Company lists · Data refreshed September 2026

Top 25 Utility regulation law firms based in the United States

Name: Utility regulation law firms based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 29, 2026 579 companies tracked

RevenueBase identified 579 utility regulation law firms headquartered in the United States as of September 2026 and tracks 22,067 professional contacts across them, including 13,225 with verified work emails. Washington is the largest hub.

This list covers utility regulation 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, 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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 29, 2026 86% judged on-target in blind review

579Companies

22,067Contacts tracked

13,225Verified emails

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The 25 largest utility regulation law firms based in the United States

Ranked by team size

Top 25 of 579 utility regulation law firms based in the United States, ranked by team size, largest first. Data refreshed Sep 29, 2026. RevenueBase Smart Search rates how each company's information relates to utility regulation 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	Nelson Mullins Riley & Scarborough	Partial evidence	Columbia, SC, United StatesHQ checked Sep 29, 2026	1,001-5,000	2,012 contacts →
	Partial evidence “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: RevenueBase Database · checked Sep 29, 2026
2	Venable LLP	Partial evidence	Washington, DC, United StatesHQ checked Sep 29, 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 29, 2026
3	Ballard Spahr LLP	Partial evidence	Philadelphia, PA, United StatesHQ checked Sep 29, 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 29, 2026
4	Buchanan Ingersoll & Rooney PC	Partial evidence	Pittsburgh, PA, United StatesHQ checked Sep 29, 2026	501-1,000	1,197 contacts →
	Partial 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 29, 2026
5	Brownstein Hyatt Farber Schreck	Partial evidence	Denver, CO, United StatesHQ checked Sep 29, 2026	501-1,000	902 contacts →
	Partial evidence “For decades, we’ve positioned ourselves at the intersection of law, business and policy to bring a multidisciplinary strategy to every issue.” Source: RevenueBase Database · checked Sep 29, 2026
6	Stoel Rives LLP	Indirect evidence	Portland, OR, United StatesHQ checked Sep 29, 2026	501-1,000	864 contacts →
	Indirect evidence “Stoel Rives is a leading U.S.” Source: RevenueBase Database · checked Sep 29, 2026
7	Steptoe & Johnson Pllc	Partial evidence	Bridgeport, WV, United StatesHQ checked Sep 29, 2026	501-1,000	757 contacts →
	Partial 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 29, 2026
8	Parker POE Adams & Bernstein LLP	Partial evidence	Charlotte, NC, United StatesHQ checked Sep 29, 2026	501-1,000	584 contacts →
	Partial evidence “Businesses and local governments turn to Parker Poe to structure transactions, navigate regulations, and resolve disputes.” Source: RevenueBase Database · checked Sep 29, 2026
9	Wiley Rein LLP	Indirect evidence	Washington, DC, United StatesHQ checked Sep 29, 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 29, 2026
10	Best Best & Krieger LLP BBK	Indirect evidence	Riverside, CA, United StatesHQ checked Sep 29, 2026	201-500	522 contacts →
	Indirect evidence “Best Best & Krieger serves as a trusted partner and strategist to public and private sector clients across the nation.” Source: RevenueBase Database · checked Sep 29, 2026
11	Balch & Bingham LLP	Partial evidence	Birmingham, AL, United StatesHQ checked Sep 29, 2026	201-500	472 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 29, 2026
12	Kean Miller	Indirect evidence	Baton Rouge, LA, United StatesHQ checked Sep 29, 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 29, 2026
13	Post & Schell, P.C	Indirect evidence	Philadelphia, PA, United StatesHQ checked Sep 29, 2026	201-500	336 contacts →
	Indirect evidence “For over 50 years, Post & Schell’s attorneys have combined the operational knowledge and insight into the industries they represent with creative legal solutions – and helped…” Source: RevenueBase Database · checked Sep 29, 2026
14	Nossaman LLP	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 29, 2026	201-500	332 contacts →
	Partial evidence “Nossaman LLP is a national law firm with attorneys and policy advisors located in 12 offices throughout the United States.” Source: RevenueBase Database · checked Sep 29, 2026
15	Thompson & Knight LLP	Indirect evidence	Dallas, TX, United StatesHQ checked Sep 29, 2026	501-1,000	327 contacts →
	Indirect evidence “Thompson & Knight is now known as Holland & Knight.” Source: RevenueBase Database · checked Sep 29, 2026
16	Pierce Atwood LLP	Partial evidence	Portland, ME, United StatesHQ checked Sep 29, 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 29, 2026
17	Mcnees Wallace & Nurick	Partial evidence	Harrisburg, PA, United StatesHQ checked Sep 29, 2026	201-500	307 contacts →
	Partial evidence “Since 1935, McNees Wallace & Nurick has been a trusted, client-focused law firm delivering practical, results-driven legal solutions to businesses, individuals, and organizations.” Source: RevenueBase Database · checked Sep 29, 2026
18	Davis Graham & Stubbs LLP	Partial evidence	Denver, CO, United StatesHQ checked Sep 29, 2026	201-500	283 contacts →
	Partial 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 29, 2026
19	Liskow	Indirect evidence	New Orleans, LA, United StatesHQ checked Sep 29, 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 29, 2026
20	Keller And Heckman LLP	Partial evidence	Washington, DC, United StatesHQ checked Sep 29, 2026	51-200	230 contacts →
	Partial 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 29, 2026
21	Downey Brand LLP	Indirect evidence	Sacramento, CA, United StatesHQ checked Sep 29, 2026	51-200	217 contacts →
	Indirect evidence “Clients turn to Downey Brand for efficient and practical legal advice.” Source: RevenueBase Database · checked Sep 29, 2026
22	VAN Ness Feldman LLP	Partial evidence	Washington, DC, United StatesHQ checked Sep 29, 2026	51-200	174 contacts →
	Partial 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 29, 2026
23	Mcginnis Lochridge	Indirect evidence	Austin, TX, United StatesHQ checked Sep 29, 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 29, 2026
24	Fee, Smith & Sharp LLP	Partial evidence	Dallas, TX, United StatesHQ checked Sep 29, 2026	51-200	147 contacts →
	Partial evidence “With strong Texas roots and a reputation for success in high-stakes litigation, Fee, Smith & Sharp is a national law firm providing incisive, industry-leading business, legal and…” Source: RevenueBase Database · checked Sep 29, 2026
25	Wilkinson Barker Knauer, LLP	Partial evidence	Washington, DC, United StatesHQ checked Sep 29, 2026	51-200	138 contacts →
	Partial evidence “With offices in Washington, DC, Denver, Colorado, and Austin, Texas, Wilkinson Barker Knauer (WBK) is the nation’s largest stand-alone communications and technology law firm.” Source: RevenueBase Database · checked Sep 29, 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: utility regulation 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 utility regulation law firms.
Partial evidence: Its own public description names part of utility regulation law firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name utility regulation 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 579 utility regulation law firms based in the United States

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Utility regulation law firms based in the United States at a glance

As of Sep 29, 2026

59.9%Verified-email coverage

38.1Average contacts per company

1-10Median size (employees)

9.8%Largest-city concentration · Washington

Sep 29, 2026Page data refreshed

Companies by employee count

1-10

332

11-50

177

51-200

201-500

501-1,000

1,001-5,000

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 579 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 utility regulation 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 the United States whose own description of what they do matches “utility regulation 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 utility regulation 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 utility regulation 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 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, 13,225 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.

Utility regulation law firms by metro

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 utility regulation 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 utility regulation law firms are there based in the United States?

RevenueBase identified 579 utility regulation law firms headquartered in the 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?

Nelson Mullins Riley & Scarborough, headquartered in Columbia, tops this list with the largest team on record.

Which city has the most utility regulation law firms?

Washington leads with 57 headquartered companies, followed by Austin (32) and Houston (32).

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 13,225 verified decision-maker contacts tracked across these 579 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.