As of January 2026 Sirius XM has a market cap of โน641.47 Billion. This makes Sirius XM the world's 2541th 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 Sirius XM was reported to be: