Mitsubishi Corp. agreed to acquire all equity in Aethon, a private gas producer in the Haynesville shale straddling Texas and Louisiana, from owners including Ontario Teachers' Pension Plan and RedBird Capital. It pays about $5.2 billion for the equity and takes on roughly $2.33 billion of net debt. Aethon's output averages about 2.1 billion cubic feet a day, equal to around 15 million tonnes a year of LNG. The deal Mitsubishi bought 100% of the equity in two entities, Aethon III LLC and Aethon United LP, which hold the Haynesville business. Japanese press put the equity price at about ¥800 billion and the total, including assumed debt, at about ¥1.2 trillion, the largest acquisition in Mitsubishi's history. When announced on January 16, 2026, closing was expected in the first quarter of Mitsubishi's fiscal year, April to June 2026. It completed slightly later, on July 14, 2026 US time. Latham & Watkins advised Aethon, with its team covering antitrust and CFIUS matters among other areas. After closing The producing business now runs as Adamas Energy, a newly formed, stand-alone operating company wholly owned by Mitsubishi. Gordon Huddleston is its president and chief executive. Aethon Energy Management, founded by Albert Huddleston, is repositioning itself as an energy-focused investment manager. It said it intends to buy back a 25% non-operated working interest in the assets it sold to Mitsubishi, subject to conditions including financing and regulatory approvals. Japanese reports described this as a right for the founding family to repurchase up to 25%. Strategy Mitsubishi described the purchase as its entry into US shale gas across the value chain, from owning production to selling gas inside the US and exporting it. It already holds liquefaction capacity rights at Cameron LNG in Louisiana under a tolling agreement. President Katsuya Nakanishi told reporters the starting point was cost-competitive upstream gas, which would widen the options Mitsubishi can offer buyers in different markets. Japanese coverage also tied the deal to rising US power demand from AI and data centers. Aethon has kept infrastructure such as gas processing in house, which reports cited as a source of its low costs.
