MRK insider trades & Congress trades
Merck & Co., Inc.: public insider filings and Congress disclosures, in one place.
Bourse has recorded 17 open-market insider transactions in Merck & Co., Inc. (MRK) (0 purchases with code P and 17 sales with code S), the most recent on August 13, 2026.
In the last 90 days: 0 purchases by 0 insiders ($0) and 7 sales by 3 ($18.0M).
Members of Congress have disclosed 3 trades in MRK (1 purchases, 2 sales), the latest transaction dated September 24, 2026. Congress filings can arrive up to 45 days after the trade.
Insider transactions
SEC Form 4, open-market purchases (P) and sales (S) only. Awards, option exercises and tax withholding are excluded. “After” shows the stock’s return over the month following the trade, where available.
| Date | Insider | Role | Type | Shares | Price | Value | After 1M |
|---|---|---|---|---|---|---|---|
| Aug 13, 2026 | Guindo Chirfi | EVP, Access, Policy & Comms | Sell | 10,000 | $135.00 | $1.35M | +0.1% |
| Aug 12, 2026 | DeLuca Richard R. | EVP&Pres, Merck Animal Heallth | Sell | 11,099 | $131.61 | $1.46M | +0.1% |
| Aug 12, 2026 | DeLuca Richard R. | EVP&Pres, Merck Animal Heallth | Sell | 600 | $132.04 | $79K | +0.1% |
| Aug 12, 2026 | Zachary Jennifer | EVP, General Counsel | Sell | 80,315 | $133.46 | $10.7M | +0.1% |
| Aug 11, 2026 | DeLuca Richard R. | EVP&Pres, Merck Animal Heallth | Sell | 7,410 | $131.33 | $973K | +0.1% |
| Aug 11, 2026 | DeLuca Richard R. | EVP&Pres, Merck Animal Heallth | Sell | 5,427 | $132.35 | $718K | +0.1% |
| Aug 10, 2026 | DeLuca Richard R. | EVP&Pres, Merck Animal Heallth | Sell | 20,784 | $130.43 | $2.71M | +0.1% |
| Aug 6, 2026 | Guindo Chirfi | EVP, Access, Policy & Comms | Sell | 15,000 | $131.00 | $1.97M | +0.2% |
| Aug 6, 2026 | DeLuca Richard R. | EVP&Pres, Merck Animal Heallth | Sell | 805 | $131.02 | $105K | +0.1% |
| Aug 6, 2026 | DeLuca Richard R. | EVP&Pres, Merck Animal Heallth | Sell | 4,945 | $130.23 | $644K | +0.1% |
| Aug 6, 2026 | DeLuca Richard R. | EVP&Pres, Merck Animal Heallth | Sell | 300 | $131.02 | $39K | +0.1% |
| Aug 5, 2026 | Williams David Michael | EVP,Chief Info&Digital Officer | Sell | 4,600 | $128.77 | $592K | +0.2% |
| Aug 5, 2026 | Williams David Michael | EVP,Chief Info&Digital Officer | Sell | 13,542 | $128.77 | $1.74M | +0.2% |
| Aug 5, 2026 | Williams David Michael | EVP,Chief Info&Digital Officer | Sell | 34,705 | $128.77 | $4.47M | +0.2% |
| Aug 5, 2026 | Maraldo David R. | EVP & Pres. MMD | Sell | 6,311 | $128.72 | $812K | +0.2% |
| Aug 5, 2026 | Maraldo David R. | EVP & Pres. MMD | Sell | 9,709 | $128.72 | $1.25M | +0.2% |
| Aug 5, 2026 | Maraldo David R. | EVP & Pres. MMD | Sell | 2,686 | $128.72 | $346K | +0.2% |
Congress trades
Disclosures under the STOCK Act. Amounts are reported as ranges; some trades are made by a spouse or dependent child.
| Traded | Member | Party | Type | Amount | Disclosed | Filing |
|---|---|---|---|---|---|---|
| Sep 24, 2026 | Maria Elvira Salazar | house | Sell | $1,001 - $15,000 | Oct 7, 2026 | Source |
| Aug 28, 2026 | Michael T. McCaul | house | Sell | $15,001 - $50,000 | Oct 14, 2026 | Source |
| Aug 19, 2026 | Maria Elvira Salazar | house | Buy | $15,001 - $50,000 | Sep 9, 2026 | – |
Data as of November 8, 2026. Public filings only. A purchase or sale by a politician or an insider does not by itself imply any wrongdoing.
New to these filings? Read how to read a Form 4, how Congress trades are disclosed and what insider cluster buying means. Sources and limits are on the Methodology page.
See these filings as they land
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