14 insiders reported 111 Form 4 transactions for Merck & Co., Inc. (MRK) over the past 18 months (most recent 2026-08-13). Recent activity: Guindo Chirfi (EVP, Access, Policy & Comms) Sell 10,000 shares, Zachary Jennifer (EVP, General Counsel) Buy 41,494 shares, Zachary Jennifer (EVP, General Counsel) Buy 13,433 shares, Zachary Jennifer (EVP, General Counsel) Sell 80,315 shares, DeLuca Richard R. (EVP&Pres, Merck Animal Heallth) Sell 20,784 shares. Source: SEC Form 4.
| Date | Insider | Title | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-08-13 | Guindo Chirfi | EVP, Access, Policy & Comms | Sell | 10,000 | $1.4M |
| 2026-08-13 | Zachary Jennifer | EVP, General Counsel | Buy | 41,494 | $4.9M |
| 2026-08-13 | Zachary Jennifer | EVP, General Counsel | Buy | 13,433 | $1.1M |
| 2026-08-13 | Zachary Jennifer | EVP, General Counsel | Sell | 80,315 | $10.7M |
| 2026-08-12 | DeLuca Richard R. | EVP&Pres, Merck Animal Heallth | Sell | 20,784 | $2.7M |
| 2026-08-12 | DeLuca Richard R. | EVP&Pres, Merck Animal Heallth | Sell | 7,410 | $973,165 |
| 2026-08-12 | DeLuca Richard R. | EVP&Pres, Merck Animal Heallth | Sell | 5,427 | $718,261 |
| 2026-08-12 | DeLuca Richard R. | EVP&Pres, Merck Animal Heallth | Sell | 11,099 | $1.5M |
| 2026-08-12 | DeLuca Richard R. | EVP&Pres, Merck Animal Heallth | Sell | 600 | $79,222 |
| 2026-08-10 | DeLuca Richard R. | EVP&Pres, Merck Animal Heallth | Sell | 805 | $105,472 |
| 2026-08-10 | DeLuca Richard R. | EVP&Pres, Merck Animal Heallth | Sell | 4,945 | $643,993 |
| 2026-08-10 | DeLuca Richard R. | EVP&Pres, Merck Animal Heallth | Sell | 300 | $39,307 |
| 2026-08-07 | Maraldo David R. | EVP & Pres. MMD | Buy | 6,311 | $465,310 |
| 2026-08-07 | Williams David Michael | EVP,Chief Info&Digital Officer | Buy | 4,600 | $357,052 |
| 2026-08-07 | Guindo Chirfi | EVP, Access, Policy & Comms | Sell | 15,000 | $2.0M |
| 2026-08-07 | Maraldo David R. | EVP & Pres. MMD | Sell | 6,311 | $812,339 |
| 2026-08-07 | Williams David Michael | EVP,Chief Info&Digital Officer | Sell | 4,600 | $592,345 |
| 2026-08-07 | Maraldo David R. | EVP & Pres. MMD | Buy | 9,709 | $845,654 |
| 2026-08-07 | Williams David Michael | EVP,Chief Info&Digital Officer | Buy | 13,542 | $1.0M |
| 2026-08-07 | Williams David Michael | EVP,Chief Info&Digital Officer | Sell | 34,705 | $4.5M |
| 2026-08-07 | Williams David Michael | EVP,Chief Info&Digital Officer | Sell | 13,542 | $1.7M |
| 2026-08-07 | Maraldo David R. | EVP & Pres. MMD | Buy | 2,686 | $227,531 |
| 2026-08-07 | Williams David Michael | EVP,Chief Info&Digital Officer | Buy | 34,705 | $2.6M |
| 2026-08-07 | Maraldo David R. | EVP & Pres. MMD | Sell | 2,686 | $345,736 |
| 2026-08-07 | Maraldo David R. | EVP & Pres. MMD | Sell | 9,709 | $1.2M |
Source: SEC Form 4 filings · as of 2026-08-13