Insider txns (12m)
170
Stock / equity
MRK Merck & Co., Inc.
- Company
- Merck & Co., Inc.
- Security
- Equity
- Size, estimated from filings
- Mega cap ($200B and up)
- Insiders on record
- 27
- Members of Congress
- 7
- Latest trade on record
- September 30, 2026
MRK (Merck & Co., Inc.) has 170 disclosed insider transactions from 27 insiders in the last 12 months (0 open-market buys, 50 sales, about $128.8M at reported prices) and 9 congressional trades from 5 members of Congress. The most recent disclosure was filed October 7, 2026.
Open-market buys / sales
0 / 50
Congress trades (12m)
9
Distinct filers (12m)
32
Share price
Price and chart by TradingView for Merck & Co., Inc.. US share prices here are delayed, not real-time. The trade records on this page come from government filings, not from this chart.
MRK 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 MRK over the last 12 months; the most active is Zachary Jennifer with $25M.
Prices insiders traded at
What price did insiders buy and sell at? Each marker is one open-market trade at the share price reported on its Form 4.
▲ Bought▼ SoldAverage reported price that day
Insiders reported 35 open-market trades in MRK since Nov 3, 2025, at prices from $83.59 to $135; the most recent was a sale at $135 on Aug 13, 2026. These are the prices on the filings, not adjusted for stock splits, and not a market price series.
Insider holdings over time
Is an insider building or unwinding a position? Shares held directly after each filing.
Guindo ChirfiDeLuca Richard R.
Guindo Chirfi reported 36,613 shares held after the latest filing, against 100,615 at the first on record.
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 trading MRK
Everyone who filed a Form 4 for this ticker, by number of rows on record. "Bought" and "sold" count open-market purchases (code P) and sales only; awards, option exercises and shares withheld for tax are in the row count but not in those two columns. Showing 15 of 27.
| Insider | Role | Rows | Bought | Sold | Value bought | Value sold | Latest |
|---|---|---|---|---|---|---|---|
| Zachary Jennifer | EVP, General Counsel | 20 | 0 | 5 | — | $25.4M | August 12, 2026 |
| Williams David Michael | EVP,Chief Info&Digital Officer | 19 | 0 | 6 | — | $8.2M | August 5, 2026 |
| Smart Dalton E. III | SVP Fin. - Global Controller | 16 | 0 | 5 | — | $834K | May 5, 2026 |
| DeLuca Richard R. | EVP&Pres, Merck Animal Heallth | 15 | 0 | 10 | — | $11.4M | August 12, 2026 |
| Maraldo David R. | EVP & Pres. MMD | 14 | 0 | 4 | — | $2.4M | August 5, 2026 |
| Guindo Chirfi | EVP, Access, Policy & Comms | 11 | 0 | 6 | — | $8.3M | August 13, 2026 |
| Li Dean Y | Executive VP & President, MRL | 10 | 0 | 3 | — | $3.3M | May 5, 2026 |
| Litchfield Caroline | EVP & CFO | 9 | 0 | 2 | — | $5.2M | May 5, 2026 |
| Davis Robert M | Chairman, CEO & President | 8 | 0 | 3 | — | $6.3M | May 5, 2026 |
| Larson Betty D | EVP, Chief HR Officer | 8 | 0 | 2 | — | $649K | May 5, 2026 |
| Oosthuizen Johannes Jacobus | President, U.S. Market | 7 | 0 | 2 | — | $1.9M | May 5, 2026 |
| Coe Mary Ellen | Director | 6 | 0 | 0 | — | — | September 30, 2026 |
| Seidman Christine E | Director | 6 | 0 | 0 | — | — | September 30, 2026 |
| GLOCER THOMAS H | Director | 4 | 0 | 0 | — | — | May 29, 2026 |
| Chattopadhyay Sanat | Exe V-P & Pres. MMD | 4 | 0 | 1 | — | $124K | April 29, 2026 |
What kind of transactions these are 4 Form 4 codes
| Code | Meaning | Rows | Shares | Value at reported prices |
|---|---|---|---|---|
| A | Grant or award | 63 | 827,725 | $19.0M |
| M | Option exercise or conversion | 60 | 729,318 | $35.3M |
| S | Open-market sale | 35 | 584,348 | $72.0M |
| F | Shares withheld for tax | 15 | 23,599 | $2.6M |
What each code means: Form 4 transaction codes.
