Insider Transactions Reported by 36 Insiders of Merck & Co., Inc.

Symbol
MRK on NYSE
Location
Rahway, NJ

Insiders trading volume in the past year

Merck & Co., Inc. executives and other stock owners filed with the SEC include:

Name Relationship Holdings Value Past Year Net Change Change % Report Date
Kenneth C. Frazier Executive Chair, Director $83,678,995 07 Nov 2022
Robert M. Davis Chairman, CEO & President, Director $52,500,844 -$5,599,327 -9.6% 04 Feb 2026
Sanat Chattopadhyay Exe V-P & Pres. MMD $20,998,336 26 Jan 2026
Richard R. DeLuca Jr. EVP&Pres, Merck Animal Heallth $19,368,876 -$4,557,025 -19% 06 Feb 2026
Peter C. Wendell Director $16,586,608 28 Mar 2024
Thomas H. Glocer Director $11,764,924 31 Dec 2025
Frank Clyburn EVP & Pres ? Human Health $11,596,066 30 Oct 2021
Dean Y. Li Executive VP & President, MRL $10,816,198 -$2,994,668 -22% 10 Feb 2026
Caroline Litchfield Evp & Cfo $10,787,996 -$5,023,312 -32% 04 Feb 2026
Mr. Chirfi Guindo Chief Marketing Officer $10,618,772 -$4,836,339 -31% 12 Feb 2026
Jennifer Zachary EVP, General Counsel $8,211,453 -$14,485,690 -64% 09 Feb 2026
Julie L. Gerberding EVP, Chief Patient Officer $5,817,691 24 Feb 2022
Leslie A. Brun Director $5,653,021 28 May 2021
Rita A. Karachun Sr. VP Fince-Global Controller $5,581,631 03 May 2023
Patricia F. Russo Director $5,504,471 30 May 2025
Betty D. Larson EVP, Chief HR Officer $4,910,587 30 Apr 2025
David Michael Williams EVP,Chief Info&Digital Officer $3,759,275 -$1,329,565 -26% 06 Feb 2026
Joseph Romanelli President, Human Health Int?l $3,086,605 26 Jan 2026
Mary Ellen Coe Director $3,077,883 31 Dec 2025
Michael A. Klobuchar EVP - Chief Strategy Officer $3,012,741 04 May 2024
Steven Mizell EVP, Chief HR Officer $2,991,343 02 Feb 2024
Pamela J. Craig Director $2,589,592 30 May 2025
Johannes Jacobus Oosthuizen President, U.S. Market $2,583,243 -$1,827,992 -41% 06 Feb 2026
Paul Rothman Director $2,465,836 30 May 2025
Inge G. Thulin Director $2,127,633 30 May 2025
Christine E. Seidman Director $2,012,330 31 Dec 2025
Douglas M. Baker Jr. Director $1,944,036 30 May 2025
Risa J. Lavizzo-Mourey Director $1,257,457 30 May 2025
Kathy J. Warden Director $1,229,611 30 May 2025
Dalton E. Smart III SVP Fin. - Global Controller $981,911 -$1,118,643 -53% 04 Feb 2026
Stephen Mayo Director $971,223 30 May 2025
Lisa LeCointe-Cephas SVP Chief Ethics & Com Officer $719,173 03 May 2023
Arpa Garay SVP Human Health Global Mktg. $486,165 03 May 2022
Surendralal Lanca Karsanbhai Director $262,982 30 May 2025
Cristal N. Downing Chief Comm. & Public Afrs Ofcr $0 -$616,395 -100% 10 Nov 2025
Brian Foard EVP, Specialty, Pharma, & ID 02 Mar 2026

Recent Insider Transactions by Companies or Individuals for Merck & Co., Inc.

Showing up to 300 most recent insider transactions from the last 12 months.

Insider Symbol Class Transaction % Value $ * Price $ Shares Shares Owned Date Ownership
Mr. Chirfi Guindo MRK Common Stock Sale -14.2% $1,214,562 $121.46 -10,000 60,615 12 Feb 2026 Direct
Dean Y. Li MRK Common Stock Sale -10% $1,202,844 $117.52 -10,235 92,035 10 Feb 2026 Direct
Mr. Chirfi Guindo MRK Common Stock Sale -12.4% $1,184,101 $118.41 -10,000 70,615 09 Feb 2026 Direct
Jennifer Zachary MRK Common Stock Sale -63.8% $14,485,690 $119.15 -121,573 68,916 09 Feb 2026 Direct
Jennifer Zachary MRK Common Stock Options Exercise 2940.3% 121,573 125,708 09 Feb 2026 Direct
Jennifer Zachary MRK Stock Option (Right to Buy) Options Exercise -100% -121,573 0 09 Feb 2026 Direct
David Michael Williams MRK Common Stock Sale -14% $609,525 $121.90 -5,000 30,838 06 Feb 2026 Direct
David Michael Williams MRK Common Stock Options Exercise 16.2% 5,000 35,838 06 Feb 2026 Direct
David Michael Williams MRK Stock Option (Right to Buy) Options Exercise -52.1% -5,000 4,600 06 Feb 2026 Direct
Johannes Jacobus Oosthuizen MRK Common Stock Sale -41.4% $1,827,992 $121.87 -15,000 21,197 06 Feb 2026 Direct
Richard R. DeLuca Jr. MRK Common Stock Sale -19% $4,557,025 $120.92 -37,685 160,174 06 Feb 2026 Direct
Mr. Chirfi Guindo MRK Common Stock Sale -19.9% $2,437,676 $121.88 -20,000 80,615 05 Feb 2026 Direct
Dalton E. Smart III MRK Common Stock Sale -43.8% $765,920 $119.68 -6,400 8,205 04 Feb 2026 Direct
Dalton E. Smart III MRK Common Stock Options Exercise 37.7% 4,000 14,605 04 Feb 2026 Direct
Dalton E. Smart III MRK Stock Option (Right to Buy) Options Exercise -33% -4,000 8,130 04 Feb 2026 Direct
Caroline Litchfield MRK Common Stock Sale -31.8% $5,023,312 $119.61 -41,997 90,192 04 Feb 2026 Direct
Caroline Litchfield MRK Common Stock Options Exercise 46.6% 41,997 132,189 04 Feb 2026 Direct
Caroline Litchfield MRK Stock Option (Right to Buy) Options Exercise -100% -41,997 0 04 Feb 2026 Direct
Dean Y. Li MRK Common Stock Sale -12.9% $1,791,824 $118.77 -15,087 102,270 04 Feb 2026 Direct
Dean Y. Li MRK Common Stock Options Exercise 14.8% 15,087 117,357 04 Feb 2026 Direct
Dean Y. Li MRK Stock Option (Right to Buy) Options Exercise -100% -15,087 0 04 Feb 2026 Direct
Robert M. Davis MRK Common Stock Sale -9.66% $5,599,327 $118.04 -47,434 443,602 04 Feb 2026 Direct
Dalton E. Smart III MRK Common Stock Award 11.2% 1,066 10,605 26 Jan 2026 Direct
Joseph Romanelli MRK Common Stock Award 24.8% 5,703 28,739 26 Jan 2026 Direct
Johannes Jacobus Oosthuizen MRK Common Stock Award 16.1% 5,026 36,197 26 Jan 2026 Direct
Caroline Litchfield MRK Common Stock Award 21.3% 15,852 90,192 26 Jan 2026 Direct
Dean Y. Li MRK Common Stock Award 25% 20,469 102,270 26 Jan 2026 Direct
David Michael Williams MRK Common Stock Award 24.7% 6,112 30,838 26 Jan 2026 Direct
Jennifer Zachary MRK Common Stock Award 20.2% 11,583 68,916 26 Jan 2026 Direct
Mr. Chirfi Guindo MRK Common Stock Award 10.9% 9,865 100,615 26 Jan 2026 Direct
Sanat Chattopadhyay MRK Common Stock Award 13,880 13,880 26 Jan 2026 Direct
Richard R. DeLuca Jr. MRK Common Stock Award 6.61% 12,264 197,859 26 Jan 2026 Direct
Robert M. Davis MRK Common Stock Award 10.7% 47,434 491,036 26 Jan 2026 Direct
Christine E. Seidman MRK Phantom Stock Award 0.41% 77.19 19,026 31 Dec 2025 Direct
Thomas H. Glocer MRK Phantom Stock Award 0.43% 463 107,076 31 Dec 2025 Direct
Mary Ellen Coe MRK Phantom Stock Award 0.98% 285 29,232 31 Dec 2025 Direct
Cristal N. Downing MRK Common Stock Sale -100% $616,395 $87.00 -7,085 0 10 Nov 2025 Direct
David Michael Williams MRK Common Stock Sale -26% $720,040 $83.59 -8,614 24,578 03 Nov 2025 Direct
Christine E. Seidman MRK Phantom Stock Award 0.52% 96.81 18,776 30 Sep 2025 Direct
Thomas H. Glocer MRK Phantom Stock Award 0.55% 581 105,646 30 Sep 2025 Direct
Mary Ellen Coe MRK Phantom Stock Award 1.26% 357 28,685 30 Sep 2025 Direct
David Michael Williams MRK Common Stock Tax liability -20.3% -8,432 33,013 04 Aug 2025 Direct
David Michael Williams MRK Common Stock Options Exercise 70.4% 17,119 41,445 04 Aug 2025 Direct
David Michael Williams MRK Restricted Stock Unit Options Exercise -100% -17,119 0 04 Aug 2025 Direct
Mr. Chirfi Guindo MRK Common Stock Tax liability -16.9% -18,175 89,234 04 Aug 2025 Direct
Mr. Chirfi Guindo MRK Common Stock Options Exercise 52.3% 36,903 107,409 04 Aug 2025 Direct
Mr. Chirfi Guindo MRK Restricted Stock Unit Options Exercise -100% -36,903 0 04 Aug 2025 Direct
Christine E. Seidman MRK Phantom Stock Award 0.56% 103 18,496 30 Jun 2025 Direct
Thomas H. Glocer MRK Phantom Stock Award 0.6% 616 104,041 30 Jun 2025 Direct
Mary Ellen Coe MRK Phantom Stock Award 1.37% 379 28,052 30 Jun 2025 Direct
* An asterisk sign (*) next to the price indicates that the price is likely invalid.