Merck & Co (NYSE:MRK) lowers FY2026 Adj EPS guidance from $5.04-$5.16 to $2.66-$2.76 vs $2.76 analyst estimate. Raises FY2026 sales outlook from $65.800 billion-$67.000 billion to $66.300 billion-$67.300 billion vs $66.802 billion estimate.