United States


Sidley Austin LLP traces its genesis in the United States to the firm’s founding office in Chicago, which opened in 1866. Early prominent clients included first lady Mary Todd Lincoln, then the widow of President Abraham Lincoln, the Pullman Company, the manufacturer of specialty sleeping railway cars and Western Union Telegraph Company. The firm began expanding beyond its Chicago roots in the mid 1940s, and today has offices in financial and regulatory centers across the globe. Our U.S. offices now include Boston, Century City, Chicago, Dallas, Houston, Los Angeles, New York, Palo Alto, San Francisco and Washington, D.C.

The firm provides premier legal services to all types of companies in all stages of development—from fledgling start-ups to Fortune 500 corporations. We represent U.S. clients from a multitude of industries, financial institutions and the government.

Sidley’s leadership on behalf of clients hasn't gone unnoticed. For the fifth consecutive year, and each year since the survey’s inception, Sidley has received the most first-tier national rankings in the 2015 U.S. News – Best Lawyers® “Best Law Firms” survey.

Beyond its deep reserve of talent, Sidley’s ingrained culture of teamwork is evident in its interactions with clients. BTI, a Boston-based research and consulting firm, has named Sidley as one of only three firms to place on The BTI Client Service 30 list for 14 consecutive years. Sidley has been recognized every year since the inception of those rankings in 2001.

Sidley has been widely recognized for its pro bono and diversity programs. Working Mother and Flex-Time Lawyers have named Sidley one of the 2014 “50 Best Law Firms for Women,” and the firm received a perfect score of 100 percent on the Human Rights Campaign’s 2015 Corporate Equality Index (CEI). Sidley also was recognized as one of Law360’s “Pro Bono Firms of 2014,” and was named to The National Law Journal’s 2015 “Pro Bono Hot List.”

Sidley Austin LLP traces its genesis in the United States to the firm’s founding office in Chicago, which opened in 1866. Early prominent clients included first lady Mary Todd Lincoln, then the widow of President Abraham Lincoln, the Pullman Company, the manufacturer of specialty sleeping railway cars and Western Union Telegraph Company. The firm began expanding beyond its Chicago roots in the mid 1940s, and today has offices in financial and regulatory centers across the globe. Our U.S. offices now include Boston, Century City, Chicago, Dallas, Houston, Los Angeles, New York, Palo Alto, San Francisco and Washington, D.C.

The firm provides premier legal services to all types of companies in all stages of development—from fledgling start-ups to Fortune 500 corporations. We represent U.S. clients from a multitude of industries, financial institutions and the government.

Sidley’s leadership on behalf of clients hasn't gone unnoticed. For the fifth consecutive year, and each year since the survey’s inception, Sidley has received the most first-tier national rankings in the 2015 U.S. News – Best Lawyers® “Best Law Firms” survey.

Beyond its deep reserve of talent, Sidley’s ingrained culture of teamwork is evident in its interactions with clients. BTI, a Boston-based research and consulting firm, has named Sidley as one of only three firms to place on The BTI Client Service 30 list for 14 consecutive years. Sidley has been recognized every year since the inception of those rankings in 2001.

Sidley has been widely recognized for its pro bono and diversity programs. Working Mother and Flex-Time Lawyers have named Sidley one of the 2014 “50 Best Law Firms for Women,” and the firm received a perfect score of 100 percent on the Human Rights Campaign’s 2015 Corporate Equality Index (CEI). Sidley also was recognized as one of Law360’s “Pro Bono Firms of 2014,” and was named to The National Law Journal’s 2015 “Pro Bono Hot List.”