As of December 2025 Occidental Petroleum has a market cap of A$59.61 Billion. This makes Occidental Petroleum the world's 589th 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 21st, 2025 the market cap of Occidental Petroleum was reported to be: