Guindo Chirfi, of Merck & Co., Inc. (NYSE:MRK), sold 36,613 shares of company stock on August 13, 2026, according to a Form 4 filing with the Securities and Exchange Commission.
At publication ·
Merck & Co., Inc. (NYSE:MRK) · insider sell
At a glance
Guindo Chirfi, of Merck & Co., Inc. (NYSE:MRK), sold 36,613 shares of company stock on August 13, 2026, according to a Form 4 filing with the Securities and Exchange Commission.
The shares were sold at an average price of $135.00 per share, for a total transaction value of $1.4M. Following this transaction, Guindo Chirfi still owns 36,613 shares of Merck & Co., Inc. stock.
Merck & Co., Inc.'s stock currently trades at $135.97, giving the company a market capitalization of $248.8B.
Insider sales are common and don't necessarily indicate a bearish outlook. Executives regularly sell shares for tax planning, diversification, or personal liquidity. The key factors to watch are the size of the sale relative to the insider's total holdings, whether multiple insiders are selling simultaneously, and whether the trades occur near earnings announcements or other catalysts.
At $1.4 million, this transaction stands out as a significant commitment. Trades of this size from corporate insiders typically attract attention from institutional investors and analysts who track Form 4 filings for early signals about company direction.
Insider transaction data is reported to the SEC via Form 4 filings, typically within two business days of the trade. Investors can track insider activity alongside other metrics — such as institutional flows, short interest, and technical indicators — to build a more complete picture of market sentiment around Merck & Co., Inc.
| Date | Insider | Type | Shares | Value |
|---|---|---|---|---|
| Aug 13, 2026 | Guindo Chirfi | Sell | 36,613 | $1.4 million |
| Aug 12, 2026 | Zachary Jennifer | Sell | 0 | |
| Aug 12, 2026 | Zachary Jennifer | Sell | 0 | |
| Aug 12, 2026 | Zachary Jennifer | Sell | 45,509 | $10.7 million |
| Aug 12, 2026 | Zachary Jennifer | Buy | 125,824 | $1.1 million |
Related Tools: Insider Trades Tracker | View MRK Stock Page
Insider insider_sells at Merck & Co., Inc. (NYSE:MRK) are reported to the SEC via Form 4 filings. While a single transaction doesn't predict future stock performance, patterns of insider buying can signal management confidence.
Monitor all insider transactions on the MRK insider trades page or the Insider Trades Tracker.
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