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Danielle Mangrum Patterson
Danielle Mangrum Patterson
Partner — Energy Transactions & Projects
Partner — Energy Transactions & Projects

Danielle Mangrum Patterson

Danielle Mangrum Patterson

1001 Fannin Street
Suite 2500
Houston, TX 77002

start quote symbolI work hard to find the specific right answers for my clients, and I think they appreciate my ability to separate the signal from the noise in a given situation. This is especially true in the energy industry, which is endlessly dynamic, from upstream oil and gas to renewables.end quote symbol
Danielle Mangrum Patterson

Danielle’s practice focuses exclusively in the energy and infrastructure industries, but across a broad spectrum of sectors, including the upstream and midstream oil and gas and renewable power sectors. In particular, she represents clients in mergers and acquisitions, private equity investments, joint ventures and project development transactions. Danielle has advised all players in the energy industry, including strategic companies, institutional investors, private equity funds and other financial institutions.

In 2020, Danielle was selected by Legal 500 as a Next Generation Lawyer in Energy – Renewable/Alternative Power and Energy – Transactions – Oil and Gas. Danielle was also selected to the “Texas Rising Stars List: Super Lawyers” by Thomson Reuters in 2019 and 2020.

Experience Highlights

  • Takkion Holdings, a portfolio company of funds managed by affiliates of Apollo Global Management, in connection with its acquisition of Renew Energy, a leading provider of operations and maintenance solutions serving the renewable energy market

  • Apollo Global Management in the formation of a joint venture with Altius Minerals Corporation’s subsidiary, Altius Renewable Royalties (“Altius”), to accelerate the growth of Great Bay Renewables, the US-based operating subsidiary of Altius and a leading provider of renewable energy development capital in North America

  • The Carlyle Group (NASDAQ: CG) and its Renewable and Sustainable Energy Fund, through its affiliate Acadia Renewable Energy, in the acquisition of a portfolio of eight solar projects in Maine from BNRG representing over $130 million of capital investment

  • Antero Resources Corporation in the $220 million sale of a volumetric production payment, covering dry gas producing properties in West Virginia, to an affiliate of J.P. Morgan

  • Momentum Midstream in the sale of a gathering system and gathering pipeline in the Haynesville shale of Louisiana owned by Momentum and Indigo Natural Resources to DTE Midstream for $2.25 billion in cash, plus a $400 million milestone payment upon completion of the gathering pipeline

  • EagleClaw Midstream Ventures, a portfolio company of Blackstone Energy Partners, in a joint venture with Kinder Morgan Texas Pipeline, a subsidiary of Kinder Morgan, to construct and own the approximately $2 billion Permian Highway Pipeline Project

  • Flywheel Energy Operating, a portfolio company of funds managed by Kayne Anderson Capital Advisors, in its $1.86 billion acquisition of all Fayetteville Shale and ARKOMA upstream and midstream assets of Southwestern Energy Company via the acquisition of 100% of the issued and outstanding securities in SWN Production (Arkansas), LLC and DeSoto Gathering Company, LLC

  • Magnolia Oil & Gas Corporation (formerly TPG Pace Energy Holdings Corp.) in its acquisition from certain funds managed by EnerVest, Ltd. of oil and gas assets within EnerVest’s South Texas Division for approximately $2.66 billion in cash and stock  

  • Caerus Oil and Gas, LLC in its $735 million acquisition of natural gas assets in Northwestern Colorado from Encana Corporation

  • Goldman Sachs Renewable Power Fund in its acquisition of a 142 MW portfolio of solar power generation assets from a subsidiary of Macquarie Infrastructure Corporation

  • Private equity fund in its approximately $1 billion back-levered acquisition (by way of joint venture) of a portfolio of wind and solar assets from a global conglomerate

  • Goldman Sachs Renewable Power Fund in its investment in a solar portfolio

  • Tyr Energy, an Itochu Corporation, in its $500 million joint equity investment in the 845 MW Shepherds Flat wind power generation project in Eastern Oregon, currently the largest wind farm in the world

  • Mubadala Development Company in connection with its potential acquisition of multiple commercial solar projects located across six different U.S. states

  • Riverstone Holdings in its $400 million acquisition of three coal-fired generating plants located in Maryland from a subsidiary of Exelon Corporation 

  • A private equity fund in a $100 million acquisition of a portfolio of solar assets from a major utility 

  • Takkion Holdings, a subsidiary of funds managed by affiliates of Apollo Global Management, in connection with the acquisition of a majority interest in Transportation Partners & Logistics, a leading provider of logistics, transportation, and supply chain management solutions serving renewable energy and industrial markets

  • Sixth Street Partners in multiple acquisitions of wind assets and solar assets

  • Brigham Resources in the $2.55 billion cash and stock sale of all of its leasehold interests and related assets to Diamondback Energy

  • Concho Resources in its $1.625 billion acquisition of oil and gas assets from Reliance Energy

  • Chisholm Energy Holding on the acquisition of its first asset located in New Mexico 

  • Quantum Energy Partners in its $1 billion equity commitment to LINN Energy to fund future oil and natural gas acquisitions and development on those acquired assets

  • Antero Resources in its purchase from Southwestern Energy Company of oil and gas assets in West Virginia for $450 million 

  • Antero Midstream Partners LP in its formation of a joint venture to develop processing and fractionation assets in Appalachia with MarkWest Energy Partners L.P., a wholly owned subsidiary of MPLX

  • Energy Transfer Partners, L.P. in connection with a 50/50 joint venture with Enterprise Products Partners, L.P. to resume service on the Old Ocean natural gas pipeline 

  • Various leading midstream companies in the formation of joint ventures for the construction of multi-billion dollar pipeline projects 

  • Special Committee of Antero Resources Corporation in the $1.05 billion drop down of its integrated water business to Antero Midstream Partners


  • The University of Texas School of Law, J.D. with honors, 2010 (Editor in Chief, Texas Journal of Oil, Gas, and Energy Law)
  • St. Edward’s University, B.B.A. summa cum laude, Economics, 2007
  • Legal Media Group’s (Euromoney’s) Rising Star, 2017
  • Selected to the Texas Rising Stars list, Super Lawyers (Thomson Reuters), 2019 and 2020
  • Legal 500 U.S., “Rising Star” in Energy: Transactions – Oil & Gas, 2019; Energy: Transactions – Oil & Gas, 2020; Energy: Renewable/Alternative Power, 2020
  • Expert Guides, “Rising Star”  in Energy and Natural Resources, 2020
  • IFLR1000, 2020
  • Founding Member: Texas Energy Law Association
  • Texas
  • Arkansas
  • “Kayo Womens Energy Summit,” April 16, 2019 (speaker)
  • “Recent Trends in Renewable Energy Dealmaking,” Energy Series, V&E Houston Office, November 7, 2018 (speaker)