Company lists · Data refreshed September 2026

Top 25 Energy law firms based in the United States

There are 3,243 energy law firms headquartered in the United States (RevenueBase, September 2026). RevenueBase tracks 124,944 professional contacts across them, including 69,375 with verified work emails and 63,860 with mobile numbers. Houston is the largest hub.

This list covers energy 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, how directly it supports the match, and when it was last checked. Data refreshed September 2, 2026.

3,243Companies
124,944Contacts tracked
69,375Verified emails
63,860Mobile numbers
Unlock all 3,243 companies Free account · no credit card · 2 minutes

The 25 largest energy law firms based in the United States

Ranked by team size
Top 25 of 3,243 energy law firms based in the United States, ranked by team size, largest first. Data refreshed Sep 2, 2026. Evidence rates how directly each company's own description names energy law firms: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#CompanyHeadquartersEmployeesContactsVerified emails
1
A&o ShearmanPartial 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: company website · checked Sep 2, 2026
Austin, TX, United States5,001-10,0006,5933,395
2
K&l GatesIndirect evidence

“At K&L Gates, we foster an inclusive and collaborative environment across our fully integrated global platform that enables us to diligently combine the knowledge and expertise of…”

Source: company website · checked Sep 2, 2026
Miami, FL, United States1,001-5,0004,8512,253
3
Foley & Lardner LLPPartial evidence

“Foley & Lardner LLP stands at the nexus of the Energy & Infrastructure, Health Care & Life Sciences, Innovative Technology, and Manufacturing Sectors.”

Source: company website · checked Sep 2, 2026
Boston, MA, United States1,001-5,0002,8941,589
4
Arnold & PorterIndirect evidence

“Arnold & Porter combines sophisticated regulatory, litigation, and transactional capabilities to resolve clients’ most complex issues.”

Source: company website · checked Sep 2, 2026
Washington, DC, United States1,001-5,0002,3241,648
5
Dechert LLPPartial evidence

“Dechert is the law firm that helps business leaders lead.”

Source: company website · checked Sep 2, 2026
Philadelphia, PA, United States1,001-5,0002,0561,116
6

“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: company website · checked Sep 2, 2026
Columbia, SC, United States1,001-5,0002,0361,215
7

“At Taft, we work as one team, driven and committed to helping you succeed.”

Source: company website · checked Sep 2, 2026
Indianapolis, IN, United States1,001-5,0001,9631,418
8
Troutman Pepper Locke LLPIndirect evidence

“Troutman Pepper Locke LLP helps clients solve complex legal challenges and achieve their business goals in an ever-changing global economy.”

Source: company website · checked Sep 2, 2026
United States1,001-5,0001,8671,551
9
Venable LLPPartial 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: company website · checked Sep 2, 2026
Washington, DC, United States1,001-5,0001,7911,184
10
Ballard Spahr LLPPartial evidence

“Ballard Spahr LLP, an Am Law 100 law firm with more than 750 lawyers in 19 U.S.”

Source: company website · checked Sep 2, 2026
Washington D.C., DC, United States1,001-5,0001,7201,097
11
Crowell & MoringPartial evidence

“Crowell & Moring is an international law firm with operations in the United States, Europe, MENA, and Asia.”

Source: company website · checked Sep 2, 2026
Chicago, IL, United States1,001-5,0001,6261,053
12
Haynes And Boone, LLPStrong 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: company website · checked Sep 2, 2026
The Woodlands, TX, United States1,001-5,0001,563950
13
Baker BottsPartial evidence

“Baker Botts is an international law firm whose lawyers practice throughout a network of offices around the globe.”

Source: company website · checked Sep 2, 2026
Austin, TX, United States1,001-5,0001,510856
14
Quarles & Brady LLPIndirect evidence

“For over 125 years, Quarles & Brady LLP has provided quality legal services to a wide range of industries on a national stage.”

Source: company website · checked Sep 2, 2026
Milwaukee, WI, United States1,001-5,0001,333795
15
MINTZStrong evidence

“Mintz is a full-service law firm serving clients in the life sciences, energy, private equity, and technology industries.”

