Latham Advises on Aethon’s Sale of Haynesville Business to Mitsubishi

Mitsubishi Corporation (MC) has announced that it will acquire all of the equity interests in Aethon III LLC, Aethon United LP, and related entities and interests (collectively referred to as Aethon). MC reached an agreement on January 15, 2026, with the existing stakeholders, including Ontario Teachers’ Pension Plan, Redbird Capital, and Aethon’s founders, for a total equity investment of approximately US$5.2 billion and the assumption of US$2.33 billion of debt. Latham & Watkins is representing Aethon on the transaction.

Latham & Watkins advised Aethon on the transaction with a corporate deal team led by John Giouroukakis, Clayton Heery, Ryan Maierson, Justin T. Stolte, and James Roberston, with support from Armaan Bhimani and Emily Brown. Advice was also provided on capital markets matters by David Miller; on tax matters by Christine Mainguy, with support from Dominick Constantino; on finance matters by Scott Ollivierre and Stephanie Teicher; on executive compensation, employment, and benefits matters by David Della Rocca and Laura Szarmach; on energy regulatory matters by J. Patrick Nevins; on environmental matters by Joshua Marnitz, with support from Reilly Nelson; on data privacy matters by Robert Brown, with support from Stuart Cobb; on oil and gas matters by associates Nathan Zhang and Brock Jones; on intellectual property matters by associate Andrew Abokhair; on antitrust matters by Jason Cruise, Patrick English, and Ngoc Hulbig with support from Mary Casale and Ethan Hoffman; on Committee on Foreign Investment in the United States (CFIUS) matters by Paul Rosen and Catherine Hein, with support from Monica Calce; and on insurance matters by Harrison White.