What is the richest gas company?

Could you please elaborate on the topic of the richest gas company? Are we referring to a specific region, such as North America or Europe, or are we looking at a global scale? Is this inquiry based on revenue, market capitalization, or another metric? Additionally, are there any particular companies that have recently gained significant attention or have a reputation for being financially successful in the gas industry? It would be insightful to understand the criteria used to determine the 'richest' gas company and any notable trends or developments in the sector.