Merck (NYSE: MRK) insider transactions
In the twelve months to 10 November 2026, executives and directors of Merck reported 33 open-market sales of 568,649 shares ($70.7m) and 0 open-market purchases, by 10 people, according to the Form 4 filings they submitted to the SEC.
Latest transactions
| Date | Insider | Role | Transaction | Shares | Price | Held after | Filing |
|---|---|---|---|---|---|---|---|
| 13 August 2026 | Guindo Chirfi | EVP, Access, Policy & Comms | Open-market sale | −10,000 | $135.00 | 36,613 | Form 4 |
| 12 August 2026 | Zachary Jennifer | EVP, General Counsel | Option exercise | +41,494 | $117.89 | 112,391 | Form 4 |
| 12 August 2026 | Zachary Jennifer | EVP, General Counsel | Option exercise | +13,433 | $84.71 | 125,824 | Form 4 |
| 12 August 2026 | Zachary Jennifer | EVP, General Counsel | Open-market sale | −80,315 | $133.46 | 45,509 | Form 4 |
| 12 August 2026 | DeLuca Richard R. | EVP&Pres, Merck Animal Heallth | Open-market sale | −11,099 | $131.61 | 110,767 | Form 4 |
| 12 August 2026 | DeLuca Richard R. | EVP&Pres, Merck Animal Heallth | Open-market sale | −600 | $132.04 | 110,167 | Form 4 |
| 11 August 2026 | DeLuca Richard R. | EVP&Pres, Merck Animal Heallth | Open-market sale | −7,410 | $131.33 | 127,293 | Form 4 |
| 11 August 2026 | DeLuca Richard R. | EVP&Pres, Merck Animal Heallth | Open-market sale | −5,427 | $132.35 | 121,866 | Form 4 |
| 10 August 2026 | DeLuca Richard R. | EVP&Pres, Merck Animal Heallth | Open-market sale | −20,784 | $130.43 | 134,703 | Form 4 |
| 6 August 2026 | DeLuca Richard R. | EVP&Pres, Merck Animal Heallth | Open-market sale | −805 | $131.02 | 160,732 | Form 4 |
| 6 August 2026 | DeLuca Richard R. | EVP&Pres, Merck Animal Heallth | Open-market sale | −4,945 | $130.23 | 155,787 | Form 4 |
| 6 August 2026 | DeLuca Richard R. | EVP&Pres, Merck Animal Heallth | Open-market sale | −300 | $131.02 | 155,487 | Form 4 |
| 6 August 2026 | Guindo Chirfi | EVP, Access, Policy & Comms | Open-market sale | −15,000 | $131.00 | 46,613 | Form 4 |
| 5 August 2026 | Williams David Michael | EVP,Chief Info&Digital Officer | Option exercise | +4,600 | $77.62 | 36,316 | Form 4 |
| 5 August 2026 | Williams David Michael | EVP,Chief Info&Digital Officer | Open-market sale | −4,600 | $128.77 | 31,716 | Form 4 |
| 5 August 2026 | Williams David Michael | EVP,Chief Info&Digital Officer | Option exercise | +13,542 | $75.36 | 45,258 | Form 4 |
| 5 August 2026 | Williams David Michael | EVP,Chief Info&Digital Officer | Open-market sale | −13,542 | $128.77 | 31,716 | Form 4 |
| 5 August 2026 | Williams David Michael | EVP,Chief Info&Digital Officer | Option exercise | +34,705 | $73.73 | 66,421 | Form 4 |
| 5 August 2026 | Williams David Michael | EVP,Chief Info&Digital Officer | Open-market sale | −34,705 | $128.77 | 31,716 | Form 4 |
| 5 August 2026 | Maraldo David R. | EVP & Pres. MMD | Option exercise | +6,311 | $73.73 | 24,523 | Form 4 |
Names appear as in the filing, surname first. A dash in the price column means the filing reports none, as in grants and gifts.
How to read the table
Only open-market purchases and sales are trades the insider chose to make at the market price, and they are the ones counted in the summary above. Grants, option exercises and shares withheld for tax come from pay plans. A sale marked as a 10b5-1 plan was scheduled in advance under a written plan.
Where each row comes from
From the Form 4 that each executive, director or large shareholder must file with the SEC within two business days of a transaction, read up to 10 November 2026. Each row links to its filing on EDGAR. Only transactions in shares are listed, not derivatives, and amended filings are left out. The accounts of the company are on the Merck page; the method, in data sources.
Information prepared from the Form 4 filings submitted to the SEC, for information purposes only. It is not financial advice or a recommendation to buy or sell. Updated on 12 November 2026.