Merck & Co Inc Insider Trading
Every director, officer and 10% holder of Merck & Co Inc has to report each trade in its stock within two business days of making it. This is those filings.
MRK on carbonthat →Purchases and sales
Open-market trades only — the lines where someone chose to buy or sell at the going price.
| Insider | Action | Value |
|---|---|---|
| Chirfi GuindoEVP, Access, Policy & Comms2026-08-1310K shat $135.00 | Sale | $1.4M |
| Jennifer ZacharyEVP, General Counsel2026-08-1280.3K shat $133.46 | Sale | $10.7M |
| Richard R. DeLucaEVP&Pres, Merck Animal Heallth2026-08-1211.1K shat $131.61 | Sale | $1.5M |
| Richard R. DeLucaEVP&Pres, Merck Animal Heallth2026-08-12600 shat $132.04 | Sale | $79.2K |
| Richard R. DeLucaEVP&Pres, Merck Animal Heallth2026-08-117.4K shat $131.33 | Sale | $973.2K |
| Richard R. DeLucaEVP&Pres, Merck Animal Heallth2026-08-115.4K shat $132.35 | Sale | $718.3K |
| Richard R. DeLucaEVP&Pres, Merck Animal Heallth2026-08-1020.8K shat $130.43 | Sale | $2.7M |
| Richard R. DeLucaEVP&Pres, Merck Animal Heallth2026-08-06805 shat $131.02 | Sale | $105.5K |
| Richard R. DeLucaEVP&Pres, Merck Animal Heallth2026-08-064.9K shat $130.23 | Sale | $644K |
| Richard R. DeLucaEVP&Pres, Merck Animal Heallth2026-08-06300 shat $131.02 | Sale | $39.3K |
| Chirfi GuindoEVP, Access, Policy & Comms2026-08-0615K shat $131.00 | Sale | $2M |
| David R. MaraldoEVP & Pres. MMD2026-08-056.3K shat $128.72 | Sale | $812.3K |
| David R. MaraldoEVP & Pres. MMD2026-08-059.7K shat $128.72 | Sale | $1.2M |
| David R. MaraldoEVP & Pres. MMD2026-08-052.7K shat $128.72 | Sale | $345.7K |
| David Michael WilliamsEVP,Chief Info&Digital Officer2026-08-054.6K shat $128.77 | Sale | $592.3K |
| David Michael WilliamsEVP,Chief Info&Digital Officer2026-08-0513.5K shat $128.77 | Sale | $1.7M |
| David Michael WilliamsEVP,Chief Info&Digital Officer2026-08-0534.7K shat $128.77 | Sale | $4.5M |
Source: SEC Form 4 filings, via EDGAR. A derivative line reports the shares underlying an option rather than stock outstanding, so it is marked and is not comparable with the rest. Value is shares times the reported price, and is blank where the filing priced the transaction at zero — a grant costs its recipient nothing. Insiders sell for reasons that have nothing to do with the company, which is why a sale is not read as a signal on its own.
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