Oil & gas companies

Surya Esa Perkasa (SEP) is a company that owns and operates liquefied petroleum gas (LPG) refinery.

Seoul City Gas (서울도시가스주) is a company that supplies natural gas to residential, commercial, and industrial customers.

ESI Energy Services is a pipeline equipment rental and sales company.

Spindletop Oil & Gas Co. is a publicly traded company engaged in the exploration, development, and production of crude oil and natural gas in North America.

Hunting is a company that manufactures, trades, and rentals equipment for the energy industry.

United States Lime & Minerals, Inc. ("US Lime") is a public company traded on the NASDAQ Global Market under the symbol USLM and conducts its business through two segments: Lime and Limestone Operations and Natural Gas Interests.

Sanrin (サンリン株式会社) is an oil and gas services and construction company.

Petrofac is a company that designs, builds, and operates energy facilities.

Tellurian (formerly Magellan Petroleum) develops low-cost liquefied natural gas projects.

Berry Petroleum, an independent upstream energy company, engages in the development and production of conventional oil reserves.

Clean Energy is the largest provider of natural gas fuel for transportation in North America.

Surgutneftegas is an oil and gas company.