Updated Jul 16, 2026 · Last SEC filing 2026-07-01
Merck & Co., Inc. (MRK) has filed 40 SEC Form 4 insider transactions in the last 90 days, with the most recent on 2026-07-01. 3 Form 8-K material event filings were reported by MRK in the last 90 days. InsiderAlpha tracks every MRK SEC filing — Form 4, Form 144, and 8-K — in real time, including Rule 10b5-1 plan detection.
| SIC classification | Pharmaceutical Preparations (SIC 2834) |
|---|---|
| SEC CIK | 0000310158 |
| Form 4 filings (90d) | 40 |
|---|---|
| Form 8-K filings (90d) | 3 |
| Latest Form 4 filing | 2026-07-01 |
| Date | Insider | Role | Transaction | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| Smart Dalton E. III | SVP Fin. - Global Controller | F — Tax withholding / forfeiture | 132 | $112.16 | $15K | SEC | |
| Smart Dalton E. III | SVP Fin. - Global Controller | M — Option exercise | 383 | $112.16 | $43K | SEC | |
| Maraldo David R. | EVP & Pres. MMD | F — Tax withholding / forfeiture | 159 | $112.16 | $18K | SEC | |
| Maraldo David R. | EVP & Pres. MMD | M — Option exercise | 552 | $112.16 | $62K | SEC | |
| Smart Dalton E. III | SVP Fin. - Global Controller | F — Tax withholding / forfeiture | 159 | $110.95 | $18K | SEC | |
| Smart Dalton E. III | SVP Fin. - Global Controller | M — Option exercise | 464 | $110.95 | $51K | SEC | |
| Larson Betty D | EVP, Chief HR Officer | F — Tax withholding / forfeiture | 5.1K | $110.95 | $571K | SEC | |
| Larson Betty D | EVP, Chief HR Officer | M — Option exercise | 11.3K | $110.95 | $1.26M | SEC | |
| Li Dean Y | Executive VP & President, MRL | M — Option exercise | 4.7K | $110.03 | $520K | SEC | |
| DeLuca Richard R. | EVP&Pres, Merck Animal Heallth | M — Option exercise | 2.5K | $110.03 | $277K | SEC | |
| Smart Dalton E. III | SVP Fin. - Global Controller | F — Tax withholding / forfeiture | 324 | $110.03 | $36K | SEC | |
| Smart Dalton E. III | SVP Fin. - Global Controller | M — Option exercise | 944 | $110.03 | $104K | SEC | |
| Guindo Chirfi | EVP, Access, Policy & Comms | M — Option exercise | 2.0K | $110.03 | $216K | SEC | |
| Li Dean Y | Executive VP & President, MRL | F — Tax withholding / forfeiture | 2.3K | $110.03 | $256K | SEC | |
| Williams David Michael | EVP,Chief Info&Digital Officer | M — Option exercise | 1.4K | $110.03 | $152K | SEC |
All transactions sourced from SEC EDGAR Form 4 filings for Merck & Co., Inc. (MRK). Updated in real time as new filings are submitted to the SEC.
| Insider | Form 4 filings | Total transaction value |
|---|---|---|
| Smart Dalton E. III | 11 | $266K |
| Larson Betty D | 8 | $2.14M |
| Williams David Michael | 5 | $226K |
| Guindo Chirfi | 5 | $323K |
| Li Dean Y | 5 | $775K |
SEC Form 4 transactions are reported with a one-letter code indicating the type of transaction. Common codes you'll see in MRK insider filings:
| P | Open-market purchase by the insider |
|---|---|
| S | Open-market sale by the insider |
| A | Grant, award, or other acquisition from the issuer |
| M | Exercise or conversion of derivative security (e.g. options) |
| F | Payment of exercise price or tax liability via share withholding |
| G | Bona-fide gift of securities |
| D | Disposition to the issuer (e.g. share buyback participation) |
| J | Other acquisition or disposition |
| X | Exercise of in-the-money or at-the-money derivative security |
| C | Conversion of derivative security |
| V | Transaction voluntarily reported earlier than required |
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