Members of Congress trading MRK
Members whose periodic transaction reports name this ticker. Amounts are the sums of the ranges as filed.
| 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 | Side | Trade date | Disclosed | Lag | Shares | Price | Value | Flags | Source | Share |
|---|---|---|---|---|---|---|---|---|---|---|
| Coe Mary Ellen | Other A | September 30, 2026 | October 1, 2026 | 1d | 206 | $145 | $30K | derivative | Form 4 ↗ | |
| Karsanbhai Surendralal Lanca | Other A | September 30, 2026 | October 1, 2026 | 1d | 112 | $145 | $16K | derivative | Form 4 ↗ | |
| Seidman Christine E | Other A | September 30, 2026 | October 1, 2026 | 1d | 56 | $145 | $8,125 | derivative | Form 4 ↗ | |
| Zachary Jennifer | Option / conversion M | August 12, 2026 | August 13, 2026 | 1d | 13,433 | — | — | derivative | Form 4 ↗ | |
| Zachary Jennifer | Option / conversion M | August 12, 2026 | August 13, 2026 | 1d | 41,494 | — | — | derivative | Form 4 ↗ | |
| Zachary Jennifer | Sell S | August 12, 2026 | August 13, 2026 | 1d | 80,315 | $133 | $10.7M | Form 4 ↗ | ||
| Zachary Jennifer | Option / conversion M | August 12, 2026 | August 13, 2026 | 1d | 13,433 | $85 | $1.1M | Form 4 ↗ | ||
| Zachary Jennifer | Option / conversion M | August 12, 2026 | August 13, 2026 | 1d | 41,494 | $118 | $4.9M | Form 4 ↗ | ||
| Guindo Chirfi | Sell S | August 13, 2026 | August 13, 2026 | 0d | 10,000 | $135 | $1.4M | Form 4 ↗ | ||
| DeLuca Richard R. | Sell S | August 12, 2026 | August 12, 2026 | 0d | 600 | $132 | $79K | Form 4 ↗ | ||
| DeLuca Richard R. | Sell S | August 12, 2026 | August 12, 2026 | 0d | 11,099 | $132 | $1.5M | Form 4 ↗ | ||
| DeLuca Richard R. | Sell S | August 11, 2026 | August 12, 2026 | 1d | 5,427 | $132 | $718K | Form 4 ↗ | ||
| DeLuca Richard R. | Sell S | August 11, 2026 | August 12, 2026 | 1d | 7,410 | $131 | $973K | Form 4 ↗ | ||
| DeLuca Richard R. | Sell S | August 10, 2026 | August 12, 2026 | 2d | 20,784 | $130 | $2.7M | Form 4 ↗ | ||
| DeLuca Richard R. | Sell S | August 6, 2026 | August 10, 2026 | 4d | 300 | $131 | $39K | Form 4 ↗ | ||
| DeLuca Richard R. | Sell S | August 6, 2026 | August 10, 2026 | 4d | 4,945 | $130 | $644K | Form 4 ↗ | ||
| DeLuca Richard R. | Sell S | August 6, 2026 | August 10, 2026 | 4d | 805 | $131 | $105K | Form 4 ↗ | ||
| Guindo Chirfi | Sell S | August 6, 2026 | August 7, 2026 | 1d | 15,000 | $131 | $2.0M | Form 4 ↗ | ||
| Williams David Michael | Option / conversion M | August 5, 2026 | August 7, 2026 | 2d | 34,705 | — | — | derivative | Form 4 ↗ | |
| Williams David Michael | Option / conversion M | August 5, 2026 | August 7, 2026 | 2d | 13,542 | — | — | derivative | Form 4 ↗ | |
| Williams David Michael | Option / conversion M | August 5, 2026 | August 7, 2026 | 2d | 4,600 | — | — | derivative | Form 4 ↗ | |
| Williams David Michael | Sell S | August 5, 2026 | August 7, 2026 | 2d | 34,705 | $129 | $4.5M | Form 4 ↗ | ||
| Williams David Michael | Option / conversion M | August 5, 2026 | August 7, 2026 | 2d | 34,705 | $74 | $2.6M | Form 4 ↗ | ||
| Williams David Michael | Sell S | August 5, 2026 | August 7, 2026 | 2d | 13,542 | $129 | $1.7M | Form 4 ↗ | ||
| Williams David Michael | Option / conversion M | August 5, 2026 | August 7, 2026 | 2d | 13,542 | $75 | $1.0M | Form 4 ↗ | ||
| Williams David Michael | Sell S | August 5, 2026 | August 7, 2026 | 2d | 4,600 | $129 | $592K | Form 4 ↗ | ||
