Chirfi Guindo insider trades: Merck (MRK) stock sales
Trades on the price chart
Daily close, with an arrow on each day they bought or sold
Companies
Where Chirfi reports to the SEC
Open-market buys and sales
6 trades reported on SEC Form 4, newest first
| Date | Stock | Type | Shares | Price | Value | Holding | Reported |
|---|---|---|---|---|---|---|---|
| Aug 13, 2026 | MRK | ↓ Sell | 10,000 | $135.00 | $1.4M | Direct | Aug 13, 2026 (0d) |
| Aug 6, 2026 | MRK | ↓ Sell | 15,000 | $131.00 | $2.0M | Direct | Aug 7, 2026 (1d) |
| Feb 12, 2026 | MRK | ↓ Sell | 10,000 | $121.46 | $1.2M | Direct | Feb 12, 2026 (0d) |
| Feb 9, 2026 | MRK | ↓ Sell | 10,000 | $118.41 | $1.2M | Direct | Feb 9, 2026 (0d) |
| Feb 5, 2026 | MRK | ↓ Sell | 20,000 | $121.88 | $2.4M | Direct | Feb 6, 2026 (1d) |
| Jun 7, 2021 | BIIB | ↓ Sell | 3,087 | $440.00 | $1.4M | Direct | Jun 9, 2021 (2d) |
Each row is one filing's trades in one stock, summed. Shares and prices are as filed, before any later stock split.
Other MRK insiders
Open-market trades in the last 12 months
About Chirfi Guindo's insider trades
Chirfi Guindo is EVP, Access, Policy & Comms at Merck (MRK). Since Jun 7, 2021, Chirfi has reported no open-market purchases and 6 sales worth $9.5M on SEC Form 4. In the last 12 months: 5 sales ($8.2M).
Their filings also include grants and awards (15 filings), shares withheld for taxes (10 filings), option exercises (10 filings), other transactions (7 filings). These aren't open-market trades and aren't counted above.
How to read insider trades
Officers, directors and owners of more than 10% of a company must report trades in its stock on SEC Form 4, usually within two business days. Purchases with their own money are the stronger signal: insiders sell for many reasons (taxes, diversification, a house), but buy for one. See every MRK insider trade, the latest insider trades across the market, or cluster buys, when several insiders buy the same stock within days.