Company lists · Data refreshed September 2026
Top 25 Derivatives law firms based in Chicago, United States
RevenueBase identified 40 derivatives law firms headquartered in Chicago, United States as of September 2026 and tracks 8,900 professional contacts across them, including 5,053 with verified work emails and 4,328 with mobile numbers. New York is the largest hub.
This list covers derivatives 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 11, 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 derivatives law firms based in Chicago, United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 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 11, 2026Thanks. The Data Team will review it. | |||||
| 2 | 2,167 contacts → | ||||
Indirect evidence “High stakes.” Source: RevenueBase Database · checked Sep 11, 2026Thanks. The Data Team will review it. | |||||
| 3 | 1,188 contacts → | ||||
Partial evidence “Hinshaw & Culbertson LLP is a U.S-based law firm with offices nationwide.” Source: RevenueBase Database · checked Sep 11, 2026Thanks. The Data Team will review it. | |||||
| 4 | 565 contacts → | ||||
Partial evidence “Chapman is a law firm focused on finance.” Source: RevenueBase Database · checked Sep 11, 2026Thanks. The Data Team will review it. | |||||
| 5 | 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 11, 2026Thanks. The Data Team will review it. | |||||
| 6 | 101 contacts → | ||||
Partial evidence “BatesCarey LLP has dedicated its practice to protecting the interests of insurers and reinsurers while shaping the trends of insurance law throughout the United States and abroad.” Source: RevenueBase Database · checked Sep 11, 2026Thanks. The Data Team will review it. | |||||
| 7 | 53 contacts → | ||||
Partial evidence “Christensen Hsu Sipes LLP is a law firm with offices in Chicago, Northwest Indiana, Los Angeles, and Sacramento.” Source: RevenueBase Database · checked Sep 11, 2026Thanks. The Data Team will review it. | |||||
| 8 | 36 contacts → | ||||
Indirect evidence “Sperling & Slater has a nationwide and international practice focusing on complex commercial and business disputes.” Source: RevenueBase Database · checked Sep 11, 2026Thanks. The Data Team will review it. | |||||
| 9 | 35 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 11, 2026Thanks. The Data Team will review it. | |||||
| 10 | 18 contacts → | ||||
Partial evidence “Harris Winick Harris LLP is a boutique commercial law firm formed by a core group of talented attorneys with over 100 years of collective experience representing clients locally…” Source: RevenueBase Database · checked Sep 11, 2026Thanks. The Data Team will review it. | |||||
| 11 | 17 contacts → | ||||
Indirect evidence “Noonan & Lieberman is a boutique firm with decades of collective experience in representing financial institutions, real estate investors, and business clients.” Source: RevenueBase Database · checked Sep 11, 2026Thanks. The Data Team will review it. | |||||
| 12 | 16 contacts → | ||||
Indirect evidence “Practical, cost-effective, and responsive - we bring decades of experience resolving and litigating disputes, coupled with an understanding of the challenges facing today’s…” Source: RevenueBase Database · checked Sep 11, 2026Thanks. The Data Team will review it. | |||||
| 13 | 16 contacts → | ||||
Partial evidence “Goldstein & McClintock is a restructuring, finance & corporate law firm with 11 offices across the U.S, comprised of top professionals with decades of experience at some of the…” Source: RevenueBase Database · checked Sep 11, 2026Thanks. The Data Team will review it. | |||||
| 14 | 10 contacts → | ||||
Partial evidence “Kozacky Weitzel McGrath, P.C, a full service, AV-Rated law firm focusing on business related litigation.” Source: RevenueBase Database · checked Sep 11, 2026Thanks. The Data Team will review it. | |||||
| 15 | 10 contacts → | ||||
Partial evidence “Koya Law LLC is a boutique law firm representing trading and investment firms in the negotiation, evaluation, and documentation of complex trading and financing arrangements.” Source: RevenueBase Database · checked Sep 11, 2026Thanks. The Data Team will review it. | |||||
| 16 | 7 contacts → | ||||
Indirect evidence “A firm of highly-skilled, award-winning lawyers committed to providing strategic transactional advice and aggressive advocacy.” Source: RevenueBase Database · checked Sep 11, 2026Thanks. The Data Team will review it. | |||||
| 17 | 7 contacts → | ||||
Indirect evidence “For over 22 years, Jaffe & Berlin has been representing clients big and small.” Source: RevenueBase Database · checked Sep 11, 2026Thanks. The Data Team will review it. | |||||
| 18 | 5 contacts → | ||||
Indirect evidence “Lewitas Hyman PC (now known as Hyman Cotter PC) provided nationwide advisory and litigation counsel to clients in the financial services industry on employment and investment loss…” Source: RevenueBase Database · checked Sep 11, 2026Thanks. The Data Team will review it. | |||||
| 19 | 4 contacts → | ||||
Indirect evidence “Longtime friends and colleagues, Larry Landsman, Rich Saldinger and Rob Carroll have joined together to form a new premier business litigation firm in Chicago.” Source: RevenueBase Database · checked Sep 11, 2026Thanks. The Data Team will review it. | |||||
| 20 | 4 contacts → | ||||
Indirect evidence “Jeremy S.” Source: RevenueBase Database · checked Sep 11, 2026Thanks. The Data Team will review it. | |||||
| 21 | 3 contacts → | ||||
Indirect evidence “Our attorneys quickly attack our clients’ issues including structuring deals, rendering advice, negotiating transactions, providing litigation, criminal defense, civil plaintiff…” Source: RevenueBase Database · checked Sep 11, 2026Thanks. The Data Team will review it. | |||||
| 22 | 3 contacts → | ||||
Partial evidence “Acumen is a boutique law firm that serves clients in business and intellectual property law, commercial litigation, and consumer matters.” Source: RevenueBase Database · checked Sep 11, 2026Thanks. The Data Team will review it. | |||||
| 23 | 2 contacts → | ||||
Partial evidence “Leon Zelechowski, Ltd, founded in 1988, is a Chicago law firm dedicated to providing clients with the highest quality, responsive legal representation.” Source: RevenueBase Database · checked Sep 11, 2026Thanks. The Data Team will review it. | |||||
| 24 | 1 contacts → | ||||
Partial evidence “The Quinlan Law Firm, LLC is a commercial litigation boutique with offices in Chicago, Illinois and Phoenix, Arizona.” Source: RevenueBase Database · checked Sep 11, 2026Thanks. The Data Team will review it. | |||||
| 25 | 1 contacts → | ||||
Indirect evidence “After working as a Senior Trial Attorney for the Commodity Futures Trading Commission’s (CFTC) Division of Enforcement from 1977-1980, Peter has been advising clients about…” Source: RevenueBase Database · checked Sep 11, 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: derivatives 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 derivatives law firms.
- Partial evidence
- Its own public description names part of derivatives law firms, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name derivatives 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 40 derivatives law firms based in Chicago, United States
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Derivatives law firms based in Chicago, United States at a glance
As of Sep 11, 2026Companies by employee count
Freshness & accuracy
How recently the business emails were verified and the company information checked
Email last verified
Median 13.0dCompany record updated
Median 68.5dHow 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 derivatives 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 “derivatives 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 derivatives 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 derivatives 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, 5,053 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 11, 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.
Derivatives law firms by metro in the United States
- Derivatives law firms in New York110
- Derivatives law firms in Chicago36
- Derivatives law firms in Houston29
- Derivatives law firms in Los Angeles26
- Derivatives law firms in Dallas25
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 derivatives 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 derivatives law firms are there based in Chicago, United States?
RevenueBase identified 40 derivatives 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?
Mayer Brown, headquartered in Chicago, tops this list with the largest team on record.
Which city has the most derivatives law firms?
New York leads with 110 headquartered companies, followed by Chicago (36) and Houston (29).
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 5,053 verified decision-maker contacts tracked across these 40 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 11, 2026.
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Derivatives law firms by geography
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- Derivatives law firms based in Italy
- Derivatives law firms based in the United Kingdom
- Derivatives law firms based in Australia
- Derivatives law firms based in Mexico
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- Derivatives law firms based in Poland
- Derivatives law firms based in Canada
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.