Company lists · Data refreshed September 2026

Top 25 Energy tax law firms worldwide

RevenueBase identified 6,058 company matches for energy tax law firms worldwide as of September 2026 and tracks 72,871 professional contacts across them, including 28,797 with verified work emails. Brazil is the largest market and Sao Paulo the largest hub.

This list covers company matches for energy tax law firms worldwide, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 28, 2026. Country and city lists for energy tax law firms follow the table.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Sep 28, 2026 How this list was built
6,058Companies
72,871Contacts tracked
28,797Verified emails
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The 25 largest energy tax law firms worldwide

Ranked by team size
Top 25 of 6,058 company matches for energy tax law firms worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 28, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchHamburg, United KingdomHQ recorded Sep 28, 20265,001-10,0006,574 contacts →

Exact match

“A&O Shearman transforms the way law is practiced, to deliver unparalleled results for our clients' most complex matters – everywhere in the world.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
2Exact matchMadrid, SpainHQ recorded Sep 28, 20261,001-5,0002,853 contacts →

Exact match

“Garrigues is an international legal and tax services firm that advises clients locally, regionally and globally from every angle of business law.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
3Exact matchDallas, TX, United StatesHQ recorded Sep 28, 20261,001-5,0001,558 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
4Exact matchLondon, United KingdomHQ recorded Sep 28, 20261,001-5,0001,331 contacts →

Exact match

“Watson Farley & Williams is a leading international law firm advising clients operating in the energy, infrastructure and transport sectors.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
5Exact matchPittsburgh, PA, United StatesHQ recorded Sep 28, 2026501-1,0001,197 contacts →

Exact match

“Buchanan Ingersoll & Rooney is a national law firm with a proven reputation for providing progressive, industry-leading legal, business, regulatory and government relations advice…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
6Exact matchBirmingham, United KingdomHQ recorded Sep 28, 20261,001-5,000989 contacts →

Exact match

“Shakespeare Martineau is a leading law firm that brings creativity, commerciality and clarity to complex challenges.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
7Exact matchPortland, OR, United StatesHQ recorded Sep 28, 2026501-1,000864 contacts →

Exact match

“Stoel Rives is a leading U.S.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
8Exact matchKöln, GermanyHQ recorded Sep 28, 2026501-1,000831 contacts →

Exact match

“Luther is a leading German commercial law firm that offers comprehensive legal and tax services.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
9Exact matchBridgeport, WV, United StatesHQ recorded Sep 28, 2026501-1,000757 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
10Exact matchParis, FranceHQ recorded Sep 28, 2026501-1,000735 contacts →

Exact match

“EY Société d’avocats se mobilise pour concrétiser les potentiels: c’est ainsi que nous faisons la différence pour nos clients, nos équipes et tous nos interlocuteurs.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
11Exact matchParis La Défense, FranceHQ recorded Sep 28, 2026501-1,000690 contacts →

Exact match

“Deloitte Société d'Avocats is one of the leading French law firms, specializing in international tax and legal strategies.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
12Exact matchCiudad De Mexico, MexicoHQ recorded Sep 28, 2026501-1,000683 contacts →

Exact match

“Chevez Ruiz Zamarripa, es una firma especializada en la Asesoría y Consultoría Fiscal de alto nivel, que se distingue por prestar servicios personalizados con total…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
13Exact matchCourbevoie, FranceHQ recorded Sep 28, 2026501-1,000669 contacts →

Exact match

“Les entreprises de toutes tailles sont exposées à des dispositions de plus en plus complexes en matière de réglementations fiscales et juridiques sur leur territoire national et…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
14Exact matchSyracuse, NY, United StatesHQ recorded Sep 28, 2026201-500581 contacts →

Exact match

“Bond is a full-service law firm counseling individuals, companies, not-for-profits and public sector entities in a wide spectrum of practice areas.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
15Exact matchMilano, ItalyHQ recorded Sep 28, 2026201-500514 contacts →

Exact match

“Fondato nel ADVANT Nctm è uno studio legale indipendente con oltre 360 avvocati e dottori commercialisti, uno dei principali in Italia.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
16Exact matchDublin, IrelandHQ recorded Sep 28, 2026201-500507 contacts →

Exact match

“As one of Ireland's largest law firms, William Fry LLP offers unrivalled legal and tax expertise across the full breadth of the business sector.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
17Exact matchCosta Del Este, PanamaHQ recorded Sep 28, 2026501-1,000484 contacts →

Exact match

“Morgan & Morgan is a full-service Panamanian law firm, regularly assisting local and multinational corporations from different industries, as well as recognized financial…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
18Exact matchBirmingham, AL, United StatesHQ recorded Sep 28, 2026201-500472 contacts →

Exact match

“Balch & Bingham LLP is a full-service corporate law firm recognized nationally for its genuine dedication to its clients, forward-thinking approach, and ability to anticipate what…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
19Exact matchBaton Rouge, LA, United StatesHQ recorded Sep 28, 2026201-500452 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
20Exact matchOklahoma City, OK, United StatesHQ recorded Sep 28, 2026201-500403 contacts →

Exact match

“By rigorously maintaining the highest standards of legal excellence, the Oklahoma-based law firm of McAfee & Taft has grown to become one of the largest and most respected…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
21Exact matchSalt Lake City, UT, United StatesHQ recorded Sep 28, 2026201-500381 contacts →

Exact match

“Parsons Behle & Latimer offers the resources and capabilities of a large and diverse firm, coupled with the highest levels of accessibility and responsiveness.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
22Exact matchMontevideo, UruguayHQ recorded Sep 28, 2026201-500337 contacts →

Exact match

“Guyer & Regules is proud to be considered as Uruguay’s first choice for international and domestic complex legal, accounting and tax work.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
23Exact matchDallas, TX, United StatesHQ recorded Sep 28, 2026501-1,000327 contacts →

Exact match

“Thompson & Knight is now known as Holland & Knight.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
24Exact matchPortland, ME, United StatesHQ recorded Sep 28, 2026201-500320 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
25Exact matchCerritos, CA, United StatesHQ recorded Sep 28, 2026501-1,000294 contacts →

Exact match

“Chugh, LLP is a full-service law and tax firm with offices in Los Angeles, Santa Clara, San Diego, and Newark in CA, Edison, NJ, Atlanta, GA, Herndon, VA, New York, NY, Brentwood…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase

Showing 25 of 6,058 energy tax law firms worldwide

See the full list, filter by size, metro and specialty, and access 28,797 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Energy tax law firms worldwide at a glance

As of Sep 28, 2026
39.5%Verified-email coverage
12.0Average contacts per company
1-10Median size (employees)
4.4%Largest-city concentration · Sao Paulo
Sep 28, 2026Page data refreshed

Companies by employee count

1-10
3,690
11-50
1,926
51-200
305
201-500
55
501-1,000
20
1,001-5,000
7
5,001-10,000
2
10001+
2

Email recency is reported on each country list linked below.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
Coverage
Every country. Country and city lists for energy tax law firms are linked below.
What qualifies
Company records worldwide whose business descriptions match “energy tax law firms” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 28,797 professional contacts with verified work emails across the full matched dataset. 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.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Energy tax law firms by location

40 lists · largest first

Every Energy tax 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 SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “energy tax law firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many energy tax law firms are there worldwide?

RevenueBase identified 6,058 company matches for energy tax law firms worldwide as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

A&o Shearman tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which country has the most energy tax law firms?

Brazil leads with 1,086 companies, followed by Germany (824) and the United States (665). Every energy tax law firms list by country and city is linked on this page.

Which city has the most energy tax law firms?

Sao Paulo leads with 268 company records, followed by Paris (156) and Madrid (91).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 28,797 professional contacts with verified work emails tracked across these 6,058 companies; direct dials are available where recorded.

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 SmartSearch, 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.