Hull Street Energy signed an agreement in May 2026 to acquire FirstLight USA from the Public Sector Pension Investment Board. The portfolio includes nearly 1,400 MW of clean generation in the Northeast, led by the 1,168 MW Northfield Mountain pumped storage hydro facility in Massachusetts. The deal also includes 14 hydroelectric stations across Connecticut, Massachusetts, and Pennsylvania, plus three operational solar and battery assets.

The core shift in US hydropower M&A is clear: private equity is targeting dispatchable clean infrastructure, not just intermittent renewable capacity. Hull Street is buying operating, grid-critical assets that can support reliability in ISO-NE as thermal retirements tighten reserve margins.

This follows Hull Street’s 2025 agreement to acquire 13 hydroelectric dams from Consumers Energy in Michigan. After both transactions close, the PE-backed power investor will control about 1,200 MW of pumped storage hydro and nearly 400 MW of conventional hydro capacity.

The buyer behavior mirrors a wider Enerdatics signal: private equity is broadening from pure renewable portfolios into integrated power platforms with storage, transmission, and flexible generation exposure. Enerdatics noted that PE investors are increasingly valuing reliability, capacity resilience, and exposure to high-growth load zones over sustainability-only metrics.

Commercially, pumped hydro offers long-duration storage, dispatchability, and scarcity value that lithium-ion BESS cannot fully replicate at multi-hour or overnight duration.

This signals more PE interest in legacy hydro fleets where operational optimization, relicensing expertise, and capacity-market upside can create platform-level value.

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