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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

Experience Highlights

  • Buckeye Partners and Nala Renewables in their acquisition of a majority interest in Swift Current Energy, a leading North American clean energy development and investment platform with a pipeline of over 6 GW of solar, wind and energy storage projects

  • 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 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
  • Chambers USA, Energy: Oil & Gas (Transactional) (Nationwide), 2021; “Up and Coming” in Energy: Oil & Gas (Transactional) (Nationwide), 2021
  • 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., Energy: Transactions – Oil & Gas, 2019–2021, “Rising Star,” 2019, “Next Generation Lawyer,” 2020, “Next Generation Partner,” 2021; Energy: Renewable/Alternative Power, 2020 and 2021, ” Next Generation Lawyer,” 2020, “Next Generation Partner,” 2021; Energy: Transactions: Conventional Power, 2021
  • Expert Guides, “Rising Star”  in Energy and Natural Resources, 2020
  • IFLR1000, 2020 and 2021
  • The Best Lawyers in America® (BL Rankings, LLC), Energy Law (Houston), 2022
  • Founding Member: Texas Energy Law Association
  • Texas
  • Arkansas
  • “Recent Trends in Oil & Gas Mergers and Acquisitions,” Rocky Mountain Mineral Law Foundation, April 14, 2021 (speaker)
  • “Kayo Womens Energy Summit,” April 16, 2019 (speaker)
  • “Recent Trends in Renewable Energy Dealmaking,” Energy Series, V&E Houston Office, November 7, 2018 (speaker)