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
Also listed in
Hong Kong
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Events sponsored

Recently held

SuperReturn US West
Held · 14–15 September 2026 · Los Angeles · Informa Connect

Contact the team for this firm’s full sponsorship record.

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