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 |
| 2026-08-13 Sale | 2026-08-13 5:02 pm | Merck & Co. Inc. | MRK | Guindo Chirfi EVP, Access, Policy & Comms | 10,000 | $135 | $1,350,000 | 36,613 (Direct) | View |
| 2026-08-12 Sale | 2026-08-13 4:11 pm | Merck & Co. Inc. | MRK | Zachary Jennifer EVP, General Counsel | 80,315 | $133.46 | $10,718,495 | 45,509 (Direct) | View |
| 2026-08-10 Sale | 2026-08-12 4:10 pm | Merck & Co. Inc. | MRK | DeLuca Richard R. EVP&Pres, Merck Animal Heallth | 45,320 | $131.12 | $5,942,369 | 110,167 (Direct) | View |
| 2026-08-06 Sale | 2026-08-10 4:28 pm | Merck & Co. Inc. | MRK | DeLuca Richard R. EVP&Pres, Merck Animal Heallth | 6,050 | $130.38 | $788,773 | 155,487 (Direct) | View |
| 2026-08-05 Sale | 2026-08-07 4:21 pm | Merck & Co. Inc. | MRK | Maraldo David R. EVP & Pres. MMD | 18,706 | $128.72 | $2,407,797 | 26,740 (Direct) | View |
| 2026-08-05 Sale | 2026-08-07 4:19 pm | Merck & Co. Inc. | MRK | Williams David Michael EVP,Chief Info&Digital Officer | 52,847 | $128.77 | $6,805,145 | 31,716 (Direct) | View |
| 2026-08-06 Sale | 2026-08-07 4:17 pm | Merck & Co. Inc. | MRK | Guindo Chirfi EVP, Access, Policy & Comms | 15,000 | $131 | $1,965,000 | 46,613 (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 |
| 2026-08-12 Exercise | 2026-08-13 4:11 pm | N/A N/A | Merck & Co. Inc. | MRK | Zachary Jennifer EVP, General Counsel | 41,494 | $117.89 | 45,509 (Direct) | View |
| 2026-08-12 Exercise | 2026-08-13 4:11 pm | N/A N/A | Merck & Co. Inc. | MRK | Zachary Jennifer EVP, General Counsel | 13,433 | $84.71 | 45,509 (Direct) | View |
| 2026-08-12 Exercise | 2026-08-13 4:11 pm | 2024-05-02 2033-05-01 | Merck & Co. Inc. | MRK | Zachary Jennifer EVP, General Counsel | 54,927 | $0 | 45,509 (Direct) | View |
| 2026-08-05 Exercise | 2026-08-07 4:21 pm | N/A N/A | Merck & Co. Inc. | MRK | Maraldo David R. EVP & Pres. MMD | 9,709 | $87.1 | 26,740 (Direct) | View |
| 2026-08-05 Exercise | 2026-08-07 4:21 pm | N/A N/A | Merck & Co. Inc. | MRK | Maraldo David R. EVP & Pres. MMD | 6,311 | $73.73 | 26,740 (Direct) | View |
| 2026-08-05 Exercise | 2026-08-07 4:21 pm | N/A N/A | Merck & Co. Inc. | MRK | Maraldo David R. EVP & Pres. MMD | 2,686 | $84.71 | 26,740 (Direct) | View |
| 2026-08-05 Exercise | 2026-08-07 4:21 pm | 2022-05-04 2031-05-03 | Merck & Co. Inc. | MRK | Maraldo David R. EVP & Pres. MMD | 18,706 | $0 | 26,740 (Direct) | View |
| 2026-08-05 Exercise | 2026-08-07 4:19 pm | N/A N/A | Merck & Co. Inc. | MRK | Williams David Michael EVP,Chief Info&Digital Officer | 34,705 | $73.73 | 31,716 (Direct) | View |
| 2026-08-05 Exercise | 2026-08-07 4:19 pm | 2020-05-03 2029-05-02 | Merck & Co. Inc. | MRK | Williams David Michael EVP,Chief Info&Digital Officer | 52,847 | $0 | 31,716 (Direct) | View |
| 2026-08-05 Exercise | 2026-08-07 4:19 pm | N/A N/A | Merck & Co. Inc. | MRK | Williams David Michael EVP,Chief Info&Digital Officer | 4,600 | $77.62 | 31,716 (Direct) | View |
| 2026-08-05 Exercise | 2026-08-07 4:19 pm | N/A N/A | Merck & Co. Inc. | MRK | Williams David Michael EVP,Chief Info&Digital Officer | 13,542 | $75.36 | 31,716 (Direct) | View |
| 2026-06-30 Option Award | 2026-07-01 08:47 am | N/A N/A | Merck & Co. Inc. | MRK | Seidman Christine E Director | 63 | $128.5 | 21,391 (Direct) | View |
