Insider
Date
Role
Action
Shares
Price
Amount
Guindo Chirfi
13 Aug 2026
EVP, Access, Policy & Comms
Sell
10,000
$135.00
$1.35M
DeLuca Richard R.
12 Aug 2026
EVP&Pres, Merck Animal Heallth
Sell
600
$132.04
$79.22K
DeLuca Richard R.
12 Aug 2026
EVP&Pres, Merck Animal Heallth
Sell
11,099
$131.61
$1.46M
Zachary Jennifer
12 Aug 2026
EVP, General Counsel
Sold after exercise
80,315
$133.46
$10.72M
DeLuca Richard R.
11 Aug 2026
EVP&Pres, Merck Animal Heallth
Sell
5,427
$132.35
$718.26K
DeLuca Richard R.
11 Aug 2026
EVP&Pres, Merck Animal Heallth
Sell
7,410
$131.33
$973.16K
DeLuca Richard R.
10 Aug 2026
EVP&Pres, Merck Animal Heallth
Sell
20,784
$130.43
$2.71M
Guindo Chirfi
6 Aug 2026
EVP, Access, Policy & Comms
Sell
15,000
$131.00
$1.97M
DeLuca Richard R.
6 Aug 2026
EVP&Pres, Merck Animal Heallth
Sell
300
$131.02
$39.31K
DeLuca Richard R.
6 Aug 2026
EVP&Pres, Merck Animal Heallth
Sell
4,945
$130.23
$643.99K
DeLuca Richard R.
6 Aug 2026
EVP&Pres, Merck Animal Heallth
Sell
805
$131.02
$105.47K
Williams David Michael
5 Aug 2026
EVP,Chief Info&Digital Officer
Sold after exercise
34,705
$128.77
$4.47M
Williams David Michael
5 Aug 2026
EVP,Chief Info&Digital Officer
Sold after exercise
13,542
$128.77
$1.74M
Williams David Michael
5 Aug 2026
EVP,Chief Info&Digital Officer
Sold after exercise
4,600
$128.77
$592.35K
Maraldo David R.
5 Aug 2026
EVP & Pres. MMD
Sold after exercise
2,686
$128.72
$345.74K
Maraldo David R.
5 Aug 2026
EVP & Pres. MMD
Sold after exercise
9,709
$128.72
$1.25M
Maraldo David R.
5 Aug 2026
EVP & Pres. MMD
Sold after exercise
6,311
$128.72
$812.34K
Maraldo David R.
2 May 2026
EVP & Pres. MMD
Exercised, kept
552
$112.16
$61.91K
Smart Dalton E. III
2 May 2026
SVP Fin. - Global Controller
Exercised, kept
383
$112.16
$42.96K
Larson Betty D
30 Apr 2026
EVP, Chief HR Officer
Exercised, kept
11,350
$110.95
$1.26M
Smart Dalton E. III
30 Apr 2026
SVP Fin. - Global Controller
Exercised, kept
464
$110.95
$51.48K
Oosthuizen Johannes Jacobus
29 Apr 2026
EVP, Oncology & Int?l
Exercised, kept
1,377
$110.03
$151.51K
Davis Robert M
29 Apr 2026
Chairman, CEO & President
Exercised, kept
13,300
$110.03
$1.46M
Litchfield Caroline
29 Apr 2026
EVP & CFO
Exercised, kept
3,935
$110.03
$432.97K
Larson Betty D
29 Apr 2026
EVP, Chief HR Officer
Exercised, kept
2,085
$110.03
$229.41K
Zachary Jennifer
29 Apr 2026
EVP, General Counsel
Exercised, kept
2,951
$110.03
$324.70K
Li Dean Y
29 Apr 2026
Executive VP & President, MRL
Exercised, kept
4,722
$110.03
$519.56K
Smart Dalton E. III
29 Apr 2026
SVP Fin. - Global Controller
Exercised, kept
944
$110.03
$103.87K
Williams David Michael
29 Apr 2026
EVP,Chief Info&Digital Officer
Exercised, kept
1,377
$110.03
$151.51K
DeLuca Richard R.
29 Apr 2026
EVP&Pres, Merck Animal Heallth
Exercised, kept
2,518
$110.03
$277.06K
Chattopadhyay Sanat
29 Apr 2026
Exe V-P & Pres. MMD
Exercised, kept
2,597
$110.03
$285.75K
Guindo Chirfi
29 Apr 2026
EVP, Access, Policy & Comms
Exercised, kept
1,967
$110.03
$216.43K
Guindo Chirfi
12 Feb 2026
Chief Marketing Officer
Sell
10,000
$121.46
$1.21M
Li Dean Y
10 Feb 2026
Executive VP & President, MRL
Sell
10,235
$117.52
$1.20M
Zachary Jennifer
9 Feb 2026
EVP, General Counsel
Sold after exercise
38,835
$119.15
$4.63M
Zachary Jennifer
9 Feb 2026
EVP, General Counsel
Sold after exercise
56,792
$119.15
$6.77M
Zachary Jennifer
9 Feb 2026
EVP, General Counsel
Sold after exercise
25,946
$119.15
$3.09M
Guindo Chirfi
9 Feb 2026
Chief Marketing Officer
Sell
10,000
$118.41
$1.18M
DeLuca Richard R.
6 Feb 2026
EVP&Pres, Merck Animal Heallth
Sell
37,685
$120.92
$4.56M
Oosthuizen Johannes Jacobus
6 Feb 2026
President, U.S. Market
Sell
15,000
$121.87
$1.83M
Williams David Michael
6 Feb 2026
EVP,Chief Info&Digital Officer
Sold after exercise
5,000
$121.91
$609.53K
Guindo Chirfi
5 Feb 2026
Chief Marketing Officer
Sell
20,000
$121.88
$2.44M
Davis Robert M
4 Feb 2026
Chairman, CEO & President
Sell
32,462
$118.35
$3.84M
Davis Robert M
4 Feb 2026
Chairman, CEO & President
Sell
14,972
$117.38
$1.76M
Li Dean Y
4 Feb 2026
Executive VP & President, MRL
Sold after exercise
15,087
$118.77
$1.79M
Litchfield Caroline
4 Feb 2026
EVP & CFO
Sold after exercise
41,997
$119.61
$5.02M
Smart Dalton E. III
4 Feb 2026
SVP Fin. - Global Controller
Sold after exercise
2,400
$119.68
$287.22K
Smart Dalton E. III
4 Feb 2026
SVP Fin. - Global Controller
Sold after exercise
4,000
$119.68
$478.70K
Downing Cristal N
10 Nov 2025
Chief Comm. & Public Afrs Ofcr
Sell
7,085
$87.00
$616.40K
Williams David Michael
3 Nov 2025
EVP,Chief Info&Digital Officer
Sell
8,614
$83.59
$720.04K
