Gibson, Dunn & Crutcher and Latham & Watkins were the top legal advisers in the power sector mergers and acquisitions (M&A) space in 2025 in terms of value and volume, respectively, based on a league table from data analytics company GlobalData.

According to GlobalData’s Financial Deals Database, Gibson, Dunn & Crutcher secured the top position in terms of deal value, advising on transactions worth $66.6bn.

Kirkland & Ellis secured the second spot for transaction value, having advised on deals totalling $56.3bn.

It was followed by White & Case with $53.5bn, Skadden, Arps, Slate, Meagher & Flom with $47.3bn, and Latham & Watkins with $26.6bn.

In terms of deal volume, Latham & Watkins led the table, advising on a total of 42 transactions.

Kirkland & Ellis ranked second with 35 transactions, followed by CMS with 32, White & Case with 29 and Dentons with 28 deals.

GlobalData lead analyst Aurojyoti Bose said: “Latham & Watkins not only led by volume but also advised on some of the big-ticket deals announced in the power sector during 2025, which helped it occupy the fifth position by value as well.

“The US multinational law firm advised on six billion-dollar deals that also included a megadeal valued at more than $10bn.

“Meanwhile, Gibson, Dunn & Crutcher also advised on six billion-dollar deals, of which three were megadeals that helped it top the league table by value in 2025.”

GlobalData’s league tables are based on the real-time tracking of thousands of company websites, advisory firm websites and other reliable sources available in the secondary domain. 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.