Sullivan & Cromwell LLP

Sullivan & Cromwell LLP is one of the world's most prestigious international law firms, founded in 1879 and headquartered in New York's Financial District. With more than 140 years of legal excellence, S&C has established itself as a leader across all its core practice areas, consistently setting the standard for modern legal practice.

Core Services & Practice Areas

S&C operates as a unified global partnership providing comprehensive legal services across major practice areas including mergers and acquisitions, capital markets, banking and financial services regulation, litigation and enforcement, restructuring, tax, real estate, and intellectual property. The firm is particularly renowned for its work in complex cross-border transactions and high-stakes litigation.

The firm has pioneered several specialized practice groups to meet emerging client needs, including a premier Digital Assets practice that advises on blockchain, digital currencies, and cryptocurrency matters, and a leading Digital Infrastructure practice that has advised on over $1 trillion in transactions involving AI compute, data centers, and energy infrastructure. S&C's Artificial Intelligence practice group provides cutting-edge counsel on AI-related legal and regulatory issues.

Key Strengths & Market Position

S&C's success derives from the exceptional quality and breadth of training provided to its lawyers, who develop deep expertise as generalists within broad practice areas. The firm operates as a single partnership without geographic division, enabling seamless collaboration across its global network of 13 offices spanning four continents.

The firm has been involved in some of history's most significant corporate and financial transactions, from the formation of Edison General Electric Company in 1882 and United States Steel Corporation in 1901, to representing OpenAI in its landmark partnerships with Microsoft, AWS, Google Cloud, and other major technology companies. S&C advised on xAI's historic $250 billion merger with SpaceX, numerous multi-billion dollar AI compute and infrastructure deals, and major digital asset and blockchain transactions.

Notable Clients & Recognition

S&C's client base is exceptionally diverse and nearly evenly divided between U.S. and international entities, including Fortune 500 companies, major financial institutions, private equity funds, technology companies, governments, and high-net-worth individuals. Recent high-profile engagements include representing OpenAI, Broadcom, Tesla, AT&T, SoftBank, and numerous leading financial institutions.

The firm has received consistent recognition as a leader in fintech, digital assets, corporate law, and M&A. S&C was awarded Law360's 'Practice Group of the Year' for both Tax and Fintech in 2026, and has been repeatedly recognized by Chambers, The American Lawyer, and Financial Times for its innovative legal work.

Global Presence & Expertise

With offices in New York, Washington D.C., Los Angeles, Palo Alto, London, Paris, Brussels, Frankfurt, Tokyo, Hong Kong, Beijing, Sydney, and Melbourne, S&C maintains a truly global practice while retaining its commitment to operating as a unified firm. The firm staffs its international offices with lawyers who have spent their careers at S&C, ensuring consistent quality and seamless service delivery across jurisdictions.

Why Choose Sullivan & Cromwell

Clients choose S&C for the firm's unparalleled combination of legal excellence, innovative thinking, and practical business judgment honed over more than 140 years. The firm's deep industry knowledge, particularly in financial services, technology, and emerging areas like digital assets and AI, combined with its ability to handle the most complex and high-stakes matters, makes it the go-to firm for companies at the forefront of the global economy. S&C's track record of achieving exceptional results on matters that shape industries and define legal precedent sets it apart as a model for the modern practice of law.