Mitsubishi acquires $7.5 bn of U.S. natural gas assets from Aethon

Mitsubishi Corporation completed its largest ever acquisition, buying the assets of Dallas‑based Aethon Energy for $7.5 billion. The deal makes Mitsubishi one of the biggest natural‑gas producers in the United States, adding fields in the Haynesville Shale that span northern Louisiana and eastern Texas. The purchase, which includes $2.3 billion of debt, was finalized on July 15 and was structured through Mitsubishi’s Dallas subsidiary, Adamas Energy. Aethon will retain a 25 % stake in Adamas and its managing director, Gordon Huddleston, will serve as CEO, representing Mitsubishi’s interests.

The acquisition positions Mitsubishi to profit from rising U.S. gas exports—particularly to Japan, the world’s second‑largest LNG importer—and from the growing demand for gas‑fired power by AI data centers. It follows a broader trend of Japanese firms increasing stakes in U.S. gas production, joining other Japanese players such as Tokyo Gas, Osaka Gas, JERA and JAPEX that have invested in the Haynesville region. The move is framed as a strategic hedge for energy‑supply diversity amid volatile global gas prices and geopolitical tensions that have boosted U.S. LNG exports.