Company / CIK 0000310158
Merck & Co., Inc.
MRK · 8 insiders on file
Merck & Co., Inc. (MRK) has 8 insiders on file who disclosed 36 transactions in the last 12 months (0 open-market buys, 17 sales, about $41.5M at reported prices). No federal award to a recipient with exactly this name appears in the last 180 days; no lobbying filing names it as client this year.
Insiders
| Name | Role | Transactions | Last filed |
|---|---|---|---|
| Guindo Chirfi | EVP, Access, Policy & Comms | 2 | August 13, 2026 |
| Zachary Jennifer | EVP, General Counsel | 5 | August 13, 2026 |
| DeLuca Richard R. | EVP&Pres, Merck Animal Heallth | 8 | August 12, 2026 |
| Maraldo David R. | EVP & Pres. MMD | 9 | August 7, 2026 |
| Williams David Michael | EVP,Chief Info&Digital Officer | 9 | August 7, 2026 |
| Seidman Christine E | Director | 1 | July 1, 2026 |
| Karsanbhai Surendralal Lanca | Director | 1 | July 1, 2026 |
| Coe Mary Ellen | Director | 1 | July 1, 2026 |
Insider transactions
| Filer | Security | Side | Trade date | Disclosed | Lag | Shares | Price | Value | Flags | Source |
|---|---|---|---|---|---|---|---|---|---|---|
| Zachary Jennifer | MRK | Option / conversion M | August 12, 2026 | August 13, 2026 | 1d | 13,433 | — | — | derivative | Form 4 ↗ |
| Zachary Jennifer | MRK | Option / conversion M | August 12, 2026 | August 13, 2026 | 1d | 41,494 | — | — | derivative | Form 4 ↗ |
| Zachary Jennifer | MRK | Sell S | August 12, 2026 | August 13, 2026 | 1d | 80,315 | $133 | $10.7M | Form 4 ↗ | |
| Zachary Jennifer | MRK | Option / conversion M | August 12, 2026 | August 13, 2026 | 1d | 13,433 | $85 | $1.1M | Form 4 ↗ | |
| Zachary Jennifer | MRK | Option / conversion M | August 12, 2026 | August 13, 2026 | 1d | 41,494 | $118 | $4.9M | Form 4 ↗ | |
| Guindo Chirfi | MRK | Sell S | August 13, 2026 | August 13, 2026 | 0d | 10,000 | $135 | $1.4M | Form 4 ↗ | |
| DeLuca Richard R. | MRK | Sell S | August 12, 2026 | August 12, 2026 | 0d | 600 | $132 | $79K | Form 4 ↗ | |
| DeLuca Richard R. | MRK | Sell S | August 12, 2026 | August 12, 2026 | 0d | 11,099 | $132 | $1.5M | Form 4 ↗ | |
| DeLuca Richard R. | MRK | Sell S | August 11, 2026 | August 12, 2026 | 1d | 5,427 | $132 | $718K | Form 4 ↗ | |
| DeLuca Richard R. | MRK | Sell S | August 11, 2026 | August 12, 2026 | 1d | 7,410 | $131 | $973K | Form 4 ↗ | |
| DeLuca Richard R. | MRK | Sell S | August 10, 2026 | August 12, 2026 | 2d | 20,784 | $130 | $2.7M | Form 4 ↗ | |
| DeLuca Richard R. | MRK | Sell S | August 6, 2026 | August 10, 2026 | 4d | 300 | $131 | $39K | Form 4 ↗ | |
| DeLuca Richard R. | MRK | Sell S | August 6, 2026 | August 10, 2026 | 4d | 4,945 | $130 | $644K | Form 4 ↗ | |
| DeLuca Richard R. | MRK | Sell S | August 6, 2026 | August 10, 2026 | 4d | 805 | $131 | $105K | Form 4 ↗ | |
| Guindo Chirfi | MRK | Sell S | August 6, 2026 | August 7, 2026 | 1d | 15,000 | $131 | $2.0M | Form 4 ↗ | |
| Williams David Michael | MRK | Option / conversion M | August 5, 2026 | August 7, 2026 | 2d | 34,705 | — | — | derivative | Form 4 ↗ |
| Williams David Michael | MRK | Option / conversion M | August 5, 2026 | August 7, 2026 | 2d | 13,542 | — | — | derivative | Form 4 ↗ |
