- Al Falahy Company L.L.C
- Ajuwan Shatti Muscat L.L.C.
- Al Kahrama A Thababi Trading
- Abu Yasser Al Mawly Enterprises LLC
- Abu Omran
- Afaq Al-Musana
- Abu Hilal Trading
- Diamond Rist Enterprises L.L.C
- Exchange United
- Eastern Overseas L.L.C
- Global Corp Enterprises L.L.C
- Happy Day International
- Kllah Al Maladha
- Labaib Trading
- Zawawi Powertech Engg.L.L.C
- Rawabi Bid Bid Contracting & Trading L.L.C
- Rezak Engineering
- Trade links & Services
- United Engineering Projects
- Oman Oil Company Exploration & Production LLC (OOCEP)
- Al Turki Enterprises L.L.C
- Bahwan Engineering Co L.L.C
- BEST Oil & Gas Solution L.L.C
- Daleel Petroleum L.L.C
- Galfar Engg. & Cont. SAOG
- Marmul Falcon Cont. & Trad. Co L.L.C
- MEDCO Energia Oil & Gas
- Occidental of Oman
- Petroleum Development of Oman
- Petrofac E&C Oman L.L.C
- Specialised Technical Services
- STS Tebodin L.L.C
- Worley Parson – Arabian Industries
- Zawawi Powertech Engineering L.L.C.
- OOCEP