The public view is the crawlable proof. The same sourced dataset is available through REST and MCP for agents, research scripts, and back-office tools.
| Date | Insider | Role | Action | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Aug 13, 2026 | Guindo Chirfi | EVP, Access, Policy & Comms | Sell(S) | 10K | $135.00 | $1.4M |
| Aug 12, 2026 | DeLuca Richard R. | EVP&Pres, Merck Animal Heallth | Sell(S) | 11K | $131.61 | $1.5M |
| Aug 12, 2026 | DeLuca Richard R. | EVP&Pres, Merck Animal Heallth | Sell(S) | 600 | $132.04 | $79K |
| Aug 12, 2026 | Zachary Jennifer | EVP, General Counsel | Option exercise(M) | 41K | $117.89 | $4.9M |
| Aug 12, 2026 | Zachary Jennifer | EVP, General Counsel | Option exercise(M) | 13K | $84.71 | $1.1M |
| Aug 12, 2026 | Zachary Jennifer | EVP, General Counsel | Sell(S) | 80K | $133.46 | $10.7M |
| Aug 12, 2026 | Zachary Jennifer | EVP, General Counsel | Option exercise(M) | 41K | — | $0 |
| Aug 12, 2026 | Zachary Jennifer | EVP, General Counsel | Option exercise(M) | 13K | — | $0 |
| Aug 11, 2026 | DeLuca Richard R. | EVP&Pres, Merck Animal Heallth | Sell(S) | 7K | $131.33 | $973K |
| Aug 11, 2026 | DeLuca Richard R. | EVP&Pres, Merck Animal Heallth | Sell(S) | 5K | $132.35 | $718K |
| Aug 10, 2026 | DeLuca Richard R. | EVP&Pres, Merck Animal Heallth | Sell(S) | 21K | $130.43 | $2.7M |
| Aug 6, 2026 | Guindo Chirfi | EVP, Access, Policy & Comms | Sell(S) | 15K | $131.00 | $2.0M |
| Aug 6, 2026 | DeLuca Richard R. | EVP&Pres, Merck Animal Heallth | Sell(S) | 805 | $131.02 | $105K |
| Aug 6, 2026 | DeLuca Richard R. | EVP&Pres, Merck Animal Heallth | Sell(S) | 5K | $130.23 | $644K |
| Aug 6, 2026 | DeLuca Richard R. | EVP&Pres, Merck Animal Heallth | Sell(S) | 300 | $131.02 | $39K |
| Aug 5, 2026 | Williams David Michael | EVP,Chief Info&Digital Officer | Option exercise(M) | 5K | $77.62 | $357K |
| Aug 5, 2026 | Williams David Michael | EVP,Chief Info&Digital Officer | Sell(S) | 5K | $128.77 | $592K |
| Aug 5, 2026 | Williams David Michael | EVP,Chief Info&Digital Officer | Option exercise(M) | 14K | $75.36 | $1.0M |
| Aug 5, 2026 | Williams David Michael | EVP,Chief Info&Digital Officer | Sell(S) | 14K | $128.77 | $1.7M |
| Aug 5, 2026 | Williams David Michael | EVP,Chief Info&Digital Officer | Option exercise(M) | 35K | $73.73 | $2.6M |
| Aug 5, 2026 | Williams David Michael | EVP,Chief Info&Digital Officer | Sell(S) | 35K | $128.77 | $4.5M |
| Aug 5, 2026 | Williams David Michael | EVP,Chief Info&Digital Officer | Option exercise(M) | 5K | — | $0 |
| Aug 5, 2026 | Williams David Michael | EVP,Chief Info&Digital Officer | Option exercise(M) | 14K | — | $0 |
| Aug 5, 2026 | Williams David Michael | EVP,Chief Info&Digital Officer | Option exercise(M) | 35K | — | $0 |
| Aug 5, 2026 | Maraldo David R. | EVP & Pres. MMD | Option exercise(M) | 6K | $73.73 | $465K |
| Aug 5, 2026 | Maraldo David R. | EVP & Pres. MMD | Sell(S) | 6K | $128.72 | $812K |
| Aug 5, 2026 | Maraldo David R. | EVP & Pres. MMD | Option exercise(M) | 10K | $87.10 | $846K |
| Aug 5, 2026 | Maraldo David R. | EVP & Pres. MMD | Sell(S) | 10K | $128.72 | $1.2M |
| Aug 5, 2026 | Maraldo David R. | EVP & Pres. MMD | Option exercise(M) | 3K | $84.71 | $228K |
| Aug 5, 2026 | Maraldo David R. | EVP & Pres. MMD | Sell(S) | 3K | $128.72 | $346K |
| Aug 5, 2026 | Maraldo David R. | EVP & Pres. MMD | Option exercise(M) | 6K | — | $0 |
| Aug 5, 2026 | Maraldo David R. | EVP & Pres. MMD | Option exercise(M) | 10K | — | $0 |
