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Joshua D. Fox


[email protected]



Josh helps entrepreneurs build their businesses and advises them on significant transactions in the life cycle of their companies, with a particular focus on fundraising transactions and exit events.

He represents founders, start-ups, and emerging companies, serving as general counsel to those start-ups and emerging companies. Josh advises clients regarding company formation and early-stage legal issues, a broad range of financings, including angel, venture capital, and strategic investments, and mergers and acquisitions. He also provides guidance on legal and business matters that arise in the daily operations of their businesses.

Josh typically works with companies in the life sciences industry — drug development, devices, diagnostics, and tools — and in the technology sector, including energy, digital health, software. He has helped numerous clients, including the following, to grow and thrive:

  • Aquinnah Pharmaceuticals
  • Asimov
  • Axoft
  • Bilayer Therapeutics
  • Droplette
  • Hopewell Therapeutics
  • KiraGen Bio
  • Limax Biosciences
  • MediSix Therapeutics
  • NanoView Biosciences
  • NextGen Jane
  • PanTher Therapeutics
  • Quaise Energy
  • Sengenics
  • Stemloop
  • Syntis Bio
  • Teal Bio

In addition to counseling entrepreneurs and emerging companies, Josh represents venture capital firms, foundations, and other investors.

Josh frequently speaks about topics related to entrepreneurship, financing, exit strategies, and best practices for businesses. He has also been a lecturer at the Boston University School of Law, teaching a class on venture capital financings that he created.

Josh maintains an active pro bono practice and is involved in the firm’s operations, including hiring activities.


Read about Quaise Energy, a trailblazer in the terawatt-scale geothermal energy space, and its recent $21 million Series A1 financing round, which will help Quaise accelerate its field operations and secure its supply chain.

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In this episode of Client Corner, Josh speaks to Suono Bio’s CEO Scott Kellogg and COO Skip Farinha. Scott and Skip discuss the importance of active listening in managing a team, strategies for navigating the medical device approval process in the US, key factors to consider when selecting investors, and insights on managing unforeseen challenges.

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In this episode of Client Corner, Josh speaks to Paul Le Floch, Co-founder & CEO of Axoft. Paul discusses his journey from growing up in France to becoming a founder and the CEO of a neurotechnology startup. He provides insight into forming Axoft and navigating the fundraising process and offers advice to individuals starting new ventures.

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In this episode of Client Corner, Josh speaks to Gio Traverso, MIT professor, founder of several biotech companies, and a physician. Gio discusses his experience starting six different companies with Josh, comprising both for-profit and nonprofit entities. He reflects upon the process of deciding whether to start a business using a nonprofit or a for-profit structure, bringing together a strong team, evaluating potential investors, and licensing intellectual property from a university.

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In this week’s episode of Client Corner, Josh speaks to Carlos Araque, Co-founder and CEO of Quaise Energy. Carlos discusses his motivation in developing Quaise Energy and his guiding philosophy of impact over probability of success. He provides advice to other first-time CEOs and offers insights on the state of diversity in the technology sector.

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In this week’s episode of Client Corner, Member and Host Josh Fox chats with Anna Turetsky, Principal, Venture Investments for the Mark Foundation for Cancer Research.

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In this episode of Client Corner, Josh chats with Rahul Dhanda, co-founder and CEO of Syntis Bio, a late-stage, preclinical company developing a new class of therapy.

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In this episode of Client Corner, Josh chats with John Edwards, an executive chair, board member, and senior adviser to start-up and clinical-stage biotechnology companies.

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In this episode of Client Corner, Member Josh Fox talks with NextGen Jane’s Co-founder and CEO, Ridhi Tariyal about how the company is using precision medicine to transform obstetric and gynecological care.

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In this episode of Client Corner, Joshua Fox chats with Jerry Williamson, CEO of Sengenics. Jerry has more than 30 years of experience in bioscience markets for life science research, diagnostics, and analytical products.

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News & Press

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CAMBRIDGE, Mass.—Mintz advised Quaise Energy, a developer of a new hybrid deep drilling technology for geothermal energy, in its recent $21 million Series A1 funding round. The deal brings Quaise’s total funding to more than $95 million. The investment will be used to scale up Quaise’s supply chain and enhance its field operations by improving geologic understanding at plant sites.

