Ryan J. Maierson

  • Partner
  • Eryan.maierson@lw.com
  • 811 Main Street
  • Suite 3700
  • Houston, TX 77002
  • USA
  • T +1.713.546.7420


Ryan Maierson, a partner in the Houston office and a member of the firm’s Executive Committee, is the former Global Chair of Latham’s Public Company Representation Practice and former Chair of the firm’s Houston Corporate Department. Mr. Maierson has particular knowledge in M&A and corporate finance transactions in the energy industry, as well as both business combination transactions and initial public offerings involving special purpose acquisition companies. He focuses on:

  • Mergers and acquisitions
  • Representing issuers and underwriters in IPOs and other securities offerings
  • Representing operating companies in “deSPAC” merger transactions 
  • Corporate governance

Mr. Maierson is an adjunct professor at the University of Houston Law Center, where he co-teaches “Doing Deals,” a course on M&A practice, with Professor Douglas Moll.

Mr. Maierson has been recognized in the following publications:

  • Law360 as an Energy MVP (2020) 
  • Texas Best Lawyers as Lawyer of the Year for Securities/Capital Markets Law in Texas (2020)
  • The Legal 500 US as a recommended lawyer for Corporate Governance and Shareholder Activism: Advice to Boards (2020)
  • The Legal 500 US as a Leading Lawyer for Energy Transactions: Oil and Gas (2017-2020)
  • Chambers USA for Capital Markets: Debt & Equity both in Texas and Nationwide (2017-2020)
  • The Best Lawyers in America for Securities/Capital Markets Law (2012 – 2022) (Best Lawyers is by BL Rankings)
  • Who’s Who Legal: M&A and Governance (2019)
  • Texas Super Lawyers (2016-2020) (Super Lawyers is a Thomson Reuters service)


Mr. Maierson's experience includes advising: 

M&A transactions
  • USHG Acquisition Corp. in its proposed merger with Panera Brands
  • Rosecliff Acquisition Corp I in its proposed US$1 billion merger with GT Gettaxi
  • Aeva, a perception platform company, in its proposed US$1.7 billion deSPAC merger with InterPrivate Acquisition Corp. 
  • RMG Acquisition Corp., a special purpose acquisition company, in its US$1.33 billion merger with Romeo Power Technology, a leading energy technology company (pending)
  • 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
  • Desktop Metal, a technology company that designs and markets 3D printing systems, in its US$2.5 billion merger with Trine Acquisition Corp., a special purpose acquisition company (pending)
  • Equitrans Midstream Corporation in transformative actions including its acquisition of EQM Midstream Partners, a share buy back from EQT, and entrance into a gas gathering and compression agreement with EQT (and various affiliates) providing EQM with a minimum volume commitment of 3.0 billion cubic feet of natural gas per day during the term
  • The conflicts committee of Shell Midstream Partners in connection with its acquisition of Royal Dutch Shell plc’s interest in Mattox Pipeline Company, LLC, and certain logistics assets at the Shell Norco Manufacturing Complex, totaling US$4.4 billion
  • Energy Capital Partners in its sale of Summit Midstream Partners, LLC, a company that owns, operates and develops various crude oil, natural gas, and water-related midstream energy infrastructure assets, to Summit Midstream Partners, LP
  • Superior Energy Services in its carve-out/merger of its North American Business with Forbes Energy Services, a provider of drilling and production related services to oil and natural gas companies. The matter was withdrawn
  • Citizen Energy Operating in its US$1 billion acquisition of Roan Resources, an oil and natural gas exploration and production company
  • Midstates Petroleum Company in its US$729 million merger of equals with Amplify Energy, an independent oil and natural gas company
  • UGI Corporation in its US$1.275 billion acquisition of Columbia Midstream Group, LLC from a subsidiary of TC Energy Corporation
  • Archrock, Inc. in its US$410 million acquisition of Elite Compression Services LLC’s midstream oil and gas infrastructure assets
  • EQM Midstream Partners in its US$1.03 billion acquisition of controlling interest in Eureka Midstream and Hornet Midstream and related US$1.00 billion preferred equity financing
  • IPSCO Tubulars, a producer of seamless and welded oil country tubular goods, in its US$1.02 billion sale to Tenaris (pending)
  • UGI in its US$5.375 billion acquisition of the remaining 74% stake in Amerigas, a retail propane distributor
  • WL Ross as major shareholder in the spin-merger of Diamond S Shipping, a Greece-based oil tanker company, and a subsidiary of Capital Product Partners
  • A global oil and gas company in its acquisition of Gulf of Mexico oil and gas properties in the bankruptcy proceedings of Cobalt International Energy
  • Rice Midstream Partners in its US$2.4 billion merger with EQT Midstream Partners
  • Buckeye Partners in its US$1.15 billion acquisition of 50% stake in VTTI
  • Energy Transfer Partners in its US$20 billion merger with Sunoco Logistics Partners
  • Energy Transfer Partners LP in its US$18 billion acquisition of Regency Energy Partners LP
  • Access Midstream Partners, LP in its US$50 billion merger with Williams Partners
  • VTTI in its US$1.03 billion acquisition of VTTI Energy Partners
  • Archrock, Inc. in its US$607 million acquisition of its master limited partnership, Archrock Partners LP
  • Layne Christensen Co. in its US$565 million sale to Granite Construction, Inc.
  • JP Energy Partners in its US$456 million merger with American Midstream Partners, to create a diversified midstream business operating in North American basins, including the Permian, Gulf of Mexico, Eagle Ford, and Bakken
  • Access Midstream Partners in its US$2.16 billion acquisition of gathering and processing assets from Chesapeake Energy and US$1.8 billion of related equity and debt capital markets offerings
  • Global Infrastructure Partners in its US$2.0 billion acquisition from Chesapeake Energy of general partner and limited partner interests in Chesapeake Midstream Partners
  • Archrock Holdings in the spin-off of its international services and global fabrication businesses to form Exterran Holdings
  • Exterran Partners, LP in its US$360 million acquisition of natural gas compression assets from MidCon Compression, LLC
  • Otonomo Technologies, an Israel-based automotive data services platform, in its proposed US$1.4 billion merger with Software Acquisition Group, Inc. II
  • Fertitta Entertainment, a manager and operator of casinos and the parent company of Golden Nugget/Landry's, in its US$6.6 billion merger with FAST Acquisition Corp.
  • Nexters Global, a Cyprus-based mobile & social game developer and publisher, in its proposed US$1.9 billion merger with Kismet Acquisition One Corp.
Capital markets transactions
  • RMG Acquisition Corp., a special purpose acquisition company, in its US$230 million initial public offering 
  • East Resources Acquisition Company, a special purpose acquisition company, in its US$300 million initial public offering 
  • Superior Energy Services, Inc. in its dual-issuer uptiering exchange offer for US$635 million of senior notes of SESI, L.L.C. and related consent solicitation
  • ProPetro Holding Corp. US$402 million initial public offering
  • Smart Sand, Inc. US$128.7 million initial public offering
  • Solaris Oilfield Infrastructure, Inc. US$121 million initial public offering
  • Antero Midstream GP LP US$875 million initial public offering
  • Emerge Energy Services LP US$131 million initial public offering and private placement of preferred units
  • PennTex Midstream Partners, LP US$225 million initial public offering
  • Antero Resources US$1.57 billion initial public offering of and the US$1 billion and US$600 million notes offerings
  • Enable Midstream Partners US$500 million initial public offering, the largest entity at IPO in the history of the MLP sector
  • Cypress Energy Partners, L.P. US$86.25 million initial public offering
  • JP Energy Partners LP US$275 million initial public offering
  • Southcross Energy Partners US$180 million initial public offering
  • Solaris Oilfield Infrastructure, Inc. US$121 million initial public offering

Thought Leadership

  • Legal Side of ESG: Top Three Issues to Watch in 2022 -  April 04, 2022
  • SPAC-Related Enforcement and Litigation: What to Expect in 2022 -  March 28, 2022
  • Environmental, Social, and Governance Matters: The Rapidly Evolving ESG Reporting Landscape -  January 26, 2022
  • Delaware Court Applies Entire Fairness Standard to MultiPlan de-SPAC -  January 19, 2022
  • ESG in 2022: 10 Things to Look Out For -  January 05, 2022
  • SPAC-Related Litigation Risks and Mitigation Strategies  -  August 09, 2021
  • Environmental, Social, and Governance Matters: The Rapidly Evolving ESG Reporting Landscape -  January 19, 2021
  • ESG in 2021: 10 Things to Look Out For -  January 07, 2021
  • PE Views: Insights on the World of Private Equity -  December 16, 2020
  • Changing of the Guard at the SEC Heralds New Day for ESG Disclosure Rules -  November 24, 2020
  • Challenging Year Highlights Supply Chain Risks  -  November 09, 2020
  • WEF’s International Business Council Releases White Paper on Converging ESG Reporting Standards -  September 25, 2020
  • US Department of Labor Continues to Double Down on ESG Factors -  September 09, 2020
  • SEC Amendments to Regulation S-K Are Silent on ESG Disclosures -  August 31, 2020
  • Considerations for REITs in Adopting a Poison Pill in Response to the COVID-19 Crisis -  June 02, 2020
  • Proactively Adopting a Poison Pill in Response to the COVID-19 Crisis -  March 30, 2020
  • Directors, Take Note: ESG Can Drive Value in 2020 -  February 19, 2020
  • Spin-offs Unraveled: Complex ‘IPOs’ With a Sophisticated Tax Overlay -  October 09, 2019
  • Boardroom Perspectives: 5 Key Takeaways on Cybersecurity -  June 01, 2018
  • Boardroom Perspectives: 3 Steps FPI Directors Can Take to Oversee Related-Party Transactions -  October 06, 2017
  • Proxy Access – Preparing for the 2016 Proxy Season -  October 30, 2015
  • Midstream MLP Merger Mania Maintains Momentum -  October 30, 2014
  • Four Trends in Master Limited Partnership M&A in 2014 -  October 01, 2014
  • 6 Oilfield Services Trends In Unconventional Resources  -  May 22, 2014
  • Master Limited Partnership Year in Review: 10 MLP Observations from 2013 -  January 15, 2014
  • Tracking Emerging Growth Cos. Under the JOBS Act -  May 16, 2013
  • Regulatory: Navigating the “Dual Track” IPO/M&A process -  April 10, 2013
  • Upstream M&A Trends in the Oil and Gas Industry -  March 13, 2013

According to sources:

"He has impeccable instincts and knows how to get to the heart of a matter."

"There’s nothing he hasn’t seen before, which is incredible since he is so young."

Chambers USA 2021
Bar Qualification
  • Texas
  • JD, University of Texas School of Law, 1996
    With Honors, Order of the Coif
  • BS, Wharton School, University of Pennsylvania, 1992
    magna cum laude
  • Energy & Infrastructure
  • Capital Markets
  • Master Limited Partnerships
  • Activism Defense
  • Public Company Representation
  • Mergers & Acquisitions
  • Private Equity
  • Corporate Governance