Company lists · Data refreshed September 2026
Top 25 Professional liability defense law firms based in the United States
RevenueBase identified 3,041 professional liability defense law firms headquartered in the United States as of September 2026 and tracks 65,612 professional contacts across them, including 35,447 with verified work emails. New York is the largest hub.
This list covers professional liability defense law firms headquartered in the 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 29, 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 professional liability defense law firms based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 2,649 contacts → | ||||
Partial evidence “Wilson Elser is the preeminent defense litigation firm in the United States.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 2 | 2,012 contacts → | ||||
Strong evidence “Established in 1897, Nelson Mullins is an Am Law 100 firm of more than attorneys, policy advisors and professionals with 33 offices in 17 states and Washington, D.C.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 3 | 1,167 contacts → | ||||
Indirect evidence “Stinson LLP collaborates with clients ranging from individuals and privately held enterprises to national companies and international public corporations.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 4 | 1,147 contacts → | ||||
Indirect evidence “Welcome to our company page!” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 5 | 1,068 contacts → | ||||
Partial evidence “Over the past 25 years, QPWB is one of the fastest-growing law firms in the US.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 6 | 815 contacts → | ||||
Partial evidence “Established in 1989, Hall Booth Smith, P.C.(HBS) is a full-service law firm with 33 offices across the United States.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 7 | 738 contacts → | ||||
Partial evidence “Providing a Spectrum of Healthcare Liability and Other Insurance Solutions … and More ProAssurance’s group of insurance companies specializes in providing the full spectrum of…” Source: RevenueBase Database · checked Sep 29, 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 29, 2026Thanks. The Data Team will review it. | |||||
| 9 | 576 contacts → | ||||
Partial evidence “MGC is a metrics-driven law built specifically to serve the insurance industry, their insureds and self-insureds.#MGCLaw #TeamMGC” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 10 | 537 contacts → | ||||
Partial evidence “Bowman and Brooke LLP is a nationally recognized trial firm with one of the largest product liability practices in the country.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 11 | 537 contacts → | ||||
Indirect evidence “A firm of internationally recognized trial lawyers, crisis managers, and strategic advisors known for our creative, aggressive, and efficient pursuit of success for our clients.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 12 | 524 contacts → | ||||
Partial evidence “MagMutual is a liability insurance provider and healthcare consultancy working to protect and support physicians and healthcare organizations.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 13 | 519 contacts → | ||||
Partial evidence “Robins Kaplan LLP is among the nation’s premier trial law firms, with more than 200 attorneys in Bismarck, N.D; Boston; Los Angeles; Minneapolis; New York; Silicon Valley; and…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 14 | 513 contacts → | ||||
Indirect evidence “Thompson Coe has been providing legal services to clients both regionally and nationally for more than 70 years.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 15 | 456 contacts → | ||||
Indirect evidence “Tyson & Mendes’ goal is to achieve justice for all through innovation, collaboration, and outstanding service.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 16 | 424 contacts → | ||||
Partial evidence “Litchfield Cavo LLP began as a small firm of attorneys experienced in insurance and business defense matters.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 17 | 400 contacts → | ||||
Indirect evidence “21 Offices | 11 States | 1 Firm Dickie, McCamey & Chilcote, P.C.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 18 | 357 contacts → | ||||
Indirect evidence “Our Commitment The Mission of Cipriani & Werner, P.C.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 19 | 356 contacts → | ||||
Partial evidence “Our verdicts tell the story.™ Luks and Santaniello, LLC is a Corporate and Insurance Defense Litigation firm committed to securing equal justice in the courtroom for…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 20 | 329 contacts → | ||||
Indirect evidence “Butler is a civil litigation firm.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 21 | 328 contacts → | ||||
Partial evidence “Galloway Johnson Tompkins Burr & Smith stands ready as a premier corporate defense and litigation firm in the Gulf South and Midwest to be your strategic advisor.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 22 | 311 contacts → | ||||
Strong evidence “As a national defense law firm with more than 110 attorneys in offices from coast to coast, Foley Mansfield provides legal expertise, creative solutions and extensive trial…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 23 | 310 contacts → | ||||
Indirect evidence “With 130 trial lawyers across offices in Austin, Dallas, Houston, Los Angeles, Marshall, New York, and Washington, D.C, McKool Smith has established a reputation as one of…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 24 | 290 contacts → | ||||
Partial evidence “Hawkins Parnell & Young is a national defense litigation firm that has represented many of the largest and most well-known companies in high-risk litigation and business disputes.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 25 | 277 contacts → | ||||
Indirect evidence “Margolis Edelstein was founded in Philadelphia over 65 years ago.” Source: RevenueBase Database · checked Sep 29, 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: professional liability defense 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 professional liability defense law firms.
- Partial evidence
- Its own public description names part of professional liability defense law firms, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name professional liability defense 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 3,041 professional liability defense law firms based in the United States
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Professional liability defense law firms based in the United States at a glance
As of Sep 29, 2026Companies by employee count
Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 3,041 companies.
How 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 professional liability defense 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 the United States whose own description of what they do matches “professional liability defense 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 professional liability defense 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 professional liability defense law firms, and records with no verified work email. Companies headquartered outside United States 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, 35,447 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 29, 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.
Professional liability defense law firms by metro
- Professional liability defense law firms in New York140
- Professional liability defense law firms in Chicago127
- Professional liability defense law firms in Houston81
- Professional liability defense law firms in Dallas79
- Professional liability defense law firms in Los Angeles78
- Professional liability defense law firms in Atlanta58
- Professional liability defense law firms in Tampa54
- Professional liability defense law firms in Miami48
- Professional liability defense law firms in San Diego46
- Professional liability defense law firms in Philadelphia45
- Professional liability defense law firms in Boston41
- Professional liability defense law firms in Birmingham35
- Professional liability defense law firms in San Francisco35
- Professional liability defense law firms in New Orleans33
- Professional liability defense law firms in Denver31
- Professional liability defense law firms in Austin30
- Professional liability defense law firms in Minneapolis30
- Professional liability defense law firms in Phoenix30
- Professional liability defense law firms in Orlando28
- Professional liability defense law firms in Fort Lauderdale27
- Professional liability defense law firms in Seattle25
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 professional liability defense 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 professional liability defense law firms are there based in the United States?
RevenueBase identified 3,041 professional liability defense law firms headquartered in the 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?
Wilson Elser, headquartered in New York, tops this list with the largest team on record.
Which city has the most professional liability defense law firms?
New York leads with 140 headquartered companies, followed by Chicago (127) and Houston (81).
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 35,447 verified decision-maker contacts tracked across these 3,041 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 29, 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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