MRKMerck & Co., Inc.
- Market cap
- $358.41B
- as of 2026-10-23
- Latest close
- $145.27
- as of 2026-10-23
- Sector
- Healthcare
- as of 2026-10-24
- Industry
- Drug Manufacturers - General
- as of 2026-10-24
Cluster
No cluster in the last 90 days under the default rule (14d · ≥2 insiders · all roles).
Form 4 historysince 2023-10-03
| Insider | Traded | Filed | Type | Shares | Price | Value | Owned after | 10b5-1 plan | Filing |
|---|---|---|---|---|---|---|---|---|---|
| Coe Mary Ellen | Sep 30 | Oct 1 | A · derivative | 206.46 | $145.31 | $30,000 | 32,419.87 | No | Form 4 |
| Seidman Christine E | Sep 30 | Oct 1 | A · derivative | 55.91 | $145.31 | $8,125 | 21,490.4 | No | Form 4 |
| Karsanbhai Surendralal Lanca | Sep 30 | Oct 1 | A · derivative | 111.83 | $145.31 | $16,250 | 5,667.01 | No | Form 4 |
| Guindo ChirfiEVP, Access, Policy & Comms | Aug 13 | Aug 13 | S | 10,000 | $135.00 | Sale −$1,350,000 | 36,613.13 | No | Form 4 |
| Zachary JenniferEVP, General Counsel | Aug 12 | Aug 13 | M | 41,494 | $117.89 | $4,891,728 | 112,391.25 | No | Form 4 |
| Zachary JenniferEVP, General Counsel | Aug 12 | Aug 13 | M | 13,433 | $84.71 | $1,137,909 | 125,824.25 | No | Form 4 |
| Zachary JenniferEVP, General Counsel | Aug 12 | Aug 13 | S | 80,315 | $133.46 | Sale −$10,718,840 | 45,509.25 | No | Form 4 |
| Zachary JenniferEVP, General Counsel | Aug 12 | Aug 13 | M · derivative | 41,494 | $117.89 | $4,891,728 | not reported | No | Form 4 |
| Zachary JenniferEVP, General Counsel | Aug 12 | Aug 13 | M · derivative | 13,433 | $84.71 | $1,137,909 | not reported | No | Form 4 |
| DeLuca Richard R.EVP&Pres, Merck Animal Heallth | Aug 12 | Aug 12 | S | 11,099 | $131.61 | Sale −$1,460,739 | 110,767.07 | No | Form 4 |
| DeLuca Richard R.EVP&Pres, Merck Animal Heallth | Aug 12 | Aug 12 | S | 600 | $132.04 | Sale −$79,224 | 110,167.07 | No | Form 4 |
| DeLuca Richard R.EVP&Pres, Merck Animal Heallth | Aug 11 | Aug 12 | S | 7,410 | $131.33 | Sale −$973,155 | 127,293.07 | No | Form 4 |
| DeLuca Richard R.EVP&Pres, Merck Animal Heallth | Aug 11 | Aug 12 | S | 5,427 | $132.35 | Sale −$718,263 | 121,866.07 | No | Form 4 |
| DeLuca Richard R.EVP&Pres, Merck Animal Heallth | Aug 10 | Aug 12 | S | 20,784 | $130.43 | Sale −$2,710,857 | 134,703.07 | No | Form 4 |
| DeLuca Richard R.EVP&Pres, Merck Animal Heallth | Aug 6 | Aug 10 | S | 805 | $131.02 | Sale −$105,471 | 160,732.07 | No | Form 4 |
| DeLuca Richard R.EVP&Pres, Merck Animal Heallth | Aug 6 | Aug 10 | S | 4,945 | $130.23 | Sale −$643,987 | 155,787.07 | No | Form 4 |
| DeLuca Richard R.EVP&Pres, Merck Animal Heallth | Aug 6 | Aug 10 | S | 300 | $131.02 | Sale −$39,306 | 155,487.07 | No | Form 4 |
| Guindo ChirfiEVP, Access, Policy & Comms | Aug 6 | Aug 7 | S | 15,000 | $131.00 | Sale −$1,965,000 | 46,613.13 | No | Form 4 |
| Williams David MichaelEVP,Chief Info&Digital Officer | Aug 5 | Aug 7 | M | 4,600 | $77.62 | $357,052 | 36,316.04 | No | Form 4 |
| Williams David MichaelEVP,Chief Info&Digital Officer | Aug 5 | Aug 7 | S | 4,600 | $128.77 | Sale −$592,342 | 31,716.04 | No | Form 4 |
| Williams David MichaelEVP,Chief Info&Digital Officer | Aug 5 | Aug 7 | M | 13,542 | $75.36 | $1,020,525 | 45,258.04 | No | Form 4 |
| Williams David MichaelEVP,Chief Info&Digital Officer | Aug 5 | Aug 7 | S | 13,542 | $128.77 | Sale −$1,743,803 | 31,716.04 | No | Form 4 |
| Williams David MichaelEVP,Chief Info&Digital Officer | Aug 5 | Aug 7 | M | 34,705 | $73.73 | $2,558,800 | 66,421.04 | No | Form 4 |
| Williams David MichaelEVP,Chief Info&Digital Officer | Aug 5 | Aug 7 | S | 34,705 | $128.77 | Sale −$4,468,963 | 31,716.04 | No | Form 4 |
| Williams David MichaelEVP,Chief Info&Digital Officer | Aug 5 | Aug 7 | M · derivative | 4,600 | $77.62 | $357,052 | not reported | No | Form 4 |
| Williams David MichaelEVP,Chief Info&Digital Officer | Aug 5 | Aug 7 | M · derivative | 13,542 | $75.36 | $1,020,525 | not reported | No | Form 4 |
| Williams David MichaelEVP,Chief Info&Digital Officer | Aug 5 | Aug 7 | M · derivative | 34,705 | $73.73 | $2,558,800 | not reported | No | Form 4 |
| Maraldo David R.EVP & Pres. MMD | Aug 5 | Aug 7 | M | 6,311 | $73.73 | $465,310 | 24,523.43 | No | Form 4 |
| Maraldo David R.EVP & Pres. MMD | Aug 5 | Aug 7 | S | 6,311 | $128.72 | Sale −$812,352 | 18,212.43 | No | Form 4 |
| Maraldo David R.EVP & Pres. MMD | Aug 5 | Aug 7 | M | 9,709 | $87.10 | $845,654 | 27,921.43 | No | Form 4 |
| Maraldo David R.EVP & Pres. MMD | Aug 5 | Aug 7 | S | 9,709 | $128.72 | Sale −$1,249,742 | 18,212.43 | No | Form 4 |
| Maraldo David R.EVP & Pres. MMD | Aug 5 | Aug 7 | M | 2,686 | $84.71 | $227,531 | 20,898.43 | No | Form 4 |
| Maraldo David R.EVP & Pres. MMD | Aug 5 | Aug 7 | S | 2,686 | $128.72 | Sale −$345,742 | 18,212.43 | No | Form 4 |
| Maraldo David R.EVP & Pres. MMD | Aug 5 | Aug 7 | M · derivative | 6,311 | $73.73 | $465,310 | 3,154 | No | Form 4 |
| Maraldo David R.EVP & Pres. MMD | Aug 5 | Aug 7 | M · derivative | 9,709 | $87.10 | $845,654 | not reported | No | Form 4 |
| Maraldo David R.EVP & Pres. MMD | Aug 5 | Aug 7 | M · derivative | 2,686 | $84.71 | $227,531 | 5,374 | No | Form 4 |
| Coe Mary Ellen | Jun 30 | Jul 1 | A · derivative | 233.46 | $128.50 | $30,000 | 31,999.1 | No | Form 4 |
| Karsanbhai Surendralal Lanca | Jun 30 | Jul 1 | A · derivative | 126.46 | $128.50 | $16,250 | 5,518.8 | No | Form 4 |
| Seidman Christine E | Jun 30 | Jul 1 | A · derivative | 63.23 | $128.50 | $8,125 | 21,291.27 | No | Form 4 |
| Baker Douglas M Jr | May 29 | Jun 2 | A · derivative | 1,853.1 | $118.72 | $220,000 | 11,518.21 | No | Form 4 |
| Craig Pamela J. | May 29 | Jun 2 | A · derivative | 1,853.1 | $118.72 | $220,000 | 34,944.93 | No | Form 4 |
| Glocer Thomas H | May 29 | Jun 2 | A · derivative | 1,853.1 | $118.72 | $220,000 | 110,911.76 | No | Form 4 |
| Lavizzo-Mourey Risa J | May 29 | Jun 2 | A · derivative | 1,853.1 | $118.72 | $220,000 | 17,749.35 | No | Form 4 |
| Mayo Stephen | May 29 | Jun 2 | A · derivative | 1,853.1 | $118.72 | $220,000 | 14,824.52 | No | Form 4 |
| Rothman Paul | May 29 | Jun 2 | A · derivative | 1,853.1 | $118.72 | $220,000 | 34,944.94 | No | Form 4 |
| Russo Patricia F | May 29 | Jun 2 | A · derivative | 1,853.1 | $118.72 | $220,000 | 62,390.75 | No | Form 4 |
| Seidman Christine E | May 29 | Jun 2 | A · derivative | 1,853.1 | $118.72 | $220,000 | 21,228.04 | No | Form 4 |
| Thulin Inge G | May 29 | Jun 2 | A · derivative | 1,853.1 | $118.72 | $220,000 | 27,469.71 | No | Form 4 |
| Coe Mary Ellen | May 29 | Jun 2 | A · derivative | 1,853.1 | $118.72 | $220,000 | 31,765.64 | No | Form 4 |
| Karsanbhai Surendralal Lanca | May 29 | Jun 2 | A · derivative | 1,853.1 | $118.72 | $220,000 | 5,392.34 | No | Form 4 |
| Warden Kathy J | May 29 | Jun 2 | A · derivative | 1,853.1 | $118.72 | $220,000 | 17,890.29 | No | Form 4 |
| Guindo ChirfiEVP, Access, Policy & Comms | May 5 | May 7 | A · derivative | 6,628 | $0.00 | $0 | 6,628 | No | Form 4 |
| Guindo ChirfiEVP, Access, Policy & Comms | May 5 | May 7 | A · derivative | 19,402 | $113.15 | $2,195,336 | 19,402 | No | Form 4 |
| Smart Dalton E. IIISVP Fin. - Global Controller | May 5 | May 7 | A · derivative | 2,298 | $0.00 | $0 | 2,298 | No | Form 4 |
| Smart Dalton E. IIISVP Fin. - Global Controller | May 5 | May 7 | A · derivative | 5,045 | $113.15 | $570,842 | 5,045 | No | Form 4 |
| Oosthuizen Johannes JacobusEVP, Oncology & Int?l | May 5 | May 7 | A · derivative | 10,605 | $0.00 | $0 | 10,605 | No | Form 4 |
| Oosthuizen Johannes JacobusEVP, Oncology & Int?l | May 5 | May 7 | A · derivative | 31,044 | $113.15 | $3,512,629 | 31,044 | No | Form 4 |
| Maraldo David R.EVP & Pres. MMD | May 5 | May 7 | A · derivative | 7,424 | $0.00 | $0 | 7,424 | No | Form 4 |
| Maraldo David R.EVP & Pres. MMD | May 5 | May 7 | A · derivative | 21,731 | $113.15 | $2,458,863 | 21,731 | No | Form 4 |
| Foard BrianEVP, Specialty, Pharma, & ID | May 5 | May 7 | A · derivative | 10,605 | $0.00 | $0 | 10,605 | No | Form 4 |
| Foard BrianEVP, Specialty, Pharma, & ID | May 5 | May 7 | A · derivative | 35,351 | $0.00 | $0 | 35,351 | No | Form 4 |
| Foard BrianEVP, Specialty, Pharma, & ID | May 5 | May 7 | A · derivative | 31,044 | $113.15 | $3,512,629 | 31,044 | No | Form 4 |
| Davis Robert MChairman, CEO & President | May 5 | May 7 | A · derivative | 47,724 | $0.00 | $0 | 47,724 | No | Form 4 |
| Davis Robert MChairman, CEO & President | May 5 | May 7 | A · derivative | 139,697 | $113.15 | $15,806,716 | 139,697 | No | Form 4 |
| DeLuca Richard R.EVP&Pres, Merck Animal Heallth | May 5 | May 7 | A · derivative | 11,931 | $0.00 | $0 | 11,931 | No | Form 4 |
| DeLuca Richard R.EVP&Pres, Merck Animal Heallth | May 5 | May 7 | A · derivative | 34,924 | $113.15 | $3,951,651 | 34,924 | No | Form 4 |
| Larson Betty DEVP, Chief HR Officer | May 5 | May 7 | A · derivative | 7,954 | $0.00 | $0 | 7,954 | No | Form 4 |
| Larson Betty DEVP, Chief HR Officer | May 5 | May 7 | A · derivative | 23,283 | $113.15 | $2,634,471 | 23,283 | No | Form 4 |
| Li Dean YExecutive VP & President, MRL | May 5 | May 7 | A · derivative | 19,885 | $0.00 | $0 | 19,885 | No | Form 4 |
| Li Dean YExecutive VP & President, MRL | May 5 | May 7 | A · derivative | 58,207 | $113.15 | $6,586,122 | 58,207 | No | Form 4 |
| Litchfield CarolineEVP & CFO | May 5 | May 7 | A · derivative | 15,908 | $0.00 | $0 | 15,908 | No | Form 4 |
| Litchfield CarolineEVP & CFO | May 5 | May 7 | A · derivative | 46,566 | $113.15 | $5,268,943 | 46,566 | No | Form 4 |
| Williams David MichaelEVP,Chief Info&Digital Officer | May 5 | May 7 | A · derivative | 4,640 | $0.00 | $0 | 4,640 | No | Form 4 |
| Williams David MichaelEVP,Chief Info&Digital Officer | May 5 | May 7 | A · derivative | 13,582 | $113.15 | $1,536,803 | 13,582 | No | Form 4 |
| Zachary JenniferEVP, General Counsel | May 5 | May 7 | A · derivative | 12,064 | $0.00 | $0 | 12,064 | No | Form 4 |
| Zachary JenniferEVP, General Counsel | May 5 | May 7 | A · derivative | 35,312 | $113.15 | $3,995,553 | 35,312 | No | Form 4 |
| Maraldo David R.EVP & Pres. MMD | May 2 | May 5 | M | 552 | $112.16 | $61,912 | 18,371.43 | No | Form 4 |
| Maraldo David R.EVP & Pres. MMD | May 2 | May 5 | F | 159 | $112.16 | $17,833 | 18,212.43 | No | Form 4 |
| Maraldo David R.EVP & Pres. MMD | May 2 | May 5 | M · derivative | 552 | $0.00 | $0 | not reported | No | Form 4 |
| Smart Dalton E. IIISVP Fin. - Global Controller | May 2 | May 5 | M | 383 | $112.16 | $42,957 | 9,520.32 | No | Form 4 |
| Smart Dalton E. IIISVP Fin. - Global Controller | May 2 | May 5 | F | 132 | $112.16 | $14,805 | 9,388.32 | No | Form 4 |
| Smart Dalton E. IIISVP Fin. - Global Controller | May 2 | May 5 | M · derivative | 383 | $0.00 | $0 | not reported | No | Form 4 |
| Larson Betty DEVP, Chief HR Officer | Apr 30 | May 1 | M | 11,350 | $110.95 | $1,259,283 | 18,917 | No | Form 4 |
| Larson Betty DEVP, Chief HR Officer | Apr 30 | May 1 | F | 5,143 | $110.95 | $570,616 | 13,774 | No | Form 4 |
| Larson Betty DEVP, Chief HR Officer | Apr 30 | May 1 | M · derivative | 11,350 | $0.00 | $0 | 11,350 | No | Form 4 |
| Smart Dalton E. IIISVP Fin. - Global Controller | Apr 30 | May 1 | M | 464 | $110.95 | $51,481 | 9,296.32 | No | Form 4 |
| Smart Dalton E. IIISVP Fin. - Global Controller | Apr 30 | May 1 | F | 159 | $110.95 | $17,641 | 9,137.32 | No | Form 4 |
| Smart Dalton E. IIISVP Fin. - Global Controller | Apr 30 | May 1 | M · derivative | 464 | $0.00 | $0 | 465 | No | Form 4 |
| Oosthuizen Johannes JacobusEVP, Oncology & Int?l | Apr 29 | May 1 | M | 1,377 | $110.03 | $151,511 | 22,574.39 | No | Form 4 |
| Oosthuizen Johannes JacobusEVP, Oncology & Int?l | Apr 29 | May 1 | F | 679 | $110.03 | $74,710 | 21,895.39 | No | Form 4 |
| Oosthuizen Johannes JacobusEVP, Oncology & Int?l | Apr 29 | May 1 | M · derivative | 1,377 | $0.00 | $0 | 2,755 | No | Form 4 |
| Davis Robert MChairman, CEO & President | Apr 29 | May 1 | M | 13,300 | $110.03 | $1,463,399 | 456,901.76 | No | Form 4 |
| Davis Robert MChairman, CEO & President | Apr 29 | May 1 | F | 6,551 | $110.03 | $720,807 | 450,350.76 | No | Form 4 |
| Davis Robert MChairman, CEO & President | Apr 29 | May 1 | M · derivative | 13,300 | $0.00 | $0 | 26,601 | No | Form 4 |
| Litchfield CarolineEVP & CFO | Apr 29 | May 1 | M | 3,935 | $110.03 | $432,968 | 94,238.66 | No | Form 4 |
| Litchfield CarolineEVP & CFO | Apr 29 | May 1 | F | 1,938 | $110.03 | $213,238 | 92,300.66 | No | Form 4 |
| Litchfield CarolineEVP & CFO | Apr 29 | May 1 | M · derivative | 3,935 | $0.00 | $0 | 7,870 | No | Form 4 |
| Larson Betty DEVP, Chief HR Officer | Apr 29 | May 1 | M | 2,085 | $110.03 | $229,413 | 8,282 | No | Form 4 |
| Larson Betty DEVP, Chief HR Officer | Apr 29 | May 1 | F | 715 | $110.03 | $78,671 | 7,567 | No | Form 4 |
| Larson Betty DEVP, Chief HR Officer | Apr 29 | May 1 | M · derivative | 2,085 | $0.00 | $0 | 4,172 | No | Form 4 |
| Zachary JenniferEVP, General Counsel | Apr 29 | May 1 | M | 2,951 | $110.03 | $324,699 | 72,351.25 | No | Form 4 |
| Zachary JenniferEVP, General Counsel | Apr 29 | May 1 | F | 1,454 | $110.03 | $159,984 | 70,897.25 | No | Form 4 |
| Zachary JenniferEVP, General Counsel | Apr 29 | May 1 | M · derivative | 2,951 | $0.00 | $0 | 5,903 | No | Form 4 |
| Li Dean YExecutive VP & President, MRL | Apr 29 | May 1 | M | 4,722 | $110.03 | $519,562 | 96,757.05 | No | Form 4 |
| Li Dean YExecutive VP & President, MRL | Apr 29 | May 1 | F | 2,326 | $110.03 | $255,930 | 94,431.05 | No | Form 4 |
| Li Dean YExecutive VP & President, MRL | Apr 29 | May 1 | M · derivative | 4,722 | $0.00 | $0 | 9,444 | No | Form 4 |
| Smart Dalton E. IIISVP Fin. - Global Controller | Apr 29 | May 1 | M | 944 | $110.03 | $103,868 | 9,156.32 | No | Form 4 |
| Smart Dalton E. IIISVP Fin. - Global Controller | Apr 29 | May 1 | F | 324 | $110.03 | $35,650 | 8,832.32 | No | Form 4 |
| Smart Dalton E. IIISVP Fin. - Global Controller | Apr 29 | May 1 | M · derivative | 944 | $0.00 | $0 | 1,889 | No | Form 4 |
| Williams David MichaelEVP,Chief Info&Digital Officer | Apr 29 | May 1 | M | 1,377 | $110.03 | $151,511 | 32,395.04 | No | Form 4 |
| Williams David MichaelEVP,Chief Info&Digital Officer | Apr 29 | May 1 | F | 679 | $110.03 | $74,710 | 31,716.04 | No | Form 4 |
| Williams David MichaelEVP,Chief Info&Digital Officer | Apr 29 | May 1 | M · derivative | 1,377 | $0.00 | $0 | 2,755 | No | Form 4 |
| DeLuca Richard R.EVP&Pres, Merck Animal Heallth | Apr 29 | May 1 | M | 2,518 | $110.03 | $277,056 | 162,778.07 | No | Form 4 |
| DeLuca Richard R.EVP&Pres, Merck Animal Heallth | Apr 29 | May 1 | F | 1,241 | $110.03 | $136,547 | 161,537.07 | No | Form 4 |
| DeLuca Richard R.EVP&Pres, Merck Animal Heallth | Apr 29 | May 1 | M · derivative | 2,518 | $0.00 | $0 | 5,037 | No | Form 4 |
| Chattopadhyay SanatExe V-P & Pres. MMD | Apr 29 | May 1 | M | 2,597 | $110.03 | $285,748 | 16,477 | No | Form 4 |
| Chattopadhyay SanatExe V-P & Pres. MMD | Apr 29 | May 1 | F | 1,130 | $110.03 | $124,334 | 15,347 | No | Form 4 |
| Chattopadhyay SanatExe V-P & Pres. MMD | Apr 29 | May 1 | M · derivative | 2,597 | $0.00 | $0 | 5,194 | No | Form 4 |
| Guindo ChirfiEVP, Access, Policy & Comms | Apr 29 | May 1 | M | 1,967 | $110.03 | $216,429 | 62,582.13 | No | Form 4 |
| Guindo ChirfiEVP, Access, Policy & Comms | Apr 29 | May 1 | F | 969 | $110.03 | $106,619 | 61,613.13 | No | Form 4 |
| Guindo ChirfiEVP, Access, Policy & Comms | Apr 29 | May 1 | M · derivative | 1,967 | $0.00 | $0 | 3,935 | No | Form 4 |
| Coe Mary Ellen | Mar 31 | Apr 1 | A · derivative | 249.4 | $120.29 | $30,000 | 29,702.65 | No | Form 4 |
| Glocer Thomas H | Mar 31 | Apr 1 | A · derivative | 405.27 | $120.29 | $48,750 | 108,293.49 | No | Form 4 |
| Seidman Christine E | Mar 31 | Apr 1 | A · derivative | 67.55 | $120.29 | $8,126 | 19,238.33 | No | Form 4 |
| Guindo ChirfiChief Marketing Officer | Feb 12 | Feb 12 | S | 10,000 | $121.46 | Sale −$1,214,600 | 60,615.13 | No | Form 4 |
| Li Dean YExecutive VP & President, MRL | Feb 10 | Feb 10 | S | 10,235 | $117.52 | Sale −$1,202,817 | 92,035.05 | No | Form 4 |
| Zachary JenniferEVP, General Counsel | Feb 9 | Feb 9 | M | 25,946 | $119.15 | $3,091,466 | 94,861.67 | No | Form 4 |
| Zachary JenniferEVP, General Counsel | Feb 9 | Feb 9 | S | 25,946 | $119.15 | Sale −$3,091,466 | 68,915.67 | No | Form 4 |
| Zachary JenniferEVP, General Counsel | Feb 9 | Feb 9 | M | 56,792 | $119.15 | $6,766,767 | 125,707.67 | No | Form 4 |
| Zachary JenniferEVP, General Counsel | Feb 9 | Feb 9 | S | 56,792 | $119.15 | Sale −$6,766,767 | 68,915.67 | No | Form 4 |
| Zachary JenniferEVP, General Counsel | Feb 9 | Feb 9 | M | 38,835 | $119.15 | $4,627,190 | 107,750.67 | No | Form 4 |
| Zachary JenniferEVP, General Counsel | Feb 9 | Feb 9 | S | 38,835 | $119.15 | Sale −$4,627,190 | 68,915.67 | No | Form 4 |
| Zachary JenniferEVP, General Counsel | Feb 9 | Feb 9 | M · derivative | 25,946 | $75.36 | $1,955,291 | not reported | No | Form 4 |
| Zachary JenniferEVP, General Counsel | Feb 9 | Feb 9 | M · derivative | 56,792 | $73.73 | $4,187,274 | not reported | No | Form 4 |
| Zachary JenniferEVP, General Counsel | Feb 9 | Feb 9 | M · derivative | 38,835 | $87.10 | $3,382,529 | not reported | No | Form 4 |
| Guindo ChirfiChief Marketing Officer | Feb 9 | Feb 9 | S | 10,000 | $118.41 | Sale −$1,184,100 | 70,615.13 | No | Form 4 |
| DeLuca Richard R.EVP&Pres, Merck Animal Heallth | Feb 6 | Feb 6 | S | 37,685 | $120.92 | Sale −$4,556,870 | 160,173.83 | No | Form 4 |
| Oosthuizen Johannes JacobusPresident, U.S. Market | Feb 6 | Feb 6 | S | 15,000 | $121.87 | Sale −$1,828,050 | 21,197.39 | No | Form 4 |
| Williams David MichaelEVP,Chief Info&Digital Officer | Feb 6 | Feb 6 | M | 5,000 | $77.62 | $388,100 | 35,837.74 | No | Form 4 |
| Williams David MichaelEVP,Chief Info&Digital Officer | Feb 6 | Feb 6 | S | 5,000 | $121.91 | Sale −$609,550 | 30,837.74 | No | Form 4 |
| Williams David MichaelEVP,Chief Info&Digital Officer | Feb 6 | Feb 6 | M · derivative | 5,000 | $77.62 | $388,100 | 4,600 | No | Form 4 |
| Guindo ChirfiChief Marketing Officer | Feb 5 | Feb 6 | S | 20,000 | $121.88 | Sale −$2,437,600 | 80,615.13 | No | Form 4 |
| Davis Robert MChairman, CEO & President | Feb 4 | Feb 6 | S | 14,972 | $117.38 | Sale −$1,757,413 | 476,063.76 | No | Form 4 |
| Davis Robert MChairman, CEO & President | Feb 4 | Feb 6 | S | 32,462 | $118.35 | Sale −$3,841,878 | 443,601.76 | No | Form 4 |
| Li Dean YExecutive VP & President, MRL | Feb 4 | Feb 6 | M | 15,087 | $56.04 | $845,475 | 117,357.05 | No | Form 4 |
| Li Dean YExecutive VP & President, MRL | Feb 4 | Feb 6 | S | 15,087 | $118.77 | Sale −$1,791,883 | 102,270.05 | No | Form 4 |
| Li Dean YExecutive VP & President, MRL | Feb 4 | Feb 6 | M · derivative | 15,087 | $56.04 | $845,475 | not reported | No | Form 4 |
| Litchfield CarolineEVP & CFO | Feb 4 | Feb 6 | M | 41,997 | $53.06 | $2,228,361 | 132,189.19 | No | Form 4 |
| Litchfield CarolineEVP & CFO | Feb 4 | Feb 6 | S | 41,997 | $119.61 | Sale −$5,023,261 | 90,192.19 | No | Form 4 |
| Litchfield CarolineEVP & CFO | Feb 4 | Feb 6 | M · derivative | 41,997 | $53.06 | $2,228,361 | not reported | No | Form 4 |
| Smart Dalton E. IIISVP Fin. - Global Controller | Feb 4 | Feb 6 | M | 4,000 | $62.07 | $248,280 | 14,604.82 | No | Form 4 |
| Smart Dalton E. IIISVP Fin. - Global Controller | Feb 4 | Feb 6 | S | 4,000 | $119.68 | Sale −$478,720 | 10,604.82 | No | Form 4 |
| Smart Dalton E. IIISVP Fin. - Global Controller | Feb 4 | Feb 6 | S | 2,400 | $119.68 | Sale −$287,232 | 8,204.82 | No | Form 4 |
| Smart Dalton E. IIISVP Fin. - Global Controller | Feb 4 | Feb 6 | M · derivative | 4,000 | $62.07 | $248,280 | 8,130 | No | Form 4 |
| Chattopadhyay SanatExe V-P & Pres. MMD | Jan 26 | Jan 28 | A | 13,880 | $107.40 | $1,490,712 | 13,880 | No | Form 4 |
| Davis Robert MChairman, CEO & President | Jan 26 | Jan 28 | A | 47,434 | $107.40 | $5,094,412 | 491,035.76 | No | Form 4 |
| DeLuca Richard R.EVP&Pres, Merck Animal Heallth | Jan 26 | Jan 28 | A | 12,264 | $107.40 | $1,317,154 | 197,858.83 | No | Form 4 |
| Guindo ChirfiChief Marketing Officer | Jan 26 | Jan 28 | A | 9,865 | $107.40 | $1,059,501 | 100,615.13 | No | Form 4 |
| Li Dean YExecutive VP & President, MRL | Jan 26 | Jan 28 | A | 20,469 | $107.40 | $2,198,371 | 102,270.05 | No | Form 4 |
| Litchfield CarolineEVP & CFO | Jan 26 | Jan 28 | A | 15,852 | $107.40 | $1,702,505 | 90,192.19 | No | Form 4 |
| Oosthuizen Johannes JacobusPresident, U.S. Market | Jan 26 | Jan 28 | A | 5,026 | $107.40 | $539,792 | 36,197.39 | No | Form 4 |
| Romanelli JosephPresident, Human Health Int?l | Jan 26 | Jan 28 | A | 5,703 | $107.40 | $612,502 | 28,739.34 | No | Form 4 |
| Smart Dalton E. IIISVP Fin. - Global Controller | Jan 26 | Jan 28 | A | 1,066 | $107.40 | $114,488 | 10,604.82 | No | Form 4 |
| Williams David MichaelEVP,Chief Info&Digital Officer | Jan 26 | Jan 28 | A | 6,112 | $107.40 | $656,429 | 30,837.74 | No | Form 4 |
| Zachary JenniferEVP, General Counsel | Jan 26 | Jan 28 | A | 11,583 | $107.40 | $1,244,014 | 68,915.67 | No | Form 4 |
| Coe Mary Ellen | Dec 31, 2025 | Jan 5 | A · derivative | 285.01 | $105.26 | $30,000 | 29,231.57 | No | Form 4 |
| Glocer Thomas H | Dec 31, 2025 | Jan 5 | A · derivative | 463.14 | $105.26 | $48,750 | 107,075.67 | No | Form 4 |
| Seidman Christine E | Dec 31, 2025 | Jan 5 | A · derivative | 77.19 | $105.26 | $8,125 | 19,025.67 | No | Form 4 |
| Downing Cristal NChief Comm. & Public Afrs Ofcr | Nov 10, 2025 | Nov 12, 2025 | S | 7,085 | $87.00 | Sale −$616,395 | not reported | No | Form 4 |
| Williams David MichaelEVP,Chief Info&Digital Officer | Nov 3, 2025 | Nov 4, 2025 | S | 8,614 | $83.59 | Sale −$720,044 | 24,578.03 | No | Form 4 |
| Coe Mary Ellen | Sep 30, 2025 | Oct 2, 2025 | A · derivative | 357.44 | $83.93 | $30,000 | 28,684.66 | No | Form 4 |
| Glocer Thomas H | Sep 30, 2025 | Oct 2, 2025 | A · derivative | 580.84 | $83.93 | $48,750 | 105,645.9 | No | Form 4 |
| Seidman Christine E | Sep 30, 2025 | Oct 2, 2025 | A · derivative | 96.81 | $83.93 | $8,125 | 18,775.78 | No | Form 4 |
| Guindo ChirfiChief Marketing Officer | Aug 4, 2025 | Aug 5, 2025 | M | 36,903 | $79.29 | $2,926,039 | 107,408.97 | No | Form 4 |
| Guindo ChirfiChief Marketing Officer | Aug 4, 2025 | Aug 5, 2025 | F | 18,175 | $79.29 | $1,441,096 | 89,233.97 | No | Form 4 |
| Guindo ChirfiChief Marketing Officer | Aug 4, 2025 | Aug 5, 2025 | M · derivative | 36,903 | $0.00 | $0 | not reported | No | Form 4 |
| Williams David MichaelEVP,Chief Info&Digital Officer | Aug 4, 2025 | Aug 5, 2025 | M | 17,119 | $79.29 | $1,357,366 | 41,445.47 | No | Form 4 |
| Williams David MichaelEVP,Chief Info&Digital Officer | Aug 4, 2025 | Aug 5, 2025 | F | 8,432 | $79.29 | $668,573 | 33,013.47 | No | Form 4 |
| Williams David MichaelEVP,Chief Info&Digital Officer | Aug 4, 2025 | Aug 5, 2025 | M · derivative | 17,119 | $0.00 | $0 | not reported | No | Form 4 |
| Coe Mary Ellen | Jun 30, 2025 | Jul 2, 2025 | A · derivative | 378.98 | $79.16 | $30,000 | 28,051.75 | No | Form 4 |
| Glocer Thomas H | Jun 30, 2025 | Jul 2, 2025 | A · derivative | 615.84 | $79.16 | $48,750 | 104,040.62 | No | Form 4 |
| Seidman Christine E | Jun 30, 2025 | Jul 2, 2025 | A · derivative | 102.64 | $79.16 | $8,125 | 18,495.88 | No | Form 4 |
| Baker Douglas M Jr | May 30, 2025 | Jun 3, 2025 | A · derivative | 2,863.09 | $76.84 | $220,000 | 9,343.53 | No | Form 4 |
| Coe Mary Ellen | May 30, 2025 | Jun 3, 2025 | A · derivative | 2,863.09 | $76.84 | $220,000 | 27,672.77 | No | Form 4 |
| Craig Pamela J. | May 30, 2025 | Jun 3, 2025 | A · derivative | 2,863.09 | $76.84 | $220,000 | 31,990.79 | No | Form 4 |
| Glocer Thomas H | May 30, 2025 | Jun 3, 2025 | A · derivative | 2,863.09 | $76.84 | $220,000 | 103,424.78 | No | Form 4 |
| Karsanbhai Surendralal Lanca | May 30, 2025 | Jun 3, 2025 | A · derivative | 2,863.09 | $76.84 | $220,000 | 3,421.48 | No | Form 4 |
| Lavizzo-Mourey Risa J | May 30, 2025 | Jun 3, 2025 | A · derivative | 2,863.09 | $76.84 | $220,000 | 15,367.35 | No | Form 4 |
| Mayo Stephen | May 30, 2025 | Jun 3, 2025 | A · derivative | 2,863.09 | $76.84 | $220,000 | 12,539.83 | No | Form 4 |
| Rothman Paul | May 30, 2025 | Jun 3, 2025 | A · derivative | 2,863.09 | $76.84 | $220,000 | 31,990.8 | No | Form 4 |
| Russo Patricia F | May 30, 2025 | Jun 3, 2025 | A · derivative | 2,863.09 | $76.84 | $220,000 | 58,523.43 | No | Form 4 |
| Seidman Christine E | May 30, 2025 | Jun 3, 2025 | A · derivative | 2,863.09 | $76.84 | $220,000 | 18,393.24 | No | Form 4 |
| Thulin Inge G | May 30, 2025 | Jun 3, 2025 | A · derivative | 2,863.09 | $76.84 | $220,000 | 24,764.29 | No | Form 4 |
| Warden Kathy J | May 30, 2025 | Jun 3, 2025 | A · derivative | 2,863.09 | $76.84 | $220,000 | 15,503.6 | No | Form 4 |
| Smart Dalton E. IIISVP Fin. - Global Controller | May 3, 2025 | May 5, 2025 | M | 518 | $83.18 | $43,087 | 8,850.8 | No | Form 4 |
| Smart Dalton E. IIISVP Fin. - Global Controller | May 3, 2025 | May 5, 2025 | F | 256 | $83.18 | $21,294 | 8,594.8 | No | Form 4 |
| Smart Dalton E. IIISVP Fin. - Global Controller | May 3, 2025 | May 5, 2025 | M | 1,532 | $83.18 | $127,432 | 10,126.8 | No | Form 4 |
| Smart Dalton E. IIISVP Fin. - Global Controller | May 3, 2025 | May 5, 2025 | F | 588 | $83.18 | $48,910 | 9,538.8 | No | Form 4 |
| Smart Dalton E. IIISVP Fin. - Global Controller | May 3, 2025 | May 5, 2025 | M · derivative | 518 | $0.00 | $0 | not reported | No | Form 4 |
| Smart Dalton E. IIISVP Fin. - Global Controller | May 3, 2025 | May 5, 2025 | M · derivative | 1,532 | $0.00 | $0 | not reported | No | Form 4 |
| Romanelli JosephPresident, Human Health Int?l | May 2, 2025 | May 2, 2025 | M | 2,262 | $83.26 | $188,334 | 24,060.55 | No | Form 4 |
