Company · CIK 0000310158 · SIC 2834 — Pharmaceutical Preparations · NYSE
Merck & Co., Inc. · MRK
Insider activity reported against this company. All insider holders · Files at: STRO, CFOR, YARW, ONC. On EDGAR ↗
Reported at this company — common stock
| Trade | Reported (ET) | Insider | Shares | Avg price | Total | Owned after | Δ stake | Flags |
|---|---|---|---|---|---|---|---|---|
| Aug 13, 2026 SForm 4 → | Aug 13, 5:02 pm EDT | Chirfi GuindoEVP, Access, Policy & Comms | 10,000 | $135.00 | $1,350,000 | 36,613 | −21.5% | |
| Aug 12, 2026 SForm 4 → | Aug 13, 4:11 pm EDT | Jennifer ZacharyEVP, General Counsel | 80,315 | $133.46 | $10,718,495 | 45,509 | −63.8% | |
| Aug 12, 2026 MForm 4 → | Aug 13, 4:11 pm EDT | Jennifer ZacharyEVP, General Counsel | 54,927 | $109.78 | $6,029,637 | 125,824 | — | |
| Aug 10, 2026 SForm 4 → | Aug 12, 4:10 pm EDT | Richard R. DeLucaEVP&Pres, Merck Animal Heallth | 45,320 | $131.12 | $5,942,369 | 110,167 | −29.1% | |
| Aug 6, 2026 SForm 4 → | Aug 10, 4:28 pm EDT | Richard R. DeLucaEVP&Pres, Merck Animal Heallth | 6,050 | $130.38 | $788,773 | 155,487 | −3.75% | |
| Aug 6, 2026 SForm 4 → | Aug 7, 4:17 pm EDT | Chirfi GuindoEVP, Access, Policy & Comms | 15,000 | $131.00 | $1,965,000 | 46,613 | −24.3% | |
| Aug 5, 2026 SForm 4 → | Aug 7, 4:21 pm EDT | David R. MaraldoEVP & Pres. MMD | 18,706 | $128.72 | $2,407,797 | 18,212 | −50.7% | |
| Aug 5, 2026 MForm 4 → | Aug 7, 4:21 pm EDT | David R. MaraldoEVP & Pres. MMD | 18,706 | $82.25 | $1,538,495 | 20,898 | — | |
| Aug 5, 2026 SForm 4 → | Aug 7, 4:19 pm EDT | David Michael WilliamsEVP,Chief Info&Digital Officer | 52,847 | $128.77 | $6,805,145 | 31,716 | −62.5% | |
| Aug 5, 2026 MForm 4 → | Aug 7, 4:19 pm EDT | David Michael WilliamsEVP,Chief Info&Digital Officer | 52,847 | $74.49 | $3,936,377 | 66,421 | — |
Reported at this company — derivatives (options, RSUs, warrants)
| Trade | Reported (ET) | Insider | Shares | Avg price | Total | Owned after | Δ stake | Flags |
|---|---|---|---|---|---|---|---|---|
| Aug 12, 2026 MForm 4 → | Aug 13, 4:11 pm EDT | Jennifer ZacharyEVP, General Counsel | 54,927 | — | — | 0 | — | |
| Aug 5, 2026 MForm 4 → | Aug 7, 4:21 pm EDT | David R. MaraldoEVP & Pres. MMD | 18,706 | — | — | 5,374 | — | |
| Aug 5, 2026 MForm 4 → | Aug 7, 4:19 pm EDT | David Michael WilliamsEVP,Chief Info&Digital Officer | 52,847 | — | — | 0 | — | |
| Jun 30, 2026 AForm 4 → | Jul 1, 8:47 am EDT | Christine E SeidmanDirector | 63 | $128.50 | $8,125 | 21,291 | — | |
| Jun 30, 2026 AForm 4 → | Jul 1, 8:44 am EDT | Surendralal Lanca KarsanbhaiDirector | 126 | $128.50 | $16,250 | 5,519 | — | |
| Jun 30, 2026 AForm 4 → | Jul 1, 8:41 am EDT | Mary Ellen CoeDirector | 233 | $128.50 | $30,000 | 31,999 | — |
Filed by this entity as an insider elsewhere — common stock
No reported common-stock activity in this period.
Filed by this entity as an insider elsewhere — derivatives (options, RSUs, warrants)
No reported derivative activity in this period.