Kuwait Petroleum Corporation operates through a series of specialised subsidiaries in Kuwait and across the world, with activities encompassing all aspects of the hydrocarbon industry. All of these subsidiaries are fully-owned by KPC.

1. Kuwait Oil Company (KOC) www.kockw.com
2. Kuwait National Petroleum Company (KNPC) www.knpc.com.kw
3. Petrochemical Industries Company http://www.pic.com.kw/
4. Kuwait Oil Tanker Company http://www.kotc.com.kw/
5. Kuwait Aviation Fuelling Company http://www.kafco.com.kw/
6. Kuwait Foreign Petroleum Exploration Company http://www.kufpec.com/
7. Kuwait Petroleum International http://www.q8.com/
8. Kuwait Gulf Oil Company http://www.kgoc.com/
9. Oil Services Company http://www.ossc.com.kw/
10. Oil Development Company http://www.kuwaitproject.com/