First Reserve

First Reserve is a private equity and infrastructure investment firm based in Stamford, Connecticut, founded in 1983. The firm specializes in making private equity investments exclusively in the energy sector, focusing on areas such as specialty services, engineered products, and logistics and distribution. As a Registered Investment Adviser, First Reserve aims to provide strategic investment solutions tailored to the unique needs of the energy industry.

Thomas Amburgey

Managing Director

James C. Berner

Managing Director

Edward Bialas

Managing Director

Adi Blum

Managing Director

William R. Brown

Managing Director

R. Donald Ferguson

Director

Wesley Fischer

Vice President

Larry L. Henry

Managing Director

Yuri C. Larrabee

Director

Nick Lednicky

Vice President

Jonathan T. Lee

Vice President

Ryan Nicholson

Vice President

Alex Peters

Associate

Eduard Ruijs

Managing Director

Blake H. Seline

Vice President

Dmitry Serov

Associate

Sukant Sethi

Associate

Carolina Sierra

Director, Technical

Paul Steen

Managing Director

Todd Tomlin

Managing Director and Co Head of Capital Formation

Xian Wang

Associate

Joshua R. Weiner

Co-Founder, Managing Director and Member of Investment Team

Alex Williams

Managing Director

Past deals in Appalachians

Ascent Resources

Venture Round in 2013
Ascent Resources, LLC is an oil and gas exploration and production company based in Oklahoma City, Oklahoma. Founded in 2014, the company focuses on acquiring, developing, and producing natural gas and oil primarily in the Appalachian Basin. Ascent Resources holds approximately 300,000 net acres of land in this region, which is known for its significant potential for shale oil, liquids, and natural gas. The company emphasizes equal employment opportunities for all employees and applicants, promoting a diverse and inclusive workforce.
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