| 2026-06-30 Option Award | 2026-07-01 08:44 am | N/A N/A | Merck & Co. Inc. | MRK | Karsanbhai Surendralal Lanca Director | 126 | $128.5 | 5,520 (Direct) | View |
| 2026-06-30 Option Award | 2026-07-01 08:41 am | N/A N/A | Merck & Co. Inc. | MRK | Coe Mary Ellen Director | 233 | $128.5 | 32,009 (Direct) | View |
| 2026-05-29 Option Award | 2026-06-02 4:14 pm | N/A N/A | Merck & Co. Inc. | MRK | Warden Kathy J Director | 1,853 | $118.72 | 18,390 (Direct) | View |
| 2026-05-29 Option Award | 2026-06-02 3:31 pm | N/A N/A | Merck & Co. Inc. | MRK | Karsanbhai Surendralal Lanca Director | 1,853 | $118.72 | 5,393 (Direct) | View |
| 2026-05-29 Option Award | 2026-06-02 2:26 pm | N/A N/A | Merck & Co. Inc. | MRK | Coe Mary Ellen Director | 1,853 | $118.72 | 31,776 (Direct) | View |
| 2026-05-29 Option Award | 2026-06-02 2:21 pm | N/A N/A | Merck & Co. Inc. | MRK | THULIN INGE G Director | 1,853 | $118.72 | 30,403 (Direct) | View |
| 2026-05-29 Option Award | 2026-06-02 2:19 pm | N/A N/A | Merck & Co. Inc. | MRK | Seidman Christine E Director | 1,853 | $118.72 | 21,328 (Direct) | View |
| 2026-05-29 Option Award | 2026-06-02 2:17 pm | N/A N/A | Merck & Co. Inc. | MRK | RUSSO PATRICIA F Director | 1,853 | $118.72 | 75,539 (Direct) | View |
| 2026-05-29 Option Award | 2026-06-02 2:14 pm | N/A N/A | Merck & Co. Inc. | MRK | Rothman Paul Director | 1,853 | $118.72 | 35,045 (Direct) | View |
| 2026-05-29 Option Award | 2026-06-02 2:11 pm | N/A N/A | Merck & Co. Inc. | MRK | Mayo Stephen Director | 1,853 | $118.72 | 14,925 (Direct) | View |
| 2026-05-29 Option Award | 2026-06-02 2:09 pm | N/A N/A | Merck & Co. Inc. | MRK | LAVIZZO-MOUREY RISA J Director | 1,853 | $118.72 | 18,749 (Direct) | View |
| 2026-05-29 Option Award | 2026-06-02 2:05 pm | N/A N/A | Merck & Co. Inc. | MRK | GLOCER THOMAS H Director | 1,853 | $118.72 | 116,012 (Direct) | View |
| 2026-05-29 Option Award | 2026-06-02 2:03 pm | N/A N/A | Merck & Co. Inc. | MRK | Craig Pamela J. Director | 1,853 | $118.72 | 36,660 (Direct) | View |
| 2026-05-29 Option Award | 2026-06-02 1:57 pm | N/A N/A | Merck & Co. Inc. | MRK | BAKER DOUGLAS M JR Director | 1,853 | $118.72 | 27,518 (Direct) | View |
| 2026-05-05 Option Award | 2026-05-07 12:18 pm | 2027-05-05 2029-05-05 | Merck & Co. Inc. | MRK | Zachary Jennifer EVP, General Counsel | 47,376 | $0 | 118,273 (Direct) | View |
| 2026-05-05 Option Award | 2026-05-07 12:14 pm | 2027-05-05 2029-05-05 | Merck & Co. Inc. | MRK | Williams David Michael EVP,Chief Info&Digital Officer | 18,222 | $0 | 49,938 (Direct) | View |
| 2026-05-05 Option Award | 2026-05-07 12:10 pm | 2027-05-05 2029-05-05 | Merck & Co. Inc. | MRK | Litchfield Caroline EVP & CFO | 62,474 | $0 | 154,775 (Direct) | View |
| 2026-05-05 Option Award | 2026-05-07 12:07 pm | 2027-05-05 2029-05-05 | Merck & Co. Inc. | MRK | Li Dean Y Executive VP & President, MRL | 78,092 | $0 | 172,523 (Direct) | View |
| 2026-05-05 Option Award | 2026-05-07 12:03 pm | 2027-05-05 2029-05-05 | Merck & Co. Inc. | MRK | Larson Betty D EVP, Chief HR Officer | 31,237 | $0 | 45,011 (Direct) | View |
| 2026-05-05 Option Award | 2026-05-07 11:56 am | 2027-05-05 2029-05-05 | Merck & Co. Inc. | MRK | DeLuca Richard R. EVP&Pres, Merck Animal Heallth | 46,855 | $0 | 209,713 (Direct) | View |
