As of December 2025 SEI Investments has a market cap of โน906.80 Billion. This makes SEI Investments the world's 1930th 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 SEI Investments was reported to be: