James Mayne is a partner in Goodwin’s Private Equity practice. He counsels clients on mergers and acquisitions, joint ventures, minority investments, secondary transactions and private investment fund formation.

Mr. Mayne has extensive expertise representing clients in the financial services and technology industries, and has advised on dozens of transactions in the asset management industry over two decades practicing corporate law.

Mr. Mayne is admitted to practice in New York.

Areas of Practice
Domaines D’Expertise





  • Represented a bulge bracket investment bank in:*
    • Three private spin-off transactions resulting, in each case, in an independent investment manager
    • The sale of two wealth management businesses
    • Investments in, and commercial agreements with, various fintech firms
    • Minority investments in, and joint ventures and sub-advisory relationships with, several independent investment managers
    • The restructuring of its minority investment in the manager of one of the 20 largest hedge funds in the world
    • Establishing a private equity, venture capital and opportunistic real estate co-investment platform
    • Launching an investment product aiming to invest in hedge fund GP interests
    • Various secondary transactions including GP-led secondary transactions
  • Launched private investment funds in multiple geographies and across multiple asset classes including growth equity, private equity, private credit, real estate, infrastructure, insurance-linked strategies and ESG focused strategies*
  • Advised a growth equity investment team on over fifty investment and disposal transactions in the technology sector*

*Denotes experience prior to joining Goodwin

Professional Activities

In addition to his legal practice, Mr. Mayne is a Chartered Financial Analyst and an active member of CFA Society New York.

Mr. Mayne is also actively involved in industry-wide diversity, equity and inclusion initiatives.

Professional Experience

Prior to joining Goodwin, Mr. Mayne was the Head of M&A/Illiquid Transactions (AM) at Credit Suisse, leading a General Counsel Division team and representing the bank in strategic transactions, the formation of illiquid funds and investment transactions by those funds.

Prior to joining Credit Suisse, Mr. Mayne spent seven years in Skadden Arps’ Financial Institutions Group.

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Bachelors in Commerce and Laws, 2001
University of New South Wales



New York
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Our clients rely on us for world-class advisory services, counsel on complex transactional work and high-stakes litigation. Specializing in matters involving the financial, life sciences, private equity, real estate, and technology industries, we use a collaborative, cross-disciplinary approach to resolve our clients’ most challenging issues. To find out more, please contact us.


Nos équipes interviennent aux côtés de nos clients, industriels, fonds d’investissement, startups, institutions financières et dirigeants, dans le cadre de transactions et de contentieux complexes, et apportent des conseils de tout premier plan dans les secteurs financiers, des Sciences de la Vie, du Private Equity, de l’immobilier et des technologies. Nous traitons les dossiers juridiques de manière intègre, ingénieuse, souple et audacieuse pour répondre efficacement aux enjeux propres à chacun de nos clients, quels que soient la taille de l’opération et le secteur d’activité. Pour en savoir plus, contactez-nous.

Unsere Kunden verlassen sich auf unsere erstklassige Beratung, vor allem im Hinblick auf komplexe Transaktionen und High-Stakes-Prozesse. Spezialisiert auf Angelegenheiten der Finanz-, Life-Sciences-, Private-Equity-, Immobilien-und Technologie-Branchen, verwenden wir einen kooperativen und interdisziplinären Ansatz, um Fragen unserer Kunden auch in extremen Spezialsituationen einer Lösung zuzuführen. Sie wollen mehr erfahren? Kontaktieren Sie uns gerne.

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