Sidley Austin LLP
Get verified emails for Sidley Austin LLP employeesAbout Sidley Austin LLP
Sidley Austin LLP is a law firm founded in 1866 and based in Chicago, Illinois. The firm has approximately 2,300 lawyers. That is a long record. With more than 160 years of experience, it advises clients on complex transactional, restructuring, crisis management, investigation, regulatory, and litigation matters.
Clients are served through 21 offices in major commercial, regulatory, and financial centers around the world, including locations in the United States, Europe, and Asia-Pacific. Lawyers and business professionals work across borders and speak more than 75 languages, which supports matters that require international reach and cultural awareness.
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Insights
Updated 21 Aug 2026Sidley Austin LLP appears active in large-scale M&A and infrastructure-related transactions. A recent example is its representation of MarineMax in the US$1.5 billion sale to Blackstone Infrastructure portfolio company Safe Harbor. That deal points to the firm competing at the high end of deal work, and it keeps Sidley visible in matters involving major sponsors and strategic buyers.
Recent firm news points to a steady emphasis on transactional advisory work. The focus seems to be on complex, high-value corporate deals, which suggests a deliberate effort to stay strong in deal execution and to serve clients in capital-intensive sectors and sponsor-led transactions.
Investor and market sentiment signals are indirect, but they lean positive. A US$1.5 billion transaction is a clear marker of activity and scale, and Sidley’s decision to promote the matter on its news landing page shows it is using marquee deals to reinforce market positioning and signal momentum.
Frequently asked questions
Sidley Austin LLP is headquartered in Chicago, Illinois, United States.
Sidley Austin LLP has 1001-5000 employees according to its company profile.
Sidley Austin LLP operates in the Law Practice sector. Public valuation figures are not always disclosed for private companies.