Insider
Date
Role
Action
Shares
Price
Amount
Chirfi Guindo
13 Aug 2026
EVP, Access, Policy & Comms
Sell
10,000
$135.00
$1.35M
Richard R. DeLuca
12 Aug 2026
EVP&Pres, Merck Animal Heallth
Sell
600
$132.04
$79.22K
Richard R. DeLuca
12 Aug 2026
EVP&Pres, Merck Animal Heallth
Sell
11,099
$131.61
$1.46M
Jennifer Zachary
12 Aug 2026
EVP, General Counsel
Sold after exercise
80,315
$133.46
$10.72M
Richard R. DeLuca
11 Aug 2026
EVP&Pres, Merck Animal Heallth
Sell
5,427
$132.35
$718.26K
Richard R. DeLuca
11 Aug 2026
EVP&Pres, Merck Animal Heallth
Sell
7,410
$131.33
$973.16K
Richard R. DeLuca
10 Aug 2026
EVP&Pres, Merck Animal Heallth
Sell
20,784
$130.43
$2.71M
Chirfi Guindo
6 Aug 2026
EVP, Access, Policy & Comms
Sell
15,000
$131.00
$1.97M
Richard R. DeLuca
6 Aug 2026
EVP&Pres, Merck Animal Heallth
Sell
300
$131.02
$39.31K
Richard R. DeLuca
6 Aug 2026
EVP&Pres, Merck Animal Heallth
Sell
4,945
$130.23
$643.99K
Richard R. DeLuca
6 Aug 2026
EVP&Pres, Merck Animal Heallth
Sell
805
$131.02
$105.47K
David Michael Williams
5 Aug 2026
EVP,Chief Info&Digital Officer
Sold after exercise
34,705
$128.77
$4.47M
David Michael Williams
5 Aug 2026
EVP,Chief Info&Digital Officer
Sold after exercise
13,542
$128.77
$1.74M
David Michael Williams
5 Aug 2026
EVP,Chief Info&Digital Officer
Sold after exercise
4,600
$128.77
$592.35K
David R. Maraldo
5 Aug 2026
EVP & Pres. MMD
Sold after exercise
2,686
$128.72
$345.74K
David R. Maraldo
5 Aug 2026
EVP & Pres. MMD
Sold after exercise
9,709
$128.72
$1.25M
David R. Maraldo
5 Aug 2026
EVP & Pres. MMD
Sold after exercise
6,311
$128.72
$812.34K
David R. Maraldo
2 May 2026
EVP & Pres. MMD
Exercised, kept
552
$112.16
$61.91K
Dalton E. Smart III
2 May 2026
SVP Fin. - Global Controller
Exercised, kept
383
$112.16
$42.96K
Betty D Larson
30 Apr 2026
EVP, Chief HR Officer
Exercised, kept
11,350
$110.95
$1.26M
Dalton E. Smart III
30 Apr 2026
SVP Fin. - Global Controller
Exercised, kept
464
$110.95
$51.48K
Johannes Jacobus Oosthuizen
29 Apr 2026
EVP, Oncology & Int?l
Exercised, kept
1,377
$110.03
$151.51K
Robert M Davis
29 Apr 2026
Chairman, CEO & President
Exercised, kept
13,300
$110.03
$1.46M
Caroline Litchfield
29 Apr 2026
EVP & CFO
Exercised, kept
3,935
$110.03
$432.97K
Betty D Larson
29 Apr 2026
EVP, Chief HR Officer
Exercised, kept
2,085
$110.03
$229.41K
Jennifer Zachary
29 Apr 2026
EVP, General Counsel
Exercised, kept
2,951
$110.03
$324.70K
Dean Y Li
29 Apr 2026
Executive VP & President, MRL
Exercised, kept
4,722
$110.03
$519.56K
Dalton E. Smart III
29 Apr 2026
SVP Fin. - Global Controller
Exercised, kept
944
$110.03
$103.87K
David Michael Williams
29 Apr 2026
EVP,Chief Info&Digital Officer
Exercised, kept
1,377
$110.03
$151.51K
Richard R. DeLuca
29 Apr 2026
EVP&Pres, Merck Animal Heallth
Exercised, kept
2,518
$110.03
$277.06K
Sanat Chattopadhyay
29 Apr 2026
Exe V-P & Pres. MMD
Exercised, kept
2,597
$110.03
$285.75K
Chirfi Guindo
29 Apr 2026
EVP, Access, Policy & Comms
Exercised, kept
1,967
$110.03
$216.43K
Chirfi Guindo
12 Feb 2026
Chief Marketing Officer
Sell
10,000
$121.46
$1.21M
Dean Y Li
10 Feb 2026
Executive VP & President, MRL
Sell
10,235
$117.52
$1.20M
Jennifer Zachary
9 Feb 2026
EVP, General Counsel
Sold after exercise
38,835
$119.15
$4.63M
Jennifer Zachary
9 Feb 2026
EVP, General Counsel
Sold after exercise
56,792
$119.15
$6.77M
Jennifer Zachary
9 Feb 2026
EVP, General Counsel
Sold after exercise
25,946
$119.15
$3.09M
Chirfi Guindo
9 Feb 2026
Chief Marketing Officer
Sell
10,000
$118.41
$1.18M
Richard R. DeLuca
6 Feb 2026
EVP&Pres, Merck Animal Heallth
Sell
37,685
$120.92
$4.56M
Johannes Jacobus Oosthuizen
6 Feb 2026
President, U.S. Market
Sell
15,000
$121.87
$1.83M
David Michael Williams
6 Feb 2026
EVP,Chief Info&Digital Officer
Sold after exercise
5,000
$121.91
$609.53K
Chirfi Guindo
5 Feb 2026
Chief Marketing Officer
Sell
20,000
$121.88
$2.44M
Robert M Davis
4 Feb 2026
Chairman, CEO & President
Sell
32,462
$118.35
$3.84M
Robert M Davis
4 Feb 2026
Chairman, CEO & President
Sell
14,972
$117.38
$1.76M
Dean Y Li
4 Feb 2026
Executive VP & President, MRL
Sold after exercise
15,087
$118.77
$1.79M
Caroline Litchfield
4 Feb 2026
EVP & CFO
Sold after exercise
41,997
$119.61
$5.02M
Dalton E. Smart III
4 Feb 2026
SVP Fin. - Global Controller
Sold after exercise
2,400
$119.68
$287.22K
Dalton E. Smart III
4 Feb 2026
SVP Fin. - Global Controller
Sold after exercise
4,000
$119.68
$478.70K
Cristal N Downing
10 Nov 2025
Chief Comm. & Public Afrs Ofcr
Sell
7,085
$87.00
$616.40K
