Boston College Law School
JD, 1993, summa cum laude, Order of the Coif

Executive Editor, Boston College Law Review

Dartmouth College
BA, 1989, cum laude




Law Clerk, Hon. Michael Boudin, United States Court of Appeals for the First Circuit, 1994-1995

Publications & Events

Choate Hall & Stewart, On The Private Equity Middle-Market: Competition, Fee Pressure And China

Choate Ranked Among Most Active PE and VC Law Firms in 2017

Chambers USA 2017 Recognizes Choate Lawyers and Practices

Silversmith Capital Partners Makes $20 Million Growth Investment in ActiveCampaign

Brian Lenihan Named “M&A Trailblazer” by The National Law Journal

Choate, Hall & Stewart Named a Finalist in Six M&A Advisor "Deal of the Year" Categories

Choate Receives Top Chambers USA Rankings for 10 Practice Areas and 30 Attorneys

Choate Has 52 Attorneys Selected for 2016 Best Lawyers in America

Choate Receives Top National Rankings from The Legal 500 in Seven Practice Areas

Choate Receives Top Chambers USA Rankings for 10 Practice Areas and 27 Attorneys

Choate Sponsors Premier Canadian Venture Capital Conference

2013 Best Lawyers in America

Choate Sponsors 2012 Private Equity Symposium at MIT

Choate Co-Sponsors Networking Event for Dealmakers

Choate Sponsors Ontario's Premier Risk Capital Event

Choate Sponsors Major Canadian VC Event

Choate Sponsors Private Equity Symposium at MIT

Choate Co-Sponsors Private Equity and Investment Banking Networking Event

Brian Lenihan and Stephen Hurwitz on US-Canadian Dealmaking

Brian Lenihan on the Future of the Private Equity Market

Choate Sponsors Ottawa’s Premier Risk Capital Event

Choate Sponsors Networking Event for Senior Private Equity and Investment Banking Professionals

Choate Co-Sponsors Panel on Avoiding Disruptive and Expensive Litigation

Stephen Cohen and Brian Lenihan Quoted in the Boston Business Journal

Choate Sponsors Invitation-Only Dealmakers Event

Brian P. Lenihan

Business Department Co-Chair

t 617-248-4929   f 617-248-4000

“a great negotiator … has the gravitas that comes with experience" 

Chambers USA

Brian Lenihan is co-chair of the firm’s Business Department. He has been named to The National Law Journal’s annual list of “Mergers & Acquisitions Trailblazers.” He is listed in Best Lawyers in America for corporate and venture capital law and has been recognized in Chambers USA as a leading lawyer in the area of private equity since 2006. Mr. Lenihan is named in The Legal 500 for Private Equity Buyouts and Venture Capital and Emerging Companies and in Massachusetts Super Lawyers for mergers & acquisitions and corporate law.

Practice Focus

Private Equity: representation of private equity funds in a broad range of financing transactions, including leveraged buyouts, majority and minority recapitalizations, and growth equity investments.

Representative Private Equity Clients: Century Equity Partners, M/C Partners, Sectoral Asset Management, Silversmith Capital Partners, Spectrum Equity Investors, Summit Partners, Symmetric Capital.

Business & Technology: corporate transactions for private technology companies, including mergers and acquisitions, venture capital financings and cross-border transactions. Regularly acts as special counsel to Canadian companies and investors in cross-border transactions with US funds or issuers. Particular domain expertise in financial technology and IT solutions for the healthcare and financial services industries.

Representative Technology Clients: BioRx, Complete Innovations, Denovo, Industrial Defender, Kapa Biosystems, Kolide, Meteor Learning, Perspecsys, Semcasting, Teklinks, Threat Stack, Thrive Networks, Tripcraft, Venminder.

Representative Fintech Clients: Braintree Payment Solutions, Digital Risk, Flores & Associates, Global Cash Card, iPay Technologies, Merchant Customer Exchange (MCX), Mortgagebot, Venmo.

