Ryan Maierson advises companies on M&A and capital markets transactions. He previously served as a member of the firm’s Executive Committee, 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.

Ryan 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

Ryan 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.

Ryan was named the 2025 Texas Attorney of the Year by Texas Lawyer and is one of only two lawyers ranked in Band 1 for both Texas M&A and Texas Capital Markets by Chambers USA. He has garnered recognition from industry-leading publications, including Lawdragon, Law360, Texas Best Lawyers, Legal 500 US, Chambers USA, The Best Lawyers in America, Who’s Who Legal, and Texas Super Lawyers. Additionally, Ryan was ranked #1 Energy & Power M&A Lawyers in North America by Deal Count for 2025 according to MergerLinks, and #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.

Ryan, 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.

Ryan’s representative experience includes advising:

M&A

  • SLB in its US$7 billion acquisition of ChampionX Corporation
  • Altus Power in its take-private acquisition by TPG
  • Priority Power, an Ara Partners portfolio company that provides turnkey energy management services, in its acquisition by I Squared Capital
  • Archrock in its US$983 million acquisition of Total Operations and Production Services
  • CenterPoint Energy in the US$1.2 billion sale of its Louisiana and Mississippi natural gas local distribution businesses to Delta Utilities, a portfolio company of Bernhard Capital Partners (pending)
  • Equitrans Midstream in its merger with EQT Corporation to create a US$35 billion combined company (recognized by IJInvestor as the 2024 Oil & Gas Acquisition of the Year)
  • Magellan Midstream Partners in its US$18.8 billion merger with ONEOK, Inc.
  • R.R. Donnelley & Sons Company in its acquisition of Vericast’s digital and print marketing business
  • Desktop Metal in its all-cash acquisition by Nano Dimension
  • Flame Acquisition Corp. in its US$625 million purchase of offshore California oil properties from ExxonMobil to form Sable Offshore Corp.
  • Consolidated Communications in its US$3.1 billion take-private sale to Searchlight Capital Partners and British Columbia Investment Management Corporation
  • IncitecPivot Limited in the US$1.68 billion sale of its ammonia manufacturing facility to CF Industries
  • Centennial Resource Development in its US$7 billion merger with Colgate Energy Partners III to create Permian Resources Development
  • TotalEnergies in its US$2.4 billion:
    • Acquisition of half of Global Infrastructure Partners’ 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
  • Sasol in its US$2 billion sale of a 50% stake in Lake Charles Chemical Plant to form a joint venture with LyondellBasell
  • 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
  • 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

  • Quantinuum on its US$1.68 billion IPO
  • The underwriters on EagleRock Land LLC’s US$320 million IPO
  • Fervo Energy Company on its US$1.89 billion upsized IPO
  • The underwriters on HMH Holding Inc.’s US$210.4 million IPO
  • WhiteHawk Income Corporation on its US$200 million IPO
  • The underwriters on Flowco Holdings Inc.’s US$427 million IPO
  • The underwriters on Kodiak Gas Services, Inc.’s US$256 million IPO
  • Issuers and underwriters in dozens of initial public offerings, follow-on equity offerings and notes offerings

SPAC Mergers

  • Teamshares, a tech-enabled acquirer of high-quality small and medium-sized enterprises (SMEs), in its US$746 million de-SPAC merger with Live Oak Acquisition Corp. V
  • AIR Limited, a United Arab Emirates-based hookah and advanced inhalation technologies producer in its US$1.456 billion de-SPAC merger with Cantor Equity Partners III
  • Blaize, a developer of AI computing technologies, in its US$770 million de-SPAC merger with BurTech Acquisition Corp.
  • AirJoule, a developer of a renewable energy and cooling technology in its US$500 million de-SPAC merger with Power & Digital Infrastructure Acquisition II
  • Harley-Davidson in LiveWire’s US$1.77 billion de-SPAC 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 de-SPAC 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 de-SPAC merger with RMG Acquisition Corporation II, India’s largest de-SPAC to date, to create India’s biggest publicly traded renewable energy company by total generation capacity

Bar Qualification

  • Texas

Education

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