Company Story
1915 - Sinclair Oil Corporation was founded by Harry F. Sinclair
1922 - Sinclair Oil Corporation went public with an initial public offering (IPO)
1949 - Sinclair Oil Corporation discovered oil in the Gulf of Mexico
1969 - Sinclair Oil Corporation merged with Atlantic Richfield Company (ARCO)
1999 - ARCO was acquired by BP Amoco, and Sinclair Oil Corporation became an independent company again
2011 - Sinclair Oil Corporation acquired Tulsa-based Sinclair Transportation Company
2020 - Sinclair Oil Corporation merged with HollyFrontier Corporation to form HF Sinclair Corporation