DEAL ALERT (MITSUBISHI AETHON)
Research/Study
All Standard Disclaimers Apply & Seller Rights Retained

SPECIAL REPORT (JAN 21, 2026)
Mitsubishi Buys Aethon
The Empire Buys Back - Haynesville
$7.5B: $5.2B Cash Plus $2.3B Debt
Now #2 Haynesville, Behind Expand
2.1 Bcfpd Net (2.6 Bcfpd Gross)
~380,000 Net Acres
Mitsubishi's Largest Investment On Record
New Name: Adamas Energy
Albert Huddleston Named CEO
Aethon Mngt Option To Buyback 25%
Japanese Now Control ~30% of Haynesville
Mitsubishi, Tokyo Gas, Osaka, JERA
Mitsui Developing In Western Haynesville
Who's Next?
DOWNLOAD OUR 5-PAGE ALERT
RS 2524DA
Energy Advisors Group (EAG) has issued a Deal Alert, The Empire Buys Back, analyzing Mitsubishi's $7.5 billion Haynesville buy of prized #2 operator Aethon Energy.
The $7.5 billion deal is expected to close by 2Q26 and is paid for with $5.2 billion cash and $2.3 billion in assumed debt.
The deal is Mitsubishi's largest corporate investment on record and brings 2.1 Bcfpd net (2.6 Bcfpd gross) and follows months of talk of who would ultimately buy the Haynesville's #2 producer.
Mitsubishi joins fellow Japanese Haynesville producers Tokyo Gas (1.2 Bcfpd), Osaka Gas (0.6 Bcfpd) and JERA (0.4 Bcfpd) who collectively now control ~30% strategic Haynesville gas supply with infrastructure linked directly to Gulf Coast LNG exports.
Contents and Insights:
------ Deal Stats: $7.5B for 2.1 Bcfpd net (2.6 Bcfpd gross) Haynesville vols with ~360,000 net acres
------ Records Set: Largest Mitsubishi investment on record. Largest pure-play Haynesville deal. Largest Japanese U.S. upstream investment.
------ Aethon Management Buyback: Ontario Teachers' Pension Plan is Aethon's majority owner along with minority stakes by Redbird Capital and Aethon Management. Aethon management is expected to exercise its option to buy back 25% of Aethon and has additional kicker to participate with Mitsubishi in a global alliance.
------ Who's Next: We expect increased U.S. natural gas investment from Japan, South Korea, and maybe Taiwan.
Here are our quick takeaways from our report along w/ three slides.
Quick Quotes:
------- Empire Buys Back. "Mitsubishi is back in America, but not to buy icons or skylines,. It's buying gas...a lot of it."
--------For Mitsubishi. "This is less a comeback than a reinvention. The company that once sought prestige now seeks permanence. Japan, still scarred by Fukushima and overly dependent on imported fuel, needs stable supply."
------- Friendshoring: "These quiet energy buys are a striking contrast to the furor over Nippon Steel’s bid
for U.S. Steel…a deal that provoked howls from the same populists now cheering for LNG exports. When Japan buys resources, it’s partnership. When it buys furnaces, it’s betrayal. Energy investment slots neatly into Washington’s narrative of “friendshoring”; whereas steel apparently still carries too much American mythology to be foreign-owned."
------- Brilliant: "The empire that once bought the symbol of U.S. capitalism has returned to buy its engine. Now, the story isn’t one of rivalry; it’s one of resonance. Both nations have realized that power comes not from what you own on the skyline, but what’s extracted beneath it."
Below are some excerpts from the Deal Alert
Page 1 Deal Highlights --

Page 2 Let's Look at the seller --

Page 5 Why it Matters --

The FULL 5-page report is available for download to the right.
Energy Advisors Group is working hard to expand our thought leadership leveraging our decades of industry expertise. We look forward to providing additional market insight for our clients through Market Monitor, Regional Perspectives, Deal Alerts and Quarterly M&A Outlook.
Our firm has been serving the needs of buyers, sellers and capital providers for over thirty-five years. We stand ready to assist asset owners in a competitive divestment process and to help buyers find off-market strategic assets for their portfolio. Call Rich Martin at 214-744-2495 or email rmartin@energyadvisors.com for a private consultation.
TO LEARN MORE:
Blake Dornak
Vice President
Phone: 713-600-0169
– Email: bdornak@energyadvisors.com
Brian Lidsky
Director-Research & Special Projects
Phone: 713-600-0138
– Email: blidsky@energyadvisors.com
IF YOU NEED ASSISTANCE downloading the full report or creating a login into our platform, contact:
Stephanie Epps
– Email: stephanie@energyadvisors.com
This article is for informational purposes only and not intended as financial advice. Please conduct your own research before investing.

