Merck & Co., Inc. (NYSE:MRK) is one of the 10 Best Performing Dow Stocks So Far in 2026. On March 31, 2026, Reuters announced that Infinimmune has signed an agreement with Merck & Co., Inc. (NYSE:MRK) to research and develop several antibody candidates, with potential milestone payments totaling $838 million. The deal includes an undisclosed upfront payment to Infinimmune. Merck & Co., Inc. (NYSE:MRK) retains exclusive rights to develop and commercialize the ensuing medicines. Infinimmune announced that ...