Company lists · Data refreshed September 2026

Top 25 Regulatory compliance law firms based in the United States

Name: Regulatory compliance law firms based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 5, 2026 1,639 companies tracked

RevenueBase identified 1,639 regulatory compliance law firms headquartered in the United States as of September 2026 and tracks 33,391 professional contacts across them, including 19,001 with verified work emails and 17,329 with mobile numbers. New York is the largest hub.

This list covers regulatory compliance 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 5, 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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 5, 2026 86% judged on-target in blind review

1,639Companies

33,391Contacts tracked

19,001Verified emails

17,329Mobile numbers

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The 25 largest regulatory compliance law firms based in the United States

Ranked by team size

Top 25 of 1,639 regulatory compliance law firms based in the United States, ranked by team size, largest first. Data refreshed Sep 5, 2026. RevenueBase Smart Search rates how each company's information relates to regulatory compliance law firms: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Arnold & Porter	Partial evidence	Washington, DC, United StatesHQ checked Sep 5, 2026	1,001-5,000	2,333 contacts →
	Partial evidence “Arnold & Porter combines sophisticated regulatory, litigation, and transactional capabilities to resolve clients’ most complex issues.” Source: RevenueBase Database · checked Sep 5, 2026
2	Dechert LLP	Partial evidence	Philadelphia, PA, United StatesHQ checked Sep 5, 2026	1,001-5,000	2,041 contacts →
	Partial evidence “Dechert is the law firm that helps business leaders lead.” Source: RevenueBase Database · checked Sep 5, 2026
3	Nelson Mullins Riley & Scarborough	Partial evidence	Columbia, SC, United StatesHQ checked Sep 5, 2026	1,001-5,000	2,012 contacts →
	Partial 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 5, 2026
4	Venable LLP	Strong evidence	Washington, DC, United StatesHQ checked Sep 5, 2026	1,001-5,000	1,790 contacts →
	Strong evidence “Committed to Your Success – As a law firm of more than 900 professionals, Venable delivers legal services globally in every area of regulatory compliance, government affairs…” Source: RevenueBase Database · checked Sep 5, 2026
5	Ballard Spahr LLP	Partial evidence	Philadelphia, PA, United StatesHQ checked Sep 5, 2026	1,001-5,000	1,682 contacts →
	Partial evidence “Ballard Spahr LLP, an Am Law 100 law firm with more than 750 lawyers in 19 U.S.” Source: RevenueBase Database · checked Sep 5, 2026
6	Clark Hill LAW	Indirect evidence	Detroit, MI, United StatesHQ checked Sep 5, 2026	1,001-5,000	1,343 contacts →
	Indirect evidence “At Clark Hill, our value proposition is simple.” Source: RevenueBase Database · checked Sep 5, 2026
7	Buchanan Ingersoll & Rooney PC	Strong evidence	Pittsburgh, PA, United StatesHQ checked Sep 5, 2026	501-1,000	1,197 contacts →
	Strong evidence “Buchanan Ingersoll & Rooney is a national law firm with a proven reputation for providing progressive, industry-leading legal, business, regulatory and government relations advice…” Source: RevenueBase Database · checked Sep 5, 2026
8	Hinshaw & Culbertson LLP	Partial evidence	Chicago, IL, United StatesHQ checked Sep 5, 2026	501-1,000	1,188 contacts →
	Partial evidence “Hinshaw & Culbertson LLP is a U.S-based law firm with offices nationwide.” Source: RevenueBase Database · checked Sep 5, 2026
9	Brownstein Hyatt Farber Schreck	Partial evidence	Denver, CO, United StatesHQ checked Sep 5, 2026	501-1,000	902 contacts →
	Partial evidence “For decades, we’ve positioned ourselves at the intersection of law, business and policy to bring a multidisciplinary strategy to every issue.” Source: RevenueBase Database · checked Sep 5, 2026
10	Hall Booth Smith, P.C	Partial evidence	Atlanta, GA, United StatesHQ checked Sep 5, 2026	501-1,000	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 5, 2026
11	CT Corporation	Strong evidence	New York, NY, United StatesHQ checked Sep 5, 2026	1,001-5,000	788 contacts →
	Strong evidence “CT Corporation helps small businesses, corporations, and law firms around the world manage their most critical business and legal compliance responsibilities.” Source: RevenueBase Database · checked Sep 5, 2026
12	Fordharrison LLP	Partial evidence	Atlanta, GA, United StatesHQ checked Sep 5, 2026	201-500	746 contacts →
	Partial evidence “FordHarrison LLP - your partner in employment law.” Source: RevenueBase Database · checked Sep 5, 2026
13	Kelley Drye & Warren LLP	Partial evidence	New York, NY, United StatesHQ checked Sep 5, 2026	501-1,000	690 contacts →
	Partial evidence “Kelley Drye is an AmLaw 200 law firm of more than 350 lawyers and other professionals practicing in New York, NY; Washington, D.C; Chicago, IL; Houston, TX, Los Angeles, CA; San…” Source: RevenueBase Database · checked Sep 5, 2026
14	Parker POE Adams & Bernstein LLP	Indirect evidence	Charlotte, NC, United StatesHQ checked Sep 5, 2026	501-1,000	584 contacts →
	Indirect evidence “Businesses and local governments turn to Parker Poe to structure transactions, navigate regulations, and resolve disputes.” Source: RevenueBase Database · checked Sep 5, 2026
15	Wiley Rein LLP	Indirect evidence	Washington, DC, United StatesHQ checked Sep 5, 2026	501-1,000	576 contacts →
	Indirect evidence “Founded in 1983, Wiley is a dominant presence in the nation’s capital.” Source: RevenueBase Database · checked Sep 5, 2026
16	Stites & Harbison, Pllc	Partial evidence	Louisville, KY, United StatesHQ checked Sep 5, 2026	201-500	426 contacts →
	Partial evidence “A full-service law firm representing clients across the United States and internationally, Stites & Harbison, PLLC is known as a preeminent firm managing sophisticated…” Source: RevenueBase Database · checked Sep 5, 2026
17	Post & Schell, P.C	Indirect evidence	Philadelphia, PA, United StatesHQ checked Sep 5, 2026	201-500	336 contacts →
	Indirect evidence “For over 50 years, Post & Schell’s attorneys have combined the operational knowledge and insight into the industries they represent with creative legal solutions – and helped…” Source: RevenueBase Database · checked Sep 5, 2026
18	Comply	Partial evidence	New York City, NY, United StatesHQ checked Sep 5, 2026	201-500	308 contacts →
	Partial evidence “At Comply, we pride ourselves on being the champion for compliance professionals.” Source: RevenueBase Database · checked Sep 5, 2026
19	Mcnees Wallace & Nurick	Partial evidence	Harrisburg, PA, United StatesHQ checked Sep 5, 2026	201-500	307 contacts →
	Partial evidence “Since 1935, McNees Wallace & Nurick has been a trusted, client-focused law firm delivering practical, results-driven legal solutions to businesses, individuals, and organizations.” Source: RevenueBase Database · checked Sep 5, 2026
20	Keller And Heckman LLP	Strong evidence	Washington, DC, United StatesHQ checked Sep 5, 2026	51-200	230 contacts →
	Strong evidence “Keller and Heckman, founded in 1962, has a broad practice in the areas of regulatory law, public policy, and litigation, serving both domestic and international clients.” Source: RevenueBase Database · checked Sep 5, 2026
21	Mullen Coughlin LLC	Indirect evidence	Devon, PA, United StatesHQ checked Sep 5, 2026	201-500	213 contacts →
	Indirect evidence “Founded by John F.” Source: RevenueBase Database · checked Sep 5, 2026
22	Babst Calland	Indirect evidence	Pittsburgh, PA, United StatesHQ checked Sep 5, 2026	51-200	192 contacts →
	Indirect evidence “As a collaborative and integrated group of attorneys, we work as a unified team, not as sole practitioners.” Source: RevenueBase Database · checked Sep 5, 2026
23	Complyright, INC	Partial evidence	Pompano Beach, FL, United StatesHQ checked Sep 5, 2026	201-500	190 contacts →
	Partial evidence “At ComplyRight®, our mission is to empower employers by simplifying the complex world of employment law.” Source: RevenueBase Database · checked Sep 5, 2026
24	Smith Currie Oles LLP	Indirect evidence	Atlanta, GA, United StatesHQ checked Sep 5, 2026	51-200	184 contacts →
	Indirect evidence “Smith Currie Oles (SCO) provides comprehensive legal services to all parts of the construction industry.” Source: RevenueBase Database · checked Sep 5, 2026
25	Harbor Compliance	Partial evidence	Lancaster, PA, United StatesHQ checked Sep 5, 2026	201-500	150 contacts →
	Partial evidence “We provide innovative compliance solutions by embracing complexity and making it simple.” Source: RevenueBase Database · checked Sep 5, 2026

