Merck & Co., Inc. (MRK) · Insider trading
What Merck's directors, officers and largest holders bought and sold themselves, from the Form 4 each of them files with the SEC within two business days of a trade. Open-market purchases and sales first: those are the trades somebody chose to make at the market price.
Bought, 12 months
$0
0 insiders, 0 trades
Sold, 12 months
$72.01M
11 insiders, 0% under a plan
Net, 12 months
−$72.01M
bought less sold
Latest filing
2026-08-13
filings read to 2026-10-19
Who traded, two years
| Insider | Bought | Sold | Trades | Last trade | Holds after |
|---|---|---|---|---|---|
| Zachary JenniferEVP, General Counsel | – | $25.20M | 4 | 2026-08-12 | 45,509 |
| DeLuca Richard R.EVP&Pres, Merck Animal Heallth | – | $11.29M | 9 | 2026-08-12 | 110,767 |
| Williams David MichaelEVP,Chief Info&Digital Officer | – | $8.65M | 6 | 2026-08-05 | 31,716 |
| Guindo ChirfiEVP, Access, Policy & Comms | – | $8.15M | 5 | 2026-08-13 | 36,613 |
| Davis Robert MDirector, Chairman, CEO & President | – | $5.60M | 2 | 2026-02-04 | 476,064 |
| Litchfield CarolineEVP & CFO | – | $5.02M | 1 | 2026-02-04 | 90,192 |
| Li Dean YExecutive VP & President, MRL | – | $2.99M | 2 | 2026-02-10 | 92,035 |
| Oosthuizen Johannes JacobusPresident, U.S. Market | – | $2.54M | 2 | 2026-02-06 | 21,197 |
| Maraldo David R.EVP & Pres. MMD | – | $2.41M | 3 | 2026-08-05 | 18,212 |
| Baker Douglas M JrDirector | $1.33M | – | 1 | 2025-02-05 | 16,000 |
| Smart Dalton E. IIISVP Fin. - Global Controller | – | $1.12M | 3 | 2026-02-04 | 10,605 |
| Downing Cristal NChief Comm. & Public Afrs Ofcr | – | $825,957 | 2 | 2025-11-10 | 0 |
| Thulin Inge GDirector | $250,000 | – | 1 | 2025-02-06 | 2,933 |
Open-market purchases and sales
Newest first. “Plan” marks a trade made under a 10b5-1 plan set up in advance.
| Date | Insider | Trade | Shares | Price | Value | Holds after | Filing |
|---|---|---|---|---|---|---|---|
| 2026-08-13 | Guindo ChirfiEVP, Access, Policy & Comms | Sale | 10,000 | 135.00 | $1.35M | 36,613 | Form 4 |
| 2026-08-12 | Zachary JenniferEVP, General Counsel | Sale | 80,315 | 133.46 | $10.72M | 45,509 | Form 4 |
| 2026-08-12 | DeLuca Richard R.EVP&Pres, Merck Animal Heallth | Sale | 11,099 | 131.61 | $1.46M | 110,767 | Form 4 |
| 2026-08-12 | DeLuca Richard R.EVP&Pres, Merck Animal Heallth | Sale | 600 | 132.04 | $79,224 | 110,167 | Form 4 |
| 2026-08-11 | DeLuca Richard R.EVP&Pres, Merck Animal Heallth | Sale | 7,410 | 131.33 | $973,155 | 127,293 | Form 4 |
| 2026-08-11 | DeLuca Richard R.EVP&Pres, Merck Animal Heallth | Sale | 5,427 | 132.35 | $718,263 | 121,866 | Form 4 |
| 2026-08-10 | DeLuca Richard R.EVP&Pres, Merck Animal Heallth | Sale | 20,784 | 130.43 | $2.71M | 134,703 | Form 4 |
| 2026-08-06 | DeLuca Richard R.EVP&Pres, Merck Animal Heallth | Sale | 805 | 131.02 | $105,471 | 160,732 | Form 4 |
| 2026-08-06 | DeLuca Richard R.EVP&Pres, Merck Animal Heallth | Sale | 4,945 | 130.23 | $643,987 | 155,787 | Form 4 |
| 2026-08-06 | DeLuca Richard R.EVP&Pres, Merck Animal Heallth | Sale | 300 | 131.02 | $39,306 | 155,487 | Form 4 |
