BETHESDA – – November 02, 2026 -- Hull Street Energy (HSE), a U.S. power-focused investment firm, has completed its acquisition of FirstLight's U.S. platform from the Public Sector Pension Investment Board (PSP Investments), taking control of nearly 1,400 MW of clean generation in the Northeast.

Northfield Mountain anchors the portfolio at 1,168 MW

The largest asset is Northfield Mountain, a 1,168 MW pumped storage hydro project in Massachusetts. The source describes it as the largest energy storage facility in New England.

The portfolio also includes 14 hydroelectric stations across Connecticut, Massachusetts and Pennsylvania, plus three operational solar and battery facilities in the Northeast. The parties did not disclose financial terms.

HSE bets on firm clean resources in the Northeast

Sarah Wright, Founder and Managing Partner of HSE, said the firm sees "tremendous opportunity in the hydro sector." She described hydropower and energy storage as firm, clean resources that will play an increasingly vital role in the region's evolving energy landscape.

Justin Trudell, President and CEO of FirstLight, said he expects to continue leading the business in the Northeast in partnership with HSE.

Two law firms advised the buyer

Troutman Pepper Locke and DLA Piper acted as legal counsel to HSE. The source names no advisers for PSP Investments.