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.

MONTREAL – – November 02, 2026 --

PSP Investments has completed the sale of FirstLight's U.S. operations, a portfolio of about 1.4 GW of installed capacity, to Hull Street Energy. It keeps the Canadian business, which now operates as Caelo Energy.

The buyer, Hull Street Energy, is a private equity firm focused on power infrastructure and energy transition investments. The sale includes the FirstLight brand. The U.S. assets span hydroelectric generation, energy storage and other clean energy in Massachusetts, Connecticut and Pennsylvania.