| ARCO | oil company, business, gas station chain, enterprise | Los Angeles | 1966 |
| Baker Hughes | business, enterprise, public company | Houston | 1987 |
| ConocoPhillips | business, enterprise, public company | Houston | 1875 |
| 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 |
| Getty Oil | business, gas station chain | East Meadow | 1964 |
| Jet | brand, business, gas station chain | — | — |
| Koch, Inc. | privately held company, business, enterprise | Wichita | 1940 |
| Marathon Oil | business, enterprise, public company | Houston | 1887 |
| Marathon Petroleum | business, gas station chain, public company | Findlay | 2009 |
| Noble Energy | business, enterprise, public company | Houston | 1932 |
| Occidental Petroleum | business, public company | Houston | 1920 |
| Pennzoil | business, enterprise | Houston | 1963 |
| Phillips 66 | business, gas station chain, enterprise, public company | Westchase | May 1, 2012 |
| Sinclair Oil Corporation | business, gas station chain | Salt Lake City | May 1, 1916 |
| SLB | business, enterprise, public company, oilfield service company | Houston | 1926 |
| Standard Oil of Ohio | business, gas station chain | Cleveland | 1911 |
| Sunoco | oil company, business, gas station chain, enterprise | Dallas | 1886 |
| Union Carbide | business, enterprise | Danbury | 1957 |
| Valero Energy | business, gas station chain, enterprise, public company | — | 1980 |