Trade Summary

5 days ago, Guindo Chirfi, serving as EVP, Access, Policy & Comms at Merck & Co., Inc. (MRK), sold 15,000 shares at $131.00 per share, for a total transaction value of $1,965,000.00. Following this transaction, Guindo Chirfi now holds 46,613 shares of MRK.

This sale represents a 24.35% decrease in Guindo Chirfi's stake in the company. This is considered a high-conviction trade given the significant change in ownership.

The trade was executed on Thursday, August 6, 2026 and publicly disclosed via SEC Form 4 filing on Friday, August 7, 2026 at 4:17 PM ET, 1 day after the trade was made.

Merck & Co., Inc. operates in the HEALTHCARE sector, specifically within the DRUG MANUFACTURERS - GENERAL industry. Insider selling activity in this sector can provide valuable signals about industry trends and company-specific developments.