David Champoux is a partner in Pierce Atwood's Business Law Practice Group. His practice focuses on business transactions and business entities, including acquisitions and dispositions of businesses (through asset purchase, stock purchase or merger), securities offerings and other financing transactions, structuring and negotiating complex commercial contracts, forming business entities and counseling clients on corporate governance matters and shareholder and other agreements among the entities' owners, and advising clients on compliance with federal and state securities law public disclosure and other requirements.

David practiced as an associate at Sullivan & Cromwell in New York before joining Pierce Atwood.

Honors & Distinctions

  • Listed in The Best Lawyers in America® since 2003 
  • Named a "Lawyer of the Year" in Portland, Maine for Securities/Capital Markets Law by The Best Lawyers in America® in 2017, and for Mergers and Acquisitions Law in 2015 and 2016
  • Listed in Chambers USA for Corporate/M&A Law

Professional Activities

  • Member, Business Law Section, Maine Bar Association
  • Past Chair, Business Law Section, Maine Bar Association


  • Co-author of the chapter on the Maine securities statute in J. Zimpritch, Maine Corporation Law & Practice (2d edition, 2004)

Civic Activities

  • Chair, Committee on Trustees, North Yarmouth Academy Board of Trustees, 2005-present
  • Member, Board of Directors of the United States Tennis Association/New England, 2009-present
  • Member, Board of Directors of the Maine Tennis Association, 2007-present

Practice Areas

David has been the lead attorney on numerous significant recent transactional and other business matters, including:

Representative Experience

  • Lead counsel to ImmuCell Corporation in 2016 SEC-registered offering of $5.9 million of common stock
  • Lead counsel to The First Bancorp in 2013 SEC registered offering of $10.75 million of common stock
  • Outside counsel responsible for advising two SEC reporting clients, The First Bancorp, Inc. (a $1.5 billion asset bank holding company) and Immucell Corporation (a Portland-based developer and producer of veterinary products for the dairy and beef cattle industries), in fulfilling their SEC disclosure and other compliance obligations, including compliance with Sarbanes Oxley and Dodd Frank, and other corporate governance matters, such as formulating board and committee policies, addressing stockholder proxy proposals, and developing and implementing shareholder rights plans and bylaw exculpation and indemnification provisions
  • Counsel to NEPW Logistics, a logistics and warehousing firm, in its 2014 equity recapitalization
  • Lead counsel (2004-present) to BlueTarp Financial, a provider of card and transactional data services to the building and construction supply trade, in multiple rounds of venture capital-led convertible preferred stock financings
  • Counsel to two independent medical practice groups in negotiating services agreements with hospital systems

Representative Experience

  • Lead counsel to Verso Corporation and affiliates in their 2015 sale of 303 MW electric generating facilities in Bucksport, ME
  • Counsel to principal owners in 2015 sale of Worumbo hydroelectric 19.4 MW facility
  • Transaction counsel to Dead River Company in its 2014 equity investment in Xpress Natural Gas LLC, a provider of LNG and related delivery services, and related commercial contracts