Jan 29, 2025 · S&C is a global law firm that advises on corporate transactions and investigations, and restructuring, regulatory, tax and estate planning matters.

Sullivan & Cromwell LLP provides the highest quality legal advice and representation to clients around the world. The results the Firm achieves have set it apart for more than 140 years and have become a model for the modern practice of law.

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Throughout its long history, Sullivan & Cromwell has been involved in some of America’s greatest industrial, commercial and financial enterprises. In 1879, Algernon Sydney Sullivan and William Nelson Cromwell founded Sullivan & Cromwell in New York City’s renowned Financial District.

S&C has 13 offices across four continents.

Find contact information for Sullivan & Cromwell LLP's global offices, including phone numbers and addresses, across the Americas, Europe, Asia, and Australia.

Sullivan & Cromwell established its headquarters in New York City in 1879. Today, the office is situated in the heart of the Financial District, with more than 550 lawyers.

Founded in 1927, the Firm’s Paris office is the oldest of Sullivan & Cromwell’s European offices. S&C’s Paris-based team has complementary French and U.S. law practices, advises on some of the largest and most innovative transactions in France and throughout Europe and is consistently ranked as one of the leading firms in France.

Sullivan & Cromwell’s London office, established in 1972, is the second-largest office of the Firm. It serves as a natural focal point for English law advice, as well as for cross-border European and cross-continental transactions.

Established in 1977, Sullivan & Cromwell’s Washington, D.C. office provides clients with our hallmark multi-disciplinary approach enhanced by insider knowledge of the federal government and the numerous federal agencies based in D.C.