Rankings

UK

Leading firm in UK 2026

Contributions and articles

13 Global Practice Guides

Overview

Provided by Sidley Austin LLP

  • Chair of Executive Committee: Brian J. Fahrney

    Chair of Management Committee: Yvette Ostolaza

    London Managing Partner: Thomas Thesing

    Number of partners worldwide: Over 650

    Number of lawyers worldwide: 2,300

    Sidley is an elite global law firm with US$3.1 billion in revenue powered by lawyers who practice at the highest level of the profession. Backed by 158 years of experience, we deliver superior service to a high-caliber group of market-leading clients worldwide, while placing a premium on collaboration and diversity.

    Our firm boasts a roster of 2,300 lawyers who wield deep experience in litigation, transactional, and regulatory matters spanning over 50 legal disciplines and industries.

    With 22 offices, including our new Miami office, situated in major commercial and financial capitals around the world, our lawyers possess the cultural awareness and legal acumen needed to advise clients in today’s global economy. Follow Sidley on Twitter@SidleyLaw.

    PRINCIPAL AREAS OF WORK

    • Banking & Financial Services Regulatory
    • Capital Markets
    • Competition/Antitrust
    • Dispute Resolution
    • Finance
    • Insurance
    • Investment Funds
    • Life Sciences
    • M&A & Private Equity
    • Privacy & Cybersecurity
    • Restructuring
    • Tax

    Sidley and Sidley Austin refers to Sidley Austin LLP and affiliated partnerships as explained at www.sidley.com/disclaimer.

Ranked Offices at Sidley Austin LLP

Provided by Sidley Austin LLP

USA - Head office

Illinois

One South Dearborn, Chicago, Illinois, USA, IL 60603, Chicago

UK

Greater London

70 ST MARY AXE, London, Greater London, UK, EC3A 8BE, London

Ranked Departments at Sidley Austin LLP (12)

London (Firms)

UK-wide

Ranked Individuals at Sidley Austin LLP (41)

London (Firms)

UK-wide

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