Real time insider trading transaction history:
- Insiders are prohibited from making short-swing profits by trading their shares within 6 months of the registration or acquiring the shares.
- Shares are not adjusted for stock split.
"Insiders might sell their shares for any number of reasons, but they buy them for only one: they think the price will rise"
- Peter Lynch
What is insider trading>>
- Peter Lynch
What is insider trading>>
Common stock purchase or sale:
| Transaction Date | Reported DateTime | Company | Symbol | Insider Relationship | Shares Traded | Average Price | Total Amount | Shares Owned | Filing |
| 2026-02-12 Sale | 2026-02-12 4:02 pm | Merck & Co. Inc. | MRK | Guindo Chirfi Chief Marketing Officer | 10,000 | $121.46 | $1,214,562 | 60,615 (Direct) | View |
| 2026-02-10 Sale | 2026-02-10 4:04 pm | Merck & Co. Inc. | MRK | Li Dean Y Executive VP & President, MRL | 10,235 | $117.52 | $1,202,844 | 92,035 (Direct) | View |
| 2026-02-09 Sale | 2026-02-09 4:04 pm | Merck & Co. Inc. | MRK | Guindo Chirfi Chief Marketing Officer | 10,000 | $118.41 | $1,184,101 | 70,615 (Direct) | View |
| 2026-02-09 Sale | 2026-02-09 4:01 pm | Merck & Co. Inc. | MRK | Zachary Jennifer EVP, General Counsel | 121,573 | $119.15 | $14,485,690 | 68,916 (Direct) | View |
| 2026-02-06 Sale | 2026-02-06 4:20 pm | Merck & Co. Inc. | MRK | Williams David Michael EVP,Chief Info&Digital Officer | 5,000 | $121.91 | $609,525 | 35,438 (Direct) | View |
| 2026-02-04 Sale | 2026-02-06 4:18 pm | Merck & Co. Inc. | MRK | Smart Dalton E. III SVP Fin. - Global Controller | 6,400 | $119.67 | $765,920 | 16,335 (Direct) | View |
| 2026-02-06 Sale | 2026-02-06 4:15 pm | Merck & Co. Inc. | MRK | Oosthuizen Johannes Jacobus President, U.S. Market | 15,000 | $121.87 | $1,827,992 | 21,197 (Direct) | View |
| 2026-02-04 Sale | 2026-02-06 4:13 pm | Merck & Co. Inc. | MRK | Litchfield Caroline EVP & CFO | 41,997 | $119.61 | $5,023,312 | 90,192 (Direct) | View |
| 2026-02-04 Sale | 2026-02-06 4:12 pm | Merck & Co. Inc. | MRK | Li Dean Y Executive VP & President, MRL | 15,087 | $118.77 | $1,791,824 | 102,270 (Direct) | View |
| 2026-02-05 Sale | 2026-02-06 4:10 pm | Merck & Co. Inc. | MRK | Guindo Chirfi Chief Marketing Officer | 20,000 | $121.88 | $2,437,676 | 80,615 (Direct) | View |
| 2026-02-06 Sale | 2026-02-06 4:08 pm | Merck & Co. Inc. | MRK | DeLuca Richard R. EVP&Pres, Merck Animal Heallth | 37,685 | $120.92 | $4,557,025 | 160,174 (Direct) | View |
| 2026-02-04 Sale | 2026-02-06 4:05 pm | Merck & Co. Inc. | MRK | Davis Robert M Chairman, CEO & President | 47,434 | $118.04 | $5,599,327 | 443,602 (Direct) | View |
| 2025-11-10 Sale | 2025-11-12 4:01 pm | Merck & Co. Inc. | MRK | Downing Cristal N Chief Comm. & Public Afrs Ofcr | 7,085 | $87 | $616,395 | 0 (Direct) | View |
| 2025-11-03 Sale | 2025-11-04 4:02 pm | Merck & Co. Inc. | MRK | Williams David Michael EVP,Chief Info&Digital Officer | 8,614 | $83.59 | $720,040 | 24,578 (Direct) | View |
Stock options: Exercise, Award, Grant, Conversion
| Transaction Date | Reported DateTime | Exercisable Expiration | Company | Symnbol | Insider Relationship | Shares Traded | Conversion Price | Shares Owned | Filing |
| 2026-02-09 Exercise | 2026-02-09 4:01 pm | 2021-05-01 2030-04-30 | Merck & Co. Inc. | MRK | Zachary Jennifer EVP, General Counsel | 121,573 | $0 | 68,916 (Direct) | View |
