As of December 2025 Gossamer Bio has a market cap of C$1.11 Billion. This makes Gossamer Bio the world's 6344th 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 Dec 9th, 2025 the market cap of Gossamer Bio was reported to be: