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About First Reserve
First Reserve is a private equity firm founded in 1983. It is primarily based in Stamford, United States. As of Oct 2026, First Reserve is an active investor with a portfolio of 90 companies, comprising 90 funding rounds and 36 acquisitions. In the last 12 months, it has participated in 1 funding round and has made 2 acquisitions. The firm primarily invests in companies based in United States and United Kingdom. Its portfolio is spread across a wide range of sectors from Energy to Mining. Most recently it acquired stakes in Lindsey on Apr 10, 2026.
Overall First Reserve portfolio has seen 22 IPOs and 23 acquisitions, namely Glencore, Vallourec and Abengoa. A lot of funds co-invest with First Reserve, with names like The Energy & Minerals Group sharing a substantial percentage of its portfolio.
First Reserve has a team of 37 people, including 15 partners.
Key Metrics
First Reserve's Portfolio
First Reserve has a portfolio of 90 companies. They have invested in a total of 90 companies. Their most recent investment was in Venterra Group (Series D round) on Dec 22, 2025. Here are the most recent investments by First Reserve:Date | Company | Round | Amount | Co-Investors |
|---|---|---|---|---|
Dec 22, 2025 | Series D | 7547 | ||
Aug 17, 2023 | Series D | 4415 | ||
Feb 18, 2022 | Series C | 8083 | - | |
May 03, 2018 | Unattributed | 2248 | - |
First Reserve has acquired 36 companies. Their most recent acquisition was of Lindsey on Apr 10, 2026. Here are the most recent acquisitions by First Reserve:
Acquisition Date | Company | Short Description | Total Funding | Founded Year |
|---|---|---|---|---|
Apr 10, 2026 | Provider of sensors for distribution line communication systems | - | 1947 | |
Feb 25, 2026 | Design and engineering firm | - | 1972 | |
Jun 02, 2025 | Hawai'i-focused energy company delivering fuel and championing the islands' energy future | - | 2016 | |
Nov 24, 2020 | End-to-end infrastructure solutions provider for utility and telecommunications industries | - | 1906 |
Here is the portfolio snapshot of First Reserve:
Investments by Year
The maximum number of investments were made in 2022
Acquisitions by Year
The maximum number of acquisitions were made in 2019
Portfolio by Location
Companies are primarily in United States and United Kingdom
Portfolio by Sector
Companies are primarily in Energy
Team profile of First Reserve
First Reserve has a team of 37 members including 15 Partners and 2 Principals located in United States and United Kingdom. First Reserve's team sits on the board of 1 company.Here is a list of top team members in First Reserve:
Name | Designation | Location | Board Memberships | Contact Details |
|---|---|---|---|---|
Partner | Houston | - | ||
Partner | Stamford | - | ||
Partner | Houston | - | ||
Partner | Stamford | - | ||
Partner | Houston | - | ||
Partner | Houston | - | - | |
Partner | New York City | - | ||
Partner | Stamford | - | ||
Partner | Houston | - | ||
Partner | London | - | - | |
Partner | New York City | - |
Co-investors of First Reserve
Over the past 43 years, 18 investors have co-invested in First Reserve's portfolio companies.
- Top Co-investors of First Reserve: 18 investors entered a company along with First Reserve. These include investors like The Energy & Minerals Group (2 companies).
First Reserve News
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Trillium Flow Technologies Completes Sale of Select Valves Businesses to FlowservePR Newswire•Jul 01, 2026•First Reserve, Trillium Flow Technologies, Flowserve
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Monroe Capital Supports First Reserve’s Acquisition of WGI, IncBusiness Wire•Feb 25, 2026•WGI, Monroe Capital, First Reserve
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Mason Capital Reasserts Ascent Resources Transactions ConcernsBenzinga•Feb 05, 2026•Ascent Resources, Mason Capital Management, The Energy & Minerals Group, First Reserve
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Venterra secures £40 million in new equity backing to boost offshore wind activitiesWindtech-International•Dec 22, 2025•General Atlantic, First Reserve, Venterra
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One Rock Capital Partners Announces Sale of Majority Stake in Island Energy ServicesBusiness Wire•Jun 02, 2025•One Rock Capital Partners, Island Energy, Fortress, First Reserve
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Trillium Flow Technologies Successfully Completes RefinancingMiningstockeducation•Jan 13, 2025•Trillium Flow Technologies, Blue Owl, First Reserve
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First Reserves Announces Sale of IRISNDT to Apave GroupPR Newswire•Oct 23, 2024•IRISNDT, Apave, First Reserve
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First Reserve Pivots From Big Energy to Embrace Midsize Infrastructure BusinessesThe Wall Street Journal•Sep 10, 2024•First Reserve
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