As of May 2026 Oman Oil Marketing Company (oomco) has a market cap of โน18.04 Billion. This makes Oman Oil Marketing Company (oomco) the world's 8747th 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.