A&O Shearman, formally known as Allen & Overy Shearman, is an international law firm that is home to some of the best corporate lawyers in the UK. The company was formed through a strategic alliance between Allen & Overy and US-based Shearman & Sterling.
This collaboration blends the strengths and expertise of both law firms to provide comprehensive, global legal services. With a focus on innovation, client service, and deep industry knowledge, A&O Shearman has established itself as a leader in the legal profession, catering to a diverse range of clients across various sectors.

Legal Services Offered
A&O Shearman offers a wide array of legal services to meet the complex needs of its global clientele. Key practice areas include:
- Corporate: Mergers and acquisitions, private equity, joint ventures, and corporate governance.
- Finance and Banking: Banking transactions, project finance, structured finance, and regulatory advice.
- Dispute Resolution: Commercial litigation, international arbitration, regulatory investigations, and white-collar crime.
- Capital Markets: Debt and equity capital markets, derivatives, and securitisation.
- Employment: Employment law advice, executive compensation, and pensions.
- Competition: Antitrust compliance, merger control, and competition law disputes.
- Intellectual Property: IP transactions, licensing agreements, and IP litigation.
- Commercial Property / Real Estate: Property acquisitions, development projects, and real estate finance.
- Tax: Corporate tax planning, international tax advice, and tax disputes.
Sector Strengths
A&O Shearman has developed strong sector-specific expertise in key industries, including:
- Financial Institutions: Advising banks, asset managers, and insurance companies on regulatory matters, transactions, and disputes.
- Energy and Natural Resources: Supporting clients in oil and gas, renewable energy, and mining sectors with project finance and regulatory compliance.
- Technology and Telecommunications: Assisting technology companies and telecom providers with M&A, data protection, and regulatory issues.
- Pharmaceuticals and Healthcare: Providing legal counsel on regulatory compliance, M&A transactions, and intellectual property matters.
- Consumer Goods and Retail: Advising retail and consumer goods companies on corporate transactions, competition law, and supply chain management.
Example Clients
A&O Shearman advises a prestigious roster of clients, including:
- HSBC: Providing legal support on banking transactions, regulatory compliance, and disputes.
- Shell: Advising on energy projects, joint ventures, and environmental compliance.
- Google: Assisting with regulatory issues, data protection, and intellectual property matters.
- GlaxoSmithKline: Advising on pharmaceutical developments, regulatory compliance, and litigation.
- Unilever: Handling corporate governance, M&A transactions, and competition law matters.
Latest Turnover and Headcount Figures
As of the latest financial year, A&O Shearman reported a turnover of £2.5 billion. The firm employs over 7,000 people globally, including approximately 3,500 lawyers and 600 partners, reflecting its substantial presence and resources within the legal industry.
Company History
A&O Shearman was formed through a strategic alliance between Allen & Overy, a leading UK-based law firm, and Shearman & Sterling, a prominent US-based law firm known for its international reach and corporate expertise. The alliance leverages the strengths and resources of both firms to provide seamless cross-border legal services to multinational clients. A&O Shearman continues to build on its legacy of excellence, innovation, and client service, maintaining a strong presence in major financial centres worldwide.
Training & Careers
A&O Shearman is committed to nurturing talent and offering career development opportunities:
- Training Contracts: Comprehensive training programmes that offer exposure to various practice areas and international assignments.
- Summer Internships: Providing students with practical experience and insights into the firm’s culture and legal practice.
- Continuing Professional Development: Ensuring lawyers receive ongoing training and support to enhance their skills and knowledge.
- Diversity and Inclusion: Promoting diversity within the firm through initiatives and support networks.
Awards & Recognition
A&O Shearman has received numerous accolades for its legal expertise and commitment to excellence:
- Chambers and Partners: Recognised as a top-tier firm in multiple practice areas and jurisdictions.
- Legal 500 UK Awards: Commended for excellence in corporate law, finance, and dispute resolution.
- Financial Times Innovative Lawyers Awards: Acknowledged for innovative approaches to legal service delivery and client solutions.
- Global Legal Awards: Honoured for its role in significant international transactions and complex legal matters.
Example Reviews
A&O Shearman garners praise from clients and industry professionals:
- Client Review: “A&O Shearman delivers exceptional legal advice with a deep understanding of our business needs. Their responsiveness and strategic insights are invaluable.”
- Industry Peer Review: “A&O Shearman stands out for its global reach and sector expertise. They are a trusted partner for navigating complex legal challenges.”
- Employee Review: “Working at A&O Shearman has been a rewarding experience. The firm’s commitment to professional development and inclusive culture create a supportive environment for growth.”
In summary, international law firm A&O Shearman combines the strengths of Allen & Overy and Shearman & Sterling to offer unparalleled legal expertise, sector-specific knowledge, and a commitment to client success on a global scale.
HQ Address:
One Bishops Square, E1 6AD, UK
Tel: +44 20 3088 0000
www.aoshearman.com