| 2026-08-06 | Guindo ChirfiEVP, Access, Policy & Comms | Sale | 15,000 | 131.00 | $1.97M | 46,613 | Form 4 |
| 2026-08-05 | Williams David MichaelEVP,Chief Info&Digital Officer | Sale | 4,600 | 128.77 | $592,342 | 31,716 | Form 4 |
| 2026-08-05 | Williams David MichaelEVP,Chief Info&Digital Officer | Sale | 13,542 | 128.77 | $1.74M | 31,716 | Form 4 |
| 2026-08-05 | Williams David MichaelEVP,Chief Info&Digital Officer | Sale | 34,705 | 128.77 | $4.47M | 31,716 | Form 4 |
| 2026-08-05 | Maraldo David R.EVP & Pres. MMD | Sale | 6,311 | 128.72 | $812,352 | 18,212 | Form 4 |
| 2026-08-05 | Maraldo David R.EVP & Pres. MMD | Sale | 9,709 | 128.72 | $1.25M | 18,212 | Form 4 |
| 2026-08-05 | Maraldo David R.EVP & Pres. MMD | Sale | 2,686 | 128.72 | $345,742 | 18,212 | Form 4 |
| 2026-02-12 | Guindo ChirfiChief Marketing Officer | Sale | 10,000 | 121.46 | $1.21M | 60,615 | Form 4 |
| 2026-02-10 | Li Dean YExecutive VP & President, MRL | Sale | 10,235 | 117.52 | $1.20M | 92,035 | Form 4 |
| 2026-02-09 | Zachary JenniferEVP, General Counsel | Sale | 25,946 | 119.15 | $3.09M | 68,916 | Form 4 |
| 2026-02-09 | Zachary JenniferEVP, General Counsel | Sale | 56,792 | 119.15 | $6.77M | 68,916 | Form 4 |
| 2026-02-09 | Zachary JenniferEVP, General Counsel | Sale | 38,835 | 119.15 | $4.63M | 68,916 | Form 4 |
| 2026-02-09 | Guindo ChirfiChief Marketing Officer | Sale | 10,000 | 118.41 | $1.18M | 70,615 | Form 4 |
| 2026-02-06 | DeLuca Richard R.EVP&Pres, Merck Animal Heallth | Sale | 37,685 | 120.92 | $4.56M | 160,174 | Form 4 |
| 2026-02-06 | Oosthuizen Johannes JacobusPresident, U.S. Market | Sale | 15,000 | 121.87 | $1.83M | 21,197 | Form 4 |
| 2026-02-06 | Williams David MichaelEVP,Chief Info&Digital Officer | Sale | 5,000 | 121.91 | $609,550 | 30,838 | Form 4 |
| 2026-02-05 | Guindo ChirfiChief Marketing Officer | Sale | 20,000 | 121.88 | $2.44M | 80,615 | Form 4 |
| 2026-02-04 | Davis Robert MDirector, Chairman, CEO & President | Sale | 14,972 | 117.38 | $1.76M | 476,064 | Form 4 |
| 2026-02-04 | Davis Robert MDirector, Chairman, CEO & President | Sale | 32,462 | 118.35 | $3.84M | 443,602 | Form 4 |
| 2026-02-04 | Li Dean YExecutive VP & President, MRL | Sale | 15,087 | 118.77 | $1.79M | 102,270 | Form 4 |
| 2026-02-04 | Litchfield CarolineEVP & CFO | Sale | 41,997 | 119.61 | $5.02M | 90,192 | Form 4 |
| 2026-02-04 | Smart Dalton E. IIISVP Fin. - Global Controller | Sale | 4,000 | 119.68 | $478,720 | 10,605 | Form 4 |
| 2026-02-04 | Smart Dalton E. IIISVP Fin. - Global Controller | Sale | 2,400 | 119.68 | $287,232 | 8,205 | Form 4 |
| 2025-11-10 | Downing Cristal NChief Comm. & Public Afrs Ofcr | Sale | 7,085 | 87.00 | $616,395 | 0 | Form 4 |
| 2025-11-03 | Williams David MichaelEVP,Chief Info&Digital Officer | Sale | 8,614 | 83.59 | $720,044 | 24,578 | Form 4 |
| 2025-04-25 | Smart Dalton E. IIISVP Fin. - Global Controller | Sale | 4,262 | 82.76 | $352,723 | 7,778 | Form 4 |
| 2025-02-19 | Oosthuizen Johannes JacobusPresident, U.S. Market | Sale | 8,500 | 84.09 | $714,765 | 30,705 | Form 4 |
