According to U.S. Treasury and reports the following companies are among some entities affiliate to EIKO (aka Setad):

Barakat Foundation;
Tadbir Economic Development Group Company (TEDG);
Tadbir Energy Group;
Pars Oil Company;
Bahman Geno Company (Hormoz Oil Refinery Company);
The Persia Company of Oil and Gas Industry Development;
Qaed Basir Petrochemical Products Company;
North Drilling Company;
Tadbir Drilling Development Company;
Rey Niroo Engineering Company;
Abadan Electrical power generation company;
Modaberan Chemistry Company;
Tadbir Parsian Refining Company;
Pars Bazargan Trading Company;
Iran Mobin Electronic Development (Holding Co.);
Tose’e Etemad Mobin (TEM);
Mehr Eghtesad Novin Company;
Telecommunication Company of Iran (TCI)(shared with Islamic Revolutionary Guard Corps);
Mobile Telecommunication Company of Iran (MCI) (shared with Islamic Revolutionary Guard Corps);
Taliya Communications;
Tadbir Industry and Mine Development Company;
Karun Phosphate Complex Products Company;
Abadgaran Ma’dan Iranian;
Ayandegaran Sanat va Madan farda;
Tadbir Investment Group;
Tosee Eqtesad Ayandehsazan Company (TEACO);
Barakat Pharmed Company;
Tadbir Construction Development Group;

An organigram for EIKO (Setad) as of 2002-3 produced The U.S. Department of the Treasury is as follow:

ifmat - EIKO organizations

Source » treasury