MRK
Merck & Co., Inc. · Healthcare · Market cap $369.8B
Insiders sold $30.0M net in the last 90 days ·5 sellers, 0 buyers· latest Form 4 filed Aug 13, 2026
Insider Buying
$0
reported purchases (SEC code P)
Insider Selling
$72.0M
reported sales (SEC code S)
Unique Insiders
11
in the rolling window
Latest filing
Aug 13, 2026
Zachary Jennifer
Merck & Co., Inc. (MRK) has 45 SEC Form 4 filings (91 transaction rows) in the rolling window, disclosed by 11 distinct insiders. Most recent filing: Aug 13, 2026.
Inside the rolling window, 11 insiders at Merck & Co., Inc. reported no open-market purchases and 23 open-market sales totaling $72.0M. The most active filer is EVP, Access, Policy & Comms Guindo Chirfi with 5 filings. Insiders have net sold $30.0M over the trailing 6 months. The most recent open-market filing is a sale of 80,315 shares by EVP, General Counsel Zachary Jennifer, dated Aug 12, 2026, worth $10.7M.
- Industry:Drug Manufacturers - General
- CEO:Robert Davis
- Employees:74,000
- HQ:Rahway, NJ, US
- IPO:1978-01-13
| Source | |||||||
|---|---|---|---|---|---|---|---|
Zachary JenniferFirst in 6 months | EVP, General Counsel | Sale | 80,315 | $10.7M | Aug 13 | +10.6% | SEC ↗ |
| EVP, Access, Policy & Comms | Sale | 10,000 | $1.4M | Aug 13 | +10.6% | SEC ↗ | |
| EVP&Pres, Merck Animal Heallth | Sale | 20,784 | $2.7M | Aug 12 | +12.8% | SEC ↗ | |
| EVP&Pres, Merck Animal Heallth | Sale | 12,837 | $1.7M | Aug 12 | +12.8% | SEC ↗ | |
| EVP&Pres, Merck Animal Heallth | Sale | 11,699 | $1.5M | Aug 12 | +12.8% | SEC ↗ | |
DeLuca Richard R.First in 6 months | EVP&Pres, Merck Animal Heallth | Sale | 6,050 | $789K | Aug 10 | +14.5% | SEC ↗ |
Maraldo David R.First filing | EVP & Pres. MMD | Sale | 18,706 | $2.4M | Aug 7 | — | SEC ↗ |
Williams David MichaelFirst in 6 months | EVP,Chief Info&Digital Officer | Sale | 52,847 | $6.8M | Aug 7 | — | SEC ↗ |
Guindo ChirfiFirst in 6 months | EVP, Access, Policy & Comms | Sale | 15,000 | $2.0M | Aug 7 | — | SEC ↗ |
| Chief Marketing Officer | Sale | 10,000 | $1.2M | Feb 12 | — | SEC ↗ | |
| Executive VP & President, MRL | Sale | 10,235 | $1.2M | Feb 10 | — | SEC ↗ | |
Zachary JenniferFirst filing | EVP, General Counsel | Sale | 121,573 | $14.5M | Feb 9 | — | SEC ↗ |
| Chief Marketing Officer | Sale | 10,000 | $1.2M | Feb 9 | — | SEC ↗ | |
Li Dean YFirst filing | Executive VP & President, MRL | Sale | 15,087 | $1.8M | Feb 6 | — | SEC ↗ |
Litchfield CarolineFirst filing | EVP & CFO | Sale | 41,997 | $5.0M | Feb 6 | — | SEC ↗ |
Smart Dalton E. IIIFirst filing | SVP Fin. - Global Controller | Sale | 6,400 | $766K | Feb 6 | — | SEC ↗ |
Davis Robert MFirst filing | Chairman, CEO & President | Sale | 47,434 | $5.6M | Feb 6 | — | SEC ↗ |
Williams David MichaelFirst in 3 months | EVP,Chief Info&Digital Officer | Sale | 5,000 | $610K | Feb 6 | — | SEC ↗ |
Guindo ChirfiFirst filing | Chief Marketing Officer | Sale | 20,000 | $2.4M | Feb 6 | — | SEC ↗ |
Oosthuizen Johannes JacobusFirst filing | President, U.S. Market | Sale | 15,000 | $1.8M | Feb 6 | — | SEC ↗ |
DeLuca Richard R.First filing | EVP&Pres, Merck Animal Heallth | Sale | 37,685 | $4.6M | Feb 6 | — | SEC ↗ |
Downing Cristal NFirst filing | Chief Comm. & Public Afrs Ofcr | Sale | 7,085 | $616K | Nov 12 | — | SEC ↗ |
Williams David MichaelFirst filing | EVP,Chief Info&Digital Officer | Sale | 8,614 | $720K | Nov 4 | — | SEC ↗ |
Earnings: last 7 quarters
Congress trading MRK 264 all-time
- RRep. Maria Elvira SalazarSale$1,001 - $15,0002026-09-24
- RRep. Maria Elvira SalazarPurchase$15,001 - $50,0002026-08-19
- RRep. Maria Elvira SalazarPurchase$15,001 - $50,0002026-08-19
- RRep. Maria Elvira SalazarPurchase$15,001 - $50,0002026-08-19
- DRep. Ro KhannaPurchase$15,001 - $50,0002026-08-07
- RRep. Keith SelfSale$1,001 - $15,0002025-01-10
STOCK Act disclosures are filed up to 45 days after the trade. Amount is a disclosed range, not an exact figure.
Frequently asked questions
How many SEC Form 4 insider filings does MRK have?
Merck & Co., Inc. (MRK) has 45 SEC Form 4 filings (91 transaction rows) in the rolling 365-day window, disclosed by 11 distinct insiders. Most recent filing: Aug 13, 2026.
When was the most recent SEC Form 4 filing for MRK?
The most recent Form 4 filing for MRK on Tracefour is dated Aug 13, 2026.
Who is the most active insider at MRK?
The most active SEC Form 4 filer at MRK in the rolling window is EVP, Access, Policy & Comms Guindo Chirfi, with 5 filings.
What is the net insider flow at MRK over the last 6 months?
Over the trailing 180 days, insiders at MRK have net sold $30.0M based on SEC Form 4 disclosures.
What is the total insider buy and sell value at MRK in the current window?
Inside the rolling window, insiders at MRK bought $0 and sold $72.0M based on SEC Form 4 filings.
Can I get alerts for MRK insider trading?
Yes. Tracefour sends a free email when a new SEC Form 4 purchase or sale is filed at Merck & Co., Inc. (MRK). Alerts are set per company from the page itself, there is no paid tier, and each email links to the original filing on SEC EDGAR.
Related companies
Merck & Co., Inc. is in the Healthcare sector.