Thomas R. Burton III

Member / Chair, Energy & Sustainability Practice vCard


  • Boston College (JD, Order of the Coif, 1996)
  • Boston College (BA, 1993)

Bar Admissions

  • Massachusetts

Tom’s global practice focuses on complex corporate finance matters including mergers and acquisitions, venture capital, private equity, and securities transactions. He represents high-growth and emerging businesses, including companies in the energy and clean technology, social media and software industries, as well as life science companies, from start-ups to public companies.

In 2004, Tom founded, and currently chairs, the firm’s Energy & Sustainability Practice, which has completed more than 500 transactions across energy sectors totaling over $7.5 billion since 2006. Serving more than 250 clients, spanning the ecosystem from emerging companies to large corporations, venture capital and private equity funds, investment banks, project developers, and family offices, the firm is recognized nationally as a leading law firm in the space. Tom is ranked by Best Lawyers in America in the Corporate Law section, and he is recognized by The Legal 500 United States as “rising to the fore” in energy technology for Venture Capital and Emerging Companies.

On the corporate and securities side, Tom has served as counsel in the structuring and completion of over 400 venture capital and private equity financings, representing both the funds providing the capital and the emerging growth companies seeking funding. His work in this area has raised billions of dollars. He organizes venture capital funds and represents them in their portfolio investments. Tom is also a key contributor to MintzEdge, an online resource for entrepreneurs that includes useful tools and information for starting and growing a company. In addition, he devotes a portion of his practice to counseling social enterprise companies, impact investors, and nonprofit companies.

Tom routinely counsels businesses on their growth and development, advises their boards of directors on corporate governance matters, and participates in an array of transactions, from private and public offerings to mergers and acquisitions, joint ventures, and technology transfer matters. Tom also has experience in advising investment banks in private placements and underwritten public offerings of equity securities, and in their role as financial advisor in mergers and acquisitions.

He applies his background in corporate finance to counsel energy and clean technology companies through all stages of formation, financing, and exits. His energy and clean technology clients span markets such as solar and wind, smart grid and energy efficiency, energy storage, water technologies, waste treatment, biofuels, electric vehicles, and green buildings.




Representative Matters

  • Represented Greentech Media, Inc. in the sale of its business to Woods Mackenzie (Verisk Analytics, Inc.)
  • Represented Vionx Energy in licensing technology from United Technologies Corporation and subsequent equity financing
  • Represented NanoSteel in securing a $10 million venture loan facility from NASDAQ-listed Horizon Technology Finance Management
  • Represented Aspen Aerogels in its $82.5 million Initial Public Offering
  • Represented EnerNOC, Inc. in its acquisition of Pulse Energy
  • Served as counsel to Canaccord Genuity in $32.5 and $37.4 million follow-on public offerings for Rubicon Technology
  • Represented True North Venture Partners as lead investor in Harvest Power’s 2014 $20 million financing round
  • Represented First Solar, Inc. in its acquisition of TetraSun
  • Represented XL Hybrids in Windsail Capital debt financing
  • Served as counsel to FloDesign Sonics in its $10 million Series A financing led by Bright Capital and Pall Corporation
  • Represented GreatPoint Energy in its $1.25 billion financing and joint venture with China-based Wanxiang Holdings; selected as Greentech Media’s Deal of the Year in 2012
  • Represented NanoSteel in its Series C Convertible Preferred Stock Financing and Licensing Agreement with GM Ventures ($12 million)
  • Represented EnerNOC, Inc. in its IPO and follow-on offerings ($97 million, $108 million, and $97 million, respectively)
  • Televent GIT, S.A. follow-on offering ($66 million and $115 million, respectively), representing Canaccord Adams
  • Formation of New England Energy Innovation Collaborative (now the Northeast Clean Energy Council)
  • Represented Beryllium, LLC in a financing with a strategic partner

Recognitions & Awards

  • Decade of Influence Award, NECEC (2017)
  • JD Supra: Top Author, Reader’s Choice Awards – Energy (2017-2018)
  • Best Lawyers in America: Corporate Law (2015 - 2018)
  • Wunder Capital: 100 People Shaping Cleantech on Twitter (2015)
  • Recognized by The Legal 500 United States as “rising to the fore” in energy technology for Venture Capital and Emerging Companies (2014)
  • Included on the Massachusetts Super Lawyers list: Securities & Corporate Finance (2004, 2010 – 2017)
  • Euromoney’s LMG Cleantech & Renewable Energy: Top 100 Lawyers in CleanTech (2013)
  • Euromoney’s LMG Cleantech & Renewable Energy: Top 10 Clean Technology and Renewables Law Firm
  • Watershed Capital Group: #2 US Clean Technology law firm
  • World Technology Award Finalist: Law (2010) (The World Technology Network awards are released in association with Time, Fortune, Technology Review, CNN, and Science)
  • Boston Business Journal: 40 Under 40 (2009)
  • Susan Grant Desmaris Award, Boston College Law School
  • Order of the Coif, Boston College Law School

Professional & Community Involvement

  • Chair, Boston College Law Day (2017, 2018)
  • Advisor, SeaAhead BlueTech Innovation
  • Selection Committee Member, Big Path Capital’s SmarterMoney+ Review (2016)
  • Presenter, Cleantech Open Northeast CleanWeb Prize by Mintz Levin & EnerNOC, Inc. (2014, 2015)
  • Judge, MIT $100K Pitch Competition (2015, 2016)
  • Judge, Cleantech Open Northeast Regional Finals (2012-2015)
  • Presenter, Department of Energy Clean Energy Business Plan Competition (2012-2014)
  • Judge, MIT Clean Energy Prize; Grand Prize (2018), Track Final Round (2014), Grand Prize (2012), and Energy Efficiency and Infrastructure Finals (2011)
  • Co-chair, Massachusetts Water Innovation Mission to Israel (2012)
  • Judge, Cleantech Open National Finals (2010, 2011)
  • Judge, MassChallenge Business Plan Competition (2010)
  • Chair, CEO Search Committee & Trustee, New England Aquarium
  • Advisory committee member, Flutie Spectrum Enterprises LLC
  • Board of Trustees, Doug Flutie Jr. Foundation for Autism (2008-2014)
  • Advisory committee member, UMass Lowell Center for Sustainable Production Cleantech Project: An Agenda for a Healthy Economy
  • President, Boston College Law School Alumni Board of Directors (2016)