Sidley Overview
- Service
-
Law Firm
- Year Founded
-
1866

- Employees
-
4,862

- Serviced Companies
-
1,175
- Serviced Deals
-
1,356
- Serviced Investors
-
1,070
Sidley General Information
Description
Founded in 1866, Sidley Austin is a global law firm headquartered in Chicago, Illinois. The firm provides services in the areas of litigation, antitrust, criminal defence, patent, intellectual property, product liability, international commercial arbitration, dispute resolution, mergers, acquisitions, private equity, venture capital, bankruptcy, insurance, data security, project finance, infrastructure, securities, taxation, trusts, and international trade. The firm caters to various industries including, energy, agribusiness, financial services, real estate, investment funds, life sciences, and technology.
Contact Information
Website
www.sidley.comYear Founded
Corporate Office
- One South Dearborn
- Chicago, IL 60603
- United States
Sidley Services to Companies
Service on a Deal (1,356)
Sidley has provided services on 1356 deals. It last acted as a legal advisor to Aspen Insurance Holdings on a made for . The deal was made in 2025.
Company Name | Service Provided | Deal Date | Deal Type | Deal Amount |
---|---|---|---|---|
Aspen Insurance Holdings | Legal Advisor | May 2025 | ||
Beacon Roofing Supply | Legal Advisor | Apr 2025 | ||
Bagel | Legal Advisor | Apr 2025 | ||
Nourish | Legal Advisor | Apr 2025 | ||
Marvel Fusion | Legal Advisor | Mar 2025 | ||
W.R. Berkley | Legal Advisor | Mar 2025 | ||
3650 Capital | Legal Advisor | Mar 2025 | ||
Supira Medical | Legal Advisor | Mar 2025 | ||
Plenty | Legal Advisor | Mar 2025 | ||
Opus Genetics | Legal Advisor | Mar 2025 |
Sidley Services to Investors
Service on a Deal — Buy Side (2,135)
Sidley has provided buy side services on 2135 deals. It last acted as a legal advisor to Cantilever Group on a . The deal was made in 2025.
Investor Name | Service Provided | Deal Date | Deal Type | Deal Amount |
---|---|---|---|---|
Cantilever Group | Legal Advisor | May 2025 | ||
Lineage | Legal Advisor | Apr 2025 | ||
United Airlines Ventures | Legal Advisor | Apr 2025 | ||
U. S. Energy | Legal Advisor | Apr 2025 | ||
Ridgeview Partners | Legal Advisor | Apr 2025 | ||
8VC | Legal Advisor | Apr 2025 | ||
Bradford Airport Logistics | Legal Advisor | Apr 2025 | ||
Cal-Maine Foods | Legal Advisor | Apr 2025 | ||
Welltower | Legal Advisor | Apr 2025 | ||
Achieve Together | Legal Advisor | Mar 2025 |
Service on a Deal — Sell Side (400)
Sidley has provided sell side services on 400 deals. It last acted as a legal advisor to Whiptail Midstream on a made for . The deal was made in 2025.
Investor Name | Service Provided | Deal Date | Deal Type | Deal Amount |
---|---|---|---|---|
Whiptail Midstream | Legal Advisor | May 2025 | ||
Admiral Group | Legal Advisor | Apr 2025 | ||
D1 Capital Partners | Legal Advisor | Apr 2025 | ||
Arsenal Capital Partners | Legal Advisor | Apr 2025 | ||
United Airlines Holdings | Legal Advisor | Apr 2025 | ||
Apollo Global Management | Legal Advisor | Mar 2025 | ||
The Cigna Group | Legal Advisor | Mar 2025 | ||
The Cigna Group | Legal Advisor | Mar 2025 | ||
Castle Creek Capital | Legal Advisor | Feb 2025 | ||
Outrigger Energy | Legal Advisor | Feb 2025 |
Sidley Investment Preferences
Preferred Industries | Preferred Verticals | Preferred Deal Types | Geographic Preferences | Transaction Amount |
---|
Sidley Affiliates
Subsidiaries (1)
Name | Industry | Location | Year Founded |
---|---|---|---|
Sidley Austin Master Pension Trust | Chicago, IL |
Sidley FAQs
-
When was Sidley founded?
Sidley was founded in 1866.
-
Where is Sidley headquartered?
Sidley is headquartered in Chicago, IL.
-
What is the size of Sidley?
Sidley total number of employees/professionals is 4,862.
-
What service provider type is Sidley?
Sidley's service provider type is Law Firm.
-
What companies has Sidley invested in or acquired?
Sidley has invested in or acquired Airee.
-
What are Sidley subsidiaries?
Sidley Austin Master Pension Trust is a subsidiary of Sidley.
Data Transparency
-
Meet our data hygiene team
Discover how our experts ensure you’re getting the most accurate financial data in the industry.
Read blog » -
How PitchBook sources data
Our data operations team has logged over 3.5 million hours researching, organizing, and integrating the information you need most.
Discover our process »