Kirkland & Ellis was the top legal adviser for oil and gas sector mergers and acquisitions (M&A) in 2025, both in terms of deal value and volume, based on a league table from data analytics company GlobalData. According to GlobalData’s Financial Deals Database, Kirkland & Ellis advised on 51 deals valued at $81.9bn, securing its position at the forefront of M&A legal advice within the industry. Find out moreIn terms of deal value, Latham & Watkins followed Kirkland & Ellis with $78.4bn in advised deals. A dedicated team of analysts monitors all these sources to gather in-depth details for each deal, including adviser names. To ensure further robustness of the data, the company also seeks submissions of deals from leading advisers.