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Bloomberg Law quoted Members Joshua Fox and Louis Mercedes, as well as Associate Aaron Fenton in an article analyzing potential reasons why Harvard Law graduates are accepting job offers outside of Massachusetts. Joshua, Lou, and Aaron discussed the benefits graduates have when staying local to the Boston area.

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BOSTON – Mintz announced today that it advised Hopewell Therapeutics, a biotechnology company with a differentiated lipid nanoparticle platform harnessing unique ionizable lipid chemistry, in its Seed Financing of up to $25 million. The funds will enable Hopewell to advance the development of genomic medicines based on its differentiated tissue-targeted Lipid Nanoparticle (ttLNP) platform through both internal pipeline programs and external partnerships.

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BOSTON –Mintz announced today that 39 of its practices and 81 of its attorneys earned recognition in the 2023 edition of Chambers USA, a guide to the country’s leading law firms.

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Carta quoted Member Joshua Fox about the state of the venture capital environment and the creative solutions startups are leaning on to avoid a down round.

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Mintz's sponsorship and involvement with the MassNextGen Initiative was highlighted in a press release issued by the Massachusetts Life Sciences Center.

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BOSTON – Mintz has entered into an exclusive partnership with Nucleate Boston, providing the nonprofit organization with legal support for its 2023 Activator Program.

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Mintz Member Joshua Fox spoke to the Wall Street Journal about what's ahead for biotech startups and venture capitalists following a difficult year.

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Mintz Member Joshua Fox spoke to Forbes about the logistics of Shark Tank and how deal terms develop after filming.

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Mintz advised Asimov in a $200 million fundraising aimed at helping the synthetic biology company scale its tools and services business focused on biologics, cell and gene therapies, and RNA. Mintz Member and seasoned life sciences transactional attorney Joshua Fox led a team that included Associates Kaoru Suzuki and Michael Katz.

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Mintz represented Axoft, a neurotechnology company, in its $8 million seed round led by The Engine, a venture firm spun out of MIT that invests in early-stage Tough Tech companies.

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Mintz took lead role for long-term client NanoView Biosciences in its sale to Unchained Labs, a portfolio company of The Carlyle Group. NanoView, through its ExoView technology, characterizes exosomes and the company’s LentiView platform complements Unchained Labs’ tools for gene therapy researchers working with lentivirus, which is an immunodeficiency virus that causes AIDS.

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In New Report, Dealmakers across the Life Sciences Industry Identify Top Deal Drivers, Successful Integration Strategies, and More.
An article published by The American Lawyer highlighted the arrival of Joshua Fox in Boston and Stephen Osborn in San Francisco as Members in Mintz’s Corporate group.

The article noted that “Osborn and Fox are the latest hires in Mintz’s growing corporate practice, which also had two notable hires in March. The Boston-based firm is enjoying record revenue and profit highs after four straight years of growth.”
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Events & Speaking


BIO International Convention 2024

San Diego Convention Center, California

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Recognition & Awards

  • Chambers USA: Nationwide - Start Ups and Emerging Companies (2023-2024)

  • Chambers USA: Massachusetts- Private Equity: Venture Capital Investment (2024)

  • Boston Magazine: Top Lawyers – Corporate Law (2021)

  • Conservation Law Foundation, Legal Food Hub: Distinguished Service Award (2019)

  • The Legal 500 United States: Recommended for Finance: Capital Markets: Equity Offerings: Advice to Managers (2016)

  • Boston Magazine: New England Super Lawyers Rising Stars (2008, 2010 – 2016)

  • Boston Bar Association, Lawyers Committee for Civil Rights Under Law: Civil Rights Recognition Award (2010)

  • Phi Beta Kappa

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  • Board of Directors, Lawyers for Civil Rights
  • Past Member, Board of Visitors, D’Amore-McKim School of Business, Northeastern University
  • Past President and Member, Board of Directors, Tufts Lawyers Association
  • Past Mentor, BUILD
  • Past Member, Leadership Council, Dana-Farber Cancer Institute
  • Past Member, Alumni Council, Tufts University
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