| Williams David Michael | MRK | Option / conversion M | August 5, 2026 | August 7, 2026 | 2d | 4,600 | — | — | derivative | Form 4 ↗ |
| Williams David Michael | MRK | Sell S | August 5, 2026 | August 7, 2026 | 2d | 34,705 | $129 | $4.5M | Form 4 ↗ | |
| Williams David Michael | MRK | Option / conversion M | August 5, 2026 | August 7, 2026 | 2d | 34,705 | $74 | $2.6M | Form 4 ↗ | |
| Williams David Michael | MRK | Sell S | August 5, 2026 | August 7, 2026 | 2d | 13,542 | $129 | $1.7M | Form 4 ↗ | |
| Williams David Michael | MRK | Option / conversion M | August 5, 2026 | August 7, 2026 | 2d | 13,542 | $75 | $1.0M | Form 4 ↗ | |
| Williams David Michael | MRK | Sell S | August 5, 2026 | August 7, 2026 | 2d | 4,600 | $129 | $592K | Form 4 ↗ | |
| Williams David Michael | MRK | Option / conversion M | August 5, 2026 | August 7, 2026 | 2d | 4,600 | $78 | $357K | Form 4 ↗ | |
| Maraldo David R. | MRK | Option / conversion M | August 5, 2026 | August 7, 2026 | 2d | 2,686 | — | — | derivative | Form 4 ↗ |
| Maraldo David R. | MRK | Option / conversion M | August 5, 2026 | August 7, 2026 | 2d | 9,709 | — | — | derivative | Form 4 ↗ |
| Maraldo David R. | MRK | Option / conversion M | August 5, 2026 | August 7, 2026 | 2d | 6,311 | — | — | derivative | Form 4 ↗ |
| Maraldo David R. | MRK | Sell S | August 5, 2026 | August 7, 2026 | 2d | 2,686 | $129 | $346K | Form 4 ↗ | |
| Maraldo David R. | MRK | Option / conversion M | August 5, 2026 | August 7, 2026 | 2d | 2,686 | $85 | $228K | Form 4 ↗ | |
| Maraldo David R. | MRK | Sell S | August 5, 2026 | August 7, 2026 | 2d | 9,709 | $129 | $1.2M | Form 4 ↗ | |
| Maraldo David R. | MRK | Option / conversion M | August 5, 2026 | August 7, 2026 | 2d | 9,709 | $87 | $846K | Form 4 ↗ | |
| Maraldo David R. | MRK | Sell S | August 5, 2026 | August 7, 2026 | 2d | 6,311 | $129 | $812K | Form 4 ↗ | |
| Maraldo David R. | MRK | Option / conversion M | August 5, 2026 | August 7, 2026 | 2d | 6,311 | $74 | $465K | Form 4 ↗ | |
| Coe Mary Ellen | MRK | Other A | June 30, 2026 | July 1, 2026 | 1d | 233 | $129 | $30K | derivative | Form 4 ↗ |
| Karsanbhai Surendralal Lanca | MRK | Other A | June 30, 2026 | July 1, 2026 | 1d | 126 | $129 | $16K | derivative | Form 4 ↗ |
| Seidman Christine E | MRK | Other A | June 30, 2026 | July 1, 2026 | 1d | 63 | $129 | $8,125 | derivative | Form 4 ↗ |
Federal contracts (USAspending, last 180 days)
No award action to a recipient named exactly "Merck & Co., Inc." in the last 180 days. Subsidiaries and differently-spelled recipients are not matched — search contracts.
Lobbying (Senate LDA, as client)
No LDA filing names "Merck & Co., Inc." as the client in the last two years. Filings under a subsidiary or trade-association name are not matched — search lobbying.
Sources and method
Insiders and their transactions come from SEC EDGAR Form 4 filings for this issuer. Contracts and lobbying are matched by exact normalized name (suffixes like Inc./Corp. ignored) to USAspending recipients and LDA clients — a conservative match that misses subsidiaries on purpose. See methodology and corrections.
Not investment advice. Public records shown as filed; no recommendation is made or implied.