| Williams David Michael | Option / conversion M | August 5, 2026 | August 7, 2026 | 2d | 4,600 | $78 | $357K | Form 4 ↗ | ||
| Maraldo David R. | Option / conversion M | August 5, 2026 | August 7, 2026 | 2d | 2,686 | — | — | derivative | Form 4 ↗ | |
| Maraldo David R. | Option / conversion M | August 5, 2026 | August 7, 2026 | 2d | 9,709 | — | — | derivative | Form 4 ↗ | |
| Maraldo David R. | Option / conversion M | August 5, 2026 | August 7, 2026 | 2d | 6,311 | — | — | derivative | Form 4 ↗ | |
| Maraldo David R. | Sell S | August 5, 2026 | August 7, 2026 | 2d | 2,686 | $129 | $346K | Form 4 ↗ | ||
| Maraldo David R. | Option / conversion M | August 5, 2026 | August 7, 2026 | 2d | 2,686 | $85 | $228K | Form 4 ↗ | ||
| Maraldo David R. | Sell S | August 5, 2026 | August 7, 2026 | 2d | 9,709 | $129 | $1.2M | Form 4 ↗ | ||
| Maraldo David R. | Option / conversion M | August 5, 2026 | August 7, 2026 | 2d | 9,709 | $87 | $846K | Form 4 ↗ | ||
| Maraldo David R. | Sell S | August 5, 2026 | August 7, 2026 | 2d | 6,311 | $129 | $812K | Form 4 ↗ | ||
| Maraldo David R. | Option / conversion M | August 5, 2026 | August 7, 2026 | 2d | 6,311 | $74 | $465K | Form 4 ↗ | ||
| Coe Mary Ellen | Other A | June 30, 2026 | July 1, 2026 | 1d | 233 | $129 | $30K | derivative | Form 4 ↗ | |
| Karsanbhai Surendralal Lanca | Other A | June 30, 2026 | July 1, 2026 | 1d | 126 | $129 | $16K | derivative | Form 4 ↗ | |
| Seidman Christine E | Other A | June 30, 2026 | July 1, 2026 | 1d | 63 | $129 | $8,125 | derivative | Form 4 ↗ | |
| Warden Kathy J | Other A | May 29, 2026 | June 2, 2026 | 4d | 1,853 | $119 | $220K | derivative | Form 4 ↗ | |
| Karsanbhai Surendralal Lanca | Other A | May 29, 2026 | June 2, 2026 | 4d | 1,853 | $119 | $220K | derivative | Form 4 ↗ | |
| Coe Mary Ellen | Other A | May 29, 2026 | June 2, 2026 | 4d | 1,853 | $119 | $220K | derivative | Form 4 ↗ | |
| THULIN INGE G | Other A | May 29, 2026 | June 2, 2026 | 4d | 1,853 | $119 | $220K | derivative | Form 4 ↗ | |
| Seidman Christine E | Other A | May 29, 2026 | June 2, 2026 | 4d | 1,853 | $119 | $220K | derivative | Form 4 ↗ | |
| RUSSO PATRICIA F | Other A | May 29, 2026 | June 2, 2026 | 4d | 1,853 | $119 | $220K | derivative | Form 4 ↗ | |
| Rothman Paul | Other A | May 29, 2026 | June 2, 2026 | 4d | 1,853 | $119 | $220K | derivative | Form 4 ↗ | |
| Mayo Stephen | Other A | May 29, 2026 | June 2, 2026 | 4d | 1,853 | $119 | $220K | derivative | Form 4 ↗ | |
| LAVIZZO-MOUREY RISA J | Other A | May 29, 2026 | June 2, 2026 | 4d | 1,853 | $119 | $220K | derivative | Form 4 ↗ | |
| GLOCER THOMAS H | Other A | May 29, 2026 | June 2, 2026 | 4d | 1,853 | $119 | $220K | derivative | Form 4 ↗ | |
| Craig Pamela J. | Other A | May 29, 2026 | June 2, 2026 | 4d | 1,853 | $119 | $220K | derivative | Form 4 ↗ | |
| BAKER DOUGLAS M JR | Other A | May 29, 2026 | June 2, 2026 | 4d | 1,853 | $119 | $220K | derivative | Form 4 ↗ | |
| Zachary Jennifer | Other A | May 5, 2026 | May 7, 2026 | 2d | 35,312 | — | — | derivative | Form 4 ↗ | |
| Zachary Jennifer | Other A | May 5, 2026 | May 7, 2026 | 2d | 12,064 | — | — | derivative | Form 4 ↗ | |
| Williams David Michael | Other A | May 5, 2026 | May 7, 2026 | 2d | 13,582 | — | — | derivative | Form 4 ↗ | |
