Company lists · Data refreshed September 2026

Top 25 Energy regulatory law firms worldwide

Name: Energy regulatory law firms worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 2,010 companies tracked

RevenueBase identified 2,010 energy regulatory law firms worldwide as of September 2026 and tracks 22,336 professional contacts across them, including 10,048 with verified work emails. The United States is the largest market and Sao Paulo the largest hub.

This list covers energy regulatory law firms worldwide, 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 28, 2026. Country and city lists for energy regulatory law firms follow the table.

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 28, 2026 86% judged on-target in blind review

2,010Companies

22,336Contacts tracked

10,048Verified emails

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The 25 largest energy regulatory law firms worldwide

Ranked by team size

Top 25 of 2,010 energy regulatory law firms worldwide, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to energy regulatory 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	Buchanan Ingersoll & Rooney PC	Strong evidence	Pittsburgh, PA, United StatesHQ checked Sep 28, 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 28, 2026
2	Shakespeare Martineau	Partial evidence	Birmingham, United KingdomHQ checked Sep 28, 2026	1,001-5,000	989 contacts →
	Partial evidence “Shakespeare Martineau is a leading law firm that brings creativity, commerciality and clarity to complex challenges.” Source: RevenueBase Database · checked Sep 28, 2026
3	Stoel Rives LLP	Indirect evidence	Portland, OR, United StatesHQ checked Sep 28, 2026	501-1,000	864 contacts →
	Indirect evidence “Stoel Rives is a leading U.S.” Source: RevenueBase Database · checked Sep 28, 2026
4	Steptoe & Johnson Pllc	Strong evidence	Bridgeport, WV, United StatesHQ checked Sep 28, 2026	501-1,000	757 contacts →
	Strong evidence “Steptoe & Johnson PLLC is a law firm nationally recognized for its strengths in energy law with more than a century of know-how in the areas of business, employment, and…” Source: RevenueBase Database · checked Sep 28, 2026
5	Wiley Rein LLP	Indirect evidence	Washington, DC, United StatesHQ checked Sep 28, 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 28, 2026
6	Kean Miller	Indirect evidence	Baton Rouge, LA, United StatesHQ checked Sep 28, 2026	201-500	452 contacts →
	Indirect evidence “Just as oil and gas must be refined to unlock their true potential, we at Kean Miller continuously optimize our legal approach to help transform business complexities into new…” Source: RevenueBase Database · checked Sep 28, 2026
7	Thompson & Knight LLP	Indirect evidence	Dallas, TX, United StatesHQ checked Sep 28, 2026	501-1,000	327 contacts →
	Indirect evidence “Thompson & Knight is now known as Holland & Knight.” Source: RevenueBase Database · checked Sep 28, 2026
8	Pierce Atwood LLP	Partial evidence	Portland, ME, United StatesHQ checked Sep 28, 2026	201-500	320 contacts →
	Partial evidence “Pierce Atwood LLP, a highly-regarded, full-service law firm based in New England, has 150 attorneys who serve regional, national, and international clients from offices in…” Source: RevenueBase Database · checked Sep 28, 2026
9	Davis Graham & Stubbs LLP	Strong evidence	Denver, CO, United StatesHQ checked Sep 28, 2026	201-500	283 contacts →
	Strong evidence “Davis Graham & Stubbs LLP enjoys a strong national reputation for its corporate finance, natural resources, and energy law practices, with a particular focus on securities and M&A…” Source: RevenueBase Database · checked Sep 28, 2026
10	Enzen Global Solutions	Partial evidence	Bengaluru, IndiaHQ checked Sep 28, 2026	1,001-5,000	277 contacts →
	Partial evidence “Enzen Global Solutions - India is part of the Enzen Group, a global, professional, knowledge practice that focuses on gaining, refining and sharing expertise in the energy and…” Source: RevenueBase Database · checked Sep 28, 2026
11	Schouest, Bamdas, Soshea & Benmaier Pllc	Partial evidence	Houston, TX, United StatesHQ checked Sep 28, 2026	201-500	271 contacts →
	Partial evidence “Schouest, Bamdas, Soshea & BenMaier PLLC is a law firm focused on your needs.” Source: RevenueBase Database · checked Sep 28, 2026
12	Liskow	Indirect evidence	New Orleans, LA, United StatesHQ checked Sep 28, 2026	201-500	259 contacts →
	Indirect evidence “Liskow was founded in 1935 and includes nearly 150 lawyers across our five offices, strategically located in New Orleans, Lafayette, and Baton Rouge, Louisiana, Houston, Texas…” Source: RevenueBase Database · checked Sep 28, 2026
13	Galicia Mexico	Partial evidence	México, MexicoHQ checked Sep 28, 2026	201-500	239 contacts →
	Partial evidence “GALICIA was founded in 1994 and has since become Mexico´s leading transactional firm with strong regulatory offering supported by its strategic litigation capabilities.” Source: RevenueBase Database · checked Sep 28, 2026
14	Keller And Heckman LLP	Strong evidence	Washington, DC, United StatesHQ checked Sep 28, 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 28, 2026
15	Mercados Energy Markets India	Partial evidence	New Delhi, IndiaHQ checked Sep 28, 2026	51-200	178 contacts →
	Partial evidence “Mercados Energy Markets India Private Limited (Mercados EMI) is a global consulting firm specializing in power and energy.” Source: RevenueBase Database · checked Sep 28, 2026
16	VAN Ness Feldman LLP	Strong evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	51-200	174 contacts →
	Strong evidence “Van Ness Feldman is a nationally recognized mid-sized law firm specializing in the areas of energy, environment, and natural resources law and policy, with offices in Washington…” Source: RevenueBase Database · checked Sep 28, 2026
17	Mcginnis Lochridge	Indirect evidence	Austin, TX, United StatesHQ checked Sep 28, 2026	51-200	160 contacts →
	Indirect evidence “For almost 100 years, McGinnis Lochridge has served to protect the interests of our clients in continuously changing landscapes including cutting-edge technology, oil and gas…” Source: RevenueBase Database · checked Sep 28, 2026
18	AELEX	Partial evidence	Ikoyi, NigeriaHQ checked Sep 28, 2026	51-200	160 contacts →
	Partial evidence “ǼLEX is a full service commercial & dispute resolution law firm.” Source: RevenueBase Database · checked Sep 28, 2026
19	Advokatfirmaet Hjort	Partial evidence	Oslo, NorwayHQ checked Sep 28, 2026	51-200	132 contacts →
	Partial evidence “We assist our clients with advice and procedural assignments in all key areas of law.” Source: RevenueBase Database · checked Sep 28, 2026
20	Murtha Cullina LLP	Indirect evidence	Hartford, CT, United StatesHQ checked Sep 28, 2026	51-200	127 contacts →
	Indirect evidence “On January 1, 2025, Murtha Cullina LLP and Harris Beach PLLC combined to become Harris Beach Murtha.” Source: RevenueBase Database · checked Sep 28, 2026
21	Adaltys Avocats	Indirect evidence	Lyon, FranceHQ checked Sep 28, 2026	51-200	123 contacts →
	Indirect evidence “Since our creation, we have been active in both the public and private sectors and have maintained this dual culture.” Source: RevenueBase Database · checked Sep 28, 2026
22	Mudrovitsch Advogados	Indirect evidence	Brasília, BrazilHQ checked Sep 28, 2026	51-200	123 contacts →
	Indirect evidence “O Mudrovitsch Advogados está entre os principais escritórios de advocacia do Brasil, com expertise em áreas que vão desde o Direito Constitucional e Criminal, Direito…” Source: RevenueBase Database · checked Sep 28, 2026
23	Scott Douglass & Mcconnico LLP	Indirect evidence	Austin, TX, United StatesHQ checked Sep 28, 2026	51-200	117 contacts →
	Indirect evidence “Our Services: Scott Douglass & McConnico is a firm of seasoned trial lawyers who regularly handle trials, hearings and appeals.” Source: RevenueBase Database · checked Sep 28, 2026
24	Dehaan Advocaten EN Notarissen	Indirect evidence	Groningen, NetherlandsHQ checked Sep 28, 2026	51-200	114 contacts →
	Indirect evidence “Zeker zakendoen met De Haan Advocaten & Notarissen Met 80 specialisten en 40 jaar ervaring is De Haan dé full-service juridische dienstverlener voor zakelijk Nederland.” Source: RevenueBase Database · checked Sep 28, 2026
25	Marins Bertoldi Advogados	Indirect evidence	Curitiba, BrazilHQ checked Sep 28, 2026	51-200	110 contacts →
	Indirect evidence “MARINS BERTOLDI ADVOGADOS ASSOCIADOS dedica-se à prestação de serviços jurídicos nas diversas áreas do direito empresarial, tendo como principal característica a capacidade de…” Source: RevenueBase Database · checked Sep 28, 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: energy 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 energy regulatory law firms.
Partial evidence: Its own public description names part of energy 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 energy 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 2,010 energy regulatory law firms worldwide