Representative Engagements

Private Equity

  • Represented Spectrum Equity in its investments in Definitive Healthcare (healthcare IT), Ethoca Solutions (credit card fraud solutions), Extreme Reach (digital advertising solutions), HealthMEDX (healthcare IT), Lucid Software (charting software), Net Health (healthcare IT), Pictometry (aerial imagery), Tenstreet (driver recruitment software), Verafin (AML compliance).
  • Represented Century Equity Partners in its investments in BrightClaim (claim management solutions), Broadstreet Capital Partners (specialty insurance broker), Colonial Claims (flood claim solutions), Conner Strong (specialty insurance broker), Digital Risk (mortgage fraud detection), Forethought Financial (pre-planning insurance), Flores & Associates (health benefits management), Priority Care Solutions (claim management solutions).
  • Represented M/C Partners in its investments in Denovo (data hosting), Ensono (IT business of Axciom), Everstream Solutions (fiber optic network), Great Lakes Comlink (ISP and CLEC), PlumChoice (technical support services), Thrive Networks/Corporate IT Solutions (managed services).
  • Represented Symmetric Capital in its investments in AirServ (airline services), BioRx (specialty pharmacy), Complete Innovations (fleet tracking software), Mathnasium (math tutoring services), Preventure (wellness solutions), School Improvement Network (online educator content), Teklinks (managed services).
  • Represented Silversmith Capital in its investments in Centauri Health Solutions (healthcare IT) and Impact Radius (digital marketing solutions).

Technology M&A

    • Represented Brightclaim in its sale to Genpact.
    • Represented Merchant Customer Exchange in its sale to JP Morgan Chase.
    • Represented HealthMEDX in its sale to NetSmart Technologies.
    • Represented Kapa Biosystems in its $445 million sale to Roche Diagnostics.
    • Represented BioRx in its $350 million sale to Diplomat Pharmacy.
    • Represented Industrial Defender in its sale to Lockheed Martin.
    • Represented Braintree Payment Solutions/Venmo in its $800 million sale to PayPal.
    • Represented Teklinks in its majority recapitalization by Pamlico Capital.
    • RepresentediPay Technologies in its $300 million sale to Jack Henry.

    Cross-Border M&A

    • Represented Greencore (Ireland) in its acquisition of various US companies, including On a Roll Sales, Marketfare Foods, H.C Schau, Lettieri’s, and Gretchen’s Shoe Box Express.
    • Represented Digital Risk in its $200 million sale to Mphasis (India).
    • Represented Complete Innovations (Canada) in its strategic investment from Madison Dearborn.
    • Represented Perspecsys (Canada) in its sale to Blue Coat Systems.
    • Represented Mortgagebot in its $232 million sale to D + H (Canada).

    Presentations and Publications

    • "Choate Hall & Stewart, On The Private Equity Middle-Market: Competition, Fee Pressure And China," quoted, Forbes, November 2017 
    • “Private Equity and Strategic Investors:  How Canadian CEOs Choose their Equity Partner,” moderator, Canadian Venture Capital Association Conference, May 2014.
    • “Cross-Border Legal and Tax Issues,” panelist, M&A International’s M&A in the Americas Conference, June 2013.
    • “Transactional and Operational Challenges and Strategies for International Growth,” panelist, Thriving in a Global Economy, June 2013.
    • “Unlocking Value in the Face of Uncertainty,” moderator, MIT Sloan Private Equity Symposium, May 2012.
    • “Q&A With Choate’s Brian Lenihan,” featured, Private Equity Law360, November 2011.
    • “The SEC Changeup on Private Equity Fund Registration,” co-author, Corporate Finance Law360, August 2011.
    • "The Right Investor: VC or Strategic," panel co-moderator, Ontario Venture Summit, Ottawa, October 2010. 
    • "Building Sustainable Operating Improvements into Portfolio Companies," moderator, Canadian Venture Capital Association Conference, May 2010. 
    • “Growth Equity,” moderator, MIT Sloan Private Equity Symposium, April 2010. 

    Professional and Community Involvement

    Mr. Lenihan is a former member of the firm’s Executive Committee and the former co-chair of the firm’s Private Equity group. He is a member of the American, Massachusetts and Boston Bar Associations. Mr. Lenihan serves on the board of Noonan Scholars, an organization that helps high achieving minority students from Boston attend and succeed in the nation’s top colleges. Mr. Lenihan also serves as the co-chair of the Friends of Dartmouth Track & Field and is a member of the Wearers of the Green, Dartmouth’s athletic hall of fame.


    Thank you for reaching out to contact Choate. Before you send your message, we wanted to make sure you are aware of the following. Please do not send any confidential information in response to this link. Sending an e-mail to Choate does not give rise to an attorney-client relationship, and will not be deemed to disqualify Choate from undertaking any engagement for a current or future client.  Before any attorney-client engagement may be formed, Choate will need to check for possible conflicts of interest, you will need to consider whether you wish to retain Choate as counsel, and we will need to consider whether we wish to accept the potential engagement. In the meantime, Choate reserves the right to represent parties with interests adverse to you.