Company Story
1920 - Founded by Armand Hammer as the Occidental Petroleum Corporation of California
1955 - The company merged with Hooker Chemical Company to form Occidental Petroleum and Chemical Corporation
1964 - Occidental acquired Hooker Chemical Company and changed its name to Occidental Petroleum Corporation
1970s - Expanded globally, particularly in the Middle East and North Africa, through various acquisitions and partnerships
1980s - Became one of the largest oil producers in the United States, with significant operations in California, Texas, and Oklahoma
1986 - Warren Buffett's Berkshire Hathaway acquired a significant stake in Occidental Petroleum Corporation
1990s - Focused on increasing production and reserves through strategic acquisitions and divestitures
2001 - Occidental Petroleum Corporation spun off its chemical business, OxyChem, into a separate publicly traded company
2005 - Acquired the oil and gas operations of Vintage Petroleum, Inc.
2019 - Acquired Anadarko Petroleum Corporation for $38 billion, expanding its presence in the United States and internationally
2020 - Sold its interests in the Ghanaian offshore oil field, to focus on core assets