As of January 2026 Merck has a market cap of A$403.42 Billion. This makes Merck the world's 56th most valuable company by market cap according to our data. The market capitalization, commonly called market cap, is the total market value of a publicly traded company's outstanding shares and is commonly used to measure how much a company is worth.
On Jan 13th, 2026 the market cap of Merck was reported to be: