Merck & Co. · Insider Trading

Last 365 days · Open-market buys and sells by officers and directors · Same-day, same-person, same-direction trades combined · Amounts in USD millions← MRK

Buy

0 · $0.00M

Sell

9 · $30.0M

Net

−$30.0M

By Insider

Name	Title	Buy	Sell	Latest Trade
Zachary Jennifer	EVP, General Counsel	—	80,315 shares · $10.7M	2026-08-12
Williams David Michael	EVP,Chief Info&Digital Officer	—	52,847 shares · $6.8M	2026-08-05
DeLuca Richard R.	EVP&Pres, Merck Animal Heallth	—	51,370 shares · $6.7M	2026-08-12
Guindo Chirfi	EVP, Access, Policy & Comms	—	25,000 shares · $3.3M	2026-08-13
Maraldo David R.	EVP & Pres. MMD	—	18,706 shares · $2.4M	2026-08-05

All Trades

Date	Name	Title	Side	Shares	Trades	Avg Price	Value
2026-08-13	Guindo Chirfi	EVP, Access, Policy & Comms	Sell	10,000	1	135.00	$1.4M
2026-08-12	DeLuca Richard R.	EVP&Pres, Merck Animal Heallth	Sell	11,699	2	131.63	$1.5M
2026-08-12	Zachary Jennifer	EVP, General Counsel	Sell	80,315	1	133.46	$10.7M
2026-08-11	DeLuca Richard R.	EVP&Pres, Merck Animal Heallth	Sell	12,837	2	131.76	$1.7M
2026-08-10	DeLuca Richard R.	EVP&Pres, Merck Animal Heallth	Sell	20,784	1	130.43	$2.7M
2026-08-06	Guindo Chirfi	EVP, Access, Policy & Comms	Sell	15,000	1	131.00	$2.0M
2026-08-06	DeLuca Richard R.	EVP&Pres, Merck Animal Heallth	Sell	6,050	3	130.38	$0.79M
2026-08-05	Williams David Michael	EVP,Chief Info&Digital Officer	Sell	52,847	3	128.77	$6.8M
2026-08-05	Maraldo David R.	EVP & Pres. MMD	Sell	18,706	3	128.72	$2.4M

Data comes from insiders' SEC ownership filings (Form 4). Only open-market purchases (P) and sales (S) are counted; option exercises, grants, tax withholding and other non-trading changes are excluded.