| Romanelli JosephPresident, Human Health Int?l | May 2, 2025 | May 2, 2025 | F | 1,115 | $83.26 | $92,835 | 22,945.55 | No | Form 4 |
| Romanelli JosephPresident, Human Health Int?l | May 2, 2025 | May 2, 2025 | M · derivative | 2,262 | $0.00 | $0 | 2,262 | No | Form 4 |
| Smart Dalton E. IIISVP Fin. - Global Controller | May 2, 2025 | May 2, 2025 | M | 381 | $83.26 | $31,722 | 8,463.8 | No | Form 4 |
| Smart Dalton E. IIISVP Fin. - Global Controller | May 2, 2025 | May 2, 2025 | F | 131 | $83.26 | $10,907 | 8,332.8 | No | Form 4 |
| Smart Dalton E. IIISVP Fin. - Global Controller | May 2, 2025 | May 2, 2025 | M · derivative | 381 | $0.00 | $0 | 383 | No | Form 4 |
| Larson Betty DEVP, Chief HR Officer | Apr 30, 2025 | May 2, 2025 | M | 11,350 | $84.71 | $961,459 | 11,350 | No | Form 4 |
| Larson Betty DEVP, Chief HR Officer | Apr 30, 2025 | May 2, 2025 | F | 5,153 | $84.71 | $436,511 | 6,197 | No | Form 4 |
| Larson Betty DEVP, Chief HR Officer | Apr 30, 2025 | May 2, 2025 | M · derivative | 11,350 | $0.00 | $0 | 22,700 | No | Form 4 |
| Romanelli JosephPresident, Human Health Int?l | Apr 30, 2025 | May 2, 2025 | M | 2,063 | $84.71 | $174,757 | 22,815.55 | No | Form 4 |
| Romanelli JosephPresident, Human Health Int?l | Apr 30, 2025 | May 2, 2025 | F | 1,017 | $84.71 | $86,150 | 21,798.55 | No | Form 4 |
| Romanelli JosephPresident, Human Health Int?l | Apr 30, 2025 | May 2, 2025 | M · derivative | 2,063 | $0.00 | $0 | 4,128 | No | Form 4 |
| Smart Dalton E. IIISVP Fin. - Global Controller | Apr 30, 2025 | May 2, 2025 | M | 464 | $84.71 | $39,305 | 8,241.8 | No | Form 4 |
| Smart Dalton E. IIISVP Fin. - Global Controller | Apr 30, 2025 | May 2, 2025 | F | 159 | $84.71 | $13,469 | 8,082.8 | No | Form 4 |
| Smart Dalton E. IIISVP Fin. - Global Controller | Apr 30, 2025 | May 2, 2025 | M · derivative | 464 | $0.00 | $0 | 929 | No | Form 4 |
| Guindo ChirfiChief Marketing Officer | Apr 29, 2025 | May 1, 2025 | A · derivative | 5,902 | $0.00 | $0 | 5,902 | No | Form 4 |
| Guindo ChirfiChief Marketing Officer | Apr 29, 2025 | May 1, 2025 | A · derivative | 26,867 | $84.71 | $2,275,904 | 26,867 | No | Form 4 |
| Downing Cristal NChief Comm. & Public Afrs Ofcr | Apr 29, 2025 | May 1, 2025 | A · derivative | 3,069 | $0.00 | $0 | 3,069 | No | Form 4 |
| Downing Cristal NChief Comm. & Public Afrs Ofcr | Apr 29, 2025 | May 1, 2025 | A · derivative | 13,971 | $84.71 | $1,183,483 | 13,971 | No | Form 4 |
| Zachary JenniferEVP, General Counsel | Apr 29, 2025 | May 1, 2025 | A · derivative | 8,854 | $0.00 | $0 | 8,854 | No | Form 4 |
| Zachary JenniferEVP, General Counsel | Apr 29, 2025 | May 1, 2025 | A · derivative | 40,301 | $84.71 | $3,413,898 | 40,301 | No | Form 4 |
| Li Dean YExecutive VP & President, MRL | Apr 29, 2025 | May 1, 2025 | A · derivative | 14,166 | $0.00 | $0 | 14,166 | No | Form 4 |
| Li Dean YExecutive VP & President, MRL | Apr 29, 2025 | May 1, 2025 | A · derivative | 64,481 | $84.71 | $5,462,186 | 64,481 | No | Form 4 |
| Oosthuizen Johannes JacobusPresident, U.S. Market | Apr 29, 2025 | May 1, 2025 | A · derivative | 4,132 | $0.00 | $0 | 4,132 | No | Form 4 |
| Oosthuizen Johannes JacobusPresident, U.S. Market | Apr 29, 2025 | May 1, 2025 | A · derivative | 18,807 | $84.71 | $1,593,141 | 18,807 | No | Form 4 |
| Davis Robert MChairman, CEO & President | Apr 29, 2025 | May 1, 2025 | A · derivative | 39,901 | $0.00 | $0 | 39,901 | No | Form 4 |
| Davis Robert MChairman, CEO & President | Apr 29, 2025 | May 1, 2025 | A · derivative | 181,623 | $84.71 | $15,385,284 | 181,623 | No | Form 4 |
| DeLuca Richard R.EVP&Pres, Merck Animal Heallth | Apr 29, 2025 | May 1, 2025 | A · derivative | 7,555 | $0.00 | $0 | 7,555 | No | Form 4 |
| DeLuca Richard R.EVP&Pres, Merck Animal Heallth | Apr 29, 2025 | May 1, 2025 | A · derivative | 34,390 | $84.71 | $2,913,177 | 34,390 | No | Form 4 |
| Chattopadhyay SanatExe V-P & Pres. MMD | Apr 29, 2025 | May 1, 2025 | A · derivative | 7,791 | $0.00 | $0 | 7,791 | No | Form 4 |
| Chattopadhyay SanatExe V-P & Pres. MMD | Apr 29, 2025 | May 1, 2025 | A · derivative | 35,465 | $84.71 | $3,004,240 | 35,465 | No | Form 4 |
| Williams David MichaelEVP,Chief Info&Digital Officer | Apr 29, 2025 | May 1, 2025 | A · derivative | 4,132 | $0.00 | $0 | 4,132 | No | Form 4 |
| Williams David MichaelEVP,Chief Info&Digital Officer | Apr 29, 2025 | May 1, 2025 | A · derivative | 18,807 | $84.71 | $1,593,141 | 18,807 | No | Form 4 |
| Litchfield CarolineEVP & CFO | Apr 29, 2025 | May 1, 2025 | A · derivative | 11,805 | $0.00 | $0 | 11,805 | No | Form 4 |
| Litchfield CarolineEVP & CFO | Apr 29, 2025 | May 1, 2025 | A · derivative | 53,735 | $84.71 | $4,551,892 | 53,735 | No | Form 4 |
| Smart Dalton E. IIISVP Fin. - Global Controller | Apr 29, 2025 | May 1, 2025 | A · derivative | 2,833 | $0.00 | $0 | 2,833 | No | Form 4 |
| Smart Dalton E. IIISVP Fin. - Global Controller | Apr 29, 2025 | May 1, 2025 | A · derivative | 6,448 | $84.71 | $546,210 | 6,448 | No | Form 4 |
| Smart Dalton E. IIISVP Fin. - Global Controller | Apr 25, 2025 | Apr 29, 2025 | M | 5,000 | $58.08 | $290,400 | 12,039.8 | No | Form 4 |
| Smart Dalton E. IIISVP Fin. - Global Controller | Apr 25, 2025 | Apr 29, 2025 | S | 4,262 | $82.76 | Sale −$352,723 | 7,777.8 | No | Form 4 |
| Smart Dalton E. IIISVP Fin. - Global Controller | Apr 25, 2025 | Apr 29, 2025 | M · derivative | 5,000 | $58.08 | $290,400 | not reported | No | Form 4 |
| Coe Mary Ellen | Mar 31, 2025 | Apr 2, 2025 | A · derivative | 334.22 | $89.76 | $30,000 | 24,567.88 | No | Form 4 |
| Glocer Thomas H | Mar 31, 2025 | Apr 2, 2025 | A · derivative | 543.12 | $89.76 | $48,750 | 99,578.64 | No | Form 4 |
| Seidman Christine E | Mar 31, 2025 | Apr 2, 2025 | A · derivative | 90.52 | $89.76 | $8,125 | 15,377.61 | No | Form 4 |
| Oosthuizen Johannes JacobusPresident, U.S. Market | Feb 19, 2025 | Feb 20, 2025 | S | 8,500 | $84.09 | Sale −$714,765 | 30,705.47 | No | Form 4 |
| Williams David MichaelEVP,Chief Info&Digital Officer | Feb 13, 2025 | Feb 13, 2025 | S | 6,000 | $85.34 | Sale −$512,040 | 24,123.32 | No | Form 4 |
| Oosthuizen Johannes JacobusPresident, U.S. Market | Feb 8, 2025 | Feb 11, 2025 | M | 13,002 | $87.28 | $1,134,815 | 45,609.47 | No | Form 4 |
| Oosthuizen Johannes JacobusPresident, U.S. Market | Feb 8, 2025 | Feb 11, 2025 | F | 6,404 | $87.28 | $558,941 | 39,205.47 | No | Form 4 |
