// company-profile
Merck & Co., Inc. Insider Trading
MRKEvery SEC Form 4 insider trading filing for Merck & Co., Inc. (MRK) — open-market buys and sells by directors and officers, option exercises, and cluster activity, updated as each filing is reported to the SEC.
curl "https://api.form4api.com/v1/transactions?ticker=MRK" -H "X-Api-Key: YOUR_API_KEY"// activity-summary
Recent insider activity is bullish. Over the last 30 days, 12 insiders purchased shares versus 7 sales. Buying was led by Williams David Michael.
// 90-day insight
Over the last 90 days, Merck & Co., Inc. insiders bought $8.2M (27 transactions) and sold $11.2M (7 transactions).
- Most active insider: Williams David Michael with 9 transactions totaling $10.7M.
- Largest single sale: $4.5M by Williams David Michael on Aug 5, 2026.
Activity skews bullish — buys outpace sales.
Institutional Ownership
Top 13F-HR holders of Merck & Co., Inc. as of 2026-06-30
Data source: quarterly 13F-HR filings — institutional holders report positions within 45 days of quarter end. Joined with insider activity above — see who's loading up institutionally while insiders are trading. Full 13F-HR API →
Insider Transactions
Sourced from SEC EDGAR Form 4 filings. Updated hourly.
| Date | Insider | Company | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Aug 6, 2026 | Guindo Chirfi | MRK | Sale | 15,000 | $131.00 | $1.97M |
| Aug 5, 2026 | Maraldo David R. | MRK | Option Exercise | 6,311 | $0.00 | $0K |
| Aug 5, 2026 | Maraldo David R. | MRK | Sale | 9,709 | $128.72 | $1.25M |
| Aug 5, 2026 | Williams David Michael | MRK | Option Exercise | 34,705 | $73.73 | $2.56M |
| Aug 5, 2026 | Maraldo David R. | MRK | Option Exercise | 2,686 | $84.71 | $228K |
45 more transactions hidden
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