What Does Sidley Austin LLP Do?

Total employees4928
HeadquartersChicago
Founded1866

Sidley Austin LLP is a preeminent global law firm with a rich history spanning over 150 years. The firm provides a broad spectrum of legal services to a diverse client base, including multinational corporations, financial institutions, emerging enterprises, and governmental bodies. Sidley is highly regarded for its formidable capabilities in litigation, transactional law (including M&A, private equity, and capital markets), and regulatory matters across various industries like life sciences, energy, and technology.

Where Is Sidley Austin LLP's Headquarters?

Sidley Austin LLP officeSidley Austin LLP officeSidley Austin LLP officeSidley Austin LLP office
*Images sourced via web search. Rights belong to original owners

HQ Function

The Chicago headquarters serves as the nerve center for global operations, housing key administrative departments, senior firm leadership, and a substantial contingent of lawyers practicing across diverse legal disciplines.

Notable Features:

Located within a modern skyscraper in Chicago's Loop district, the office boasts state-of-the-art facilities, advanced technological infrastructure, and impressive views of the city. The design emphasizes collaborative workspaces and client-centric amenities.

Work Culture:

Sidley Austin's headquarters fosters a work culture that is intellectually rigorous, collaborative, and geared towards high performance. There is a strong emphasis on teamwork, mentorship, continuous professional development, and an unwavering commitment to client service and legal excellence.

HQ Significance:

As the firm's founding office, the Chicago headquarters symbolizes Sidley Austin's deep historical roots and its evolution from a local practice to a global legal powerhouse. It remains a cornerstone of the firm's identity and strategic operations.

Values Reflected in HQ: The headquarters' design, functionality, and atmosphere reflect Sidley's core values of excellence, integrity, collaboration, innovation, and a deep-seated commitment to its clients and community.

Location:

Sidley Austin provides comprehensive legal support across the globe. Key functions include complex transactional work (M&A, private equity, capital markets), high-stakes litigation and international arbitration, regulatory counseling across diverse industries (such as financial services, life sciences, energy, and technology), intellectual property protection and litigation, international trade, and corporate restructuring. The firm's integrated global network ensures seamless, high-quality service for multinational clients wherever they operate.

Street Address:

One South Dearborn Street

City:

Chicago

State/Province:

Illinois

Country:

USA

Where Else Does Sidley Austin LLP Operate Around the World?

New York, New York/USA

Address: 787 Seventh Avenue, New York, NY 10019

Serves as a critical center for U.S. East Coast operations and a primary conduit for international business, linking clients to Sidley's extensive global network.

London, UK

Address: 70 St Mary Axe, London EC3A 8BE, United Kingdom

Functions as a major hub for EMEA (Europe, Middle East, and Africa) activities, facilitating complex cross-border transactions and international arbitration for a global clientele.

Hong Kong, Hong Kong SAR

Address: Level 39, Two International Finance Centre, 8 Finance Street, Central, Hong Kong

Acts as a strategic base for clients operating in Greater China and the broader Asia-Pacific, navigating the unique legal and commercial landscapes of the region.

Los Angeles, California/USA

Address: 555 West Fifth Street, Suite 4000, Los Angeles, CA 90013

Supports clients throughout California and the Pacific Rim, combining deep local market insight with the firm's global resources and expertise.

Buying Intent Signals for Sidley Austin LLP

Highperformr Signals uncover buying intent and give you clear insights to target the right accounts at the right time — helping your sales, marketing, and GTM teams close more deals, faster.

Notable news
Hiring actively
Corporate Finance
Corporate Finance
Corporate Finance
Corporate Finance
Corporate Finance
*Example signal, not calculated in real time

Who's Leading Sidley Austin LLP? Meet the Executive Team

As of April 2025, Sidley Austin LLP' leadership includes:

Yvette Ostolaza - Chair of the Management Committee
Michael J. Schmidtberger - Chair of the Executive Committee
Jaime A. Gullen - Chief Operating Officer
Jennifer L. Smith - Chief Financial Officer

Who's Investing in Sidley Austin LLP?

Sidley Austin LLP has been backed by several prominent investors over the years, including:

Not Applicable (Sidley Austin is a private partnership and does not have external equity investors in the traditional corporate sense).

What Leadership Changes Has Sidley Austin LLP Seen Recently?

Hire1
Exits0

In the past year, a key leadership transition at Sidley Austin involved Michael J. Schmidtberger assuming the role of Chair of the firm's Executive Committee. While C-suite level changes are infrequent, the firm continuously strengthens its senior leadership through strategic partner promotions and lateral hires into global practice leadership and committee roles.

New Appointments:

Michael J. Schmidtberger, Michael J. Schmidtberger appointed as the new Chair of Sidley's Executive Committee, taking over from the previous chair.

What Technology (Tech Stack) Is Used bySidley Austin LLP?

Discover the tools Sidley Austin LLP uses. Highperformr reveals the technologies powering your target accounts — helping your sales, marketing, and GTM teams prioritize smarter and close faster.

Sidley Austin LLP Email Formats and Examples

Sidley Austin typically utilizes an email format that combines the first initial of an employee's first name with their full last name, followed by the @sidley.com domain. This is a common and generally reliable format for contacting individuals at the firm.

flast@sidley.com

Format

jsmith@sidley.com

Example

90%

Success rate

What's the Latest News About Sidley Austin LLP?

Sidley Austin Press ReleaseMay 13, 2024

Sidley Austin Welcomes Leading Energy Transactions Partner Heather Palmer in Houston

Sidley Austin announced the addition of Heather Palmer as a partner in its Houston office. Palmer joins the firm's prominent Energy and Infrastructure practice, significantly bolstering its capabilities in complex energy transactions....more

Sidley Austin Press ReleaseApril 30, 2024

Sidley Austin Represents Buyers in Acquisition of Coherent’s Detector Business

A Sidley Austin team advised the buyers in their acquisition of Coherent Corp.'s detector business for approximately US$20 million. This transaction highlights the firm's M&A expertise within the technology sector....more

Sidley Austin Press ReleaseMarch 28, 2024

Sidley Austin Wins Four Awards at The M&A Advisor’s 18th Annual Turnaround Awards

Sidley Austin received four prestigious awards at The M&A Advisor’s 18th Annual Turnaround Awards. These accolades recognize the firm's outstanding achievements and excellence in restructuring and distressed M&A transactions....more

Highperformr's free tools for company research

Explore Employees by Region or Country

See where a company’s workforce is located, by country or region.

View Funding Details

View past and recent funding rounds with amounts and investors.

Understand Revenue Insights

Understand company revenue estimates and financial scale.

Track Active Job Openings

Track active roles and hiring trends to spot growth signals.

Review Product and Offerings

Discover what a company offers—products, platforms, and solutions.

Get SIC or NAICS Codes

Get the company’s official SIC and NAICS classifications.

Analyze Website Traffic Trends

Analyze visitor volume, engagement, and top traffic sources.

Discover Social Profiles and Engagement

Explore LinkedIn, Twitter, and other active social profiles.

Identify Top Competitors

Identify top competitors based on similar business traits.

Research and Discover Companies with Highperformr — Smarter, Faster

Explore companies in depth — from the tech they use to recent funding, hiring trends, and buyer signals — all in one powerful view.

Highperformr AI helps you surface the right accounts and enrich your CRM with verified company and contact insights, so your teams can prioritize and engage faster.

  • Track intent signals to find buyers who are actively in-market
  • Enrich contacts and companies instantly, no need to switch tools
  • Automate workflows to stay ahead of every change
  • Connect your CRM & tools for seamless data sync and activation

Thousands of companies, including Sidley Austin LLP, are just a search away.