| 2026-05-05 Option Award | 2026-05-07 11:52 am | 2027-05-05 2029-05-05 | Merck & Co. Inc. | MRK | Davis Robert M Chairman, CEO & President | 187,421 | $0 | 637,772 (Direct) | View |
| 2026-05-05 Option Award | 2026-05-07 11:48 am | 2027-05-05 2029-05-05 | Merck & Co. Inc. | MRK | Foard Brian EVP, Specialty, Pharma, & ID | 77,000 | $0 | 77,000 (Direct) | View |
| 2026-05-05 Option Award | 2026-05-07 11:45 am | 2027-05-05 2029-05-05 | Merck & Co. Inc. | MRK | Maraldo David R. EVP & Pres. MMD | 29,155 | $0 | 55,727 (Direct) | View |
| 2026-05-05 Option Award | 2026-05-07 11:42 am | 2027-05-05 2029-05-05 | Merck & Co. Inc. | MRK | Oosthuizen Johannes Jacobus EVP, Oncology & Int?l | 41,649 | $0 | 63,544 (Direct) | View |
| 2026-05-05 Option Award | 2026-05-07 11:39 am | 2027-05-05 2029-05-05 | Merck & Co. Inc. | MRK | Smart Dalton E. III SVP Fin. - Global Controller | 7,343 | $0 | 16,731 (Direct) | View |
| 2026-05-05 Option Award | 2026-05-07 11:36 am | 2027-05-05 2029-05-05 | Merck & Co. Inc. | MRK | Guindo Chirfi EVP, Access, Policy & Comms | 26,030 | $0 | 87,700 (Direct) | View |
| 2026-05-02 Tax Withholding | 2026-05-05 1:51 pm | N/A N/A | Merck & Co. Inc. | MRK | Smart Dalton E. III SVP Fin. - Global Controller | 132 | $112.16 | 9,388 (Direct) | View |
| 2026-05-02 Exercise | 2026-05-05 1:51 pm | N/A N/A | Merck & Co. Inc. | MRK | Smart Dalton E. III SVP Fin. - Global Controller | 383 | $112.16 | 9,388 (Direct) | View |
| 2026-05-02 Exercise | 2026-05-05 1:51 pm | 2024-05-02 2026-05-02 | Merck & Co. Inc. | MRK | Smart Dalton E. III SVP Fin. - Global Controller | 383 | $0 | 9,388 (Direct) | View |
| 2026-05-02 Tax Withholding | 2026-05-05 1:47 pm | N/A N/A | Merck & Co. Inc. | MRK | Maraldo David R. EVP & Pres. MMD | 159 | $112.16 | 18,212 (Direct) | View |
| 2026-05-02 Exercise | 2026-05-05 1:47 pm | N/A N/A | Merck & Co. Inc. | MRK | Maraldo David R. EVP & Pres. MMD | 552 | $112.16 | 18,212 (Direct) | View |
| 2026-05-02 Exercise | 2026-05-05 1:47 pm | 2024-05-02 2026-05-02 | Merck & Co. Inc. | MRK | Maraldo David R. EVP & Pres. MMD | 552 | $0 | 18,212 (Direct) | View |
Ownership(A) | 2026-05-05 1:08 pm | N/A N/A | Merck & Co. Inc. | MRK | Maraldo David R. EVP & Pres. MMD | 0 | $0 | 74,686 (Direct) | View |
Ownership | 2026-05-04 6:28 pm | N/A N/A | Merck & Co. Inc. | MRK | Maraldo David R. EVP & Pres. MMD | 0 | $0 | 74,686 (Direct) | View |
| 2026-04-29 Exercise | 2026-05-01 6:54 pm | N/A N/A | Merck & Co. Inc. | MRK | Guindo Chirfi EVP, Access, Policy & Comms | 1,967 | $110.03 | 65,605 (Direct) | View |
| 2026-04-29 Exercise | 2026-05-01 6:54 pm | 2026-04-29 2028-04-29 | Merck & Co. Inc. | MRK | Guindo Chirfi EVP, Access, Policy & Comms | 1,967 | $0 | 65,605 (Direct) | View |
| 2026-04-29 Tax Withholding | 2026-05-01 6:54 pm | N/A N/A | Merck & Co. Inc. | MRK | Guindo Chirfi EVP, Access, Policy & Comms | 969 | $110.03 | 65,605 (Direct) | View |
| 2026-04-29 Exercise | 2026-05-01 6:32 pm | N/A N/A | Merck & Co. Inc. | MRK | Chattopadhyay Sanat Exe V-P & Pres. MMD | 2,597 | $110.03 | 205,869 (Direct) | View |
| 2026-04-29 Exercise | 2026-05-01 6:32 pm | 2026-04-29 2028-04-29 | Merck & Co. Inc. | MRK | Chattopadhyay Sanat Exe V-P & Pres. MMD | 2,597 | $0 | 205,869 (Direct) | View |
| 2026-04-29 Tax Withholding | 2026-05-01 6:32 pm | N/A N/A | Merck & Co. Inc. | MRK | Chattopadhyay Sanat Exe V-P & Pres. MMD | 1,130 | $110.03 | 205,869 (Direct) | View |