| 2025-02-13 | Williams David MichaelEVP,Chief Info&Digital Officer | Sale | 6,000 | 85.34 | $512,040 | 24,123 | Form 4 |
| 2025-02-06 | Downing Cristal NChief Comm. & Public Afrs Ofcr | Sale | 2,361 | 88.76 | $209,562 | 7,085 | Form 4 |
| 2025-02-06 | Thulin Inge GDirector | Buy | 2,833 | 88.25 | $250,000 | 2,933 | Form 4 |
1 more
| 2025-02-05 | Baker Douglas M JrDirector | Buy | 15,000 | 88.50 | $1.33M | 16,000 | Form 4 |
Grants, exercises and other transactions
Pay, tax and paperwork rather than a choice to trade at the market price. Two years.
41 × option exercise25 × shares withheld for tax22 × grant or award
Show them
| Date | Insider | What | Shares | Price | Holds after | Filing |
|---|---|---|---|---|---|---|
| 2026-08-12 | Zachary JenniferEVP, General Counsel | Option exercise M | +41,494 | 117.89 | 112,391 | Form 4 |
| 2026-08-12 | Zachary JenniferEVP, General Counsel | Option exercise M | +13,433 | 84.71 | 125,824 | Form 4 |
| 2026-08-05 | Williams David MichaelEVP,Chief Info&Digital Officer | Option exercise M | +4,600 | 77.62 | 36,316 | Form 4 |
| 2026-08-05 | Williams David MichaelEVP,Chief Info&Digital Officer | Option exercise M | +13,542 | 75.36 | 45,258 | Form 4 |
| 2026-08-05 | Williams David MichaelEVP,Chief Info&Digital Officer | Option exercise M | +34,705 | 73.73 | 66,421 | Form 4 |
| 2026-08-05 | Maraldo David R.EVP & Pres. MMD | Option exercise M | +6,311 | 73.73 | 24,523 | Form 4 |
| 2026-08-05 | Maraldo David R.EVP & Pres. MMD | Option exercise M | +9,709 | 87.10 | 27,921 | Form 4 |
| 2026-08-05 | Maraldo David R.EVP & Pres. MMD | Option exercise M | +2,686 | 84.71 | 20,898 | Form 4 |
| 2026-05-02 | Maraldo David R.EVP & Pres. MMD | Option exercise M | +552 | 112.16 | 18,371 | Form 4 |
| 2026-05-02 | Maraldo David R.EVP & Pres. MMD | Shares withheld for tax F | −159 | 112.16 | 18,212 | Form 4 |
| 2026-05-02 | Smart Dalton E. IIISVP Fin. - Global Controller | Option exercise M | +383 | 112.16 | 9,520 | Form 4 |
| 2026-05-02 | Smart Dalton E. IIISVP Fin. - Global Controller | Shares withheld for tax F | −132 | 112.16 | 9,388 | Form 4 |
| 2026-04-30 | Larson Betty DEVP, Chief HR Officer | Option exercise M | +11,350 | 110.95 | 18,917 | Form 4 |
| 2026-04-30 | Larson Betty DEVP, Chief HR Officer | Shares withheld for tax F | −5,143 | 110.95 | 13,774 | Form 4 |
| 2026-04-30 | Smart Dalton E. IIISVP Fin. - Global Controller | Option exercise M | +464 | 110.95 | 9,296 | Form 4 |
| 2026-04-30 | Smart Dalton E. IIISVP Fin. - Global Controller | Shares withheld for tax F | −159 | 110.95 | 9,137 | Form 4 |
| 2026-04-29 | Oosthuizen Johannes JacobusEVP, Oncology & Int?l | Option exercise M | +1,377 | 110.03 | 22,574 | Form 4 |
| 2026-04-29 | Oosthuizen Johannes JacobusEVP, Oncology & Int?l | Shares withheld for tax F | −679 | 110.03 | 21,895 | Form 4 |
| 2026-04-29 | Davis Robert MDirector, Chairman, CEO & President | Option exercise M | +13,300 | 110.03 | 456,902 | Form 4 |
