David Michael EVP,Chief Info&Digital Officer Sell 20.0 -8,432 -20.34% ✗ $668.6K
Aug 4, 2025 Aug 5, 2025 Guindo Chirfi Chief Marketing Officer Sell 17.5 -18,175 -16.91% ✗ $1.4M
Jun 30, 2025 Jul 2, 2025 Seidman Christine E Director Neutral 52.5 - 0.00% ✗ -
Jun 30, 2025 Jul 2, 2025 GLOCER THOMAS H Director Neutral 52.5 - 0.00% ✗ -
Jun 30, 2025 Jul 2, 2025 Coe Mary Ellen Director Neutral 52.5 - 0.00% ✗ -
May 30, 2025 Jun 3, 2025 Warden Kathy J Director Neutral 52.5 - 0.00% ✗ -
May 30, 2025 Jun 3, 2025 THULIN INGE G Director Neutral 52.5 - 0.00% ✗ -
May 30, 2025 Jun 3, 2025 Seidman Christine E Director Neutral 52.5 - 0.00% ✗ -
May 30, 2025 Jun 3, 2025 RUSSO PATRICIA F Director Neutral 52.5 - 0.00% ✗ -
May 30, 2025 Jun 3, 2025 Rothman Paul Director Neutral 52.5 - 0.00% ✗ -
May 30, 2025 Jun 3, 2025 Mayo Stephen Director Neutral 52.5 - 0.00% ✗ -
May 30, 2025 Jun 3, 2025 LAVIZZO-MOUREY RISA J Director Neutral 52.5 - 0.00% ✗ -
May 30, 2025 Jun 3, 2025 Karsanbhai Surendralal Lanca Director Neutral 52.5 - 0.00% ✗ -
May 30, 2025 Jun 3, 2025 GLOCER THOMAS H Director Neutral 52.5 - 0.00% ✗ -
May 30, 2025 Jun 3, 2025 Craig Pamela J. Director Neutral 52.5 - 0.00% ✗ -
May 30, 2025 Jun 3, 2025 Coe Mary Ellen Director Neutral 52.5 - 0.00% ✗ -
May 30, 2025 Jun 3, 2025 BAKER DOUGLAS M JR Director Neutral 52.5 - 0.00% ✗ -
May 3, 2025 May 5, 2025 Smart Dalton E. III SVP Fin. - Global Controller Sell 22.5 -844 -4.45% ✗ $70.2K
Apr 30, 2025 May 2, 2025 Smart Dalton E. III SVP Fin. - Global Controller Sell 26.3 -290 -1.74% ✗ $24.4K
Apr 30, 2025 May 2, 2025 Romanelli Joseph President Sell 22.5 -2,132 -4.55% ✗ $179K
Apr 30, 2025 May 2, 2025 Larson Betty D EVP, Chief HR Officer Sell 20.0 -5,153 -45.40% ✗ $436.5K
May 2, 2025 Romanelli Joseph President Neutral 52.5 - 0.00% ✗ -
May 2, 2025 Larson Betty D EVP, Chief HR Officer Neutral 52.5 - 0.00% ✗ -
Apr 29, 2025 May 1, 2025 Smart Dalton E. III SVP Fin. - Global Controller Neutral 52.5 - 0.00% ✗ -
Apr 29, 2025 May 1, 2025 Litchfield Caroline CFO Neutral 52.5 - 0.00% ✗ -
Apr 29, 2025 May 1, 2025 Williams David Michael EVP,Chief Info&Digital Officer Neutral 52.5 - 0.00% ✗ -
Apr 29, 2025 May 1, 2025 Chattopadhyay Sanat Exe V-P & Pres. MMD Neutral 52.5 - 0.00% ✗ -
Apr 29, 2025 May 1, 2025 DeLuca Richard R. EVP&Pres, Merck Animal Heallth Neutral 52.5 - 0.00% ✗ -
Apr 29, 2025 May 1, 2025 Davis Robert M CEO Neutral 52.5 - 0.00% ✗ -
Apr 29, 2025 May 1, 2025 Oosthuizen Johannes Jacobus President Neutral 52.5 - 0.00% ✗ -
Apr 29, 2025 May 1, 2025 Li Dean Y President Neutral 52.5 - 0.00% ✗ -
Apr 29, 2025 May 1, 2025 Zachary Jennifer EVP, General Counsel Neutral 52.5 - 0.00% ✗ -
Apr 29, 2025 May 1, 2025 Downing Cristal N Chief Comm. & Public Afrs Ofcr Neutral 52.5 - 0.00% ✗ -
Apr 29, 2025 May 1, 2025 Larson Betty D EVP, Chief HR Officer Neutral 52.5 - 0.00% ✗ -
Apr 29, 2025 May 1, 2025 Guindo Chirfi Chief Marketing Officer Neutral 52.5 - 0.00% ✗ -
