Merck & Co., Inc. (MRK) Insider Ownership

Historic Insider Ownership Trends

Merck's three largest insider shareholders as of March 23, 2026 are Kenneth C Frazier (Executive Chair, 700.65K shares), Robert M Davis (Chairman, Ceo President, 443.60K shares), Richard R. Deluca (Evppres, Merck Animal Heallth, 160.17K shares).

Top Direct Holders

Insider ownership data is derived from the last 60 months of Form 4 SEC filings.
Holder Position Shares (Direct) Shares (Indirect) Report Date
Kenneth C Frazier Executive Chair 700,653 0 08 Nov, 2022
Robert M Davis Chairman, Ceo President 443,602 0 06 Feb, 2026
Richard R. Deluca Evppres, Merck Animal Heallth 160,174 0 06 Feb, 2026
Frank Clyburn Evp Pres ? Human Health 97,095 0 02 Nov, 2021
Dean Y Li Executive Vp President, Mrl 92,035 0 10 Feb, 2026
Caroline Litchfield Evp Cfo 90,192 0 06 Feb, 2026
Jennifer Zachary Evp, General Counsel 68,916 0 09 Feb, 2026
Chirfi Guindo Chief Marketing Officer 60,615 0 12 Feb, 2026
Julie L. Gerberding Evp, Chief Patient Officer 48,712 0 28 Feb, 2022
Rita A Karachun Sr. Vp Fince Global Controller 45,710 0 05 May, 2023
David Michael Williams Evp,Chief Infodigital Officer 30,838 0 06 Feb, 2026
Joseph Romanelli President, Human Health Int?L 28,739 0 28 Jan, 2026
Michael A Klobuchar Evp Chief Strategy Officer 23,621 0 06 May, 2024
Steven Mizell Evp, Chief Hr Officer 23,619 0 02 Feb, 2024
Johannes Jacobus Oosthuizen President, U.S. Market 21,197 0 06 Feb, 2026
Douglas M Jr Baker 16,000 0 07 Feb, 2025
Douglas M Jr Baker 16,000 0 07 Feb, 2025
Sanat Chattopadhyay Exe V P Pres. Mmd 13,880 0 28 Jan, 2026
Dalton E. Iii Smart Svp Fin. Global Controller 8,205 0 06 Feb, 2026
Betty D Larson Evp, Chief Hr Officer 6,197 0 02 May, 2025
Lisa Lecointe-Cephas Svp Chief Ethics Com Officer 5,142 0 05 May, 2023
Inge G Thulin 2,933 0 07 Feb, 2025
Arpa Garay Svp Human Health Global Mktg. 2,109 0 05 May, 2022

* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.

Recent Insider Transactions

Detailed insider trading activity based on Form 4 SEC filings.
Download Data
Transaction Date Insider Name Security Class Transaction Type Shares Traded Price Shares Remaining Ownership Code
12 Feb, 2026 Chirfi Guindo Common Stock D 10,000 $121.46 60,615 D S
10 Feb, 2026 Dean Y Li Common Stock D 10,235 $117.52 92,035 D S
09 Feb, 2026 Chirfi Guindo Common Stock D 10,000 $118.41 70,615 D S
09 Feb, 2026 Jennifer Zachary Common Stock A 25,946 $119.15 94,862 D M
09 Feb, 2026 Jennifer Zachary Common Stock D 25,946 $119.15 68,916 D S
09 Feb, 2026 Jennifer Zachary Common Stock A 56,792 $119.15 125,708 D M
09 Feb, 2026 Jennifer Zachary Common Stock D 56,792 $119.15 68,916 D S
09 Feb, 2026 Jennifer Zachary Common Stock A 38,835 $119.15 107,751 D M
09 Feb, 2026 Jennifer Zachary Common Stock D 38,835 $119.15 68,916 D S
09 Feb, 2026 Jennifer Zachary Stock Option (Right to Buy) D 25,946 $0.00 0 D M
09 Feb, 2026 Jennifer Zachary Stock Option (Right to Buy) D 56,792 $0.00 0 D M
09 Feb, 2026 Jennifer Zachary Stock Option (Right to Buy) D 38,835 $0.00 0 D M
06 Feb, 2026 Johannes Jacobus Oosthuizen Common Stock D 15,000 $121.87 21,197 D S
04 Feb, 2026 Dean Y Li Common Stock A 15,087 $56.04 117,357 D M
04 Feb, 2026 Caroline Litchfield Common Stock A 41,997 $53.06 132,189 D M
04 Feb, 2026 Robert M Davis Common Stock D 14,972 $117.38 476,064 D S
04 Feb, 2026 Dalton E. Iii Smart Common Stock A 4,000 $62.07 14,605 D M
06 Feb, 2026 Richard R. Deluca Common Stock D 37,685 $120.92 160,174 D S
06 Feb, 2026 David Michael Williams Common Stock A 5,000 $77.62 35,838 D M
05 Feb, 2026 Chirfi Guindo Common Stock D 20,000 $121.88 80,615 D S