| 2026-04-29 | Davis Robert MDirector, Chairman, CEO & President | Shares withheld for tax F | −6,551 | 110.03 | 450,351 | Form 4 |
| 2026-04-29 | Litchfield CarolineEVP & CFO | Option exercise M | +3,935 | 110.03 | 94,239 | Form 4 |
| 2026-04-29 | Litchfield CarolineEVP & CFO | Shares withheld for tax F | −1,938 | 110.03 | 92,301 | Form 4 |
| 2026-04-29 | Larson Betty DEVP, Chief HR Officer | Option exercise M | +2,085 | 110.03 | 8,282 | Form 4 |
| 2026-04-29 | Larson Betty DEVP, Chief HR Officer | Shares withheld for tax F | −715 | 110.03 | 7,567 | Form 4 |
| 2026-04-29 | Zachary JenniferEVP, General Counsel | Option exercise M | +2,951 | 110.03 | 72,351 | Form 4 |
| 2026-04-29 | Zachary JenniferEVP, General Counsel | Shares withheld for tax F | −1,454 | 110.03 | 70,897 | Form 4 |
| 2026-04-29 | Li Dean YExecutive VP & President, MRL | Option exercise M | +4,722 | 110.03 | 96,757 | Form 4 |
| 2026-04-29 | Li Dean YExecutive VP & President, MRL | Shares withheld for tax F | −2,326 | 110.03 | 94,431 | Form 4 |
| 2026-04-29 | Smart Dalton E. IIISVP Fin. - Global Controller | Option exercise M | +944 | 110.03 | 9,156 | Form 4 |
| 2026-04-29 | Smart Dalton E. IIISVP Fin. - Global Controller | Shares withheld for tax F | −324 | 110.03 | 8,832 | Form 4 |
| 2026-04-29 | Williams David MichaelEVP,Chief Info&Digital Officer | Option exercise M | +1,377 | 110.03 | 32,395 | Form 4 |
| 2026-04-29 | Williams David MichaelEVP,Chief Info&Digital Officer | Shares withheld for tax F | −679 | 110.03 | 31,716 | Form 4 |
| 2026-04-29 | DeLuca Richard R.EVP&Pres, Merck Animal Heallth | Option exercise M | +2,518 | 110.03 | 162,778 | Form 4 |
| 2026-04-29 | DeLuca Richard R.EVP&Pres, Merck Animal Heallth | Shares withheld for tax F | −1,241 | 110.03 | 161,537 | Form 4 |
| 2026-04-29 | Chattopadhyay SanatExe V-P & Pres. MMD | Option exercise M | +2,597 | 110.03 | 16,477 | Form 4 |
| 2026-04-29 | Chattopadhyay SanatExe V-P & Pres. MMD | Shares withheld for tax F | −1,130 | 110.03 | 15,347 | Form 4 |
| 2026-04-29 | Guindo ChirfiEVP, Access, Policy & Comms | Option exercise M | +1,967 | 110.03 | 62,582 | Form 4 |
| 2026-04-29 | Guindo ChirfiEVP, Access, Policy & Comms | Shares withheld for tax F | −969 | 110.03 | 61,613 | Form 4 |
| 2026-02-09 | Zachary JenniferEVP, General Counsel | Option exercise M | +25,946 | 119.15 | 94,862 | Form 4 |
| 2026-02-09 | Zachary JenniferEVP, General Counsel | Option exercise M | +56,792 | 119.15 | 125,708 | Form 4 |
| 2026-02-09 | Zachary JenniferEVP, General Counsel | Option exercise M | +38,835 | 119.15 | 107,751 | Form 4 |
| 2026-02-06 | Williams David MichaelEVP,Chief Info&Digital Officer | Option exercise M | +5,000 | 77.62 | 35,838 | Form 4 |
| 2026-02-04 | Li Dean YExecutive VP & President, MRL | Option exercise M | +15,087 | 56.04 | 117,357 | Form 4 |
| 2026-02-04 | Litchfield CarolineEVP & CFO | Option exercise M | +41,997 | 53.06 | 132,189 | Form 4 |
| 2026-02-04 | Smart Dalton E. IIISVP Fin. - Global Controller | Option exercise M | +4,000 | 62.07 | 14,605 | Form 4 |