| Aug 5, 2026 | Maraldo David R. | EVP & Pres. MMD | Option exercise(M) | 3K | — | $0 |
| Jun 30, 2026 | Coe Mary Ellen | Director | Grant(A) | 233 | $128.50 | $30K |
| Jun 30, 2026 | Karsanbhai Surendralal Lanca | Director | Grant(A) | 126 | $128.50 | $16K |
| Jun 30, 2026 | Seidman Christine E | Director | Grant(A) | 63 | $128.50 | $8K |
| May 29, 2026 | Coe Mary Ellen | Director | Grant(A) | 2K | $118.72 | $220K |
| May 29, 2026 | Baker Douglas M JR | Director | Grant(A) | 2K | $118.72 | $220K |
| May 29, 2026 | Craig Pamela J. | Director | Grant(A) | 2K | $118.72 | $220K |
| May 29, 2026 | Glocer Thomas H | Director | Grant(A) | 2K | $118.72 | $220K |
| May 29, 2026 | Karsanbhai Surendralal Lanca | Director | Grant(A) | 2K | $118.72 | $220K |
| May 29, 2026 | Rothman Paul | Director | Grant(A) | 2K | $118.72 | $220K |
| May 29, 2026 | Russo Patricia F | Director | Grant(A) | 2K | $118.72 | $220K |
| May 29, 2026 | Lavizzo-Mourey Risa J | Director | Grant(A) | 2K | $118.72 | $220K |
| May 29, 2026 | Mayo Stephen | Director | Grant(A) | 2K | $118.72 | $220K |
| May 29, 2026 | Seidman Christine E | Director | Grant(A) | 2K | $118.72 | $220K |
| May 29, 2026 | Thulin Inge G | Director | Grant(A) | 2K | $118.72 | $220K |
| May 29, 2026 | Warden Kathy J | Director | Grant(A) | 2K | $118.72 | $220K |
| May 5, 2026 | Davis Robert M | Chairman, CEO & President, Director | Grant(A) | 48K | — | $0 |
| May 5, 2026 | Davis Robert M | Chairman, CEO & President, Director | Grant(A) | 140K | — | $0 |
| May 5, 2026 | DeLuca Richard R. | EVP&Pres, Merck Animal Heallth | Grant(A) | 12K | — | $0 |
| May 5, 2026 | DeLuca Richard R. | EVP&Pres, Merck Animal Heallth | Grant(A) | 35K | — | $0 |
| May 5, 2026 | Maraldo David R. | EVP & Pres. MMD | Grant(A) | 7K | — | $0 |
| May 5, 2026 | Maraldo David R. | EVP & Pres. MMD | Grant(A) | 22K | — | $0 |
| May 5, 2026 | Smart Dalton E. III | SVP Fin. - Global Controller | Grant(A) | 2K | — | $0 |
| May 5, 2026 | Smart Dalton E. III | SVP Fin. - Global Controller | Grant(A) | 5K | — | $0 |
| May 5, 2026 | Oosthuizen Johannes Jacobus | EVP, Oncology & Int?l | Grant(A) | 11K | — | $0 |
| May 5, 2026 | Oosthuizen Johannes Jacobus | EVP, Oncology & Int?l | Grant(A) | 31K | — | $0 |
| May 5, 2026 | Williams David Michael | EVP,Chief Info&Digital Officer | Grant(A) | 5K | — | $0 |
| May 5, 2026 | Foard Brian | EVP, Specialty, Pharma, & ID | Grant(A) | 11K | — | $0 |
| May 5, 2026 | Foard Brian | EVP, Specialty, Pharma, & ID | Grant(A) | 35K | — | $0 |
| May 5, 2026 | Foard Brian | EVP, Specialty, Pharma, & ID | Grant(A) | 31K | — | $0 |
| May 5, 2026 | Guindo Chirfi | EVP, Access, Policy & Comms | Grant(A) | 7K | — | $0 |
| May 5, 2026 | Guindo Chirfi | EVP, Access, Policy & Comms | Grant(A) | 19K | — | $0 |
| May 5, 2026 | Larson Betty D | EVP, Chief HR Officer | Grant(A) | 8K | — | $0 |
| May 5, 2026 | Larson Betty D | EVP, Chief HR Officer | Grant(A) | 23K | — | $0 |
| May 5, 2026 | Li Dean Y | Executive VP & President, MRL | Grant(A) | 20K | — | $0 |
| May 5, 2026 | Li Dean Y | Executive VP & President, MRL | Grant(A) | 58K | — | $0 |
| May 5, 2026 | Litchfield Caroline | EVP & CFO | Grant(A) | 16K | — | $0 |
| May 5, 2026 | Litchfield Caroline | EVP & CFO | Grant(A) | 47K | — | $0 |
| May 5, 2026 | Williams David Michael | EVP,Chief Info&Digital Officer | Grant(A) | 14K | — | $0 |
| May 5, 2026 | Zachary Jennifer | EVP, General Counsel | Grant(A) | 12K | — | $0 |
| May 5, 2026 | Zachary Jennifer | EVP, General Counsel | Grant(A) | 35K | — | $0 |
| May 2, 2026 | Maraldo David R. | EVP & Pres. MMD | Option exercise(M) | 552 | $112.16 | $62K |
| May 2, 2026 | Maraldo David R. | EVP & Pres. MMD | Tax withholding(F) | 159 | $112.16 | $18K |
| May 2, 2026 | Maraldo David R. | EVP & Pres. MMD | Option exercise(M) | 552 | — | $0 |
| May 2, 2026 | Smart Dalton E. III | SVP Fin. - Global Controller | Option exercise(M) | 383 | $112.16 | $43K |
| May 2, 2026 | Smart Dalton E. III | SVP Fin. - Global Controller | Tax withholding(F) | 132 | $112.16 | $15K |
| May 2, 2026 | Smart Dalton E. III | SVP Fin. - Global Controller | Option exercise(M) | 383 | — | $0 |
| Apr 30, 2026 | Larson Betty D | EVP, Chief HR Officer | Option exercise(M) | 11K | $110.95 | $1.3M |
| Apr 30, 2026 | Larson Betty D | EVP, Chief HR Officer | Tax withholding(F) | 5K | $110.95 | $571K |
| Apr 30, 2026 | Larson Betty D | EVP, Chief HR Officer | Option exercise(M) | 11K | — | $0 |
| Apr 30, 2026 | Smart Dalton E. III | SVP Fin. - Global Controller | Option exercise(M) | 464 | $110.95 | $51K |
| Apr 30, 2026 | Smart Dalton E. III | SVP Fin. - Global Controller | Tax withholding(F) | 159 | $110.95 | $18K |
| Apr 30, 2026 | Smart Dalton E. III | SVP Fin. - Global Controller | Option exercise(M) | 464 | — | $0 |
| Apr 29, 2026 | Chattopadhyay Sanat | Exe V-P & Pres. MMD | Option exercise(M) | 3K | $110.03 | $286K |
| Apr 29, 2026 | Chattopadhyay Sanat | Exe V-P & Pres. MMD | Tax withholding(F) | 1K | $110.03 | $124K |
| Apr 29, 2026 | Chattopadhyay Sanat | Exe V-P & Pres. MMD | Option exercise(M) | 3K | — | $0 |
| Apr 29, 2026 | DeLuca Richard R. | EVP&Pres, Merck Animal Heallth | Option exercise(M) | 3K | $110.03 | $277K |
| Apr 29, 2026 | DeLuca Richard R. | EVP&Pres, Merck Animal Heallth | Tax withholding(F) | 1K | $110.03 | $137K |
| Apr 29, 2026 | DeLuca Richard R. | EVP&Pres, Merck Animal Heallth | Option exercise(M) | 3K | — | $0 |
| Apr 29, 2026 | Davis Robert M | Chairman, CEO & President, Director | Option exercise(M) | 13K | $110.03 | $1.5M |
| Apr 29, 2026 | Davis Robert M | Chairman, CEO & President, Director | Tax withholding(F) | 7K | $110.03 | $721K |
| Apr 29, 2026 | Davis Robert M | Chairman, CEO & President, Director | Option exercise(M) | 13K | — | $0 |
| Apr 29, 2026 | Guindo Chirfi | EVP, Access, Policy & Comms | Option exercise(M) | 2K | $110.03 | $216K |
| Apr 29, 2026 | Guindo Chirfi | EVP, Access, Policy & Comms | Tax withholding(F) | 969 | $110.03 | $107K |
| Apr 29, 2026 | Guindo Chirfi | EVP, Access, Policy & Comms | Option exercise(M) | 2K | — | $0 |
| Apr 29, 2026 | Larson Betty D | EVP, Chief HR Officer | Option exercise(M) | 2K | $110.03 | $229K |
| Apr 29, 2026 | Larson Betty D | EVP, Chief HR Officer | Tax withholding(F) | 715 | $110.03 | $79K |
| Apr 29, 2026 | Larson Betty D | EVP, Chief HR Officer | Option exercise(M) | 2K | — | $0 |
Insider transactions sourced from SEC EDGAR Form 4 filings, normalized within minutes of acceptance. "Buy"/"Sell" mark open-market transactions (codes P/S), the tradeable signal. Awards, option exercises and tax-withholding are shown with their raw code. All data is public domain.
Coverage: Form 4 filings indexed 2006-01-02 → 2026-09-03. Earlier history is backfilling; this window widens as it deepens.
Programmatic access via the Arkolith API & MCP server (insider.transactions, insider.company).
Connected pages for MRK