Skip to main content

Michael L. Fantozzi

Member/Managing Member, Boston Office; Chair, Corporate, Tax, Private Client & Immigration Division

[email protected]



Michael is a leading corporate, securities, and mergers and acquisitions lawyer who leads deals that transform clients’ businesses. He helps buyers and sellers purchase and divest assets, divisions, or entire companies and counsels issuers in public offerings, often working on transactions valued at hundreds of millions of dollars.

Michael is a senior member of both the Securities Practice Group and the Mergers and Acquisitions Practice Group. He represents public and private companies with an emphasis on financing transactions, mergers and acquisitions, and corporate governance issues. Michael has extensive mergers and acquisitions experience as both purchaser’s and seller’s counsel, and he has represented issuers in numerous public offerings.

Michael also plays a vital role in firm management: he is Managing Member of the firm’s Boston office, serves on the firm’s Executive Committee and is the Division Head for the firm's Corporate, Tax, Private Client, and Immigration Sections.


  • University of Notre Dame (JD)
  • Boston College (BA)


Mergers & Acquisitions

  • Hyperfine, Inc. (Nasdaq: HYPR) business combination, valued at $580 million, with Liminal Sciences and the SPAC, HealthCor Catalio Acquisition Corp.
  • The Metals Company’s (Nasdaq: TMC), formerly DeepGreen Metals, $2.9 billion business combination with the SPAC, Sustainable Opportunities Acquisition Corporation
  • Brooks Automation’s proposed $3 billion sale of its Semiconductor Solutions business to private equity firm Thomas H. Lee Partners, L.P.
  • Optum’s proposed acquisition of Atrius Health
  • Quantum-SI’s (Nasdaq: QSI) $1.46 billion business combination with the SPAC, HighCape Capital Acquisition Corp.
  • Butterfly Network’s (NYSE: BFLY) $1.5 billion business combination with the SPAC, Longview Acquisition Corp.
  • QIAGEN in its proposed $12.5 billion sale to Thermo Fisher Scientific
  • Brooks Automation’s approximately $450 million purchase of genomics service provider Genewiz Group
  • Brooks Automation’s $675 million sale of its semiconductor cryogenics business to Edwards Vacuum LLC (a member of the Atlas Copco Group)
  • John Hancock Financial Network’s sale of Signator Investors to Advisor Group
  • Connance’s sale to Waystar Health
  • Optum’s purchase of Reliant Medical Group
  • Fidelity’s purchase of a software solutions company
  • C&S Wholesale Grocers’ purchase of the assets of Davidson Co., Inc.
  • Brooks Automation’s $127 million purchase of BioStorage Technologies
  • John Hancock Financial Network’s purchase of the assets of Transamerica Financial Advisors
  • Naurex’s sale to Allergan
  • Leerink Swann’s sale of the assets of Leerink Swann Consulting to NCI Healthcare
  • John Hancock Financial Network’s purchase of Symetra Investment Services
  • C&S Wholesale Grocers’ purchase of the assets of Associated Wholesalers
  • Humedica’s sale to UnitedHealth Group
  • Piramal Healthcare Limited’s $635 million purchase of Decision Resources Group
  • iMDsoft’s $60 million sale to TPG
  • Ion Torrent Systems’ $725 million sale to Life Technologies
  • Amicas’ $267 million sale to Merge Healthcare
  • Vertex Pharmaceuticals’ $400 million purchase of ViroChem Pharma
  • iBasis’ $100 million sale to Royal KPN
  • Qiagen’s $1.6 billion purchase of Digene Corporation

Public Offerings

  • Vertex Pharmaceuticals in over $2.5 billion in equity and debt offerings

Michael also serves as counsel to Brooks Automation and John Hancock Life Insurance Company. Private company clients include C&S Wholesale Grocers, LAM Therapeutics and W.E. Aubuchon Co.

Recognition & Awards

  • Best Lawyers in America: Securities /Capital Markets Law (2007 – 2022); Corporate Law (2007 – 2022)
  • Included on the Massachusetts Super Lawyers list: Securities & Corporate Finance (2004 – 2006, 2008 – 2018)
  • Recommended by The Legal 500 United States for M&A: Middle-Market (2016 – 2017, 2020 – 2021); Capital Markets: Equity (2020)

Case Studies

Breaking Down the SPAC Surge Report Cover Mintz Case Study
Mintz analyzed PitchBook data to produce an in-depth report on the record rise in special purpose acquisition company (SPAC) fundraising in the US since 2020 and the recent increase in SPAC merger activity. We also explore how SPACs could evolve and litigation challenges to SPAC IPOs and transactions.

Recent Insights

News & Press

News & Press

News Thumbnail
Mintz was featured by Law360 as among the publication’s 2021 Regional Powerhouses for Massachusetts, alongside just four other firms. The Regional Powerhouses Series honors leading law firms in various states based on their exceptional achievements. In the firm’s profile, Managing Member of Mintz’s Boston Office and Chair of the firm’s Corporate, Tax, Private Client & Immigration Division Michael Fantozzi and Member and Chair of the firm’s Litigation Practice Scott C. Ford discussed the firm’s diverse history, a dedication to consistently achieving the best outcome for clients, and a culture of teamwork and advocacy.
News Thumbnail
Managing Member of Mintz’s Boston Office and Chair of the firm’s Corporate, Tax, Private Client & Immigration Division Michael Fantozzi was featured in an article published by Law360 Pulse for his work to help secure Quantum-Si Inc.'s merger with a special purpose acquisition company (SPAC) in a deal that values the combined company at $1.46 billion.
Press Release Thumbnail
In the latest guide, Mintz garnered rankings as a top national firm in eight practice areas, and 32 firm attorneys were individually recognized.
Press Release Thumbnail
Firm plays a key role in the largest health care acquisition to date in 2020.
This article profiles Mintz as one of the 2018 Law360 Massachusetts Powerhouse law firms. Mike Fantozzi, Managing Member of the firm’s Boston office and the Corporate, Tax, Private Client and Immigration Division Head, is quoted providing commentary throughout the piece.
Press Release Thumbnail
Best Lawyers named 85 Mintz attorneys to its 2018 list of The Best Lawyers in America. In addition, Mintz attorneys Matthew J. Gardella and Samuel M. Tony Starr were named “Lawyer of the Year” in their respective practice areas.
Susan M. Finegan, a Member of Mintz's Litigation Practice and Chair of the Pro Bono Committee, has been selected as the 2017 Woman of the Year on behalf of the Women’s Law Center at Boston College Law School.
Susan J. Cohen, Chair of the Immigration Practice at Mintz, is the recipient of the Lawyer Monthly 2017 Women in Law award.  Ms. Cohen is the only U.S. immigration attorney to be honored with this award.
Fifty-three Mintz attorneys have been named Massachusetts Super Lawyers for 2016 and thirty-one have been named Massachusetts Rising Stars. The findings will be published in the November 2016 issue of Boston Magazine and in a stand-alone magazine, New England Super Lawyers. 
Best Lawyers named 73 Mintz attorneys to its 2017 list of The Best Lawyers in America. Mintz attorneys selected for inclusion in this year’s list span 44 practice areas. 


Webinar Reference Image

New England Healthcare Executive Network Meeting

Special Purpose Acquisition Company ("SPAC") Impact On Medtech


Webinar Reference Image