Behran Oil Company was created in 1963.
Sirte Oil Company was created in 1981.
Jamuna Oil Company was created in 1964.
Cosmo Oil Company was created in 1986.
Vacuum Oil Company was created in 1866.
Paz Oil Company was created in 1922.
Pars Oil Company was created in 1959.
Roc Oil Company was created in 1997.
Oman Oil Company was created in 1996.
Kuwait Oil Company was created in 1934.
Marland Oil Company was created in 1917.
Scurlock Oil Company was created in 1936.
National Iranian Oil Company was created in 1948.