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Energy regulatory law firms worldwide at a glance

As of Sep 28, 2026

45.0%Verified-email coverage

11.1Average contacts per company

1-10Median size (employees)

2.0%Largest-city concentration · Sao Paulo

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

1,312

11-50

583

51-200

201-500

501-1,000

1,001-5,000

Email recency is reported on each country list linked below.

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 energy 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.
Coverage: Every country. Country and city lists for energy regulatory law firms are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “energy 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 energy 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 energy regulatory law firms, and records with no verified work email.
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, 10,048 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 28, 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.

Energy regulatory law firms by location

18 lists · largest first

Every Energy regulatory law firms list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

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 energy 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 energy regulatory law firms are there worldwide?

RevenueBase identified 2,010 energy regulatory law firms worldwide 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?

Buchanan Ingersoll & Rooney PC, headquartered in Pittsburgh, tops this list with the largest team on record.

Which country has the most energy regulatory law firms?

The United States leads with 395 companies, followed by Brazil (167) and Spain (101). Every energy regulatory law firms list by country and city is linked on this page.

Which city has the most energy regulatory law firms?

Sao Paulo leads with 40 headquartered companies, followed by Paris (36) and Washington (35).

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 10,048 verified decision-maker contacts tracked across these 2,010 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 28, 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.