| 2026-02-09 Exercise | 2026-02-09 4:01 pm | N/A N/A | Merck & Co. Inc. | MRK | Zachary Jennifer EVP, General Counsel | 121,573 | $119.15 | 68,916 (Direct) | View |
| 2026-02-06 Exercise | 2026-02-06 4:20 pm | N/A N/A | Merck & Co. Inc. | MRK | Williams David Michael EVP,Chief Info&Digital Officer | 5,000 | $77.62 | 35,438 (Direct) | View |
| 2026-02-06 Exercise | 2026-02-06 4:20 pm | 2020-05-03 2029-05-02 | Merck & Co. Inc. | MRK | Williams David Michael EVP,Chief Info&Digital Officer | 5,000 | $0 | 35,438 (Direct) | View |
| 2026-02-04 Exercise | 2026-02-06 4:18 pm | N/A N/A | Merck & Co. Inc. | MRK | Smart Dalton E. III SVP Fin. - Global Controller | 4,000 | $62.07 | 16,335 (Direct) | View |
| 2026-02-04 Exercise | 2026-02-06 4:18 pm | 2018-05-05 2027-05-04 | Merck & Co. Inc. | MRK | Smart Dalton E. III SVP Fin. - Global Controller | 4,000 | $0 | 16,335 (Direct) | View |
| 2026-02-04 Exercise | 2026-02-06 4:13 pm | N/A N/A | Merck & Co. Inc. | MRK | Litchfield Caroline EVP & CFO | 41,997 | $53.06 | 90,192 (Direct) | View |
| 2026-02-04 Exercise | 2026-02-06 4:13 pm | 2017-05-10 2026-05-09 | Merck & Co. Inc. | MRK | Litchfield Caroline EVP & CFO | 41,997 | $0 | 90,192 (Direct) | View |
| 2026-02-04 Exercise | 2026-02-06 4:12 pm | N/A N/A | Merck & Co. Inc. | MRK | Li Dean Y Executive VP & President, MRL | 15,087 | $56.04 | 102,270 (Direct) | View |
| 2026-02-04 Exercise | 2026-02-06 4:12 pm | 2019-05-04 2028-05-03 | Merck & Co. Inc. | MRK | Li Dean Y Executive VP & President, MRL | 15,087 | $0 | 102,270 (Direct) | View |
| 2026-01-26 Option Award | 2026-01-28 4:19 pm | N/A N/A | Merck & Co. Inc. | MRK | Zachary Jennifer EVP, General Counsel | 11,583 | $107.4 | 68,916 (Direct) | View |
| 2026-01-26 Option Award | 2026-01-28 4:18 pm | N/A N/A | Merck & Co. Inc. | MRK | Williams David Michael EVP,Chief Info&Digital Officer | 6,112 | $107.4 | 30,838 (Direct) | View |
| 2026-01-26 Option Award | 2026-01-28 4:16 pm | N/A N/A | Merck & Co. Inc. | MRK | Smart Dalton E. III SVP Fin. - Global Controller | 1,066 | $107.4 | 10,605 (Direct) | View |
| 2026-01-26 Option Award | 2026-01-28 4:14 pm | N/A N/A | Merck & Co. Inc. | MRK | Romanelli Joseph President, Human Health Int?l | 5,703 | $107.4 | 28,739 (Direct) | View |
| 2026-01-26 Option Award | 2026-01-28 4:12 pm | N/A N/A | Merck & Co. Inc. | MRK | Oosthuizen Johannes Jacobus President, U.S. Market | 5,026 | $107.4 | 36,197 (Direct) | View |
| 2026-01-26 Option Award | 2026-01-28 4:10 pm | N/A N/A | Merck & Co. Inc. | MRK | Litchfield Caroline EVP & CFO | 15,852 | $107.4 | 90,192 (Direct) | View |
| 2026-01-26 Option Award | 2026-01-28 4:09 pm | N/A N/A | Merck & Co. Inc. | MRK | Li Dean Y Executive VP & President, MRL | 20,469 | $107.4 | 102,270 (Direct) | View |
| 2026-01-26 Option Award | 2026-01-28 4:08 pm | N/A N/A | Merck & Co. Inc. | MRK | Guindo Chirfi Chief Marketing Officer | 9,865 | $107.4 | 100,672 (Direct) | View |
| 2026-01-26 Option Award | 2026-01-28 4:05 pm | N/A N/A | Merck & Co. Inc. | MRK | DeLuca Richard R. EVP&Pres, Merck Animal Heallth | 12,264 | $107.4 | 199,171 (Direct) | View |
| 2026-01-26 Option Award | 2026-01-28 4:03 pm | N/A N/A | Merck & Co. Inc. | MRK | Davis Robert M Chairman, CEO & President | 47,434 | $107.4 | 491,036 (Direct) | View |
| 2026-01-26 Option Award | 2026-01-28 4:01 pm | N/A N/A | Merck & Co. Inc. | MRK | Chattopadhyay Sanat Exe V-P & Pres. MMD | 13,880 | $107.4 | 199,208 (Direct) | View |
| 2025-12-31 Option Award | 2026-01-05 12:22 pm | N/A N/A | Merck & Co. Inc. | MRK | Seidman Christine E Director | 77 | $105.26 | 19,126 (Direct) | View |
| 2025-12-31 Option Award | 2026-01-05 12:20 pm | N/A N/A | Merck & Co. Inc. | MRK | GLOCER THOMAS H Director | 463 | $105.26 | 112,176 (Direct) | View |
| 2025-12-31 Option Award | 2026-01-05 12:16 pm | N/A N/A | Merck & Co. Inc. | MRK | Coe Mary Ellen Director | 285 | $105.26 | 29,242 (Direct) | View |
| 2025-09-30 Option Award | 2025-10-02 09:31 am | N/A N/A | Merck & Co. Inc. | MRK | Seidman Christine E Director | 97 | $83.93 | 18,876 (Direct) | View |
| 2025-09-30 Option Award | 2025-10-02 09:29 am | N/A N/A | Merck & Co. Inc. | MRK | GLOCER THOMAS H Director | 581 | $83.93 | 110,746 (Direct) | View |
| 2025-09-30 Option Award | 2025-10-02 09:28 am | N/A N/A | Merck & Co. Inc. | MRK | Coe Mary Ellen Director | 357 | $83.93 | 28,695 (Direct) | View |
| 2025-08-04 Exercise | 2025-08-05 08:46 am | 2025-08-03 2025-08-03 | Merck & Co. Inc. | MRK | Williams David Michael EVP,Chief Info&Digital Officer | 17,119 | $0 | 33,013 (Direct) | View |
| 2025-08-04 Exercise | 2025-08-05 08:46 am | N/A N/A | Merck & Co. Inc. | MRK | Williams David Michael EVP,Chief Info&Digital Officer | 17,119 | $79.29 | 33,013 (Direct) | View |
| 2025-08-04 Tax Withholding | 2025-08-05 08:46 am | N/A N/A | Merck & Co. Inc. | MRK | Williams David Michael EVP,Chief Info&Digital Officer | 8,432 | $79.29 | 33,013 (Direct) | View |
| 2025-08-04 Exercise | 2025-08-05 08:43 am | 2023-08-03 2025-08-03 | Merck & Co. Inc. | MRK | Guindo Chirfi Chief Marketing Officer | 36,903 | $0 | 89,290 (Direct) | View |
| 2025-08-04 Exercise | 2025-08-05 08:43 am | N/A N/A | Merck & Co. Inc. | MRK | Guindo Chirfi Chief Marketing Officer | 36,903 | $79.29 | 89,290 (Direct) | View |
| 2025-08-04 Tax Withholding | 2025-08-05 08:43 am | N/A N/A | Merck & Co. Inc. | MRK | Guindo Chirfi Chief Marketing Officer | 18,175 | $79.29 | 89,290 (Direct) | View |
| 2025-06-30 Option Award | 2025-07-02 12:08 pm | N/A N/A | Merck & Co. Inc. | MRK | Seidman Christine E Director | 103 | $79.16 | 18,596 (Direct) | View |
| 2025-06-30 Option Award | 2025-07-02 12:06 pm | N/A N/A | Merck & Co. Inc. | MRK | GLOCER THOMAS H Director | 616 | $79.16 | 109,141 (Direct) | View |
| 2025-06-30 Option Award | 2025-07-02 12:04 pm | N/A N/A | Merck & Co. Inc. | MRK | Coe Mary Ellen Director | 379 | $79.16 | 28,062 (Direct) | View |
| 2025-05-30 Option Award | 2025-06-03 1:45 pm | N/A N/A | Merck & Co. Inc. | MRK | Warden Kathy J Director | 2,863 | $76.84 | 16,004 (Direct) | View |
| 2025-05-30 Option Award | 2025-06-03 1:25 pm | N/A N/A | Merck & Co. Inc. | MRK | THULIN INGE G Director | 2,863 | $76.84 | 27,697 (Direct) | View |
| 2025-05-30 Option Award | 2025-06-03 1:22 pm | N/A N/A | Merck & Co. Inc. | MRK | Seidman Christine E Director | 2,863 | $76.84 | 18,493 (Direct) | View |
| 2025-05-30 Option Award | 2025-06-03 1:21 pm | N/A N/A | Merck & Co. Inc. | MRK | RUSSO PATRICIA F Director | 2,863 | $76.84 | 71,671 (Direct) | View |