| Abade Siman |
| Abdal Industrial Project Management (MAPNA) |
| Alpha Technic |
| Arak Mashinsazi |
| Arak Petrochemical |
| Ariyan Rezin |
| Arya Sasol Polymer Co. |
| Assaluye Platform Co. |
| Asse Sanat |
| Bazookar |
| Bina Consulting Engineers Co. |
| Borna Electronic |
| Borna Godaz Co. |
| Caspian Pars Offshore Co. (CPO) |
| Chegalesh |
| CNPCI |
| Daelim, Sazeh, Kayson, IIND (JV) |
| Dana Petro Rig Co. |
| Danesh Pajooh |
| Deep Offshore Technology Co. (DOT) |
| Dena Sanat Co. |
| Dor Riz Engineering Co. |
| Ehdas Sanat Co. |
| Electrod Yazd |
| Eni Iran |
| Esfahan Subsurface Research |
| Farab & Farab International FZE |
| Farayand & Energy (FARAN) |
| Fateh Sanat Kimia |
| GAMMA Co. |
| Garmagostar |
| Global Petro Tech Kish |
| Green Refinement Co. |
| Hamedan Gas |
| HICO FZE |
| Hirbodan |
| Hirbodan EPC Co. |
| Ilam Gas Refinery |
| Imen Taksa |
| Iran Afshan Cable |
| Iran Gas & water Development Co. |
| Iran Industrial Network Development (IIND) |
| Iran International General Contractor Co. (IGC) |
| Iran Itok |
| Iran Marine Industrial Co. (SADRA) |
| Iran Ministry of Defence – Fajr Industrial |
| Iran Shipbuilding & Offshore Industries Complex Co. (ISOICO) |
| Iranian offshore Engineering & Construction Co. (IOEC) |
| Iranian Offshore Oil Company (IOOC) |
| Iranian Oil Terminal Co. (IOTC) |
| Isaco |
| Islamic Republic of Iran Railway |
| ISOICO & SAFF |
| Jahanpars Engineering and Construction & DRG Oil |
| Jahad Nasr Kerman Co. |
| Jondishapoor |
| Kamyaran Pardazesh |
| Keyson Co. |
| Khotut Lule Mokhaberat – IOPTC |
| Kish Petroleum Engineering (KPE) |
| M/S PAYSSA Construction Co. |
| Mahdin Industrial |
| Malayer Industrial Factiries |
| Malek Ashtar |
| Mashinsazi Arak |
| Mashinsazi Tasha |
| Mazandaran Electrical |
| Middle East Energy Development Co. (Reperenting ICOFC) |
| Park Sanati Liya – Tazh Co. |
| MTS Toos |
| Naft Saze Qeshm Co. |
| Naft Saze Qeshm Co. & Saff Rosmond |
| Nardis Co. |
| NASR Consortium |
| National Iranian Drilling Co. (NIDC) |
| National Iranian Oil Engoneering Co. (NIOEC) |
| Negah |
| Nik |
| Niro Nik Pardaz |
| Oceanic Marine Contractor OMC Ship Management |
| Oil Industrial Engineering & Construction (OIEC) |
| Oil Industry Drilling Services Co. |
| Omid Seyr Iranian |
| Omran Joosh e Sabalan |
| Original Mehr |
| Pars Ampul |
| Pazhan Sanat Company |
| Petro Barasan |
| Petro Omid Asia Co. |
| Petro Sina Arya Co. |
| Petrochemical Industrial Development Management Co. (PIDEMCO) |
| Petroleum Indutrial Research & Enginnering Co. |
| Petropars & StatoilHydro |
| Petropars Aria Kish Operation (POMC) |
| Petropars Co. |
| Petropars Iran Co. |
| Petrosazan Energy |
| Petrpleum Engineering & Development Co. (PEDEC) |
| PIDECO |
| PIDECO/Tabdil Emergy Paya/Paravar |
| Poolad Pichkar |
| PTK |
| Qazvin Gas |
| Rahavard Zoob |
| Reactorsaz |
| SAFF Co. |
| SAFF ROSMOND Engineering & Management Co. |
| Sanayeh Darya Fan Qeshm Co. (SADAF) |
| Sanayeh Daryaee Iran (SADRA) |
| Sekaf |
| Sepehr Rosmond Engineering & Construction Co. |
| Sepehr Danesh pooya |
| Shams Mashin afzar |
| Shiraz Petrochemical |
| Sinopec |
| Soofiyan Siman |
| SPEC |
| STATOIL SP Gas AS |
| Tabdil Energy Paya Co. |
| Taghtiaran Co. |
| Tamkar |
| Tasdid Offshore Development Co. (TASDID) |
| Tehran Berkeley |
| Tehran Jonoob |
| Tehran Wastewater |
| Tehran Water & Wastewater |
| Toss’e Petroiran Kish Co. |
| Vet Co. |
| Zir-Asas Tec & Cons Co |
| Zolal Iran Co. |
