Insider Transaction Report for Merck & Co., Inc.

Johannes Jacobus Oosthuizen, EVP, Oncology & Int?l at Merck & Co., Inc., reported a series of transactions on April 29, 2026. Oosthuizen acquired 1377 shares of Common Stock at a price of $110.03 per share, increasing his post-transaction holdings to 22574.389 shares. Concurrently, he disposed of 679 shares of Common Stock at the same price, resulting in 21895.389 shares remaining. Additionally, Oosthuizen disposed of 1377 Restricted Stock Units, which were convertible into Common Stock. These transactions were part of a vesting schedule for RSUs that began distribution on 4/29/2026 and continues through 4/29/2028, with each unit representing one share of common stock.