Source: company website · checked Sep 2, 2026
New York, United States1,001-5,0001,318691
16
Snell & WilmerPartial evidence

“Founded in 1938, Snell & Wilmer is a full-service business law firm with more than 500 lawyers practicing in 17 locations throughout the United States and in Mexico.”

Source: company website · checked Sep 2, 2026
Palo Alto, CA, United States501-1,0001,233714
17

“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: company website · checked Sep 2, 2026
Pittsburgh, PA, United States501-1,0001,204622
18
Hinshaw & Culbertson LLPPartial evidence

“Hinshaw & Culbertson LLP is a U.S-based law firm with offices nationwide.”

Source: company website · checked Sep 2, 2026
Irvine, CA, United States501-1,0001,193640
19
Jackson Walker LLPPartial evidence

“Jackson Walker is a Texas-based law firm with a national presence and global reach.”

Source: company website · checked Sep 2, 2026
San Antonio, TX, United States501-1,0001,006537
20
Bracewell LLPPartial evidence

“Bracewell LLP is a leading law and government relations firm.”

Source: company website · checked Sep 2, 2026
Austin, TX, United States501-1,000943442
21

“For decades, we’ve positioned ourselves at the intersection of law, business and policy to bring a multidisciplinary strategy to every issue.”

Source: company website · checked Sep 2, 2026
Las Vegas, NV, United States501-1,000896617
22
Stoel Rives LLPIndirect evidence

“Stoel Rives is a leading U.S.”

Source: company website · checked Sep 2, 2026
Boise, ID, United States501-1,000871449
23
Benesch LAWPartial evidence

“Benesch is an Am Law 200 business law firm and limited liability partnership with offices in Chicago, Cleveland, Columbus, New York, San Francisco and Wilmington.”

Source: company website · checked Sep 2, 2026
New York, NY, United States501-1,000853614
24
Hall Booth Smith, P.CPartial evidence

“Established in 1989, Hall Booth Smith, P.C.(HBS) is a full-service law firm with 32 offices across the United States.”

Source: company website · checked Sep 2, 2026
Missoula, MT, United States501-1,000802609
25
Carlton FieldsIndirect evidence

“We view the world from our clients’ perspectives, helping them to lead and innovate across industries and around the globe.”

Source: company website · checked Sep 2, 2026
Hartford, CT, United States501-1,000801443

Showing 25 of 3,243 energy law firms based in the United States

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Energy law firms based in the United States at a glance

As of Sep 2, 2026
1-10Median size (employees)
HoustonLargest hub · 154 HQs
63,860Contacts with mobile numbers
Sep 2, 2026Data refreshed

Companies by employee count

1-10
1,752
11-50
1,024
51-200
329
201-500
74
501-1,000
30
1,001-5,000
19
5,001-10,000
2

Energy law firms by metro

MetroCompanies
Energy law firms in Houston154
Energy law firms in New York116
Energy law firms in Washington103
Energy law firms in Dallas81
Energy law firms in Chicago77
Energy law firms in Austin72
Energy law firms in Denver63
Energy law firms in Los Angeles52

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 law firms, so some rows will be adjacent to the category rather than pure plays. The description and evidence rating on every row are there so you can check each match yourself.

Source
The RevenueBase company graph: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
What qualifies
Companies headquartered in the United States whose own description of what they do matches “energy law firms”. Matching reads each company's description, not its industry code or its name.
What we exclude
Companies whose own description does not clearly place them among energy 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 an evidence rating so you can judge each match yourself.
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, 69,375 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 2, 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.

Frequently asked

How many energy law firms are there based in the United States?

There are 3,243 energy law firms headquartered in the United States as of September 2026 (RevenueBase).

What is the largest company on this list?

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

Which city has the most energy law firms?

Houston leads with 154 headquartered companies, followed by New York (116) and Washington (103).

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 69,375 verified decision-maker contacts tracked across these 3,243 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 2, 2026.

Ready to reach these companies? Verified emails and direct dials for all 3,243 energy law firms based in the United States. Start with a free account, no credit card.

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About this data

RevenueBase is a B2B contact data platform. Its company graph covers 21.3 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, the same data that powers RevenueBase's B2B data products and the free research portal.