| Oosthuizen Johannes JacobusPresident, U.S. Market | Feb 8, 2025 | Feb 11, 2025 | M · derivative | 13,002 | $0.00 | $0 | not reported | No | Form 4 |
| Downing Cristal NChief Comm. & Public Afrs Ofcr | Feb 6, 2025 | Feb 7, 2025 | S | 2,361 | $88.76 | Sale −$209,562 | 7,085 | No | Form 4 |
| Thulin Inge G | Feb 6, 2025 | Feb 7, 2025 | P | 2,832.86 | $88.25 | Purchase +$250,000 | 2,932.86 | No | Form 4 |
| Baker Douglas M Jr | Feb 5, 2025 | Feb 7, 2025 | P | 15,000 | $88.50 | Purchase +$1,327,500 | 16,000 | No | Form 4 |
| Guindo ChirfiChief Marketing Officer | Jan 27, 2025 | Jan 29, 2025 | A | 28,158 | $97.94 | $2,757,795 | 69,143.92 | No | Form 4 |
| Chattopadhyay SanatExe V-P & Pres. MMD | Jan 27, 2025 | Jan 29, 2025 | A | 28,136 | $97.94 | $2,755,640 | 78,758 | No | Form 4 |
| Davis Robert MChairman, CEO & President | Jan 27, 2025 | Jan 29, 2025 | A | 95,275 | $97.94 | $9,331,234 | 443,601.76 | No | Form 4 |
| DeLuca Richard R.EVP&Pres, Merck Animal Heallth | Jan 27, 2025 | Jan 29, 2025 | A | 25,438 | $97.94 | $2,491,398 | 178,992.71 | No | Form 4 |
| Downing Cristal NChief Comm. & Public Afrs Ofcr | Jan 27, 2025 | Jan 29, 2025 | A | 9,446 | $97.94 | $925,141 | 9,446 | No | Form 4 |
| Li Dean YExecutive VP & President, MRL | Jan 27, 2025 | Jan 29, 2025 | A | 32,621 | $97.94 | $3,194,901 | 79,592.15 | No | Form 4 |
| Litchfield CarolineEVP & CFO | Jan 27, 2025 | Jan 29, 2025 | A | 23,432 | $97.94 | $2,294,930 | 74,340.19 | No | Form 4 |
| Oosthuizen Johannes JacobusPresident, U.S. Market | Jan 27, 2025 | Jan 29, 2025 | A | 8,664 | $97.94 | $848,552 | 32,607.47 | No | Form 4 |
| Smart DaltonSVP Fin. - Global Controller | Jan 27, 2025 | Jan 29, 2025 | A | 2,586 | $97.94 | $253,273 | 7,014.29 | No | Form 4 |
| Williams David MichaelEVP,Chief Info&Digital Officer | Jan 27, 2025 | Jan 29, 2025 | A | 10,246 | $97.94 | $1,003,493 | 30,123.32 | No | Form 4 |
| Zachary JenniferEVP, General Counsel | Jan 27, 2025 | Jan 29, 2025 | A | 25,423 | $97.94 | $2,489,929 | 55,285.69 | No | Form 4 |
| Karsanbhai Surendralal Lanca | Jan 1, 2025 | Jan 3, 2025 | A · derivative | 552.87 | $99.48 | $55,000 | 552.87 | No | Form 4 |
| Coe Mary Ellen | Dec 31, 2024 | Jan 3, 2025 | A · derivative | 301.57 | $99.48 | $30,000 | 24,041.08 | No | Form 4 |
| Glocer Thomas H | Dec 31, 2024 | Jan 3, 2025 | A · derivative | 490.05 | $99.48 | $48,750 | 98,246.67 | No | Form 4 |
| Seidman Christine E | Dec 31, 2024 | Jan 3, 2025 | A · derivative | 81.67 | $99.48 | $8,125 | 15,164.74 | No | Form 4 |
| Coe Mary Ellen | Sep 30, 2024 | Oct 1, 2024 | A · derivative | 264.18 | $113.56 | $30,000 | 23,574.22 | No | Form 4 |
| Glocer Thomas H | Sep 30, 2024 | Oct 1, 2024 | A · derivative | 429.29 | $113.56 | $48,750 | 97,074.95 | No | Form 4 |
| Seidman Christine E | Sep 30, 2024 | Oct 1, 2024 | A · derivative | 71.55 | $113.56 | $8,125 | 14,977.37 | No | Form 4 |
| Guindo ChirfiChief Marketing Officer | Aug 5, 2024 | Aug 6, 2024 | M | 36,901 | $115.20 | $4,250,995 | 57,781.59 | No | Form 4 |
| Guindo ChirfiChief Marketing Officer | Aug 5, 2024 | Aug 6, 2024 | F | 17,412 | $115.20 | $2,005,862 | 40,369.59 | No | Form 4 |
| Guindo ChirfiChief Marketing Officer | Aug 5, 2024 | Aug 6, 2024 | M · derivative | 36,901 | $0.00 | $0 | 36,903 | No | Form 4 |
| Coe Mary Ellen | Jun 28, 2024 | Jul 2, 2024 | A · derivative | 242.33 | $123.80 | $30,000 | 23,169.69 | No | Form 4 |
| Glocer Thomas H | Jun 28, 2024 | Jul 2, 2024 | A · derivative | 393.78 | $123.80 | $48,750 | 96,063.14 | No | Form 4 |
| Seidman Christine E | Jun 28, 2024 | Jul 2, 2024 | A · derivative | 65.63 | $123.80 | $8,125 | 14,815.52 | No | Form 4 |
| Lavizzo-Mourey Risa J | May 31, 2024 | Jun 4, 2024 | A · derivative | 1,752.43 | $125.54 | $220,000 | 12,120.43 | No | Form 4 |
| Mayo Stephen | May 31, 2024 | Jun 4, 2024 | A · derivative | 1,752.43 | $125.54 | $220,000 | 9,379.7 | No | Form 4 |
| Glocer Thomas H | May 31, 2024 | Jun 4, 2024 | A · derivative | 1,752.43 | $125.54 | $220,000 | 95,669.36 | No | Form 4 |
| Craig Pamela J. | May 31, 2024 | Jun 4, 2024 | A · derivative | 1,752.43 | $125.54 | $220,000 | 28,233.6 | No | Form 4 |
| Coe Mary Ellen | May 31, 2024 | Jun 4, 2024 | A · derivative | 1,752.43 | $125.54 | $220,000 | 22,927.36 | No | Form 4 |
| Baker Douglas M Jr | May 31, 2024 | Jun 4, 2024 | A · derivative | 1,752.43 | $125.54 | $220,000 | 6,281.51 | No | Form 4 |
| Thulin Inge G | May 31, 2024 | Jun 4, 2024 | A · derivative | 1,752.43 | $125.54 | $220,000 | 21,228.92 | No | Form 4 |
| Rothman Paul | May 31, 2024 | Jun 4, 2024 | A · derivative | 1,752.43 | $125.54 | $220,000 | 28,233.61 | No | Form 4 |
| Warden Kathy J | May 31, 2024 | Jun 4, 2024 | A · derivative | 1,752.43 | $125.54 | $220,000 | 12,252.5 | No | Form 4 |
| Seidman Christine E | May 31, 2024 | Jun 4, 2024 | A · derivative | 1,752.43 | $125.54 | $220,000 | 14,749.89 | No | Form 4 |
| Russo Patricia F | May 31, 2024 | Jun 4, 2024 | A · derivative | 1,752.43 | $125.54 | $220,000 | 53,951.8 | No | Form 4 |
| Oosthuizen Johannes JacobusPresident, U.S. Market | May 4, 2024 | May 6, 2024 | M | 912 | $127.51 | $116,289 | 24,270.95 | No | Form 4 |
| Oosthuizen Johannes JacobusPresident, U.S. Market | May 4, 2024 | May 6, 2024 | F | 450 | $127.51 | $57,380 | 23,820.95 | No | Form 4 |
| Oosthuizen Johannes JacobusPresident, U.S. Market | May 4, 2024 | May 6, 2024 | M · derivative | 912 | $0.00 | $0 | not reported | No | Form 4 |
| Klobuchar Michael AEVP - Chief Strategy Officer | May 4, 2024 | May 6, 2024 | M | 887 | $127.51 | $113,101 | 24,058.2 | No | Form 4 |
| Klobuchar Michael AEVP - Chief Strategy Officer | May 4, 2024 | May 6, 2024 | F | 437 | $127.51 | $55,722 | 23,621.2 | No | Form 4 |
| Klobuchar Michael AEVP - Chief Strategy Officer | May 4, 2024 | May 6, 2024 | M · derivative | 887 | $0.00 | $0 | not reported | No | Form 4 |
| DeLuca Richard R.EVP&Pres, Merck Animal Heallth | May 4, 2024 | May 6, 2024 | M | 27,126 | $127.51 | $3,458,836 | 163,719.56 | No | Form 4 |
| DeLuca Richard R.EVP&Pres, Merck Animal Heallth | May 4, 2024 | May 6, 2024 | F | 13,360 | $127.51 | $1,703,534 | 150,359.56 | No | Form 4 |
| DeLuca Richard R.EVP&Pres, Merck Animal Heallth | May 4, 2024 | May 6, 2024 | M · derivative | 27,126 | $0.00 | $0 | not reported | No | Form 4 |
| Smart DaltonSVP Fin. - Global Controller | May 4, 2024 | May 6, 2024 | M | 612 | $127.51 | $78,036 | 4,730.29 | No | Form 4 |
| Smart DaltonSVP Fin. - Global Controller | May 4, 2024 | May 6, 2024 | F | 302 | $127.51 | $38,508 | 4,428.29 | No | Form 4 |
