Company lists · Data refreshed September 2026
Top 25 Commercial litigation law firms based in Chicago, United States
RevenueBase identified 692 commercial litigation law firms headquartered in Chicago, United States as of September 2026 and tracks 36,325 professional contacts across them, including 21,824 with verified work emails and 18,530 with mobile numbers. New York is the largest hub.
This list covers commercial litigation law firms headquartered in Chicago, United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 8, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.
The 25 largest commercial litigation law firms based in Chicago, United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 8,449 contacts → | ||||
Partial evidence “As one of the world’s leading law firms, we serve a broad range of clients with market-leading practices in private equity, M&A and other complex corporate transactions…” Source: RevenueBase Database · checked Sep 8, 2026Thanks. The Data Team will review it. | |||||
| 2 | 4,177 contacts → | ||||
Partial evidence “Mayer Brown is a leading international law firm, positioned to represent the world’s major corporations, funds and financial institutions in their most important and complex…” Source: RevenueBase Database · checked Sep 8, 2026Thanks. The Data Team will review it. | |||||
| 3 | 2,215 contacts → | ||||
Indirect evidence “On June 1, 2026, Winston & Strawn and Taylor Wessing’s U.K-led business officially launched as a single combined firm, creating Winston Taylor.” Source: RevenueBase Database · checked Sep 8, 2026Thanks. The Data Team will review it. | |||||
| 4 | 2,167 contacts → | ||||
Indirect evidence “High stakes.” Source: RevenueBase Database · checked Sep 8, 2026Thanks. The Data Team will review it. | |||||
| 5 | 1,495 contacts → | ||||
Partial evidence “Katten is a full-service law firm with nearly 650 attorneys in locations across the United States and in London and Shanghai.” Source: RevenueBase Database · checked Sep 8, 2026Thanks. The Data Team will review it. | |||||
| 6 | 1,194 contacts → | ||||
Indirect evidence “At Jenner & Block, we shape what’s next through experience, vision, and judgment.” Source: RevenueBase Database · checked Sep 8, 2026Thanks. The Data Team will review it. | |||||
| 7 | 1,188 contacts → | ||||
Partial evidence “Hinshaw & Culbertson LLP is a U.S-based law firm with offices nationwide.” Source: RevenueBase Database · checked Sep 8, 2026Thanks. The Data Team will review it. | |||||
| 8 | 579 contacts → | ||||
Strong evidence “As a national law firm defending corporations, non-profits, associations and their officers & directors in every manner of litigation, O'Hagan Meyer provides individualized…” Source: RevenueBase Database · checked Sep 8, 2026Thanks. The Data Team will review it. | |||||
| 9 | 565 contacts → | ||||
Partial evidence “Chapman is a law firm focused on finance.” Source: RevenueBase Database · checked Sep 8, 2026Thanks. The Data Team will review it. | |||||
| 10 | 542 contacts → | ||||
Partial evidence “Amundsen Davis is a law firm comprised of over 250 attorneys headquartered in Chicago.” Source: RevenueBase Database · checked Sep 8, 2026Thanks. The Data Team will review it. | |||||
| 11 | 424 contacts → | ||||
Indirect evidence “Litchfield Cavo LLP began as a small firm of attorneys experienced in insurance and business defense matters.” Source: RevenueBase Database · checked Sep 8, 2026Thanks. The Data Team will review it. | |||||
| 12 | 353 contacts → | ||||
Partial evidence “Neal Gerber Eisenberg is a Chicago-based law firm whose attorneys share a culture of teamwork and devotion to personalized client service to advance our clients’ business…” Source: RevenueBase Database · checked Sep 8, 2026Thanks. The Data Team will review it. | |||||
| 13 | 311 contacts → | ||||
Strong evidence “Keller Postman LLC is a national law firm that represents a broad array of clients as plaintiffs in complex litigation at the trial and appellate levels.” Source: RevenueBase Database · checked Sep 8, 2026Thanks. The Data Team will review it. | |||||
| 14 | 297 contacts → | ||||
Indirect evidence “Schiff Hardin LLP is now ArentFox Schiff.” Source: RevenueBase Database · checked Sep 8, 2026Thanks. The Data Team will review it. | |||||
| 15 | 288 contacts → | ||||
Indirect evidence “For more than 100 years Banner Witcoff has provided sound protection and inventive intellectual property solutions for some of the world’s most innovative organizations.” Source: RevenueBase Database · checked Sep 8, 2026Thanks. The Data Team will review it. | |||||
| 16 | 254 contacts → | ||||
Partial evidence “Formed in Levenfeld Pearlstein provides the sophisticated skills and resources of a big law firm with the personal attention of a small law firm.” Source: RevenueBase Database · checked Sep 8, 2026Thanks. The Data Team will review it. | |||||
| 17 | 254 contacts → | ||||
Indirect evidence “Swanson, Martin & Bell, LLP was founded in 1992 by a group of trial lawyers who left a large Chicago firm to better serve the needs of their clients.” Source: RevenueBase Database · checked Sep 8, 2026Thanks. The Data Team will review it. | |||||
| 18 | 250 contacts → | ||||
Indirect evidence “Barack Ferrazzano was founded in 1984 with a vision focused on delivering efficient, team-oriented services of the highest quality.” Source: RevenueBase Database · checked Sep 8, 2026Thanks. The Data Team will review it. | |||||
| 19 | 237 contacts → | ||||
Partial evidence “Tressler LLP is a national law firm headquartered in Chicago, with ten offices located in six states - California, Illinois, Missouri, New Jersey, New York and Pennsylvania.” Source: RevenueBase Database · checked Sep 8, 2026Thanks. The Data Team will review it. | |||||
| 20 | 232 contacts → | ||||
Partial evidence “Founded over 80 years ago, Clausen Miller represents businesses, insurers and professionals through strategic, cost-effective litigation and counseling across the nation and…” Source: RevenueBase Database · checked Sep 8, 2026Thanks. The Data Team will review it. | |||||
| 21 | 213 contacts → | ||||
Partial evidence “Marshall, Gerstein & Borun LLP has one focus - intellectual property law.” Source: RevenueBase Database · checked Sep 8, 2026Thanks. The Data Team will review it. | |||||
| 22 | 203 contacts → | ||||
Indirect evidence “We're Much.” Source: RevenueBase Database · checked Sep 8, 2026Thanks. The Data Team will review it. | |||||
| 23 | 186 contacts → | ||||
Strong evidence “Cassiday Schade is a litigation law firm headquartered in Chicago, with national presence.” Source: RevenueBase Database · checked Sep 8, 2026Thanks. The Data Team will review it. | |||||
| 24 | 182 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 8, 2026Thanks. The Data Team will review it. | |||||
| 25 | 162 contacts → | ||||
Partial evidence “McAndrews, Held & Malloy is a premier, full-service intellectual property and technology law firm.” Source: RevenueBase Database · checked Sep 8, 2026Thanks. The Data Team will review it. | |||||
RevenueBase Smart Search
RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: commercial litigation law firms. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.
- Strong evidence
- The company's own public description of its business names commercial litigation law firms.
- Partial evidence
- Its own public description names part of commercial litigation law firms, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name commercial litigation law firms. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.
RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.
Showing 25 of 692 commercial litigation law firms based in Chicago, United States
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Commercial litigation law firms based in Chicago, United States at a glance
As of Sep 8, 2026Companies by employee count
Freshness & accuracy
How recently the business emails were verified and the company information checked
Email last verified
Median 11.0dCompany record updated
Median 59.0dHow this list was built
Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among commercial litigation law firms, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
- What qualifies
- Companies headquartered in Chicago, United States whose own description of what they do matches “commercial litigation law firms”. Matching reads each company's description, not its industry code or its name.
- RevenueBase Smart Search
- RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names commercial litigation law firms), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
- What we exclude
- Companies whose own description does not clearly place them among commercial litigation law firms, and records with no verified work email. Companies headquartered outside Chicago are excluded even when they keep an office there.
- Match quality
- In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
- Ranking
- Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
- Verification
- Every listed company carries at least one verified work email, 21,824 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
- Refresh
- This page's figures were pulled from the company graph on September 8, 2026. Lists refresh periodically as the graph is re-checked.
- Corrections
- Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.
Commercial litigation law firms by metro in the United States
- Commercial litigation law firms in New York1410
- Commercial litigation law firms in Los Angeles724
- Commercial litigation law firms in Chicago673
- Commercial litigation law firms in Houston659
- Commercial litigation law firms in Atlanta455
- Commercial litigation law firms in Dallas439
- Commercial litigation law firms in Washington429
- Commercial litigation law firms in Miami399
Frequently asked
What is RevenueBase Smart Search?
RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names commercial litigation law firms, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.
How many commercial litigation law firms are there based in Chicago, United States?
RevenueBase identified 692 commercial litigation law firms headquartered in Chicago, United States as of September 2026, matched on each company's own description of what it does rather than its industry code.
What is the largest company on this list?
Kirkland & Ellis, headquartered in Chicago, tops this list with the largest team on record.
Which city has the most commercial litigation law firms?
New York leads with 1410 headquartered companies, followed by Los Angeles (724) and Chicago (673).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 21,824 verified decision-maker contacts tracked across these 692 companies.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 8, 2026.
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About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.
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