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Vinson & Elkins LLP

1001 FANNIN STREET, SUITE 2500, HOUSTON, TX 77002-6760, USA
Work +1 713 758 2222
Fax +1 713 758 2346
Austin, Beijing, Dallas, Dubai, Hong Kong, Houston and 10 more

Keith Fullenweider

Work +1 713 758 3838
Vinson & Elkins LLP

Work Department

Mergers, Acquisitions and Buyouts


Keith advises clients in mergers and acquisitions, joint ventures, private equity buyouts, and general corporate and securities matters. Keith has substantial experience with strategic and financial investors in all aspects of the energy and natural resource industries, including power generation, gas and electric utilities, oil and gas exploration and production, renewables and clean energy, energy services, transportation and midstream, and refining. Keith's industry experience also includes chemicals, engineering and construction, manufacturing, and technology. Keith is a member of V&E's Management Committee and heads the firm's M&A/Private Equity practice group.


  • Advisory Director, Catholic Charities of Galveston-Houston
  • Director and Executive Committee Member, The Boys and Girls Club of Greater Houston (Board Chair 2010 - 2011)
  • Former Director, The University of Texas Law School Alumni Association; Kinkaid School Alumni Association, and The Fay School


Keith graduated from Princeton University, A.B. summa cum laude in 1985, and The University of Texas, J.D. with High Honors in 1988 (Fraternities: Chancellors and Order of the Coif). Admitted to Texas Bar in 1988.

United States: Finance

Project finance

Within: Project finance

Vinson & Elkins LLP leads the way in advising sponsors and equity investors on the financing of major oil and gas projects; Washington DC-based Katy Gottsponer is acting for AES and the Motta Group on the $535m project financing of the Colón LNG-to-power project, and Keith Fullenweider, New York-based David Wicklund, Mark Brasher and Dallas-based John Grand are all part of a team assisting Blackstone Energy Partners and Blackstone Capital Partners with its $1.6bn investment in the Rover pipeline in the US. The practice is also well versed in handling infrastructure work, and in one example Kaam Sahely and Mark Brasher are assisting Texas Central Partners with the finance for a high-speed rail project between Dallas and Houston. In another Texas mandate, the same duo advised Gulf Coast Ammonia on the $800m financing of a hydrogen-based ammonia production facility. John Connally and James Cuclis head the team. All named partners are based in Houston save where stated otherwise.

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United States: Industry focus

Energy transactions: oil and gas

Within: Energy transactions: oil and gas

Vinson & Elkins LLP is noted for its ‘deep bench’ and its impressive private equity following, that includes the likes of Apollo Global Management; corporate head Keith Fullenweider and Bryan Loocke (who is ‘extremely knowledgeable on production sharing agreements’) advised Blackstone Energy on its $2bn acquisition of EagleClaw Midstream Ventures. The broad client base also includes independent oil and gas exploration and production (E&P) companies and master limited partnerships; Fullenweider and Creighton Smith acted for Vantage Energy on its $2.7bn sale to Rice Energy, and practice co-head John Connally and Mark Brazzil assisted Antero Midstream with a joint venture to develop processing and fractionation assets in Appalachia. While the practice is primarily located in Houston, where all lawyers named thus far are based, it also has outlets in New York and Dallas. Houston-based James Cuclis co-heads the team.

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United States: M&A/corporate and commercial

M&A: large deals ($1bn+)

Within: M&A: large deals ($1bn+)

For large-cap energy sector deals, Vinson & Elkins LLP virtually stands alone. It has the client base and extensive senior resources to handle multiple deals at any one time. Primarily split between Houston and New York, the team is praised for its ‘commercial approach’ and ‘ability to drive a process forward’. It is ‘always incredibly responsive and flexible to meet the client’s needs’, ‘shows dedication to getting things over the finish line’ and ‘has a pool of top-quality lawyers to draw from, including at the associate level’. It has particular expertise in the exploration and production space, and has made an additional impression in representing special purpose acquisition companies. Clients include AltaGas, Chisholm Energy, Devon Energy, Huntsman, Jonah Energy, MORSCO, Rice Energy, Southwest Airlines and a number of big-name private equity houses. It advised Sunoco Logistics Partners on its $20bn merger with Transfer Partners, creating one of the largest MLPs in the world. It also advised Rice Energy on its $8.2bn merger with EQT Corporation, creating the largest domestic natural gas producer in the US. Key partners in the team include senior name Keith Fullenweider, Matthew Strock and New York-based James Fox. Stephen Gill and Lande Spottswood are up-and-coming names. Jeffrey Floyd provides ‘sage guidance’ and ‘focuses on the issues that really matter’. Attorneys are based in Houston unless stated otherwise.

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Private equity buyouts

Within: Private equity buyouts

Vinson & Elkins LLP is a market leader in energy sector private equity. The firm’s ‘deep expertise within the energy sector’ has enabled it to attract engagements from the likes of Apollo, Blackstone, Crestview Partners, KKR, Morgan Stanley Private Equity, Oaktree Capital Management, Quantum Energy Partners, Riverstone, TPG and Warburg Pincus. It advised Apollo portfolio company Double Eagle Energy Permian on its $2.8bn sale of undeveloped acreage and producing oil and gas properties in the core of the Midland Basin to Parsley Energy. It also advised Blackstone Energy Partners on its $2bn acquisition of EagleClaw Midstream Ventures from EnCap Flatrock Midstream. Houston-based head of the corporate group Keith Fullenweiderhas an exceptional sense of business judgment for an attorney’ and is ‘consistently able to deliver the full firm’ for clients’ broader needs. Houston partner Matthew Strock and New York managing partner James Fox are also key partners.

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