Anglo-Persian Oil Company was created in 1908.
Paz Oil Company was created in 1922.
Pars Oil Company was created in 1959.
Sirte Oil Company was created in 1981.
Behran Oil Company was created in 1963.
Vacuum Oil Company was created in 1866.
Marland Oil Company was created in 1917.
Cosmo Oil Company was created in 1986.
Jamuna Oil Company was created in 1964.
Scurlock Oil Company was created in 1936.
Roc Oil Company was created in 1997.
Kuwait Oil Company was created in 1934.
Oman Oil Company was created in 1996.