Cynthia T. Mazareas

Cynthia Mazareas is a leading corporate attorney and trusted business advisor to companies in the life sciences, medical device and biopharmaceutical industries. She has more than 25 years of experience providing ongoing, strategic business counsel to boards, management teams and in-house counsel, representing both high-growth private and public companies in day-to-day corporate matters and helping these companies navigate through complex business transactions. She is a member of the firm's Life Sciences Group and Corporate Governance and Disclosure Group.

Whatever type of client or matter might land on her desk, Ms. Mazareas takes great pride in her work. She has a deep appreciation for the life sciences field, as her clients are developing innovations to improve the lives of those affected by various medical conditions. Therefore, she considers herself a business partner to her clients and offers practical and solutions-oriented advice based on her deep knowledge of the legal issues unique to the industry.

In addition to advising clients on a wide range of corporate matters, Ms. Mazareas has significant experience counseling public and private companies in venture capital and public securities offerings including IPOs, PIPEs, registered direct and Rule 144A convertible debt offerings, as well as mergers and acquisitions, strategic alliances, matters of SEC, NASDAQ and Sarbanes-Oxley compliance and corporate governance.

Professional Activities

Ms. Mazareas is an author and speaker on corporate transactions, governance and other matters relating to life sciences and biotechnology companies. Ms. Mazareas is on the Board of Directors for Life Sciences Cares, a nonprofit organization that brings together the life sciences industry to eliminate the impact of poverty in the greater Boston area.

Ms. Mazareas is a member of the Massachusetts Biotechnology Council, the Massachusetts Bar Association and the Boston Bar Association. She is also a member of the firm's Women's Leadership Initiative.

  • Cynthia Mazareas Named Among the 2019 Best Lawyers in America®

    Cynthia Mazareas is recognized by her peers as an outstanding lawyer in the areas of biotechnology and life sciences.

    August 15, 2018
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  • LMG Life Sciences Recognizes Cynthia Mazareas as US Rising Transactional Star

    In its annual recognition of top law firms, lawyers and in-house counsel in the life sciences industry, LMG Life Sciences named Cynthia Mazareas to its 2017 award shortlist.

    July 20, 2017
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  • Cynthia Mazareas Joins Life Science Cares Board

    Cynthia Mazareas joined the board of directors of Life Science Cares, an organization seeking to eliminate the impact of poverty in the greater Boston-area through collective effort.

    June 6, 2018
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    • Representation of Arsanis in its initial public offering
    • Representation of Agios Pharmaceuticals in several follow-on offerings as well as its initial public offering and side-by-side private placement with Celgene Corporation
    • Representation of Syros Pharmaceuticals in its initial public offering, follow-on public offering and side-by-side private placement with Incyte Corporation and PIPE
    • Representation of Achillion Pharmaceuticals in its strategic equity investment by Johnson & Johnson Innovation-JJDC, Inc., and its secondary sale by Johnson & Johnson Innovation-JJDC, Inc.
    • Representation of Achillion Pharmaceuticals in its registered direct offering with a privately owned hedge fund sponsor
    • Representation of Infinity Pharmaceuticals in its reverse merger/going public transaction, its strategic equity transactions with Purdue Pharma and Purdue Pharma's subsequent secondary underwritten public offerings
    • Representation of numerous publicly traded life science companies in underwritten follow-on offerings, including Agios Pharmaceuticals, Achillion Pharmaceuticals, AVEO Pharmaceuticals, Curis, and Infinity Pharmaceuticals
    • Representation of several public companies in the establishment of "at-the-market" sales arrangements
    • Representation of several publicly traded life science and medical device companies in PIPE, registered direct, Rule 144A convertible debt and strategic equity transactions
    • Representation of numerous privately held life science companies in early-stage, bridge and mezzanine venture capital transactions, including BlinkBio, KEW Group and Translate Bio


Insights & News


  • Education

    • JD, Georgetown University Law Center, 1993

    • BS, Boston University, 1985

  • Admissions

    • Massachusetts