| Smart DaltonSVP Fin. - Global Controller | May 4, 2024 | May 6, 2024 | M · derivative | 612 | $0.00 | $0 | not reported | No | Form 4 |
| Smart DaltonSVP Fin. - Global Controller | May 3, 2024 | May 6, 2024 | M | 516 | $128.26 | $66,182 | 3,433.29 | No | Form 4 |
| Smart DaltonSVP Fin. - Global Controller | May 3, 2024 | May 6, 2024 | F | 255 | $128.26 | $32,706 | 3,178.29 | No | Form 4 |
| Smart DaltonSVP Fin. - Global Controller | May 3, 2024 | May 6, 2024 | M | 1,530 | $128.26 | $196,238 | 4,708.29 | No | Form 4 |
| Smart DaltonSVP Fin. - Global Controller | May 3, 2024 | May 6, 2024 | F | 590 | $128.26 | $75,673 | 4,118.29 | No | Form 4 |
| Smart DaltonSVP Fin. - Global Controller | May 3, 2024 | May 6, 2024 | M · derivative | 516 | $0.00 | $0 | 518 | No | Form 4 |
| Smart DaltonSVP Fin. - Global Controller | May 3, 2024 | May 6, 2024 | M · derivative | 1,530 | $0.00 | $0 | 1,532 | No | Form 4 |
| Smart DaltonSVP Fin. - Global Controller | May 2, 2024 | May 2, 2024 | M | 381 | $128.80 | $49,073 | 3,048.29 | No | Form 4 |
| Smart DaltonSVP Fin. - Global Controller | May 2, 2024 | May 2, 2024 | F | 131 | $128.80 | $16,873 | 2,917.29 | No | Form 4 |
| Smart DaltonSVP Fin. - Global Controller | May 2, 2024 | May 2, 2024 | M · derivative | 381 | $0.00 | $0 | 764 | No | Form 4 |
| Romanelli JosephPresident, Human Health Int?l | May 2, 2024 | May 2, 2024 | M | 2,262 | $128.80 | $291,346 | 21,831.33 | No | Form 4 |
| Romanelli JosephPresident, Human Health Int?l | May 2, 2024 | May 2, 2024 | F | 1,115 | $128.80 | $143,612 | 20,716.33 | No | Form 4 |
| Romanelli JosephPresident, Human Health Int?l | May 2, 2024 | May 2, 2024 | M · derivative | 2,262 | $0.00 | $0 | 4,524 | No | Form 4 |
| DeLuca Richard R.EVP&Pres, Merck Animal Heallth | Apr 30, 2024 | May 2, 2024 | A · derivative | 23,216 | $0.00 | $0 | 23,216 | No | Form 4 |
| DeLuca Richard R.EVP&Pres, Merck Animal Heallth | Apr 30, 2024 | May 2, 2024 | A · derivative | 37,500 | $129.22 | $4,845,750 | 37,500 | No | Form 4 |
| Litchfield CarolineEVP & CFO | Apr 30, 2024 | May 2, 2024 | A · derivative | 49,805 | $129.22 | $6,435,802 | 49,805 | No | Form 4 |
| Klobuchar Michael AEVP - Chief Strategy Officer | Apr 30, 2024 | May 2, 2024 | A · derivative | 20,508 | $129.22 | $2,650,044 | 20,508 | No | Form 4 |
| Williams David MichaelEVP,Chief Info&Digital Officer | Apr 30, 2024 | May 2, 2024 | A · derivative | 16,406 | $129.22 | $2,119,983 | 16,406 | No | Form 4 |
| Chattopadhyay SanatExe V-P & Pres. MMD | Apr 30, 2024 | May 2, 2024 | A · derivative | 38,672 | $129.22 | $4,997,196 | 38,672 | No | Form 4 |
| Davis Robert MChairman, CEO & President | Apr 30, 2024 | May 2, 2024 | A · derivative | 181,641 | $129.22 | $23,471,650 | 181,641 | No | Form 4 |
| Oosthuizen Johannes JacobusPresident, U.S. Market | Apr 30, 2024 | May 2, 2024 | A · derivative | 20,508 | $129.22 | $2,650,044 | 20,508 | No | Form 4 |
| Li Dean YExecutive VP & President, MRL | Apr 30, 2024 | May 2, 2024 | A · derivative | 65,625 | $129.22 | $8,480,063 | 65,625 | No | Form 4 |
| Zachary JenniferEVP, General Counsel | Apr 30, 2024 | May 2, 2024 | A · derivative | 35,156 | $129.22 | $4,542,858 | 35,156 | No | Form 4 |
| Downing Cristal NChief Comm. & Public Afrs Ofcr | Apr 30, 2024 | May 2, 2024 | A · derivative | 15,234 | $129.22 | $1,968,537 | 15,234 | No | Form 4 |
| Guindo ChirfiChief Marketing Officer | Apr 30, 2024 | May 2, 2024 | A · derivative | 29,297 | $129.22 | $3,785,758 | 29,297 | No | Form 4 |
| Smart DaltonSVP Fin. - Global Controller | Apr 30, 2024 | May 2, 2024 | A · derivative | 1,393 | $0.00 | $0 | 1,393 | No | Form 4 |
| Smart DaltonSVP Fin. - Global Controller | Apr 30, 2024 | May 2, 2024 | A · derivative | 7,031 | $129.22 | $908,546 | 7,031 | No | Form 4 |
| Larson Betty DEVP, Chief HR Officer | Apr 30, 2024 | May 2, 2024 | A · derivative | 34,050 | $0.00 | $0 | 34,050 | No | Form 4 |
| Larson Betty DEVP, Chief HR Officer | Apr 30, 2024 | May 2, 2024 | A · derivative | 58,594 | $129.22 | $7,571,517 | 58,594 | No | Form 4 |
| Larson Betty DEVP, Chief HR Officer | Apr 30, 2024 | May 2, 2024 | A · derivative | 31,055 | $129.22 | $4,012,927 | 31,055 | No | Form 4 |
| Romanelli JosephPresident, Human Health Int?l | Apr 30, 2024 | May 2, 2024 | A · derivative | 6,191 | $0.00 | $0 | 6,191 | No | Form 4 |
| Romanelli JosephPresident, Human Health Int?l | Apr 30, 2024 | May 2, 2024 | A · derivative | 23,438 | $129.22 | $3,028,658 | 23,438 | No | Form 4 |
| Coe Mary Ellen | Mar 28, 2024 | Mar 29, 2024 | A · derivative | 227.36 | $131.95 | $30,000 | 21,049.66 | No | Form 4 |
| Glocer Thomas H | Mar 28, 2024 | Mar 29, 2024 | A · derivative | 341.04 | $131.95 | $45,000 | 93,360.4 | No | Form 4 |
| Seidman Christine E | Mar 28, 2024 | Mar 29, 2024 | A · derivative | 61.58 | $131.95 | $8,125 | 12,920.11 | No | Form 4 |
| Wendell Peter C | Mar 28, 2024 | Mar 29, 2024 | A · derivative | 227.36 | $131.95 | $30,000 | 124,752.62 | No | Form 4 |
| Davis Robert MChairman, CEO & President | Feb 14, 2024 | Feb 15, 2024 | M | 85,021 | $73.73 | $6,268,598 | 433,347.76 | No | Form 4 |
| Davis Robert MChairman, CEO & President | Feb 14, 2024 | Feb 15, 2024 | S | 85,021 | $125.40 | Sale −$10,661,633 | 348,326.76 | No | Form 4 |
| Davis Robert MChairman, CEO & President | Feb 14, 2024 | Feb 15, 2024 | M · derivative | 85,021 | $73.73 | $6,268,598 | 96,760 | No | Form 4 |
| Litchfield CarolineEVP & CFO | Feb 14, 2024 | Feb 15, 2024 | M | 38,291 | $58.08 | $2,223,941 | 89,199.19 | No | Form 4 |
| Litchfield CarolineEVP & CFO | Feb 14, 2024 | Feb 15, 2024 | S | 38,291 | $125.50 | Sale −$4,805,521 | 50,908.19 | No | Form 4 |
| Litchfield CarolineEVP & CFO | Feb 14, 2024 | Feb 15, 2024 | M · derivative | 38,291 | $58.08 | $2,223,941 | not reported | No | Form 4 |
| Davis Robert MChairman, CEO & President | Feb 13, 2024 | Feb 15, 2024 | M | 41,509 | $75.36 | $3,128,118 | 389,835.76 | No | Form 4 |
| Davis Robert MChairman, CEO & President | Feb 13, 2024 | Feb 15, 2024 | M | 108,491 | $73.73 | $7,999,041 | 498,326.76 | No | Form 4 |
| Davis Robert MChairman, CEO & President | Feb 13, 2024 | Feb 15, 2024 | S | 124,676 | $125.74 | Sale −$15,676,760 | 373,650.76 | No | Form 4 |
| Davis Robert MChairman, CEO & President | Feb 13, 2024 | Feb 15, 2024 | S | 25,324 | $126.37 | Sale −$3,200,194 | 348,326.76 | No | Form 4 |
| Davis Robert MChairman, CEO & President | Feb 13, 2024 | Feb 15, 2024 | M · derivative | 41,509 | $75.36 | $3,128,118 | 83,020 | No | Form 4 |
| Davis Robert MChairman, CEO & President | Feb 13, 2024 | Feb 15, 2024 | M · derivative | 108,491 | $73.73 | $7,999,041 | 181,781 | No | Form 4 |
| Romanelli JosephPresident, Human Health Int?l | Feb 13, 2024 | Feb 14, 2024 | S | 1,000 | $124.89 | Sale −$124,890 | 19,569.33 | No | Form 4 |
| Li Dean YExecutive VP & President, MRL | Feb 9, 2024 | Feb 12, 2024 | M | 14,702 | $62.07 | $912,553 | 60,944.37 | No | Form 4 |
| Li Dean YExecutive VP & President, MRL | Feb 9, 2024 | Feb 12, 2024 | S | 14,702 | $125.50 | Sale −$1,845,101 | 46,242.37 | No | Form 4 |
| Li Dean YExecutive VP & President, MRL | Feb 9, 2024 | Feb 12, 2024 | M · derivative | 14,702 | $62.07 | $912,553 | not reported | No | Form 4 |
| Williams David MichaelEVP,Chief Info&Digital Officer | Feb 7, 2024 | Feb 8, 2024 | S | 1,451 | $127.57 | Sale −$185,104 | 19,811.67 | No | Form 4 |
| Oosthuizen Johannes JacobusPresident, U.S. Market | Feb 2, 2024 | Feb 5, 2024 | M | 6,773 | $75.36 | $510,413 | 28,122.35 | No | Form 4 |
| Oosthuizen Johannes JacobusPresident, U.S. Market | Feb 2, 2024 | Feb 5, 2024 | M | 7,045 | $73.73 | $519,428 | 35,167.35 | No | Form 4 |
| Oosthuizen Johannes JacobusPresident, U.S. Market | Feb 2, 2024 | Feb 5, 2024 | M | 7,119 | $87.10 | $620,065 | 42,286.35 | No | Form 4 |
| Oosthuizen Johannes JacobusPresident, U.S. Market | Feb 2, 2024 | Feb 5, 2024 | S | 18,959 | $127.18 | Sale −$2,411,206 | 23,327.35 | No | Form 4 |
| Oosthuizen Johannes JacobusPresident, U.S. Market | Feb 2, 2024 | Feb 5, 2024 | M · derivative | 6,773 | $75.36 | $510,413 | not reported | No | Form 4 |
| Oosthuizen Johannes JacobusPresident, U.S. Market | Feb 2, 2024 | Feb 5, 2024 | M · derivative | 7,045 | $73.73 | $519,428 | 7,049 | No | Form 4 |
| Oosthuizen Johannes JacobusPresident, U.S. Market | Feb 2, 2024 | Feb 5, 2024 | M · derivative | 7,119 | $87.10 | $620,065 | 14,240 | No | Form 4 |
| Zachary JenniferEVP, General Counsel | Feb 2, 2024 | Feb 2, 2024 | M | 19,417 | $87.10 | $1,691,221 | 78,556.76 | No | Form 4 |
| Zachary JenniferEVP, General Counsel | Feb 2, 2024 | Feb 2, 2024 | S | 49,499 | $126.97 | Sale −$6,284,888 | 29,057.76 | No | Form 4 |
| Zachary JenniferEVP, General Counsel | Feb 2, 2024 | Feb 2, 2024 | M · derivative | 19,417 | $87.10 | $1,691,221 | 38,835 | No | Form 4 |
| Mizell StevenEVP, Chief HR Officer | Feb 2, 2024 | Feb 2, 2024 | M | 824 | $70.71 | $58,265 | 42,143.15 | No | Form 4 |
| Mizell StevenEVP, Chief HR Officer | Feb 2, 2024 | Feb 2, 2024 | M | 32,170 | $73.73 | $2,371,894 | 74,313.15 | No | Form 4 |
| Mizell StevenEVP, Chief HR Officer | Feb 2, 2024 | Feb 2, 2024 | S | 50,694 | $126.65 | Sale −$6,420,395 | 23,619.15 | No | Form 4 |
| Mizell StevenEVP, Chief HR Officer | Feb 2, 2024 | Feb 2, 2024 | M · derivative | 824 | $70.71 | $58,265 | not reported | No | Form 4 |
| Mizell StevenEVP, Chief HR Officer | Feb 2, 2024 | Feb 2, 2024 | M · derivative | 32,170 | $73.73 | $2,371,894 | 22,088 | No | Form 4 |
| Klobuchar Michael AEVP - Chief Strategy Officer | Jan 22, 2024 | Jan 24, 2024 | A | 3,896 | $119.43 | $465,299 | 23,098.14 | No | Form 4 |
| Litchfield CarolineEVP & CFO | Jan 22, 2024 | Jan 24, 2024 | A | 19,208 | $119.43 | $2,294,011 | 50,908.19 | No | Form 4 |
| Chattopadhyay SanatExe V-P & Pres. MMD | Jan 22, 2024 | Jan 24, 2024 | A | 26,716 | $119.43 | $3,190,692 | 26,716 | No | Form 4 |
| DeLuca Richard R.EVP&Pres, Merck Animal Heallth | Jan 22, 2024 | Jan 24, 2024 | A | 23,296 | $119.43 | $2,782,241 | 135,782.98 | No | Form 4 |
| Davis Robert MChairman, CEO & President | Jan 22, 2024 | Jan 24, 2024 | A | 76,510 | $119.43 | $9,137,589 | 348,326.76 | No | Form 4 |
| Li Dean YExecutive VP & President, MRL | Jan 22, 2024 | Jan 24, 2024 | A | 25,760 | $119.43 | $3,076,517 | 46,242.37 | No | Form 4 |
| Zachary JenniferEVP, General Counsel | Jan 22, 2024 | Jan 24, 2024 | A | 23,298 | $119.43 | $2,782,480 | 59,139.76 | No | Form 4 |
| Mizell StevenEVP, Chief HR Officer | Jan 22, 2024 | Jan 24, 2024 | A | 18,384 | $119.43 | $2,195,601 | 41,319.15 | No | Form 4 |
| Williams David MichaelEVP,Chief Info&Digital Officer | Jan 22, 2024 | Jan 24, 2024 | A | 10,196 | $119.43 | $1,217,708 | 21,262.67 | No | Form 4 |
| Smart DaltonSVP Fin. - Global Controller | Jan 22, 2024 | Jan 24, 2024 | A | 2,661 | $119.43 | $317,803 | 2,667.25 | No | Form 4 |
| Oosthuizen Johannes JacobusPresident, U.S. Market | Jan 22, 2024 | Jan 24, 2024 | A | 3,133 | $119.43 | $374,174 | 21,349.35 | No | Form 4 |
| Coe Mary Ellen | Dec 29, 2023 | Jan 2, 2024 | A · derivative | 275.18 | $109.02 | $30,000 | 20,688.4 | No | Form 4 |
| Glocer Thomas H | Dec 29, 2023 | Jan 2, 2024 | A · derivative | 412.77 | $109.02 | $45,000 | 92,419.17 | No | Form 4 |
| Seidman Christine E | Dec 29, 2023 | Jan 2, 2024 | A · derivative | 74.53 | $109.02 | $8,125 | 12,775.22 | No | Form 4 |
| Wendell Peter C | Dec 29, 2023 | Jan 2, 2024 | A · derivative | 275.18 | $109.02 | $30,000 | 123,715.51 | No | Form 4 |
| Oosthuizen Johannes JacobusPresident, U.S. Market | Nov 9, 2023 | Nov 13, 2023 | S | 2,081 | $102.38 | Sale −$213,053 | 18,190.66 | No | Form 4 |
| DeLuca Richard R.EVP&Pres, Merck Animal Heallth | Nov 8, 2023 | Nov 9, 2023 | S | 43,823 | $105.03 | Sale −$4,602,730 | 111,763.59 | No | Form 4 |
| Downing Cristal NChief Comm. & Public Afrs Ofcr | Oct 31, 2023 | Nov 1, 2023 | A · derivative | 11,685 | $0.00 | $0 | 11,685 | No | Form 4 |
| Oosthuizen Johannes JacobusPresident, U.S. Market | Oct 30, 2023 | Oct 31, 2023 | M | 915 | $102.82 | $94,080 | 20,722.66 | No | Form 4 |
| Oosthuizen Johannes JacobusPresident, U.S. Market | Oct 30, 2023 | Oct 31, 2023 | F | 451 | $102.82 | $46,372 | 20,271.66 | No | Form 4 |
| Oosthuizen Johannes JacobusPresident, U.S. Market | Oct 30, 2023 | Oct 31, 2023 | M · derivative | 915 | $0.00 | $0 | not reported | No | Form 4 |
| Coe Mary Ellen | Sep 29, 2023 | Oct 3, 2023 | A · derivative | 291.4 | $102.95 | $30,000 | 20,272.8 | No | Form 4 |
| Glocer Thomas H | Sep 29, 2023 | Oct 3, 2023 | A · derivative | 437.11 | $102.95 | $45,000 | 91,370.99 | No | Form 4 |
| Seidman Christine E | Sep 29, 2023 | Oct 3, 2023 | A · derivative | 78.92 | $102.95 | $8,125 | 12,612.61 | No | Form 4 |
| Wendell Peter C | Sep 29, 2023 | Oct 3, 2023 | A · derivative | 291.4 | $102.95 | $30,000 | 122,580.96 | No | Form 4 |