Legal, Compliance & Regulatory
Simpson Thacher & Bartlett
Verified 23 June 2026
White-shoe New York firm founded 1884; ~2,000 lawyers, Chambers Band 1 for private funds.
A New York-headquartered (425 Lexington Avenue) white-shoe firm founded in 1884, with approximately 2,000 lawyers across about 14 offices worldwide. Holds a Chambers Band 1 ranking for private-equity fund formation and advises leading sponsors including KKR, Blackstone, Carlyle, Apollo and Silver Lake; opened a Luxembourg funds office in 2025.
Every field below was confirmed against a public source on 23 June 2026. Verification is a check on the data, not an endorsement of the firm.
Jurisdiction
New York
Service line
Legal, Compliance & Regulatory
Head office
New York, US
Founded
1884
Size
Very large (1,000-5,000 staff)
Services
Private equity fund formation, Mergers & acquisitions, Capital markets, Banking & leveraged finance, Funds regulatory
Jurisdictions served
United States, United Kingdom, Luxembourg, Hong Kong, Japan
Client types
Private equity sponsors, Asset managers, Institutional investors, Financial institutions, Sovereign wealth funds
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