ArcLight Acquires 50% Stake in Invenergy's 5.4 GW IATP Power Portfolio
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Boston – September 30, 2026 -- ArcLight Capital Partners has completed the acquisition of a 50% stake in IATP, a 5.4 GW power portfolio spanning 11 infrastructure assets across North America, with Invenergy retaining the remaining 50% ownership and continuing to operate the platform.
Portfolio combines contracted revenue with dispatchable generation for AI-driven demand
IATP pairs a substantial base of existing contracted revenue with near-term recontracting opportunities and potential expansion projects, targeting electricity demand growth from AI, data centers and broader economic electrification. The portfolio includes four combined-cycle facilities: Grays Harbor Energy Center in Washington, Nelson Energy Center in Illinois, Lackawanna Energy Center in Pennsylvania, and St. Clair Energy Centre in Ontario.