| Amoco | oil company | Chicago | 1889 |
| Chevron Corporation | oil company, corporation, organization, gas station chain, enterprise, public company | — | — |
| Devon Energy | business, enterprise, public company | Oklahoma City | 1971 |
| Enterprise Products | business, public company | Houston | 1968 |
| Esso | brand, gas station chain | Irving | 1911 |
| Exxon | oil company, business, gas station chain, public company | Las Colinas | January 1, 1973 |
| ExxonMobil | oil company, multinational corporation, business, gas station chain, enterprise, public company | Spring | August 5, 1882 |
| Getty Oil | business, gas station chain | East Meadow | 1964 |
| Hess Corporation | holding company, business, gas station chain, enterprise, public company | New York City | 1919 |
| Jet | brand, business, gas station chain | — | — |
| Marathon Petroleum | business, gas station chain, public company | Findlay | 2009 |
| Occidental Petroleum | business, public company | Houston | 1920 |
| Sinclair Oil Corporation | business, gas station chain | Salt Lake City | May 1, 1916 |
| Society of Petroleum Engineers | engineering society, nonprofit organization, professional association, academic publisher | Richardson, Texas, United States | October 6, 1957 |
| Standard Oil of Ohio | business, gas station chain | Cleveland | 1911 |
| Tesoro Corporation | business, gas station chain, enterprise, public company | — | 1968 |
| Williams Companies | energy company, public company | Tulsa | 1908 |