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: regulatory compliance 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 regulatory compliance law firms.
Partial evidence: Its own public description names part of regulatory compliance law firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name regulatory compliance 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 1,639 regulatory compliance law firms based in the United States

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Regulatory compliance law firms based in the United States at a glance

As of Sep 5, 2026

56.9%Verified-email coverage

51.9%Mobile-number coverage

20.4Average contacts per company

1-10Median size (employees)

6.6%Largest-city concentration · New York

Sep 5, 2026Page data refreshed

Companies by employee count

1-10

1,146

11-50

381

51-200

201-500

501-1,000

1,001-5,000

Freshness & accuracy

How recently the business emails on this list were verified

Email last verified

17,7600–30

1,14131–60

861–90

690–180

86180+

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 regulatory compliance 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 “regulatory compliance 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 regulatory compliance 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 regulatory compliance 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, 19,001 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 5, 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.

Regulatory compliance law firms by metro

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 regulatory compliance 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 regulatory compliance law firms are there based in the United States?

RevenueBase identified 1,639 regulatory compliance 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?

Arnold & Porter, headquartered in Washington, tops this list with the largest team on record.

Which city has the most regulatory compliance law firms?

New York leads with 108 headquartered companies, followed by Washington (106) and Miami (40).

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 19,001 verified decision-maker contacts tracked across these 1,639 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 5, 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.