Company / CIK 0000310158
Merck & Co., Inc.
- Ticker
- MRK
- Size, estimated from filings
- Mega cap ($200B and up)
- Insiders on file
- 27
- Members of Congress who traded it
- 7
- Federal contracts on record
- none matched
- Lobbying filings on record
- 37
- SEC filings
- EDGAR ↗
- Latest trade on record
- September 30, 2026
Merck & Co., Inc. (MRK) has 27 insiders on file who disclosed 170 transactions in the last 12 months (0 open-market buys, 50 sales, about $128.8M at reported prices), and 11 congressional trades in its stock are on record. No federal contract award that started in the last 180 days was found for a recipient with exactly this name, and 18 lobbying filings naming it as client report $7.2M in 2026.
Merck & Co., Inc. in charts
Who is trading this stock
Which people account for the buying and selling over the last 12 months?
BoughtSold
8 people account for the disclosed buying and selling in Merck & Co., Inc. over the last 12 months; the most active is Zachary Jennifer with $25M.
Lobbying spend by quarter
How much has Merck & Co., Inc. reported spending on federal lobbying?
Merck & Co., Inc. reported $16M in lobbying over the last eight quarters, from filings matched by exact company name.
Insiders
| Name | Role | Rows | Bought | Sold | Last filed |
|---|---|---|---|---|---|
| Craig Pamela J. | Director | 1 | 0 | 0 | October 13, 2026 |
| RUSSO PATRICIA F | Director | 1 | 0 | 0 | October 2, 2026 |
| Seidman Christine E | Director | 6 | 0 | 0 | October 1, 2026 |
| Karsanbhai Surendralal Lanca | Director | 3 | 0 | 0 | October 1, 2026 |
| Coe Mary Ellen | Director | 6 | 0 | 0 | October 1, 2026 |
| Warden Kathy J | Chair, CEO and President | 1 | 0 | 0 | August 21, 2026 |
| Guindo Chirfi | EVP, Access, Policy & Comms | 11 | 0 | 6 | August 13, 2026 |
| Zachary Jennifer | EVP, General Counsel | 20 | 0 | 5 | August 13, 2026 |
| DeLuca Richard R. | EVP&Pres, Merck Animal Heallth | 15 | 0 | 10 | August 12, 2026 |
| Maraldo David R. | EVP & Pres. MMD | 14 | 0 | 4 | August 7, 2026 |
| Williams David Michael | EVP,Chief Info&Digital Officer | 19 | 0 | 6 | August 7, 2026 |
| GLOCER THOMAS H | Director | 4 | 0 | 0 | June 2, 2026 |
| BAKER DOUGLAS M JR | Director | 1 | 0 | 0 | June 2, 2026 |
| LAVIZZO-MOUREY RISA J | Director | 1 | 0 | 0 | June 2, 2026 |
| Mayo Stephen | Director | 1 | 0 | 0 | June 2, 2026 |
| Rothman Paul | Director | 1 | 0 | 0 | June 2, 2026 |
| THULIN INGE G | Director | 1 | 0 | 0 | June 2, 2026 |
| Davis Robert M | Chairman, CEO & President | 8 | 0 | 3 | May 11, 2026 |
| Li Dean Y | Executive VP & President, MRL | 10 | 0 | 3 | May 7, 2026 |
| Litchfield Caroline | EVP & CFO | 9 | 0 | 2 | May 7, 2026 |
| Oosthuizen Johannes Jacobus | President, U.S. Market | 7 | 0 | 2 | May 7, 2026 |
| Smart Dalton E. III | SVP Fin. - Global Controller | 16 | 0 | 5 | May 7, 2026 |
| Larson Betty D | EVP, Chief HR Officer | 8 | 0 | 2 | May 7, 2026 |
| Foard Brian | EVP, Specialty, Pharma, & ID | 3 | 0 | 0 | May 7, 2026 |
| Chattopadhyay Sanat | Exe V-P & Pres. MMD | 4 | 0 | 1 | May 1, 2026 |
| Romanelli Joseph | Director | 1 | 0 | 0 | January 28, 2026 |
| Downing Cristal N | Chief Comm. & Public Afrs Ofcr | 1 | 0 | 1 | November 12, 2025 |
Rows are this company's Form 4 rows for each person. "Bought" and "sold" count open-market purchases (code P) and sales only. More in insider buying and insider selling.
Members of Congress who traded MRK
From periodic transaction reports that name the company's stock. Amounts are the sums of the ranges as filed. Every row is on the MRK page.
| Member | Seat | Trades | Bought | Sold | Range as filed | Latest |
|---|---|---|---|---|---|---|
| Maria Elvira Salazar | Representative (FL, District 27), Republican | 3 | 2 | 1 | $31K–$115K | September 24, 2026 |
| Gilbert Ray Cisneros, Jr. | Representative (CA, District 31), Democrat | 2 | 2 | 0 | $2,002–$30K | December 19, 2025 |
| Julie Johnson | Representative (TX, District 32), Democrat | 2 | 0 | 2 | $2,002–$30K | December 18, 2025 |
| Alan Armstrong | Senator (OK), Republican | 1 | 0 | 1 | $15K–$50K | March 27, 2026 |
| Josh Gottheimer | Representative (NJ, District 5), Democrat | 1 | 1 | 0 | $1,001–$15K | February 4, 2026 |
| Val T. Hoyle | Representative (OR, District 4), Democrat | 1 | 0 | 1 | $1,001–$15K | September 23, 2025 |
| Sheri Biggs | Representative (SC, District 3), Republican | 1 | 0 | 1 | $15K–$50K | March 19, 2025 |
Insider transactions
| Filer | Security | Side | Trade date | Disclosed | Lag | Shares | Price | Value | Flags | Source | Share |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Coe Mary Ellen | MRK | Other A | September 30, 2026 | October 1, 2026 | 1d | 206 | $145 | $30K | derivative | Form 4 ↗ | |
| Karsanbhai Surendralal Lanca | MRK | Other A | September 30, 2026 | October 1, 2026 | 1d | 112 | $145 | $16K | derivative | Form 4 ↗ | |
| Seidman Christine E | MRK | Other A | September 30, 2026 | October 1, 2026 | 1d | 56 | $145 | $8,125 | derivative | Form 4 ↗ | |
| 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 ↗ | |
| Warden Kathy J | MRK | Other A | May 29, 2026 | June 2, 2026 | 4d | 1,853 | $119 | $220K | derivative | Form 4 ↗ | |
| Karsanbhai Surendralal Lanca | MRK | Other A | May 29, 2026 | June 2, 2026 | 4d | 1,853 | $119 | $220K | derivative | Form 4 ↗ | |
| Coe Mary Ellen | MRK | Other A | May 29, 2026 | June 2, 2026 | 4d | 1,853 | $119 | $220K | derivative | Form 4 ↗ | |
| THULIN INGE G | MRK | Other A | May 29, 2026 | June 2, 2026 | 4d | 1,853 | $119 | $220K | derivative | Form 4 ↗ | |
| Seidman Christine E | MRK | Other A | May 29, 2026 | June 2, 2026 | 4d | 1,853 | $119 | $220K | derivative | Form 4 ↗ | |
| RUSSO PATRICIA F | MRK | Other A | May 29, 2026 | June 2, 2026 | 4d | 1,853 | $119 | $220K | derivative | Form 4 ↗ | |
| Rothman Paul | MRK | Other A | May 29, 2026 | June 2, 2026 | 4d | 1,853 | $119 | $220K | derivative | Form 4 ↗ | |
| Mayo Stephen | MRK | Other A | May 29, 2026 | June 2, 2026 | 4d | 1,853 | $119 | $220K | derivative | Form 4 ↗ | |
| LAVIZZO-MOUREY RISA J | MRK | Other A | May 29, 2026 | June 2, 2026 | 4d | 1,853 | $119 | $220K | derivative | Form 4 ↗ | |
| GLOCER THOMAS H | MRK | Other A | May 29, 2026 | June 2, 2026 | 4d | 1,853 | $119 | $220K | derivative | Form 4 ↗ | |
| Craig Pamela J. | MRK | Other A | May 29, 2026 | June 2, 2026 | 4d | 1,853 | $119 | $220K | derivative | Form 4 ↗ | |
| BAKER DOUGLAS M JR | MRK | Other A | May 29, 2026 | June 2, 2026 | 4d | 1,853 | $119 | $220K | derivative | Form 4 ↗ | |
| Zachary Jennifer | MRK | Other A | May 5, 2026 | May 7, 2026 | 2d | 35,312 | — | — | derivative | Form 4 ↗ | |
| Zachary Jennifer | MRK | Other A | May 5, 2026 | May 7, 2026 | 2d | 12,064 | — | — | derivative | Form 4 ↗ | |
| Williams David Michael | MRK | Other A | May 5, 2026 | May 7, 2026 | 2d | 13,582 | — | — | derivative | Form 4 ↗ | |
| Williams David Michael | MRK | Other A | May 5, 2026 | May 7, 2026 | 2d | 4,640 | — | — | derivative | Form 4 ↗ | |
| Litchfield Caroline | MRK | Other A | May 5, 2026 | May 7, 2026 | 2d | 46,566 | — | — | derivative | Form 4 ↗ | |
| Litchfield Caroline | MRK | Other A | May 5, 2026 | May 7, 2026 | 2d | 15,908 | — | — | derivative | Form 4 ↗ | |
| Li Dean Y | MRK | Other A | May 5, 2026 | May 7, 2026 | 2d | 58,207 | — | — | derivative | Form 4 ↗ | |
| Li Dean Y | MRK | Other A | May 5, 2026 | May 7, 2026 | 2d | 19,885 | — | — | derivative | Form 4 ↗ | |
| Larson Betty D | MRK | Other A | May 5, 2026 | May 7, 2026 | 2d | 23,283 | — | — | derivative | Form 4 ↗ | |
| Larson Betty D | MRK | Other A | May 5, 2026 | May 7, 2026 | 2d | 7,954 | — | — | derivative | Form 4 ↗ | |
| DeLuca Richard R. | MRK | Other A | May 5, 2026 | May 7, 2026 | 2d | 34,924 | — | — | derivative | Form 4 ↗ | |
| DeLuca Richard R. | MRK | Other A | May 5, 2026 | May 7, 2026 | 2d | 11,931 | — | — | derivative | Form 4 ↗ | |
| Davis Robert M | MRK | Other A | May 5, 2026 | May 7, 2026 | 2d | 139,697 | — | — | derivative | Form 4 ↗ | |
| Davis Robert M | MRK | Other A | May 5, 2026 | May 7, 2026 | 2d | 47,724 | — | — | derivative | Form 4 ↗ | |
| Foard Brian | MRK | Other A | May 5, 2026 | May 7, 2026 | 2d | 31,044 | — | — | derivative | Form 4 ↗ | |
| Foard Brian | MRK | Other A | May 5, 2026 | May 7, 2026 | 2d | 35,351 | — | — | derivative | Form 4 ↗ | |
| Foard Brian | MRK | Other A | May 5, 2026 | May 7, 2026 | 2d | 10,605 | — | — | derivative | Form 4 ↗ | |
| Maraldo David R. | MRK | Other A | May 5, 2026 | May 7, 2026 | 2d | 21,731 | — | — | derivative | Form 4 ↗ | |
| Maraldo David R. | MRK | Other A | May 5, 2026 | May 7, 2026 | 2d | 7,424 | — | — | derivative | Form 4 ↗ | |
| Oosthuizen Johannes Jacobus | MRK | Other A | May 5, 2026 | May 7, 2026 | 2d | 31,044 | — | — | derivative | Form 4 ↗ | |
| Oosthuizen Johannes Jacobus | MRK | Other A | May 5, 2026 | May 7, 2026 | 2d | 10,605 | — | — | derivative | Form 4 ↗ | |
| Smart Dalton E. III | MRK | Other A | May 5, 2026 | May 7, 2026 | 2d | 5,045 | — | — | derivative | Form 4 ↗ | |
| Smart Dalton E. III | MRK | Other A | May 5, 2026 | May 7, 2026 | 2d | 2,298 | — | — | derivative | Form 4 ↗ | |
| Guindo Chirfi | MRK | Other A | May 5, 2026 | May 7, 2026 | 2d | 19,402 | — | — | derivative | Form 4 ↗ | |
| Guindo Chirfi | MRK | Other A | May 5, 2026 | May 7, 2026 | 2d | 6,628 | — | — | derivative | Form 4 ↗ | |
| Smart Dalton E. III | MRK | Option / conversion M | May 2, 2026 | May 5, 2026 | 3d | 383 | — | — | derivative | Form 4 ↗ | |
| Smart Dalton E. III | MRK | Sell F | May 2, 2026 | May 5, 2026 | 3d | 132 | $112 | $15K | Form 4 ↗ | ||
| Smart Dalton E. III | MRK | Option / conversion M | May 2, 2026 | May 5, 2026 | 3d | 383 | $112 | $43K | Form 4 ↗ | ||
| Maraldo David R. | MRK | Option / conversion M | May 2, 2026 | May 5, 2026 | 3d | 552 | — | — | derivative | Form 4 ↗ | |
| Maraldo David R. | MRK | Sell F | May 2, 2026 | May 5, 2026 | 3d | 159 | $112 | $18K | Form 4 ↗ | ||
| Maraldo David R. | MRK | Option / conversion M | May 2, 2026 | May 5, 2026 | 3d | 552 | $112 | $62K | Form 4 ↗ | ||
| Guindo Chirfi | MRK | Option / conversion M | April 29, 2026 | May 1, 2026 | 2d | 1,967 | — | — | derivative | Form 4 ↗ | |
| Guindo Chirfi | MRK | Sell F | April 29, 2026 | May 1, 2026 | 2d | 969 | $110 | $107K | Form 4 ↗ | ||
| Guindo Chirfi | MRK | Option / conversion M | April 29, 2026 | May 1, 2026 | 2d | 1,967 | $110 | $216K | Form 4 ↗ | ||
| Chattopadhyay Sanat | MRK | Option / conversion M | April 29, 2026 | May 1, 2026 | 2d | 2,597 | — | — | derivative | Form 4 ↗ | |
| Chattopadhyay Sanat | MRK | Sell F | April 29, 2026 | May 1, 2026 | 2d | 1,130 | $110 | $124K | Form 4 ↗ | ||
| Chattopadhyay Sanat | MRK | Option / conversion M | April 29, 2026 | May 1, 2026 | 2d | 2,597 | $110 | $286K | Form 4 ↗ | ||
| DeLuca Richard R. | MRK | Option / conversion M | April 29, 2026 | May 1, 2026 | 2d | 2,518 | — | — | derivative | Form 4 ↗ | |
| DeLuca Richard R. | MRK | Sell F | April 29, 2026 | May 1, 2026 | 2d | 1,241 | $110 | $137K | Form 4 ↗ | ||
| DeLuca Richard R. | MRK | Option / conversion M | April 29, 2026 | May 1, 2026 | 2d | 2,518 | $110 | $277K | Form 4 ↗ | ||
| Williams David Michael | MRK | Option / conversion M | April 29, 2026 | May 1, 2026 | 2d | 1,377 | — | — | derivative | Form 4 ↗ | |
| Williams David Michael | MRK | Sell F | April 29, 2026 | May 1, 2026 | 2d | 679 | $110 | $75K | Form 4 ↗ | ||
| Williams David Michael | MRK | Option / conversion M | April 29, 2026 | May 1, 2026 | 2d | 1,377 | $110 | $152K | Form 4 ↗ | ||
| Smart Dalton E. III | MRK | Option / conversion M | April 30, 2026 | May 1, 2026 | 1d | 464 | — | — | derivative | Form 4 ↗ | |
| Smart Dalton E. III | MRK | Option / conversion M | April 29, 2026 | May 1, 2026 | 2d | 944 | — | — | derivative | Form 4 ↗ | |
| Smart Dalton E. III | MRK | Sell F | April 30, 2026 | May 1, 2026 | 1d | 159 | $111 | $18K | Form 4 ↗ | ||
| Smart Dalton E. III | MRK | Option / conversion M | April 30, 2026 | May 1, 2026 | 1d | 464 | $111 | $51K | Form 4 ↗ | ||
| Smart Dalton E. III | MRK | Sell F | April 29, 2026 | May 1, 2026 | 2d | 324 | $110 | $36K | Form 4 ↗ | ||
| Smart Dalton E. III | MRK | Option / conversion M | April 29, 2026 | May 1, 2026 | 2d | 944 | $110 | $104K | Form 4 ↗ | ||
| Li Dean Y | MRK | Option / conversion M | April 29, 2026 | May 1, 2026 | 2d | 4,722 | — | — | derivative | Form 4 ↗ | |
| Li Dean Y | MRK | Sell F | April 29, 2026 | May 1, 2026 | 2d | 2,326 | $110 | $256K | Form 4 ↗ | ||
| Li Dean Y | MRK | Option / conversion M | April 29, 2026 | May 1, 2026 | 2d | 4,722 | $110 | $520K | Form 4 ↗ | ||
| Zachary Jennifer | MRK | Option / conversion M | April 29, 2026 | May 1, 2026 | 2d | 2,951 | — | — | derivative | Form 4 ↗ | |
| Zachary Jennifer | MRK | Sell F | April 29, 2026 | May 1, 2026 | 2d | 1,454 | $110 | $160K | Form 4 ↗ | ||
| Zachary Jennifer | MRK | Option / conversion M | April 29, 2026 | May 1, 2026 | 2d | 2,951 | $110 | $325K | Form 4 ↗ | ||
| Larson Betty D | MRK | Option / conversion M | April 30, 2026 | May 1, 2026 | 1d | 11,350 | — | — | derivative | Form 4 ↗ | |
| Larson Betty D | MRK | Option / conversion M | April 29, 2026 | May 1, 2026 | 2d | 2,085 | — | — | derivative | Form 4 ↗ | |
| Larson Betty D | MRK | Sell F | April 30, 2026 | May 1, 2026 | 1d | 5,143 | $111 | $571K | Form 4 ↗ | ||
| Larson Betty D | MRK | Option / conversion M | April 30, 2026 | May 1, 2026 | 1d | 11,350 | $111 | $1.3M | Form 4 ↗ | ||
| Larson Betty D | MRK | Sell F | April 29, 2026 | May 1, 2026 | 2d | 715 | $110 | $79K | Form 4 ↗ | ||
| Larson Betty D | MRK | Option / conversion M | April 29, 2026 | May 1, 2026 | 2d | 2,085 | $110 | $229K | Form 4 ↗ | ||
| Litchfield Caroline | MRK | Option / conversion M | April 29, 2026 | May 1, 2026 | 2d | 3,935 | — | — | derivative | Form 4 ↗ | |
| Litchfield Caroline | MRK | Sell F | April 29, 2026 | May 1, 2026 | 2d | 1,938 | $110 | $213K | Form 4 ↗ | ||
| Litchfield Caroline | MRK | Option / conversion M | April 29, 2026 | May 1, 2026 | 2d | 3,935 | $110 | $433K | Form 4 ↗ | ||
| Davis Robert M | MRK | Option / conversion M | April 29, 2026 | May 1, 2026 | 2d | 13,300 | — | — | derivative | Form 4 ↗ | |
| Davis Robert M | MRK | Sell F | April 29, 2026 | May 1, 2026 | 2d | 6,551 | $110 | $721K | Form 4 ↗ | ||
| Davis Robert M | MRK | Option / conversion M | April 29, 2026 | May 1, 2026 | 2d | 13,300 | $110 | $1.5M | Form 4 ↗ | ||
| Oosthuizen Johannes Jacobus | MRK | Option / conversion M | April 29, 2026 | May 1, 2026 | 2d | 1,377 | — | — | derivative | Form 4 ↗ | |
| Oosthuizen Johannes Jacobus | MRK | Sell F | April 29, 2026 | May 1, 2026 | 2d | 679 | $110 | $75K | Form 4 ↗ | ||
| Oosthuizen Johannes Jacobus | MRK | Option / conversion M | April 29, 2026 | May 1, 2026 | 2d | 1,377 | $110 | $152K | Form 4 ↗ | ||
| Seidman Christine E | MRK | Other A | March 31, 2026 | April 1, 2026 | 1d | 68 | $120 | $8,125 | derivative | Form 4 ↗ | |
| GLOCER THOMAS H | MRK | Other A | March 31, 2026 | April 1, 2026 | 1d | 405 | $120 | $49K | derivative | Form 4 ↗ | |
| Coe Mary Ellen | MRK | Other A | March 31, 2026 | April 1, 2026 | 1d | 249 | $120 | $30K | derivative | Form 4 ↗ | |
| Guindo Chirfi | MRK | Sell S | February 12, 2026 | February 12, 2026 | 0d | 10,000 | $121 | $1.2M | Form 4 ↗ | ||
| Li Dean Y | MRK | Sell S | February 10, 2026 | February 10, 2026 | 0d | 10,235 | $118 | $1.2M | Form 4 ↗ | ||
| Guindo Chirfi | MRK | Sell S | February 9, 2026 | February 9, 2026 | 0d | 10,000 | $118 | $1.2M | Form 4 ↗ | ||
| Zachary Jennifer | MRK | Option / conversion M | February 9, 2026 | February 9, 2026 | 0d | 38,835 | — | — | derivative | Form 4 ↗ | |
| Zachary Jennifer | MRK | Option / conversion M | February 9, 2026 | February 9, 2026 | 0d | 56,792 | — | — | derivative | Form 4 ↗ | |
| Zachary Jennifer | MRK | Option / conversion M | February 9, 2026 | February 9, 2026 | 0d | 25,946 | — | — | derivative | Form 4 ↗ | |
| Zachary Jennifer | MRK | Sell S | February 9, 2026 | February 9, 2026 | 0d | 38,835 | $119 | $4.6M | Form 4 ↗ | ||
| Zachary Jennifer | MRK | Option / conversion M | February 9, 2026 | February 9, 2026 | 0d | 38,835 | $119 | $4.6M | Form 4 ↗ | ||
| Zachary Jennifer | MRK | Sell S | February 9, 2026 | February 9, 2026 | 0d | 56,792 | $119 | $6.8M | Form 4 ↗ | ||
| Zachary Jennifer | MRK | Option / conversion M | February 9, 2026 | February 9, 2026 | 0d | 56,792 | $119 | $6.8M | Form 4 ↗ | ||
| Zachary Jennifer | MRK | Sell S | February 9, 2026 | February 9, 2026 | 0d | 25,946 | $119 | $3.1M | Form 4 ↗ | ||
| Zachary Jennifer | MRK | Option / conversion M | February 9, 2026 | February 9, 2026 | 0d | 25,946 | $119 | $3.1M | Form 4 ↗ | ||
| Williams David Michael | MRK | Option / conversion M | February 6, 2026 | February 6, 2026 | 0d | 5,000 | — | — | derivative | Form 4 ↗ | |
| Williams David Michael | MRK | Sell S | February 6, 2026 | February 6, 2026 | 0d | 5,000 | $122 | $610K | Form 4 ↗ | ||
| Williams David Michael | MRK | Option / conversion M | February 6, 2026 | February 6, 2026 | 0d | 5,000 | $78 | $388K | Form 4 ↗ | ||
| Smart Dalton E. III | MRK | Option / conversion M | February 4, 2026 | February 6, 2026 | 2d | 4,000 | — | — | derivative | Form 4 ↗ | |
| Smart Dalton E. III | MRK | Sell S | February 4, 2026 | February 6, 2026 | 2d | 2,400 | $120 | $287K | Form 4 ↗ | ||
| Smart Dalton E. III | MRK | Sell S | February 4, 2026 | February 6, 2026 | 2d | 4,000 | $120 | $479K | Form 4 ↗ | ||
| Smart Dalton E. III | MRK | Option / conversion M | February 4, 2026 | February 6, 2026 | 2d | 4,000 | $62 | $248K | Form 4 ↗ | ||
| Oosthuizen Johannes Jacobus | MRK | Sell S | February 6, 2026 | February 6, 2026 | 0d | 15,000 | $122 | $1.8M | Form 4 ↗ | ||
| Litchfield Caroline | MRK | Option / conversion M | February 4, 2026 | February 6, 2026 | 2d | 41,997 | — | — | derivative | Form 4 ↗ | |
| Litchfield Caroline | MRK | Sell S | February 4, 2026 | February 6, 2026 | 2d | 41,997 | $120 | $5.0M | Form 4 ↗ | ||
| Litchfield Caroline | MRK | Option / conversion M | February 4, 2026 | February 6, 2026 | 2d | 41,997 | $53 | $2.2M | Form 4 ↗ | ||
| Li Dean Y | MRK | Option / conversion M | February 4, 2026 | February 6, 2026 | 2d | 15,087 | — | — | derivative | Form 4 ↗ | |
| Li Dean Y | MRK | Sell S | February 4, 2026 | February 6, 2026 | 2d | 15,087 | $119 | $1.8M | Form 4 ↗ | ||
| Li Dean Y | MRK | Option / conversion M | February 4, 2026 | February 6, 2026 | 2d | 15,087 | $56 | $845K | Form 4 ↗ | ||
| Guindo Chirfi | MRK | Sell S | February 5, 2026 | February 6, 2026 | 1d | 20,000 | $122 | $2.4M | Form 4 ↗ | ||
| DeLuca Richard R. | MRK | Sell S | February 6, 2026 | February 6, 2026 | 0d | 37,685 | $121 | $4.6M | Form 4 ↗ | ||
| Davis Robert M | MRK | Sell S | February 4, 2026 | February 6, 2026 | 2d | 32,462 | $118 | $3.8M | Form 4 ↗ | ||
| Davis Robert M | MRK | Sell S | February 4, 2026 | February 6, 2026 | 2d | 14,972 | $117 | $1.8M | Form 4 ↗ | ||
| Zachary Jennifer | MRK | Other A | January 26, 2026 | January 28, 2026 | 2d | 11,583 | $107 | $1.2M | Form 4 ↗ | ||
| Williams David Michael | MRK | Other A | January 26, 2026 | January 28, 2026 | 2d | 6,112 | $107 | $656K | Form 4 ↗ | ||
| Smart Dalton E. III | MRK | Other A | January 26, 2026 | January 28, 2026 | 2d | 1,066 | $107 | $114K | Form 4 ↗ | ||
| Romanelli Joseph | MRK | Other A | January 26, 2026 | January 28, 2026 | 2d | 5,703 | $107 | $613K | Form 4 ↗ | ||
| Oosthuizen Johannes Jacobus | MRK | Other A | January 26, 2026 | January 28, 2026 | 2d | 5,026 | $107 | $540K | Form 4 ↗ | ||
| Litchfield Caroline | MRK | Other A | January 26, 2026 | January 28, 2026 | 2d | 15,852 | $107 | $1.7M | Form 4 ↗ | ||
| Li Dean Y | MRK | Other A | January 26, 2026 | January 28, 2026 | 2d | 20,469 | $107 | $2.2M | Form 4 ↗ | ||
| Guindo Chirfi | MRK | Other A | January 26, 2026 | January 28, 2026 | 2d | 9,865 | $107 | $1.1M | Form 4 ↗ | ||
| DeLuca Richard R. | MRK | Other A | January 26, 2026 | January 28, 2026 | 2d | 12,264 | $107 | $1.3M | Form 4 ↗ | ||
| Davis Robert M | MRK | Other A | January 26, 2026 | January 28, 2026 | 2d | 47,434 | $107 | $5.1M | Form 4 ↗ | ||
| Chattopadhyay Sanat | MRK | Other A | January 26, 2026 | January 28, 2026 | 2d | 13,880 | $107 | $1.5M | Form 4 ↗ | ||
| Seidman Christine E | MRK | Other A | December 31, 2025 | January 5, 2026 | 5d | 77 | $105 | $8,125 | latederivative | Form 4 ↗ | |
| GLOCER THOMAS H | MRK | Other A | December 31, 2025 | January 5, 2026 | 5d | 463 | $105 | $49K | latederivative | Form 4 ↗ | |
| Coe Mary Ellen | MRK | Other A | December 31, 2025 | January 5, 2026 | 5d | 285 | $105 | $30K | latederivative | Form 4 ↗ | |
| Downing Cristal N | MRK | Sell S | November 10, 2025 | November 12, 2025 | 2d | 7,085 | $87 | $616K | Form 4 ↗ | ||
| Williams David Michael | MRK | Sell S | November 3, 2025 | November 4, 2025 | 1d | 8,614 | $84 | $720K | Form 4 ↗ | ||
| Seidman Christine E | MRK | Other A | September 30, 2025 | October 2, 2025 | 2d | 97 | $84 | $8,125 | derivative | Form 4 ↗ | |
| GLOCER THOMAS H | MRK | Other A | September 30, 2025 | October 2, 2025 | 2d | 581 | $84 | $49K | derivative | Form 4 ↗ | |
| Coe Mary Ellen | MRK | Other A | September 30, 2025 | October 2, 2025 | 2d | 357 | $84 | $30K | derivative | Form 4 ↗ |
Federal contracts (USAspending, awards started in the last 180 days)
No contract award starting in the last 180 days was found for a recipient named exactly "Merck & Co., Inc.". Subsidiaries and differently-spelled recipients are not matched — search contracts.
Lobbying (Senate LDA, as client)
| Period | Registrant | Primary issue | Amount | Source |
|---|---|---|---|---|
| 2026 Q3 | TODD STRATEGY GROUP | Health Issues | $50,000 | LDA ↗ |
| 2026 Q3 | W STRATEGIES, LLC | Medicare/Medicaid | $50,000 | LDA ↗ |
| 2026 Q2 | MERCK & CO, INC. | Health Issues | $2,270,000 | LDA ↗ |
| 2026 Q2 | THE NICKLES GROUP, LLC | Health Issues | $70,000 | LDA ↗ |
| 2026 Q2 | AVENUE SOLUTIONS | Health Issues | $50,000 | LDA ↗ |
| 2026 Q2 | WILLIAMS AND JENSEN, PLLC | Pharmacy | $50,000 | LDA ↗ |
| 2026 Q2 | TIBER CREEK GROUP | Medicare/Medicaid | $50,000 | LDA ↗ |
| 2026 Q2 | TODD STRATEGY GROUP | Health Issues | $50,000 | LDA ↗ |
| 2026 Q2 | W STRATEGIES, LLC | Medicare/Medicaid | $50,000 | LDA ↗ |
| 2026 Q2 | CROSSROADS STRATEGIES, LLC | Trade (domestic/foreign) | $40,000 | LDA ↗ |
| 2026 Q1 | MERCK & CO, INC. | Health Issues | $4,150,000 | LDA ↗ |
| 2026 Q1 | THE NICKLES GROUP, LLC | Health Issues | $70,000 | LDA ↗ |
| 2026 Q1 | TIBER CREEK GROUP | Medicare/Medicaid | $50,000 | LDA ↗ |
| 2026 Q1 | W STRATEGIES, LLC | Medicare/Medicaid | $50,000 | LDA ↗ |
| 2026 Q1 | WILLIAMS AND JENSEN, PLLC | Health Issues | $50,000 | LDA ↗ |
| 2026 Q1 | TODD STRATEGY GROUP | Health Issues | $50,000 | LDA ↗ |
| 2026 Q1 | AVENUE SOLUTIONS | Health Issues | $50,000 | LDA ↗ |
| 2026 Q1 | CROSSROADS STRATEGIES, LLC | Trade (domestic/foreign) | $40,000 | LDA ↗ |
| 2025 Q4 | MERCK & CO, INC. | Health Issues | $1,930,000 | LDA ↗ |
| 2025 Q4 | TIBER CREEK GROUP | Medicare/Medicaid | $50,000 | LDA ↗ |
| 2025 Q4 | W STRATEGIES, LLC | Medicare/Medicaid | $50,000 | LDA ↗ |
| 2025 Q4 | TODD STRATEGY GROUP | Health Issues | $50,000 | LDA ↗ |
| 2025 Q4 | WILLIAMS AND JENSEN, PLLC | Pharmacy | $50,000 | LDA ↗ |
| 2025 Q4 | THE NICKLES GROUP, LLC | Health Issues | $50,000 | LDA ↗ |
| 2025 Q4 | HARBINGER STRATEGIES, LLC | Taxation/Internal Revenue Code | $50,000 | LDA ↗ |
| 2025 Q4 | AVENUE SOLUTIONS | Health Issues | $50,000 | LDA ↗ |
| 2025 Q4 | CROSSROADS STRATEGIES, LLC | Copyright/Patent/Trademark | $40,000 | LDA ↗ |
| 2025 Q3 | MERCK & CO, INC. | Health Issues | $1,520,000 | LDA ↗ |
| 2025 Q3 | AVENUE SOLUTIONS | Health Issues | $50,000 | LDA ↗ |
| 2025 Q3 | TODD STRATEGY GROUP | Health Issues | $50,000 | LDA ↗ |
| 2025 Q3 | WILLIAMS AND JENSEN, PLLC | Health Issues | $50,000 | LDA ↗ |
| 2025 Q3 | TIBER CREEK GROUP | Medicare/Medicaid | $50,000 | LDA ↗ |
| 2025 Q3 | W STRATEGIES, LLC | Medicare/Medicaid | $50,000 | LDA ↗ |
| 2025 Q3 | HARBINGER STRATEGIES, LLC | Taxation/Internal Revenue Code | $50,000 | LDA ↗ |
| 2025 Q3 | THE NICKLES GROUP, LLC | Health Issues | $50,000 | LDA ↗ |
| 2025 Q3 | CROSSROADS STRATEGIES, LLC | Trade (domestic/foreign) | $40,000 | LDA ↗ |
| 2025 Q2 | MERCK & CO, INC. | Health Issues | $4,990,000 | LDA ↗ |
Related companies
Companies whose stock was traded by the same people who traded MRK, by number of filers in common. It shows overlap in public filings and nothing else.
- MICROSOFT CORP MSFT 7 filers in common
- PROGRESSIVE CORP/OH/ PGR 6 filers in common
- UNITEDHEALTH GROUP INC UNH 6 filers in common
- BERKSHIRE HATHAWAY INC BRK.B 6 filers in common
- CHEVRON CORP CVX 5 filers in common
- SCHWAB CHARLES CORP SCHW 5 filers in common
- INTERNATIONAL BUSINESS MACHINES CORP IBM 5 filers in common
- CISCO SYSTEMS, INC. CSCO 5 filers in common
Guides for this page
- What is SEC Form 4? Who files: officers, directors and owners of more than 10% of a class of the company's shares.
- Insider buying vs insider selling Selling outweighs buying by a wide margin in normal times.
- Lobbying disclosure reports Reports are due about 20 days after each quarter ends.
- What disclosure data cannot tell you Filings are late by design: up to 45 days for Congress, two business days for insiders.
Sources and method
| Source | Filings | Rows | First filed | Newest filed | Read the originals |
|---|---|---|---|---|---|
| House Clerk, periodic transaction reports | 9 | 10 | October 5, 2025 | October 7, 2026 | House Clerk search |
| Senate eFD, periodic transaction reports | 1 | 1 | July 21, 2026 | July 21, 2026 | Senate eFD search |
| SEC EDGAR, Form 4 | 84 | 173 | October 2, 2025 | October 1, 2026 | Form 4 list on EDGAR |
| Lobbying disclosure filings | 37 filings | — | — | — | LDA.gov search |
Site built October 27, 2026. Every row in the tables above links to its own filing. To quote a figure, use the Cite button at the top of the page; see how to cite and reuse.
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.