Company lists · Data refreshed September 2026
Top 25 Regulatory law firms based in Houston, United States
RevenueBase identified 178 regulatory law firms headquartered in Houston, United States as of September 2026 and tracks 5,408 professional contacts across them, including 2,865 with verified work emails. Across the United States, New York is the largest hub for this category (423 companies); Houston has 178.
This list covers regulatory law firms headquartered in Houston, 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 regulatory law firms based in Houston, United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 1,693 contacts → | ||||
Partial evidence “Vinson & Elkins is a law firm of global distinction, working with leading companies on wide-ranging matters in key industries across the economy.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 2 | 933 contacts → | ||||
Partial evidence “Bracewell LLP is a leading law and government relations firm.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 3 | 314 contacts → | ||||
Partial evidence “As a full-service Texas law firm with a comprehensive range of litigation and transactional practice groups, Gray Reed's 150 attorneys focus on understanding our clients'…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 4 | 222 contacts → | ||||
Partial evidence “Porter Hedges is recognized as one of the premier business law firms based in Houston.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 5 | 208 contacts → | ||||
Partial evidence “For over 25 years, Johnson Law Group has been committed to delivering exceptional legal services with integrity, professionalism, and a client-focused approach.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 6 | 182 contacts → | ||||
Partial evidence “Founded in 1990 by Mark Lanier, The Lanier Law Firm is committed to addressing client concerns with effective and often untraditional solutions.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 7 | 144 contacts → | ||||
Indirect evidence “About Brown Sims - For over 50 years, Brown Sims has dedicated itself to providing its clients with experienced-based solutions tailored to their specific legal problems.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 8 | 90 contacts → | ||||
Indirect evidence “For over 50 years, Houston, Texas based HooverSlovacek LLP has been helping clients with dynamic, cost efficient, result driven representation.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 9 | 86 contacts → | ||||
Indirect evidence “Pappas Grubbs Price is a Texas-based civil litigation defense firm.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 10 | 85 contacts → | ||||
Partial evidence “Kuiper Law Firm has established itself as a trusted legal partner for businesses across diverse industries.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 11 | 82 contacts → | ||||
Indirect evidence “Yetter Coleman is based in Houston, Texas.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 12 | 82 contacts → | ||||
Indirect evidence “Roberts Markel Weinberg Butler Hailey PC has provided the experience and service our clients require for their transactional and litigation needs for more than 35 years.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 13 | 65 contacts → | ||||
Partial evidence “Founded in 2009, Thompson & Horton LLP is a full-service law firm dedicated to providing the highest quality, personalized legal representation to schools, institutions of higher…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 14 | 63 contacts → | ||||
Indirect evidence “As a leader in the environmental compliance services industry, AARC does more than just meeting the needs of clients today.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 15 | 63 contacts → | ||||
Partial evidence “RCP is the regulatory compliance and risk management expert for pipelines, facilities, and terminal operations.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 16 | 52 contacts → | ||||
Indirect evidence “Since the firm’s inception in 1896 and from its offices in Houston, Texas, Crady Jewett McCulley & Houren LLP has provided comprehensive legal counsel to businesses and…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 17 | 42 contacts → | ||||
Partial evidence “Daniels & Tredennick handles complex legal matters across both litigation and corporate law.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 18 | 42 contacts → | ||||
Partial evidence “HANSZEN LAPORTE IS A HOUSTON-BASED, AV “PREEMINENT” RATED LAW FIRM COMPRISED OF THREE PRACTICE GROUPS, LITIGATION, BUSINESS AND REAL ESTATE.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 19 | 36 contacts → | ||||
Partial evidence “Novak Druce Connolly Bove + Quigg LLP is a nationally recognized law firm focused on complex intellectual property matters.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 20 | 32 contacts → | ||||
Indirect evidence “Beirut | Dubai | Houston | Al Khobar | Bahrain | Riyadh Empowering Businesses Worldwide Established in 2012, KN Legal has spent over a decade providing clients with superior legal…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 21 | 30 contacts → | ||||
Indirect evidence “We are a team of trial lawyers that represent the common person.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 22 | 21 contacts → | ||||
Indirect evidence “Eggleston & Briscoe serves a predominantly corporate and institutional client base representing a variety of publicly and privately owned business interests.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 23 | 19 contacts → | ||||
Partial evidence “The Carter Law Firm represents businesses and individuals for their legal needs in the business and corporate sectors.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 24 | 18 contacts → | ||||
Indirect evidence “At Sprott Newsom Quattlebaum Messenger, we represent individuals, business entities, business owners, and health care providers in a broad range of litigation and other legal…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 25 | 17 contacts → | ||||
Indirect evidence “C.” 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: regulatory 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 law firms.
- Partial evidence
- Its own public description names part of regulatory 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 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 178 regulatory law firms based in Houston, United States
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Regulatory law firms based in Houston, United States at a glance
As of Sep 29, 2026Companies by employee count
Email recency for this list is measured across the whole United States list rather than for Houston, so it is reported there. Company counts and contact totals on this page are exact for Houston, over 178 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 regulatory 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 Houston, United States whose own description of what they do matches “regulatory 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 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 law firms, and records with no verified work email. Companies headquartered outside Houston 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, 2,865 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.
Regulatory law firms by metro in the United States
- Regulatory law firms in New York423
- Regulatory law firms in Washington302
- Regulatory law firms in Chicago230
- Regulatory law firms in Los Angeles174
- Regulatory law firms in Atlanta164
- Regulatory law firms in Dallas160
- Regulatory law firms in Boston122
- Regulatory law firms in Miami116
- Regulatory law firms in San Diego106
- Regulatory law firms in San Francisco104
- Regulatory law firms in Austin103
- Regulatory law firms in Philadelphia96
- Regulatory law firms in Denver89
- Regulatory law firms in Portland72
- Regulatory law firms in Tampa67
- Regulatory law firms in New Orleans65
- Regulatory law firms in Phoenix65
- Regulatory law firms in Birmingham61
- Regulatory law firms in Seattle61
- Regulatory law firms in Minneapolis59
- Regulatory law firms in Irvine56
- Regulatory law firms in Sacramento48
- Regulatory law firms in Columbus45
- Regulatory law firms in Indianapolis45
- Regulatory law firms in Fort Lauderdale43
- Regulatory law firms in Pittsburgh42
- Regulatory law firms in Coral Gables40
- Regulatory law firms in Raleigh40
- Regulatory law firms in Salt Lake City39
- Regulatory law firms in Cleveland38
- Regulatory law firms in Richmond38
- Regulatory law firms in Baltimore36
- Regulatory law firms in Las Vegas36
- Regulatory law firms in Nashville36
- Regulatory law firms in Oklahoma City36
- Regulatory law firms in Columbia35
- Regulatory law firms in Kansas City34
- Regulatory law firms in San Antonio34
- Regulatory law firms in Milwaukee33
- Regulatory law firms in Charlotte32
- Regulatory law firms in Jacksonville32
- Regulatory law firms in Boca Raton29
- Regulatory law firms in Tulsa29
- Regulatory law firms in Detroit28
- Regulatory law firms in Tallahassee28
- Regulatory law firms in Buffalo27
- Regulatory law firms in Annapolis25
- Regulatory law firms in Pasadena25
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 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 law firms are there based in Houston, United States?
RevenueBase identified 178 regulatory law firms headquartered in Houston, 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?
Vinson & Elkins, headquartered in Houston, tops this list with the largest team on record.
Which city in the United States has the most regulatory law firms?
New York leads the United States with 423 headquartered companies, followed by Washington (302) and Chicago (230). Houston has 178.
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 2,865 verified decision-maker contacts tracked across these 178 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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