ArcLight Capital Partners has agreed to acquire InfraBridge’s 50% stake in Invenergy AMPCI Thermal Power (IATP), a large-scale portfolio of power infrastructure assets across North America.
The portfolio includes 11 power infrastructure facilities across several markets in the United States and Canada. The assets feature highly efficient combined-cycle power plants including the Grays Harbor Energy Center in Washington, Nelson Energy Center in Illinois, Lackawanna Energy Center in Pennsylvania and the St. Clair Energy Centre in Ontario. The portfolio is jointly owned with Invenergy, which will retain its existing ownership interest and continue operating the facilities.
The portfolio represents approximately 5.4 gigawatts of generation capacity and supplies contracted power across seven markets. The companies said the transaction underscores the importance of reliable electricity infrastructure as demand grows due to electrification and the rapid expansion of artificial intelligence data centers.
Financial terms of the transaction were not disclosed. The deal remains subject to regulatory approvals and other customary closing conditions and is expected to close in the second half of 2026.
InfraBridge, a division of DigitalBridge Group, manages infrastructure investments focused on sectors including digital infrastructure, transport, logistics and energy transition assets. ArcLight, founded in 2001, invests in power, renewable energy and other electrification infrastructure and has owned, controlled or operated more than 65 gigawatts of assets and roughly 47,000 miles of electric and gas transmission and storage infrastructure representing about $80 billion of enterprise value.
Financial advisors on the transaction include BofA Securities for InfraBridge and Morgan Stanley for ArcLight.
KEY QUOTES:
“This transaction reflects InfraBridge’s disciplined investment approach and our continued focus on delivering strong outcomes for our investors. We are proud of our longstanding partnership with Invenergy and the performance of the IATP portfolio. ArcLight brings deep experience across North American power markets, and we are confident the business is well-positioned for its next phase of ownership.”
Sadiq Malik, Managing Director at DigitalBridge and Co-Head of InfraBridge
“IATP is a unique, diversified, large scale portfolio of contracted power infrastructure assets which provides significant, low cost power across seven markets. We look forward to working with Invenergy, to help drive value from the portfolio and continue to provide grid reliability and resources.”
Andrew Brannan, Managing Director at ArcLight
“We believe that strategic power portfolios like IATP, which provide significant capacity, reliability and grid infrastructure across North America, will play an increasingly critical role in helping to meet the power demand needs driven by AI and electrification.”
Angelo Acconcia, President of ArcLight
