By CapitalSnitch Research Desk · updated Oct 11, 2026 · data from SEC filings and official Congress disclosures
Merck & Co., Inc. company insiders have only been selling lately: 11 insiders trimmed about $72 million of stock over 12 months, with no open-market purchases.
Selling on its own is common and often pre-planned (10b5-1 plans, taxes, diversification), so it matters more when it is unusually heavy or broad.
Members of Congress reported 45 trades in MRK over the past two years (18 members). On the institutional side, 3,823 funds reported holding MRK at the end of Q2 2026, and funds were split between buying and selling. Quarter by quarter: Last full quarter: net selling by insiders. Insiders bought in 1 of the last 7 full quarters.
Are insiders buying or selling MRK stock?
In the last 12 months Merck & Co., Inc. insiders made open-market purchases worth about $0 and sales worth about $72 million. Data comes from SEC Form 4 filings, updated every 30 minutes on CapitalSnitch.
When was the last insider trade in MRK?
The most recent open-market insider trade in MRK was filed on 2026-08-13.
How many institutions own MRK?
3,823 investment managers reported holding MRK in SEC Form 13F filings for Q2 2026.
Has any member of Congress traded MRK?
Yes. Members of Congress reported 45 trades in MRK over the past two years. The full list is free on CapitalSnitch.
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Public-record data for research and education, not investment advice. Insider sales are often pre-planned (10b5-1).
Congress data: Data derived from public disclosures filed under the Ethics in Government Act and the STOCK Act, republished free for public transparency and news reporting. Disclosures may lag the trade by 45 days or more and show amounts only as ranges. This data may not be used for credit rating, loan underwriting, solicitation of money (political, charitable or other), direct-mail or commercial targeting (5 U.S.C. 13107).