Sullivan & Cromwell
| Headquarters | 125 Broad Street New York, NY 10004 United States |
|---|---|
| No. of offices | 13 total, 9 international |
| No. of attorneys | 840 (2024) |
| Major practice areas | General practice |
| Key people |
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| Revenue | $2 billion (2024) |
| Date founded | 1879 |
| Founder | Algernon Sydney Sullivan William Nelson Cromwell |
| Company type | Limited liability partnership |
| Website | sullcrom |
Sullivan & Cromwell LLP is an American multinational law firm headquartered in New York City. It was founded in 1879 by Algernon Sydney Sullivan and William Nelson Cromwell.
Sullivan & Cromwell has handled landmark deals, including SpaceX and xAI’s $250 billion merger in 2026, Capital One’s $35 billion acquisition of Discover in 2025, and Ford Motor Company's $643 million offering in 1956, and has adapted to evolving business trends by establishing dedicated banking and mergers and acquisitions units.
Internationally, the firm has a long history of involvement, from financing America's infrastructure to advising the Panama Canal Authority. It was among the first U.S. firms to open overseas offices, although its history includes controversial actions such as aiding Nazi Germany's arms buildup and involvement in the 1954 Guatemalan coup d'état.
Sullivan & Cromwell's lawyers have been involved in various controversies, including insider trading scandals, work with tobacco companies, criticism for its role in the FTX cryptocurrency exchange collapse and the political background checks of candidates. In 2025, the law firm played a role in the targeting of law firms and lawyers under the second Trump administration and represents President Donald Trump in his appeal of his criminal conviction in New York State court.