Sidley Overview

  • Service
  • Law Firm

  • Year Founded
  • 1866

Year Founded

  • Employees
  • 4,862

Employees

  • 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.com
Formerly Known As
Sidley Austin Brown & Wood
Year Founded
1866
Service Provider Type
Law Firm
Corporate Office
  • One South Dearborn
  • Chicago, IL 60603
  • United States
+1 (312)

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
You’re viewing 10 of 1,356 services to companies. Get the full list »

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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
You’re viewing 10 of 2,135 services on a deal — buy side. Get the full list »

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
You’re viewing 10 of 400 services on a deal — sell side. Get the full list »

Sidley Investment Preferences

Preferred Industries Preferred Verticals Preferred Deal Types Geographic Preferences Transaction Amount

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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.

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