Private Equity Firm Energy

First Reserve

Stamford, Connecticut, United States

Founded in 1983, First Reserve is a global private equity firm investing across energy, utility, and industrial markets.

Focus Areas
Energy, Utility, Industrial infrastructure

Selective recent acquisition history

Updated September 2026

Infrastructure services and equipment

First Reserve's selected transactions cover grid equipment, engineering services and fuel infrastructure. Portfolio-company purchases remain identified as such.

  1. Lindsey Systems

    First Reserve completed a majority investment in Lindsey Systems, adding engineered products for electrical grid infrastructure.

    First Reserve

  2. WGI

    Transaction lender Monroe reported supporting First Reserve's acquisition of engineering and professional services firm WGI.

    Business Wire

  3. Island Energy Services

    First Reserve and Fortress-affiliated funds agreed to acquire a majority stake in Hawaii fuel infrastructure provider Island Energy Services.

    PR Newswire

  4. Auge Industrial Fasteners

    First Reserve portfolio company Lamons acquired Auge Industrial Fasteners, adding specialized fastening products.

    First Reserve

Selected public announcements through September 19, 2026. Dates and deal status follow each source. This is not a complete acquisition list or confirmation that every announced agreement closed.

Frequently asked questions

What recent acquisitions has First Reserve made?

First Reserve completed a majority investment in Lindsey Systems, adding engineered products for electrical grid infrastructure. Transaction lender Monroe reported supporting First Reserve's acquisition of engineering and professional services firm WGI. First Reserve and Fortress-affiliated funds agreed to acquire a majority stake in Hawaii fuel infrastructure provider Island Energy Services. See the dated sources above for each record.

What acquisition themes appear in First Reserve’s history?

First Reserve's selected transactions cover grid equipment, engineering services and fuel infrastructure. Portfolio-company purchases remain identified as such. These are patterns in the selected records, not a confirmed current acquisition mandate.

Which First Reserve deal supports electrical grid infrastructure?

Lindsey Systems supplies engineered solutions for transmission and distribution networks and other power facilities. The announcement places it within First Reserve's infrastructure solutions investment strategy.

Who are the investors in the Island Energy agreement?

The agreement names a partnership between First Reserve and Fortress-affiliated funds. It also states that the existing One Rock affiliate would remain an investor.

Related Acquisition Pages

Infrastructure Buyers & Acquisitions 4 tracked deals by First Reserve. Manufacturing Buyers & Acquisitions 2 tracked deals by First Reserve. Energy Buyers & Acquisitions 1 tracked deal by First Reserve. Engineering Services Buyers & Acquisitions 1 tracked deal by First Reserve. Acquisitions in Florida 4 tracked deals by First Reserve. Acquisitions in Texas 3 tracked deals by First Reserve. Acquisitions in California 1 tracked deal by First Reserve. Acquisitions in Hawaii 1 tracked deal by First Reserve.

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