| 2026-01-26 | Chattopadhyay SanatExe V-P & Pres. MMD | Grant or award A | +13,880 | 107.40 | 13,880 | Form 4 |
| 2026-01-26 | Davis Robert MDirector, Chairman, CEO & President | Grant or award A | +47,434 | 107.40 | 491,036 | Form 4 |
| 2026-01-26 | DeLuca Richard R.EVP&Pres, Merck Animal Heallth | Grant or award A | +12,264 | 107.40 | 197,859 | Form 4 |
| 2026-01-26 | Guindo ChirfiChief Marketing Officer | Grant or award A | +9,865 | 107.40 | 100,615 | Form 4 |
| 2026-01-26 | Li Dean YExecutive VP & President, MRL | Grant or award A | +20,469 | 107.40 | 102,270 | Form 4 |
| 2026-01-26 | Litchfield CarolineEVP & CFO | Grant or award A | +15,852 | 107.40 | 90,192 | Form 4 |
| 2026-01-26 | Oosthuizen Johannes JacobusPresident, U.S. Market | Grant or award A | +5,026 | 107.40 | 36,197 | Form 4 |
| 2026-01-26 | Romanelli JosephPresident, Human Health Int?l | Grant or award A | +5,703 | 107.40 | 28,739 | Form 4 |
| 2026-01-26 | Smart Dalton E. IIISVP Fin. - Global Controller | Grant or award A | +1,066 | 107.40 | 10,605 | Form 4 |
| 2026-01-26 | Williams David MichaelEVP,Chief Info&Digital Officer | Grant or award A | +6,112 | 107.40 | 30,838 | Form 4 |
| 2026-01-26 | Zachary JenniferEVP, General Counsel | Grant or award A | +11,583 | 107.40 | 68,916 | Form 4 |
| 2025-08-04 | Guindo ChirfiChief Marketing Officer | Option exercise M | +36,903 | 79.29 | 107,409 | Form 4 |
| 2025-08-04 | Guindo ChirfiChief Marketing Officer | Shares withheld for tax F | −18,175 | 79.29 | 89,234 | Form 4 |
| 2025-08-04 | Williams David MichaelEVP,Chief Info&Digital Officer | Option exercise M | +17,119 | 79.29 | 41,445 | Form 4 |
| 2025-08-04 | Williams David MichaelEVP,Chief Info&Digital Officer | Shares withheld for tax F | −8,432 | 79.29 | 33,013 | Form 4 |
| 2025-05-03 | Smart Dalton E. IIISVP Fin. - Global Controller | Option exercise M | +518 | 83.18 | 8,851 | Form 4 |
| 2025-05-03 | Smart Dalton E. IIISVP Fin. - Global Controller | Shares withheld for tax F | −256 | 83.18 | 8,595 | Form 4 |
| 2025-05-03 | Smart Dalton E. IIISVP Fin. - Global Controller | Option exercise M | +1,532 | 83.18 | 10,127 | Form 4 |
| 2025-05-03 | Smart Dalton E. IIISVP Fin. - Global Controller | Shares withheld for tax F | −588 | 83.18 | 9,539 | Form 4 |
| 2025-05-02 | Romanelli JosephPresident, Human Health Int?l | Option exercise M | +2,262 | 83.26 | 24,061 | Form 4 |
| 2025-05-02 | Romanelli JosephPresident, Human Health Int?l | Shares withheld for tax F | −1,115 | 83.26 | 22,946 | Form 4 |
| 2025-05-02 | Smart Dalton E. IIISVP Fin. - Global Controller | Option exercise M | +381 | 83.26 | 8,464 | Form 4 |
| 2025-05-02 | Smart Dalton E. IIISVP Fin. - Global Controller | Shares withheld for tax F | −131 | 83.26 | 8,333 | Form 4 |
| 2025-04-30 | Larson Betty DEVP, Chief HR Officer | Option exercise M | +11,350 | 84.71 | 11,350 | Form 4 |
| 2025-04-30 | Larson Betty DEVP, Chief HR Officer | Shares withheld for tax F | −5,153 | 84.71 | 6,197 | Form 4 |
| 2025-04-30 | Romanelli JosephPresident, Human Health Int?l | Option exercise M | +2,063 | 84.71 | 22,816 | Form 4 |
| 2025-04-30 | Romanelli JosephPresident, Human Health Int?l | Shares withheld for tax F | −1,017 | 84.71 | 21,799 | Form 4 |
| 2025-04-30 | Smart Dalton E. IIISVP Fin. - Global Controller | Option exercise M | +464 | 84.71 | 8,242 | Form 4 |
| 2025-04-30 | Smart Dalton E. IIISVP Fin. - Global Controller | Shares withheld for tax F | −159 | 84.71 | 8,083 | Form 4 |
| 2025-04-25 | Smart Dalton E. IIISVP Fin. - Global Controller | Option exercise M | +5,000 | 58.08 | 12,040 | Form 4 |
| 2025-02-08 | Oosthuizen Johannes JacobusPresident, U.S. Market | Option exercise M | +13,002 | 87.28 | 45,609 | Form 4 |
| 2025-02-08 | Oosthuizen Johannes JacobusPresident, U.S. Market | Shares withheld for tax F | −6,404 | 87.28 | 39,205 | Form 4 |
| 2025-01-27 | Guindo ChirfiChief Marketing Officer | Grant or award A | +28,158 | 97.94 | 69,144 | Form 4 |
| 2025-01-27 | Chattopadhyay SanatExe V-P & Pres. MMD | Grant or award A | +28,136 | 97.94 | 78,758 | Form 4 |
| 2025-01-27 | Davis Robert MDirector, Chairman, CEO & President | Grant or award A | +95,275 | 97.94 | 443,602 | Form 4 |
| 2025-01-27 | DeLuca Richard R.EVP&Pres, Merck Animal Heallth | Grant or award A | +25,438 | 97.94 | 178,993 | Form 4 |
| 2025-01-27 | Downing Cristal NChief Comm. & Public Afrs Ofcr | Grant or award A | +9,446 | 97.94 | 9,446 | Form 4 |
| 2025-01-27 | Li Dean YExecutive VP & President, MRL | Grant or award A | +32,621 | 97.94 | 79,592 | Form 4 |
| 2025-01-27 | Litchfield CarolineEVP & CFO | Grant or award A | +23,432 | 97.94 | 74,340 | Form 4 |
| 2025-01-27 | Oosthuizen Johannes JacobusPresident, U.S. Market | Grant or award A | +8,664 | 97.94 | 32,607 | Form 4 |
| 2025-01-27 | Smart DaltonSVP Fin. - Global Controller | Grant or award A | +2,586 | 97.94 | 7,014 | Form 4 |
| 2025-01-27 | Williams David MichaelEVP,Chief Info&Digital Officer | Grant or award A | +10,246 | 97.94 | 30,123 | Form 4 |
| 2025-01-27 | Zachary JenniferEVP, General Counsel | Grant or award A | +25,423 | 97.94 | 55,286 | Form 4 |
How to read it
- Buy, sale
- Code P and S on the form: shares bought or sold in the market, at the market price. The other codes are mostly pay (a grant, an option exercised) or tax (shares the company withheld), and say little about what the insider thinks of the price.
- Plan
- A sale or purchase under a Rule 10b5-1 plan, set up in advance and running on its own schedule. Since April 2023 the form has a box for it. Much executive selling is planned and says more about diversifying than about the company.
- Holds after
- The shares the insider still held after the trade, in the form the trade was in (directly, or indirectly through a trust or a fund).
- Value
- Shares times the price the form reports, which is often an average over several fills on the day.
Read from the SEC's own quarterly data sets of Forms 3, 4 and 5, and from each day's filings since the last one. A correcting amendment replaces the lines it restates. Every row links to its filing. None of this is advice: insiders sell for many reasons, and buy for fewer.