1. Saudi Arabian Oil Co. (Saudi Aramco).
2. China Petroleum & Chemical Corp.
3. Metro China Co. Ltd. (PACY).
9. Marathon Petroleum Corp. (MPC).
10. Valery Energy Corp. (VLF).
Valery is the world's largest independent oil refinery and the world's second-largest producer of renewable fuels. Valery is home to 15 refineries in the US, Canada, and the UK and 33 wind turbines in the United States.
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