| Williams David Michael | Other A | May 5, 2026 | May 7, 2026 | 2d | 4,640 | — | — | derivative | Form 4 ↗ | |
| Litchfield Caroline | Other A | May 5, 2026 | May 7, 2026 | 2d | 46,566 | — | — | derivative | Form 4 ↗ | |
| Litchfield Caroline | Other A | May 5, 2026 | May 7, 2026 | 2d | 15,908 | — | — | derivative | Form 4 ↗ | |
| Li Dean Y | Other A | May 5, 2026 | May 7, 2026 | 2d | 58,207 | — | — | derivative | Form 4 ↗ | |
| Li Dean Y | Other A | May 5, 2026 | May 7, 2026 | 2d | 19,885 | — | — | derivative | Form 4 ↗ | |
| Larson Betty D | Other A | May 5, 2026 | May 7, 2026 | 2d | 23,283 | — | — | derivative | Form 4 ↗ | |
| Larson Betty D | Other A | May 5, 2026 | May 7, 2026 | 2d | 7,954 | — | — | derivative | Form 4 ↗ | |
| DeLuca Richard R. | Other A | May 5, 2026 | May 7, 2026 | 2d | 34,924 | — | — | derivative | Form 4 ↗ | |
| DeLuca Richard R. | Other A | May 5, 2026 | May 7, 2026 | 2d | 11,931 | — | — | derivative | Form 4 ↗ | |
| Davis Robert M | Other A | May 5, 2026 | May 7, 2026 | 2d | 139,697 | — | — | derivative | Form 4 ↗ | |
| Davis Robert M | Other A | May 5, 2026 | May 7, 2026 | 2d | 47,724 | — | — | derivative | Form 4 ↗ | |
| Foard Brian | Other A | May 5, 2026 | May 7, 2026 | 2d | 31,044 | — | — | derivative | Form 4 ↗ | |
| Foard Brian | Other A | May 5, 2026 | May 7, 2026 | 2d | 35,351 | — | — | derivative | Form 4 ↗ | |
| Foard Brian | Other A | May 5, 2026 | May 7, 2026 | 2d | 10,605 | — | — | derivative | Form 4 ↗ | |
| Maraldo David R. | Other A | May 5, 2026 | May 7, 2026 | 2d | 21,731 | — | — | derivative | Form 4 ↗ | |
| Maraldo David R. | Other A | May 5, 2026 | May 7, 2026 | 2d | 7,424 | — | — | derivative | Form 4 ↗ | |
| Oosthuizen Johannes Jacobus | Other A | May 5, 2026 | May 7, 2026 | 2d | 31,044 | — | — | derivative | Form 4 ↗ | |
| Oosthuizen Johannes Jacobus | Other A | May 5, 2026 | May 7, 2026 | 2d | 10,605 | — | — | derivative | Form 4 ↗ | |
| Smart Dalton E. III | Other A | May 5, 2026 | May 7, 2026 | 2d | 5,045 | — | — | derivative | Form 4 ↗ | |
| Smart Dalton E. III | Other A | May 5, 2026 | May 7, 2026 | 2d | 2,298 | — | — | derivative | Form 4 ↗ | |
| Guindo Chirfi | Other A | May 5, 2026 | May 7, 2026 | 2d | 19,402 | — | — | derivative | Form 4 ↗ | |
| Guindo Chirfi | Other A | May 5, 2026 | May 7, 2026 | 2d | 6,628 | — | — | derivative | Form 4 ↗ | |
| Smart Dalton E. III | Option / conversion M | May 2, 2026 | May 5, 2026 | 3d | 383 | — | — | derivative | Form 4 ↗ | |
| Smart Dalton E. III | Sell F | May 2, 2026 | May 5, 2026 | 3d | 132 | $112 | $15K | Form 4 ↗ | ||
| Smart Dalton E. III | Option / conversion M | May 2, 2026 | May 5, 2026 | 3d | 383 | $112 | $43K | Form 4 ↗ | ||
| Maraldo David R. | Option / conversion M | May 2, 2026 | May 5, 2026 | 3d | 552 | — | — | derivative | Form 4 ↗ | |
| Maraldo David R. | Sell F | May 2, 2026 | May 5, 2026 | 3d | 159 | $112 | $18K | Form 4 ↗ | ||
| Maraldo David R. | Option / conversion M | May 2, 2026 | May 5, 2026 | 3d | 552 | $112 | $62K | Form 4 ↗ | ||
| Guindo Chirfi | Option / conversion M | April 29, 2026 | May 1, 2026 | 2d | 1,967 | — | — | derivative | Form 4 ↗ | |
| Guindo Chirfi | Sell F | April 29, 2026 | May 1, 2026 | 2d | 969 | $110 | $107K | Form 4 ↗ | ||
| Guindo Chirfi | Option / conversion M | April 29, 2026 | May 1, 2026 | 2d | 1,967 | $110 | $216K | Form 4 ↗ | ||
| Chattopadhyay Sanat | Option / conversion M | April 29, 2026 | May 1, 2026 | 2d | 2,597 | — | — | derivative | Form 4 ↗ | |
| Chattopadhyay Sanat | Sell F | April 29, 2026 | May 1, 2026 | 2d | 1,130 | $110 | $124K | Form 4 ↗ | ||
| Chattopadhyay Sanat | Option / conversion M | April 29, 2026 | May 1, 2026 | 2d | 2,597 | $110 | $286K | Form 4 ↗ | ||
| DeLuca Richard R. | Option / conversion M | April 29, 2026 | May 1, 2026 | 2d | 2,518 | — | — | derivative | Form 4 ↗ | |
| DeLuca Richard R. | Sell F | April 29, 2026 | May 1, 2026 | 2d | 1,241 | $110 | $137K | Form 4 ↗ | ||
| DeLuca Richard R. | Option / conversion M | April 29, 2026 | May 1, 2026 | 2d | 2,518 | $110 | $277K | Form 4 ↗ | ||
| Williams David Michael | Option / conversion M | April 29, 2026 | May 1, 2026 | 2d | 1,377 | — | — | derivative | Form 4 ↗ | |
| Williams David Michael | Sell F | April 29, 2026 | May 1, 2026 | 2d | 679 | $110 | $75K | Form 4 ↗ | ||
| Williams David Michael | Option / conversion M | April 29, 2026 | May 1, 2026 | 2d | 1,377 | $110 | $152K | Form 4 ↗ | ||
| Smart Dalton E. III | Option / conversion M | April 30, 2026 | May 1, 2026 | 1d | 464 | — | — | derivative | Form 4 ↗ | |
| Smart Dalton E. III | Option / conversion M | April 29, 2026 | May 1, 2026 | 2d | 944 | — | — | derivative | Form 4 ↗ | |
| Smart Dalton E. III | Sell F | April 30, 2026 | May 1, 2026 | 1d | 159 | $111 | $18K | Form 4 ↗ | ||
| Smart Dalton E. III | Option / conversion M | April 30, 2026 | May 1, 2026 | 1d | 464 | $111 | $51K | Form 4 ↗ | ||
| Smart Dalton E. III | Sell F | April 29, 2026 | May 1, 2026 | 2d | 324 | $110 | $36K | Form 4 ↗ | ||
| Smart Dalton E. III | Option / conversion M | April 29, 2026 | May 1, 2026 | 2d | 944 | $110 | $104K | Form 4 ↗ | ||
| Li Dean Y | Option / conversion M | April 29, 2026 | May 1, 2026 | 2d | 4,722 | — | — | derivative | Form 4 ↗ | |
| Li Dean Y | Sell F | April 29, 2026 | May 1, 2026 | 2d | 2,326 | $110 | $256K | Form 4 ↗ | ||
| Li Dean Y | Option / conversion M | April 29, 2026 | May 1, 2026 | 2d | 4,722 | $110 | $520K | Form 4 ↗ | ||
| Zachary Jennifer | Option / conversion M | April 29, 2026 | May 1, 2026 | 2d | 2,951 | — | — | derivative | Form 4 ↗ | |
| Zachary Jennifer | Sell F | April 29, 2026 | May 1, 2026 | 2d | 1,454 | $110 | $160K | Form 4 ↗ | ||
| Zachary Jennifer | Option / conversion M | April 29, 2026 | May 1, 2026 | 2d | 2,951 | $110 | $325K | Form 4 ↗ | ||
| Larson Betty D | Option / conversion M | April 30, 2026 | May 1, 2026 | 1d | 11,350 | — | — | derivative | Form 4 ↗ | |
| Larson Betty D | Option / conversion M | April 29, 2026 | May 1, 2026 | 2d | 2,085 | — | — | derivative | Form 4 ↗ | |
| Larson Betty D | Sell F | April 30, 2026 | May 1, 2026 | 1d | 5,143 | $111 | $571K | Form 4 ↗ | ||
| Larson Betty D | Option / conversion M | April 30, 2026 | May 1, 2026 | 1d | 11,350 | $111 | $1.3M | Form 4 ↗ | ||
| Larson Betty D | Sell F | April 29, 2026 | May 1, 2026 | 2d | 715 | $110 | $79K | Form 4 ↗ | ||
| Larson Betty D | Option / conversion M | April 29, 2026 | May 1, 2026 | 2d | 2,085 | $110 | $229K | Form 4 ↗ | ||
| Litchfield Caroline | Option / conversion M | April 29, 2026 | May 1, 2026 | 2d | 3,935 | — | — | derivative | Form 4 ↗ | |
| Litchfield Caroline | Sell F | April 29, 2026 | May 1, 2026 | 2d | 1,938 | $110 | $213K | Form 4 ↗ | ||
| Litchfield Caroline | Option / conversion M | April 29, 2026 | May 1, 2026 | 2d | 3,935 | $110 | $433K | Form 4 ↗ | ||
| Davis Robert M | Option / conversion M | April 29, 2026 | May 1, 2026 | 2d | 13,300 | — | — | derivative | Form 4 ↗ | |
| Davis Robert M | Sell F | April 29, 2026 | May 1, 2026 | 2d | 6,551 | $110 | $721K | Form 4 ↗ | ||
| Davis Robert M | Option / conversion M | April 29, 2026 | May 1, 2026 | 2d | 13,300 | $110 | $1.5M | Form 4 ↗ | ||
| Oosthuizen Johannes Jacobus | Option / conversion M | April 29, 2026 | May 1, 2026 | 2d | 1,377 | — | — | derivative | Form 4 ↗ | |
| Oosthuizen Johannes Jacobus | Sell F | April 29, 2026 | May 1, 2026 | 2d | 679 | $110 | $75K | Form 4 ↗ | ||
| Oosthuizen Johannes Jacobus | Option / conversion M | April 29, 2026 | May 1, 2026 | 2d | 1,377 | $110 | $152K | Form 4 ↗ | ||
| Seidman Christine E | Other A | March 31, 2026 | April 1, 2026 | 1d | 68 | $120 | $8,125 | derivative | Form 4 ↗ | |
| GLOCER THOMAS H | Other A | March 31, 2026 | April 1, 2026 | 1d | 405 | $120 | $49K | derivative | Form 4 ↗ | |
| Coe Mary Ellen | Other A | March 31, 2026 | April 1, 2026 | 1d | 249 | $120 | $30K | derivative | Form 4 ↗ | |
| Guindo Chirfi | Sell S | February 12, 2026 | February 12, 2026 | 0d | 10,000 | $121 | $1.2M | Form 4 ↗ | ||
| Li Dean Y | Sell S | February 10, 2026 | February 10, 2026 | 0d | 10,235 | $118 | $1.2M | Form 4 ↗ | ||
| Guindo Chirfi | Sell S | February 9, 2026 | February 9, 2026 | 0d | 10,000 | $118 | $1.2M | Form 4 ↗ | ||
| Zachary Jennifer | Option / conversion M | February 9, 2026 | February 9, 2026 | 0d | 38,835 | — | — | derivative | Form 4 ↗ | |
| Zachary Jennifer | Option / conversion M | February 9, 2026 | February 9, 2026 | 0d | 56,792 | — | — | derivative | Form 4 ↗ | |
| Zachary Jennifer | Option / conversion M | February 9, 2026 | February 9, 2026 | 0d | 25,946 | — | — | derivative | Form 4 ↗ | |
| Zachary Jennifer | Sell S | February 9, 2026 | February 9, 2026 | 0d | 38,835 | $119 | $4.6M | Form 4 ↗ | ||
| Zachary Jennifer | Option / conversion M | February 9, 2026 | February 9, 2026 | 0d | 38,835 | $119 | $4.6M | Form 4 ↗ | ||
| Zachary Jennifer | Sell S | February 9, 2026 | February 9, 2026 | 0d | 56,792 | $119 | $6.8M | Form 4 ↗ | ||
| Zachary Jennifer | Option / conversion M | February 9, 2026 | February 9, 2026 | 0d | 56,792 | $119 | $6.8M | Form 4 ↗ | ||
| Zachary Jennifer | Sell S | February 9, 2026 | February 9, 2026 | 0d | 25,946 | $119 | $3.1M | Form 4 ↗ | ||
| Zachary Jennifer | Option / conversion M | February 9, 2026 | February 9, 2026 | 0d | 25,946 | $119 | $3.1M | Form 4 ↗ | ||
| Williams David Michael | Option / conversion M | February 6, 2026 | February 6, 2026 | 0d | 5,000 | — | — | derivative | Form 4 ↗ | |
| Williams David Michael | Sell S | February 6, 2026 | February 6, 2026 | 0d | 5,000 | $122 | $610K | Form 4 ↗ | ||
| Williams David Michael | Option / conversion M | February 6, 2026 | February 6, 2026 | 0d | 5,000 | $78 | $388K | Form 4 ↗ | ||
| Smart Dalton E. III | Option / conversion M | February 4, 2026 | February 6, 2026 | 2d | 4,000 | — | — | derivative | Form 4 ↗ | |
| Smart Dalton E. III | Sell S | February 4, 2026 | February 6, 2026 | 2d | 2,400 | $120 | $287K | Form 4 ↗ | ||
| Smart Dalton E. III | Sell S | February 4, 2026 | February 6, 2026 | 2d | 4,000 | $120 | $479K | Form 4 ↗ | ||
