Ryan Maierson advises companies on M&A, capital markets, and SPAC transactions. He serves as a member of the firm’s Executive Committee and previously served as Global Chair of Latham’s Public Company Representation Practice, Co-Chair of the firm’s ESG Task Force, and Chair of the firm’s Houston Corporate Department.

Mr. Maierson regularly guides public and private companies across industries — with a particular focus on energy, energy transition, and related technologies — on transactions including:

  • Mergers and acquisitions
  • IPOs and other securities offerings
  • DeSPAC merger transactions

Mr. Maierson brings more than 25 years of extensive deal-making experience and a broad perspective to his transactional advice. He forges long-term relationships with clients to advance their business objectives while helping them navigate corporate-governance compliance and other public-company requirements. 

He has garnered recognition from industry-leading publications, including Law360, Texas Best Lawyers, The Legal 500 US, Chambers USA, The Best Lawyers in America, Who’s Who Legal, and Texas Super Lawyers. Mr. Maierson was ranked the #1 Public Company M&A Legal Advisor by Deal Count for 2021 and 2023, and #3 Public Company M&A Legal Adviser by Deal Count for 2022, according to Deal Point Data.

Mr. Maierson, a native Houstonian, is a recognized thought leader with particular skill at distilling complex concepts into commercially responsive advice. He serves as an adjunct professor at the University of Houston Law Center, where he has co-taught “Doing Deals” — a course on M&A practice — since 2008.

Mr. Maierson’s representative experience includes advising:


  • Consolidated Communications, a provider of fiber communications solutions, in its US$3.1 billion take-private sale to Searchlight Capital Partners and British Columbia Investment Management Corporation
  • Magellan Midstream Partners in its US$18.8 billion merger with ONEOK, Inc.
  • IncitecPivot Limited in the US$1.68 billion sale of its ammonia manufacturing facility located in Waggaman, Louisiana, to CF Industries Holdings, Inc. and a subsequent long-term ammonia offtake agreement with CF Industries
  • Centennial Resource Development in its US$7 billion merger with Colgate Energy Partners III to create the largest pure-play E&P company in the Delaware Basin
  • TotalEnergies in its US$2.4 billion:
    • Acquisition of half of Global Infrastructure Partners’s interest in Clearway Group
    • Sale of half of TotalEnergies’ interest in SunPower Corp.
  • Quanta Services in its US$2.7 billion acquisition of Blattner Energy, one of the largest utility-scale renewable energy infrastructure solutions providers in North America
  • Sasol in its US$2 billion sale of a 50% stake in Lake Charles Chemical Plant to form a joint venture with LyondellBasell, a multinational chemical company
  • Chevron in its acquisition of Noble Midstream Partners in a master limited partnership take-private transaction
  • UGI in its US$5.375 billion acquisition of the remaining 74% stake in Amerigas, a retail propane distributor
  • Equitrans Midstream in its US$1.8 billion:
    • Acquisition of EQM Midstream Partners
    • Share buyback from EQT
    • Gas gathering and compression agreement with EQT
  • IPSCO Tubulars, a producer of seamless and welded oil country tubular goods, in its US$1.02 billion sale to Tenaris 
  • Shell Midstream Partners’ conflicts committee in the company’s US$4.4 billion acquisition of Royal Dutch Shell’s interest in Mattox Pipeline and certain logistics assets at the Shell Norco Manufacturing Complex 
  • TotalEnergies in its US$250 million acquisition of SunPower’s Commercial & Industrial Solutions Business

Capital Markets

  • EQM Midstream Partners in its US$1.9 billion guaranteed notes offer and US$350 million tender offer
  • TechnipFMC in its US$1 billion senior notes offering
  • Total Capital International in its US$2.5 billion guaranteed notes offer
  • UGI International in its €400 million senior notes offering
  • Issuers and underwriters in dozens of initial public offerings, including for:
    • ProPetro Holding
    • Smart Sand
    • Solaris Oilfield Infrastructure
    • Antero Midstream GP
    • Emerge Energy Services
    • Penntex Midstream Partners
    • Antero Resources
    • Enable Midstream
    • Cypress Energy Partners
    • JP Energy Partners
    • Southcross Energy Partners

SPAC Mergers

  • Desktop Metal, a company that designs and markets 3D printing systems, in its US$2.5 billion merger with Trine Acquisition Corp.
  • ECP Environmental Growth Opportunities in its business combination with Fast Radius, a cloud manufacturing company
  • Harley-Davidson in LiveWire’s US$1.77 billion deSPAC merger with AEA-Bridges Impact Corp., making LiveWire the first publicly traded electric vehicle motorcycle company in the US
  • ironSource, an Israeli mobile marketing company, in its US$11.1 billion deSPAC merger with Thoma Bravo Advantage
  • Joby Aviation, a company developing all-electric aircraft for aerial ridesharing, in its US$4.5 billion business combination with Reinvent Technology Partners 
  • ReNew Power in its US$8 billion deSPAC merger with RMG Acquisition Corporation II, India’s largest deSPAC to date, to create India’s biggest publicly traded renewable energy company by total generation capacity
  • Tritium, a developer and manufacturer of direct-current fast chargers for electric vehicles, in its US$1.2 billion deSPAC merger with Decarbonization Plus Acquisition Corp. II to become a publicly traded company
  • Wallbox, a leading provider of electric vehicle charging solutions, in its US$1.5 billion deSPAC merger with Kensington Capital Acquisition Corp. II

Bar Qualification

  • Texas


  • JD, University of Texas School of Law, 1996
    Order of the Coif, with honors
  • BS, Wharton School, University of Pennsylvania, 1992
    magna cum laude
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September 25, 2023 Recognition

2023 M&A Texas Deal-Lawyer Rankings

Texas Lawbook lists Latham lawyers among the most prolific dealmakers in the state through the first eight months of 2023.