As of December 2025 Ionis Pharmaceuticals has a market cap of C$18.48 Billion. This makes Ionis Pharmaceuticals the world's 1570th 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 4th, 2025 the market cap of Ionis Pharmaceuticals was reported to be: