Company lists · Data refreshed September 2026

Top 25 Energy sector law firms worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 11,917 companies tracked

RevenueBase identified 11,917 energy sector law firms worldwide as of September 2026 and tracks 258,479 professional contacts across them, including 122,872 with verified work emails. The United States is the largest market and Sao Paulo the largest hub.

This list covers energy sector 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 21, 2026. Country and city lists for energy sector 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 21, 2026 86% judged on-target in blind review

11,917Companies

258,479Contacts tracked

122,872Verified emails

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The 25 largest energy sector law firms worldwide

Ranked by team size

Top 25 of 11,917 energy sector law firms worldwide, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to energy sector 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	A&o Shearman	Partial evidence	Hamburg, United KingdomHQ checked Sep 21, 2026	5,001-10,000	6,574 contacts →
	Partial evidence “A&O Shearman transforms the way law is practiced, to deliver unparalleled results for our clients' most complex matters – everywhere in the world.” Source: RevenueBase Database · checked Sep 21, 2026
2	Foley & Lardner LLP	Strong evidence	Milwaukee, WI, United StatesHQ checked Sep 21, 2026	1,001-5,000	2,884 contacts →
	Strong evidence “Foley & Lardner LLP stands at the nexus of the Energy & Infrastructure, Health Care & Life Sciences, Innovative Technology, and Manufacturing Sectors.” Source: RevenueBase Database · checked Sep 21, 2026
3	Perkins Coie	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 21, 2026	1,001-5,000	2,746 contacts →
	Indirect evidence “Perkins Coie has combined with Ashurst to form Ashurst Perkins Coie.” Source: RevenueBase Database · checked Sep 21, 2026
4	Simmons & Simmons	Partial evidence	London, United KingdomHQ checked Sep 21, 2026	1,001-5,000	2,498 contacts →
	Partial evidence “An international law firm that acts like your business partner.” Source: RevenueBase Database · checked Sep 21, 2026
5	Arnold & Porter	Indirect evidence	Washington, DC, United StatesHQ checked Sep 21, 2026	1,001-5,000	2,333 contacts →
	Indirect evidence “Arnold & Porter combines sophisticated regulatory, litigation, and transactional capabilities to resolve clients’ most complex issues.” Source: RevenueBase Database · checked Sep 21, 2026
6	Dechert LLP	Partial evidence	Philadelphia, PA, United StatesHQ checked Sep 21, 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 21, 2026
7	Slaughter And MAY	Partial evidence	London, United KingdomHQ checked Sep 21, 2026	1,001-5,000	1,951 contacts →
	Partial evidence “Slaughter and May is regarded as one of the most prestigious law firms in the world.” Source: RevenueBase Database · checked Sep 21, 2026
8	Fieldfisher	Partial evidence	London, United KingdomHQ checked Sep 21, 2026	1,001-5,000	1,940 contacts →
	Partial evidence “Fieldfisher is an enterprising European law firm built around people.” Source: RevenueBase Database · checked Sep 21, 2026
9	Trilegal	Partial evidence	Mumbai, IndiaHQ checked Sep 21, 2026	1,001-5,000	1,926 contacts →
	Partial evidence “Trilegal is a leading full-service law firm in India with over 25 years of experience, known for its depth of expertise and client-focused approach.” Source: RevenueBase Database · checked Sep 21, 2026
10	Troutman Pepper Locke LLP	Indirect evidence	United StatesHQ checked Sep 21, 2026	1,001-5,000	1,895 contacts →
	Indirect evidence “Troutman Pepper Locke LLP helps clients solve complex legal challenges and achieve their business goals in an ever-changing global economy.” Source: RevenueBase Database · checked Sep 21, 2026
11	Faegre Drinker	Indirect evidence	Philadelphia, PA, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,848 contacts →
	Indirect evidence “Faegre Drinker is a firm designed for clients.” Source: RevenueBase Database · checked Sep 21, 2026
12	TLT LLP	Indirect evidence	Bristol, United KingdomHQ checked Sep 21, 2026	1,001-5,000	1,797 contacts →
	Indirect evidence “We’re your business advisers as well as your lawyers, working in step with you to protect your interests today and progress your ambitions for tomorrow.” Source: RevenueBase Database · checked Sep 21, 2026
13	Venable LLP	Partial evidence	Washington, DC, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,790 contacts →
	Partial 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 21, 2026
14	Clayton UTZ	Strong evidence	Sydney, AustraliaHQ checked Sep 21, 2026	1,001-5,000	1,787 contacts →
	Strong evidence “We are one of Australia's oldest and largest law firms, with offices in six cities, nearly 200 partners, and a full range of legal services for large private sector and government…” Source: RevenueBase Database · checked Sep 21, 2026
15	Cyril Amarchand Mangaldas	Partial evidence	Mumbai, IndiaHQ checked Sep 21, 2026	1,001-5,000	1,756 contacts →
	Partial evidence “Cyril Amarchand Mangaldas (CAM) is India’s leading law firm with a global reputation of being trusted advisers to its clients.” Source: RevenueBase Database · checked Sep 21, 2026
16	Vinson & Elkins	Partial evidence	Houston, TX, United StatesHQ checked Sep 21, 2026	1,001-5,000	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 21, 2026
17	Ballard Spahr LLP	Partial evidence	Philadelphia, PA, United StatesHQ checked Sep 21, 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 21, 2026
18	Crowell & Moring	Partial evidence	Washington, DC, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,602 contacts →
	Partial evidence “Crowell & Moring is an international law firm with operations in the United States, Europe, MENA, and Asia.” Source: RevenueBase Database · checked Sep 21, 2026
19	Tozzinifreire Advogados	Partial evidence	São Paulo, BrazilHQ checked Sep 21, 2026	1,001-5,000	1,580 contacts →
	Partial evidence “TozziniFreire is one of the leading legal services organizations in Latin America, operating in all areas of Business Law and with a significant track record in serving national…” Source: RevenueBase Database · checked Sep 21, 2026
20	Haynes And Boone, LLP	Strong evidence	Dallas, TX, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,558 contacts →
	Strong evidence “Haynes Boone is among the fastest-growing firms in the Am Law 100, providing full-service counsel across sectors, including corporate, energy, financial services, real estate…” Source: RevenueBase Database · checked Sep 21, 2026
21	Blake, Cassels & Graydon LLP	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 21, 2026	1,001-5,000	1,555 contacts →
	Indirect evidence “At Blake, Cassels & Graydon LLP (Blakes), we serve a diverse national and international client base.” Source: RevenueBase Database · checked Sep 21, 2026
22	Mattos Filho	Indirect evidence	São Paulo, BrazilHQ checked Sep 21, 2026	1,001-5,000	1,553 contacts →
	Indirect evidence “Somos um dos escritórios de advocacia líderes do mercado brasileiro, estruturado para atender nossos clientes em mais de 45 áreas do Direito, de maneira coordenada e integrada.” Source: RevenueBase Database · checked Sep 21, 2026
23	Corrs Chambers Westgarth	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	1,001-5,000	1,506 contacts →
	Partial evidence “Corrs Chambers Westgarth is Australia’s leading independent law firm.” Source: RevenueBase Database · checked Sep 21, 2026
24	Baker Botts	Partial evidence	Houston, TX, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,477 contacts →
	Partial evidence “Baker Botts is an international law firm whose lawyers practice throughout a network of offices around the globe.” Source: RevenueBase Database · checked Sep 21, 2026
25	Stephenson Harwood LLP	Partial evidence	London, United KingdomHQ checked Sep 21, 2026	1,001-5,000	1,474 contacts →
	Partial evidence “Stephenson Harwood is an international law firm, and we're committed to creating 'positive partnerships' with our clients.” Source: RevenueBase Database · checked Sep 21, 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 sector 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 sector law firms.
Partial evidence: Its own public description names part of energy sector 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 sector 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 11,917 energy sector law firms worldwide

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Energy sector law firms worldwide at a glance

As of Sep 21, 2026

47.5%Verified-email coverage

21.7Average contacts per company

1-10Median size (employees)

3.1%Largest-city concentration · Sao Paulo

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

6,867

11-50

3,899

51-200

805

201-500

179

501-1,000

1,001-5,000

5,001-10,000

10001+

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 sector 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 sector law firms are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “energy sector 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 sector 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 sector 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, 122,872 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 21, 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 sector law firms by location

72 lists · largest first

Every Energy sector 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 sector 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 sector law firms are there worldwide?

RevenueBase identified 11,917 energy sector 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?

A&o Shearman, headquartered in Hamburg, tops this list with the largest team on record.

Which country has the most energy sector law firms?

The United States leads with 1,842 companies, followed by Brazil (1,616) and France (565). Every energy sector law firms list by country and city is linked on this page.

Which city has the most energy sector law firms?

Sao Paulo leads with 368 headquartered companies, followed by Paris (282) and Rio De Janeiro (141).

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 122,872 verified decision-maker contacts tracked across these 11,917 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 21, 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.