Simpson Thacher & Bartlett LLP
Simpson Thacher & Bartlett LLP is a law firm headquartered in New York, New York, with 1,295 lawyers in the United States according to The Law360 400 (2026).
- Office
- New York, New York
- Website
- stblaw.com
- Practice areas
- Corporate law, Litigation, Mergers and acquisitions, Private equity, Regulatory
- Size
- 1,295 lawyers in the United StatesFirm-wide count, The Law360 400 (2026)
- Headquarters
- This office
- Traces its history to
- 1884
New York, New York
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About Simpson Thacher & Bartlett LLP
Simpson Thacher & Bartlett LLP is a law firm headquartered in New York, New York, with 1,295 lawyers in the United States according to The Law360 400 (2026). Its main areas of practice include corporate law, litigation, mergers and acquisitions, private equity and regulatory.
The directory lists 81 law firms in New York, Simpson Thacher & Bartlett LLP among them, and 711 across New York. By U.S. lawyer headcount, it ranks number 3 among the firms we list with an office in New York. Cahill Gordon & Reindel LLP is listed at nearly the same location.
More about the firm is on its website, stblaw.com.
Firm profile
Law firm headquartered at 425 Lexington Avenue in New York City, organized as Simpson, Thacher & Barnum in 1884. It has about 1,500 attorneys in 13 offices and concentrates on litigation and corporate work, notably M&A and private equity.
Simpson Thacher & Bartlett LLP traces its history to 1884.
Source: en.wikipedia.org
Areas of practice
- Corporate law
- Litigation
- Mergers and acquisitions
- Private equity
- Regulatory
From the firm's published profile.
Check a Lawyer's License in New York
Lawyers who practice in New York are licensed by NYS Office of Court Administration (OCA). Before you hire anyone at Simpson Thacher & Bartlett LLP, confirm that the lawyer is licensed and in good standing with its public lawyer search.
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Simpson Thacher & Bartlett LLP: Questions and Answers
- Where is Simpson Thacher & Bartlett LLP located?
- Simpson Thacher & Bartlett LLP is in New York, New York.
- How do I contact Simpson Thacher & Bartlett LLP?
- The firm's website is stblaw.com.
- What kind of law does Simpson Thacher & Bartlett LLP practice?
- Corporate law, Litigation, Mergers and acquisitions, Private equity and Regulatory. From the firm's published profile.
- How many lawyers does Simpson Thacher & Bartlett LLP have?
- Simpson Thacher & Bartlett LLP has 1,295 lawyers in the United States, according to The Law360 400 (2026). That count covers the whole firm, not only its New York office.
- Where is Simpson Thacher & Bartlett LLP headquartered?
- Simpson Thacher & Bartlett LLP is headquartered in New York, New York. This office is its headquarters.
- When was Simpson Thacher & Bartlett LLP founded?
- Simpson Thacher & Bartlett LLP traces its history to 1884, counting the oldest firm it grew from.
- Which law firms are near Simpson Thacher & Bartlett LLP?
- The closest firms in the directory are Cahill Gordon & Reindel LLP (same location), Cleary Gottlieb Steen & Hamilton LLP (same location) and Cravath, Swaine & Moore LLP (same location).
- How can I check that a lawyer at Simpson Thacher & Bartlett LLP is licensed?
- Lawyers in New York are licensed by NYS Office of Court Administration (OCA). Use its public lawyer search at iapps.courts.state.ny.us to confirm a lawyer is licensed and in good standing.
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Listing from © OpenStreetMap contributors, lawyer count from The Law360 400 (2026), last checked October 2026. LawFirmWebAgency is not affiliated with this firm, and a listing is not an endorsement or a measure of quality.
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