SPECIAL REPORT (JAN 21, 2026)
Mitsubishi Buys Aethon
The Empire Buys Back - Haynesville
$7.5B: $5.2B Cash Plus $2.3B Debt
Now #2 Haynesville, Behind Expand
2.1 Bcfpd Net (2.6 Bcfpd Gross)
~380,000 Net Acres
Mitsubishi's Largest Investment On Record
New Name: Adamas Energy
Albert Huddleston Named CEO
Aethon Mngt Option To Buyback 25%
Japanese Now Control ~30% of Haynesville
Mitsubishi, Tokyo Gas, Osaka, JERA
Mitsui Developing In Western Haynesville
Who's Next?
DOWNLOAD OUR 5-PAGE ALERT
RS 2524DA
Energy Advisors Group (EAG) has issued a Deal Alert, The Empire Buys Back, analyzing Mitsubishi's $7.5 billion Haynesville buy of prized #2 operator Aethon Energy.
The $7.5 billion deal is expected to close by 2Q26 and is paid for with $5.2 billion cash and $2.3 billion in assumed debt.
The deal is Mitsubishi's largest corporate investment on record and brings 2.1 Bcfpd net (2.6 Bcfpd gross) and follows months of talk of who would ultimately buy the Haynesville's #2 producer.
Mitsubishi joins fellow Japanese Haynesville producers Tokyo Gas (1.2 Bcfpd), Osaka Gas (0.6 Bcfpd) and JERA (0.4 Bcfpd) who collectively now control ~30% strategic Haynesville gas supply with infrastructure linked directly to Gulf Coast LNG exports.
Contents and Insights:
------ Deal Stats: $7.5B for 2.1 Bcfpd net (2.6 Bcfpd gross) Haynesville vols with ~360,000 net acres
------ Records Set: Largest Mitsubishi investment on record. Largest pure-play Haynesville deal. Largest Japanese U.S. upstream investment.
------ Aethon Management Buyback: Ontario Teachers' Pension Plan is Aethon's majority owner along with minority stakes by Redbird Capital and Aethon Management. Aethon management is expected to exercise its option to buy back 25% of Aethon and has additional kicker to participate with Mitsubishi in a global alliance.
------ Who's Next: We expect increased U.S. natural gas investment from Japan, South Korea, and maybe Taiwan.
Here are our quick takeaways from our report along w/ three slides.
Quick Quotes:
------- Empire Buys Back. "Mitsubishi is back in America, but not to buy icons or skylines,. It's buying gas...a lot of it."
--------For Mitsubishi. "This is less a comeback than a reinvention. The company that once sought prestige now seeks permanence. Japan, still scarred by Fukushima and overly dependent on imported fuel, needs stable supply."
------- Friendshoring: "These quiet energy buys are a striking contrast to the furor over Nippon Steel’s bid
for U.S. Steel…a deal that provoked howls from the same populists now cheering for LNG exports. When Japan buys resources, it’s partnership. When it buys furnaces, it’s betrayal. Energy investment slots neatly into Washington’s narrative of “friendshoring”; whereas steel apparently still carries too much American mythology to be foreign-owned."
------- Brilliant: "The empire that once bought the symbol of U.S. capitalism has returned to buy its engine. Now, the story isn’t one of rivalry; it’s one of resonance. Both nations have realized that power comes not from what you own on the skyline, but what’s extracted beneath it."
Below are some excerpts from the Deal Alert
Page 1 Deal Highlights --

Page 2 Let's Look at the seller --

Page 5 Why it Matters --

The FULL 5-page report is available for download to the right.
Energy Advisors Group is working hard to expand our thought leadership leveraging our decades of industry expertise. We look forward to providing additional market insight for our clients through Market Monitor, Regional Perspectives, Deal Alerts and Quarterly M&A Outlook.
Our firm has been serving the needs of buyers, sellers and capital providers for over thirty-five years. We stand ready to assist asset owners in a competitive divestment process and to help buyers find off-market strategic assets for their portfolio. Call Rich Martin at 214-744-2495 or email rmartin@energyadvisors.com for a private consultation.
TO LEARN MORE:
Blake Dornak
Vice President
Phone: 713-600-0169
– Email: bdornak@energyadvisors.com
Brian Lidsky
Director-Research & Special Projects
Phone: 713-600-0138
– Email: blidsky@energyadvisors.com
IF YOU NEED ASSISTANCE downloading the full report or creating a login into our platform, contact:
Stephanie Epps
– Email: stephanie@energyadvisors.com
This article is for informational purposes only and not intended as financial advice. Please conduct your own research before investing.




