As of October 2026 Realty Income has a market cap of โน4.941 Trillion. This makes Realty Income the world's 478th 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 Oct 7th, 2026 the market cap of Realty Income was reported to be: