MRK ▼ -1.2% - Merck & Co., Inc. $MRK Merck veteran and psychedelics developer tapped for top FDA job Merck shares fell 1.2% today following news that a company veteran and psychedelics researcher has been selected for a top FDA position. The appointment may signal potential regulatory shifts affecting Merck's pipeline and competitive positioning, particularly as the FDA leadership could influence drug approval timelines and policies relevant to the pharmaceutical industry. 08-SEP-2026 04:11 PM ET