| Smart Dalton E. III | Option / conversion M | February 4, 2026 | February 6, 2026 | 2d | 4,000 | $62 | $248K | Form 4 ↗ | ||
| Oosthuizen Johannes Jacobus | Sell S | February 6, 2026 | February 6, 2026 | 0d | 15,000 | $122 | $1.8M | Form 4 ↗ | ||
| Litchfield Caroline | Option / conversion M | February 4, 2026 | February 6, 2026 | 2d | 41,997 | — | — | derivative | Form 4 ↗ | |
| Litchfield Caroline | Sell S | February 4, 2026 | February 6, 2026 | 2d | 41,997 | $120 | $5.0M | Form 4 ↗ | ||
| Litchfield Caroline | Option / conversion M | February 4, 2026 | February 6, 2026 | 2d | 41,997 | $53 | $2.2M | Form 4 ↗ | ||
| Li Dean Y | Option / conversion M | February 4, 2026 | February 6, 2026 | 2d | 15,087 | — | — | derivative | Form 4 ↗ | |
| Li Dean Y | Sell S | February 4, 2026 | February 6, 2026 | 2d | 15,087 | $119 | $1.8M | Form 4 ↗ | ||
| Li Dean Y | Option / conversion M | February 4, 2026 | February 6, 2026 | 2d | 15,087 | $56 | $845K | Form 4 ↗ | ||
| Guindo Chirfi | Sell S | February 5, 2026 | February 6, 2026 | 1d | 20,000 | $122 | $2.4M | Form 4 ↗ | ||
| DeLuca Richard R. | Sell S | February 6, 2026 | February 6, 2026 | 0d | 37,685 | $121 | $4.6M | Form 4 ↗ | ||
| Davis Robert M | Sell S | February 4, 2026 | February 6, 2026 | 2d | 32,462 | $118 | $3.8M | Form 4 ↗ | ||
| Davis Robert M | Sell S | February 4, 2026 | February 6, 2026 | 2d | 14,972 | $117 | $1.8M | Form 4 ↗ | ||
| Zachary Jennifer | Other A | January 26, 2026 | January 28, 2026 | 2d | 11,583 | $107 | $1.2M | Form 4 ↗ | ||
| Williams David Michael | Other A | January 26, 2026 | January 28, 2026 | 2d | 6,112 | $107 | $656K | Form 4 ↗ | ||
| Smart Dalton E. III | Other A | January 26, 2026 | January 28, 2026 | 2d | 1,066 | $107 | $114K | Form 4 ↗ | ||
| Romanelli Joseph | Other A | January 26, 2026 | January 28, 2026 | 2d | 5,703 | $107 | $613K | Form 4 ↗ | ||
| Oosthuizen Johannes Jacobus | Other A | January 26, 2026 | January 28, 2026 | 2d | 5,026 | $107 | $540K | Form 4 ↗ | ||
| Litchfield Caroline | Other A | January 26, 2026 | January 28, 2026 | 2d | 15,852 | $107 | $1.7M | Form 4 ↗ | ||
| Li Dean Y | Other A | January 26, 2026 | January 28, 2026 | 2d | 20,469 | $107 | $2.2M | Form 4 ↗ | ||
| Guindo Chirfi | Other A | January 26, 2026 | January 28, 2026 | 2d | 9,865 | $107 | $1.1M | Form 4 ↗ | ||
| DeLuca Richard R. | Other A | January 26, 2026 | January 28, 2026 | 2d | 12,264 | $107 | $1.3M | Form 4 ↗ | ||
| Davis Robert M | Other A | January 26, 2026 | January 28, 2026 | 2d | 47,434 | $107 | $5.1M | Form 4 ↗ | ||
| Chattopadhyay Sanat | Other A | January 26, 2026 | January 28, 2026 | 2d | 13,880 | $107 | $1.5M | Form 4 ↗ | ||
| Seidman Christine E | Other A | December 31, 2025 | January 5, 2026 | 5d | 77 | $105 | $8,125 | latederivative | Form 4 ↗ | |
| GLOCER THOMAS H | Other A | December 31, 2025 | January 5, 2026 | 5d | 463 | $105 | $49K | latederivative | Form 4 ↗ | |
| Coe Mary Ellen | Other A | December 31, 2025 | January 5, 2026 | 5d | 285 | $105 | $30K | latederivative | Form 4 ↗ | |
| Downing Cristal N | Sell S | November 10, 2025 | November 12, 2025 | 2d | 7,085 | $87 | $616K | Form 4 ↗ | ||
| Williams David Michael | Sell S | November 3, 2025 | November 4, 2025 | 1d | 8,614 | $84 | $720K | Form 4 ↗ | ||
| Seidman Christine E | Other A | September 30, 2025 | October 2, 2025 | 2d | 97 | $84 | $8,125 | derivative | Form 4 ↗ | |
