DALLAS, July 15 –Aethon Energy Management LLC (“Aethon”) today announced that it has successfully completed the previously announced sale of 100% of the equity interests of Aethon United LP and Aethon III LLC, as well as certain other related operational, production and midstream entities and interests (“the Aethon Fund II and Fund III Assets”), to Mitsubishi Corporation (“Mitsubishi”). The transaction represents a complete sale for all Aethon United and Aethon III limited partners, and is Mitsubishi’s largest-ever acquisition.
In connection with the transaction closing, operation of the Aethon Fund II and Fund III Assets has transitioned to Adamas Energy (“Adamas”), a newly formed, standalone operating entity and wholly owned subsidiary of Mitsubishi, with Gordon Huddleston serving as President and Chief Executive Officer of Adamas.
Aethon will continue to operate as a private investment firm and owner-operator, executing its investment strategy of identifying and developing asymmetric opportunities in oil and natural gas assets and sustainable energy solutions. This also includes potential commercial opportunities across energy and next-generation infrastructure projects with Mitsubishi through the Global Strategic Alliance established in January 2026.
As previously announced, Aethon also intends to acquire a 25% non-operated working interest in the assets sold to Mitsubishi. Any such acquisition would be subject to customary conditions, including the availability of financing and receipt of required regulatory approvals, as well as the satisfaction of applicable conditions, and there can be no assurance that any such right will be exercised.
Gordon Huddleston said, “This transaction represents the culmination of years of disciplined execution and strategic investment. I look forward to leading the Adamas team as we deliver value for Mitsubishi through our world-class natural gas business.”
“Aethon is pleased to continue our partnership with Mitsubishi through our Global Strategic Alliance and we look forward to exploring new opportunities together. With our experienced team, significant investment capacity and proven approach to value creation, we believe Aethon is well positioned to pursue a wide range of compelling opportunities across energy and infrastructure,” he added.
As the largest privately held natural gas platform in the Haynesville Shale and North America, the Aethon Fund II and Fund III Assets are emblematic of the firm’s unique long-term, operations-focused approach to building integrated energy platforms. The sale builds on Aethon’s 35-year track record as a leading private investor in energy and infrastructure.
Aethon Founder Albert Huddleston said, “Today marks a significant milestone in Aethon’s 35-year history and reflects our exceptional work in building a premier natural gas platform. I am grateful for our team and their efforts as we developed, integrated and operated the largest privately held natural gas business in North America.”
Limited partners Ontario Teachers’ Pension Plan and RedBird Capital Partners also discussed the transaction.
“This transaction culminates a long-standing partnership with Aethon,” said Blake Sumler, Senior Managing Director, Portfolio Strategy, Private Capital, at Ontario Teachers’ Pension Plan. “Together, we built and scaled a high-quality energy platform anchored by premium assets. The sale delivers meaningful value creation for our members, and we wish Aethon continued success in its next chapter.”
“Together with Ontario Teachers’ Pension Plan and the Huddleston family, we created the largest privately-held natural gas producer in the U.S., delivering outstanding returns for our investors. This transaction is an important milestone for the company, and we wish management tremendous success as they enter their next phase of growth,” said a RedBird spokesperson.
In addition to his role as President and CEO of Adamas, Gordon Huddleston will continue to lead Aethon as Managing Partner. Entering the next phase of its evolution, Aethon has also appointed Matthew Cain as Partner and Chief Financial Officer, and Colby Swain as Partner.