First Reserve
Overview
First Reserve is a global private equity firm founded in 1983 that is exclusively focused on investing across the energy, utility, and industrial markets. Since its inception, the firm has raised over $34 billion of aggregate capital and has completed over 750 transactions, including platform investments and add-on acquisitions. The firm's investment strategy covers areas such as infrastructure solutions, specialty services, and engineered products. It has offices in Stamford, CT, and Houston, TX.
Portfolio Companies
15
Website
firstreserve.comInvestments
| Company | Date | Stage | Lead |
|---|---|---|---|
| acteon group | Nov 2006 | Private Equity | Lead |
| Venterra Group | Dec 2025 | VC Round | Co-investor |
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Sector & Stage Mix
Industry, funding stage, and valuation band breakdowns.
FAQ
Where is First Reserve based?
First Reserve is headquartered in Stamford, Connecticut, United States.
When was First Reserve founded?
Founding year information for First Reserve is not publicly available.
How many portfolio companies does First Reserve have?
First Reserve has 15 portfolio companies in Caplight's dataset.
What are some companies in First Reserve's portfolio?
Portfolio companies visible on Caplight include acteon group, Venterra Group.
What was First Reserve's most recent investment shown here?
First Reserve's most recent investment in this portfolio sample was in Venterra Group in 2025.
What sectors does First Reserve focus on?
First Reserve focuses on Energy & Sustainability, Energy & Sustainability, Energy & Sustainability, Energy & Sustainability, Energy & Sustainability, Energy & Sustainability, Energy & Sustainability, Energy & Sustainability, Energy & Sustainability, Energy & Sustainability, Energy & Sustainability, Energy & Sustainability, Energy & Sustainability, Frontier & Industrial Tech, Frontier & Industrial Tech, Energy & Sustainability, Real Estate & PropTech, FinTech, Frontier & Industrial Tech, Frontier & Industrial Tech, Frontier & Industrial Tech, Frontier & Industrial Tech, Frontier & Industrial Tech, Frontier & Industrial Tech, Telecommunications & Networking, Frontier & Industrial Tech.
What company stages does First Reserve focus on?
First Reserve typically invests at the Late stage.
What is First Reserve's AUM?
First Reserve's assets under management are estimated between $5.8B and $32.0B.