16 insiders reported 100 Form 4 transactions for Merck & Co., Inc. (MRK) over the past 18 months (most recent 2026-05-01). Recent activity: Chattopadhyay Sanat (Exe V-P & Pres. MMD) Buy 2,597 shares, Oosthuizen Johannes Jacobus (EVP, Oncology & Int?l) Sell 679 shares, DeLuca Richard R. (EVP&Pres, Merck Animal Heallth) Buy 2,518 shares, Smart Dalton E. III (SVP Fin. - Global Controller) Buy 944 shares, Larson Betty D (EVP, Chief HR Officer) Buy 2,085 shares. Source: SEC Form 4.
| Date | Insider | Title | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-05-01 | Chattopadhyay Sanat | Exe V-P & Pres. MMD | Buy | 2,597 | $285,748 |
| 2026-05-01 | Oosthuizen Johannes Jacobus | EVP, Oncology & Int?l | Sell | 679 | $74,710 |
| 2026-05-01 | DeLuca Richard R. | EVP&Pres, Merck Animal Heallth | Buy | 2,518 | $277,056 |
| 2026-05-01 | Smart Dalton E. III | SVP Fin. - Global Controller | Buy | 944 | $103,868 |
| 2026-05-01 | Larson Betty D | EVP, Chief HR Officer | Buy | 2,085 | $229,413 |
| 2026-05-01 | Litchfield Caroline | EVP & CFO | Buy | 3,935 | $432,968 |
| 2026-05-01 | Li Dean Y | Executive VP & President, MRL | Buy | 4,722 | $519,562 |
| 2026-05-01 | Smart Dalton E. III | SVP Fin. - Global Controller | Sell | 159 | $17,641 |
| 2026-05-01 | Zachary Jennifer | EVP, General Counsel | Buy | 2,951 | $324,699 |
| 2026-05-01 | Davis Robert M | Chairman, CEO & President | Buy | 13,300 | $1.5M |
| 2026-05-01 | Guindo Chirfi | EVP, Access, Policy & Comms | Buy | 1,967 | $216,429 |
| 2026-05-01 | Zachary Jennifer | EVP, General Counsel | Sell | 1,454 | $159,984 |
| 2026-05-01 | Guindo Chirfi | EVP, Access, Policy & Comms | Sell | 969 | $106,619 |
| 2026-05-01 | Chattopadhyay Sanat | Exe V-P & Pres. MMD | Sell | 1,130 | $124,334 |
| 2026-05-01 | Davis Robert M | Chairman, CEO & President | Sell | 6,551 | $720,807 |
| 2026-05-01 | Williams David Michael | EVP,Chief Info&Digital Officer | Sell | 679 | $74,710 |
| 2026-05-01 | Li Dean Y | Executive VP & President, MRL | Sell | 2,326 | $255,930 |
| 2026-05-01 | Larson Betty D | EVP, Chief HR Officer | Sell | 715 | $78,671 |
| 2026-05-01 | Litchfield Caroline | EVP & CFO | Sell | 1,938 | $213,238 |
| 2026-05-01 | Oosthuizen Johannes Jacobus | EVP, Oncology & Int?l | Buy | 1,377 | $151,511 |
| 2026-05-01 | DeLuca Richard R. | EVP&Pres, Merck Animal Heallth | Sell | 1,241 | $136,547 |
| 2026-05-01 | Smart Dalton E. III | SVP Fin. - Global Controller | Sell | 324 | $35,650 |
| 2026-05-01 | Larson Betty D | EVP, Chief HR Officer | Buy | 11,350 | $1.3M |
| 2026-05-01 | Smart Dalton E. III | SVP Fin. - Global Controller | Buy | 464 | $51,481 |
| 2026-05-01 | Williams David Michael | EVP,Chief Info&Digital Officer | Buy | 1,377 | $151,511 |
Source: SEC Form 4 filings · as of 2026-05-01