Apr 29, 2025 May 1, 2025 Romanelli Joseph President Neutral 52.5 - 0.00% ✗ -
Apr 25, 2025 Apr 29, 2025 Smart Dalton E. III SVP Fin. - Global Controller Sell 20.0 -4,262 -35.40% ✗ $352.7K
Mar 31, 2025 Apr 2, 2025 Seidman Christine E Director Neutral 52.5 - 0.00% ✗ -
Mar 31, 2025 Apr 2, 2025 GLOCER THOMAS H Director Neutral 52.5 - 0.00% ✗ -
Mar 31, 2025 Apr 2, 2025 Coe Mary Ellen Director Neutral 52.5 - 0.00% ✗ -
Feb 19, 2025 Feb 20, 2025 Oosthuizen Johannes Jacobus President Sell 20.0 -8,500 -21.68% ✗ $714.7K
Feb 13, 2025 Feb 13, 2025 Williams David Michael EVP,Chief Info&Digital Officer Sell 20.0 -6,000 -19.92% ✗ $512.1K
Feb 8, 2025 Feb 11, 2025 Oosthuizen Johannes Jacobus President Sell 20.0 -6,404 -14.04% ✗ $558.9K
Feb 6, 2025 Feb 7, 2025 THULIN INGE G Director Buy 95.0 +2,832 2832.86% ✗ $250K
Feb 6, 2025 Feb 7, 2025 Downing Cristal N Chief Comm. & Public Afrs Ofcr Sell 22.5 -2,361 -24.99% ✗ $209.6K
Feb 5, 2025 Feb 7, 2025 BAKER DOUGLAS M JR Director Buy 100.0 +15,000 1500.00% ✗ $1.3M
Jan 27, 2025 Jan 29, 2025 Zachary Jennifer EVP, General Counsel Neutral 90.0 +25,423 85.13% ✗ -
Jan 27, 2025 Jan 29, 2025 Williams David Michael EVP,Chief Info&Digital Officer Neutral 90.0 +10,246 51.55% ✗ -
Jan 27, 2025 Jan 29, 2025 Smart Dalton SVP Fin. - Global Controller Neutral 90.0 +2,586 58.40% ✗ -
Jan 27, 2025 Jan 29, 2025 Oosthuizen Johannes Jacobus President Neutral 90.0 +8,664 36.19% ✗ -
Jan 27, 2025 Jan 29, 2025 Litchfield Caroline CFO Neutral 90.0 +23,432 46.03% ✗ -
Jan 27, 2025 Jan 29, 2025 Li Dean Y President Neutral 90.0 +32,621 69.45% ✗ -
Jan 27, 2025 Jan 29, 2025 Downing Cristal N Chief Comm. & Public Afrs Ofcr Neutral 90.0 +9,446 100.00% ✗ -
Jan 27, 2025 Jan 29, 2025 DeLuca Richard R. EVP&Pres, Merck Animal Heallth Neutral 90.0 +25,438 16.43% ✗ -
Jan 27, 2025 Jan 29, 2025 Davis Robert M CEO Neutral 90.0 +95,275 27.35% ✗ -
Jan 27, 2025 Jan 29, 2025 Chattopadhyay Sanat Exe V-P & Pres. MMD Neutral 90.0 +28,136 17.90% ✗ -
Jan 27, 2025 Jan 29, 2025 Guindo Chirfi Chief Marketing Officer Neutral 90.0 +28,158 68.61% ✗ -
Dec 31, 2024 Jan 3, 2025 Seidman Christine E Director Neutral 52.5 - 0.00% ✗ -
Dec 31, 2024 Jan 3, 2025 GLOCER THOMAS H Director Neutral 52.5 - 0.00% ✗ -
Dec 31, 2024 Jan 3, 2025 Coe Mary Ellen Director Neutral 52.5 - 0.00% ✗ -
Jan 1, 2025 Jan 3, 2025 Karsanbhai Surendralal Lanca Director Neutral 52.5 - 0.00% ✗ -
Jan 3, 2025 Karsanbhai Surendralal Lanca Director Neutral 52.5 - 0.00% ✗ -
Dec 23, 2024 Merck & Co., Inc. 10% Owner Neutral 52.5 - 0.00% ✗ -
Sep 30, 2024 Oct 1, 2024 Seidman Christine E Director Neutral 52.5 - 0.00% ✗ -
Sep 30, 2024 Oct 1, 2024 GLOCER THOMAS H Director Neutral 52.5 - 0.00% ✗ -
Sep 30, 2024 Oct 1, 2024 Coe Mary Ellen Director Neutral 52.5 - 0.00% ✗ -
Aug 5, 2024 Aug 6, 2024 Guindo Chirfi Chief Marketing Officer Sell 17.5 -17,412 -30.11% ✗ $2M
Jun 28, 2024 Jul 2, 2024 Seidman Christine E Director Neutral 52.5 - 0.00% ✗ -
Jun 28, 2024 Jul 2, 2024 GLOCER THOMAS H Director Neutral 52.5 - 0.00% ✗ -