| GLOCER THOMAS H | Other A | September 30, 2025 | October 2, 2025 | 2d | 581 | $84 | $49K | derivative | Form 4 ↗ | |
| Coe Mary Ellen | Other A | September 30, 2025 | October 2, 2025 | 2d | 357 | $84 | $30K | derivative | Form 4 ↗ |
Congressional trades
| Filer | Side | Trade date | Disclosed | Lag | Shares | Price | Value | Flags | Source | Share |
|---|---|---|---|---|---|---|---|---|---|---|
| Maria Elvira Salazar | Sell | September 24, 2026 | October 7, 2026 | 13d | — | — | $1,001–$15K | House PTR ↗ | ||
| Maria Elvira Salazar | Buy | August 19, 2026 | September 9, 2026 | 21d | — | — | $15K–$50K | House PTR ↗ | ||
| Maria Elvira Salazar | Buy | August 19, 2026 | September 9, 2026 | 21d | — | — | $15K–$50K | House PTR ↗ | ||
| Alan Armstrong | Sell | March 27, 2026 | July 21, 2026 | 116d | — | — | $15K–$50K | late | Senate PTR ↗ | |
| Josh Gottheimer | Buy | February 4, 2026 | March 16, 2026 | 40d | — | — | $1,001–$15K | joint | House PTR ↗ | |
| Julie Johnson | Sell | December 18, 2025 | January 15, 2026 | 28d | — | — | $1,001–$15K | joint | House PTR ↗ | |
| Gilbert Ray Cisneros, Jr. | Buy | December 19, 2025 | January 12, 2026 | 24d | — | — | $1,001–$15K | House PTR ↗ | ||
| Gilbert Ray Cisneros, Jr. | Buy | November 18, 2025 | December 15, 2025 | 27d | — | — | $1,001–$15K | House PTR ↗ | ||
| Julie Johnson | Sell | November 13, 2025 | December 11, 2025 | 28d | — | — | $1,001–$15K | joint | House PTR ↗ | |
| Val T. Hoyle | Sell | September 23, 2025 | October 10, 2025 | 17d | — | — | $1,001–$15K | spouse | House PTR ↗ | |
| Sheri Biggs | Sell | March 19, 2025 | October 5, 2025 | 200d | — | — | $15K–$50K | latespouse | House PTR ↗ |
Related stocks
Tickers traded by the same people who traded MRK, by number of filers in common. It shows overlap in public filings and nothing else.
- MSFT Microsoft Corporation - Common Stock 7 filers in common
- PGR Progressive Corporation 6 filers in common
- UNH UnitedHealth Group Incorporated Common Stock 6 filers in common
- BRK.B Berkshire Hathaway Inc. New Common Stock 6 filers in common
- CVX Chevron Corporation Common Stock 5 filers in common
- SCHW Charles Schwab Corporation 5 filers in common
- IBM International Business Machines Corporation Common Stock 5 filers in common
- CSCO Cisco Systems, Inc. - Common Stock 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.
- Form 4 transaction codes P = purchase. S = sale. These are the two market trades.
- Insider buying vs insider selling Selling outweighs buying by a wide margin in normal times.
- How to read a congressional trade report Owner tells you whose asset it was: the member, the spouse, a dependent child, or held jointly.
- Why congressional trade amounts are ranges There are ten ranges; the lowest is $1,001–$15,000 and the highest is over $50,000,000.
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 |
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.
Insider rows are Form 4 filings for this issuer from SEC EDGAR; congressional rows are periodic transaction reports parsed from the House Clerk and the Senate eFD. Values use the reported price for Form 4 and the disclosed range for Congress. See methodology and corrections.
Not investment advice. Disclosures are shown as filed and may lag the trade or be amended. No recommendation is made or implied.