ArcLight to Buy Half of InfraBridge’s Stake in Invenergy Power Portfolio

ArcLight Capital Partners has agreed to acquire a 50% interest in InfraBridge’s stake in Invenergy AMPCI Thermal Power (IATP), a portfolio of large-scale power generation assets across North America. 

Under the agreement, Invenergy will retain its ownership stake and continue serving as operator of the platform. Financial terms of the private transaction were not disclosed, and the deal is expected to close in the second half of 2026. 

The IATP portfolio includes 11 power infrastructure assets located across key North American markets. Among them are several highly efficient combined-cycle plants, including the Grays Harbor Energy Center in Washington, the Nelson Energy Center in Illinois, the Lackawanna Energy Center in Pennsylvania, and the St. Clair Energy Centre in Ontario. 

“ArcLight brings deep experience across North American power markets, and we are confident the business is well-positioned for its next phase of ownership,” said Sadiq Malik, Managing Director at DigitalBridge and Co-Head of InfraBridge. 

ArcLight executives highlighted the scale and diversification of the portfolio as key drivers of the investment. 

“IATP is a unique, diversified, large-scale portfolio of contracted power infrastructure assets which provides significant, low-cost power across seven markets,” said Andrew Brannan, Managing Director at ArcLight. 

InfraBridge operates as the infrastructure investment division of DigitalBridge, the global alternative asset manager. ArcLight, meanwhile, has owned, controlled or operated approximately 65 gigawatts of power assets and 47,000 miles of electric and gas transmission and storage infrastructure, representing roughly $80 billion in enterprise value. 

BofA Securities, Inc. is acting as financial advisor to InfraBridge. Morgan Stanley & Co. LLC is acting as financial advisor to ArcLight.