X0203 0000876661 NEW YORK STOCK EXCHANGE LLC 0000310158 Merck & Co., Inc. 001-06571

126 EAST LINCOLN AVE Rahway NJ NEW JERSEY 07065

(908) 740-4000 1.875% Notes due 2026 17 CFR 240.12d2-2(a)(2) Anthony Sozzi Analyst, Market Watch 2026-10-15