Company lists · Data refreshed September 2026

Top 25 Environmental law firms based in the United States

RevenueBase identified 4,078 company matches for environmental law firms associated with the United States as of September 2026 and tracks 136,371 professional contacts across them, including 75,547 with verified work emails and 73,456 with mobile numbers. Washington is the largest hub.

This list covers company matches for environmental law firms associated with the United States, 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 2, 2026.

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 2, 2026 How this list was built
4,078Companies
136,371Contacts tracked
75,547Verified emails
73,456Mobile numbers
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The 25 largest environmental law firms based in the United States

Ranked by team size
Top 25 of 4,078 company matches for environmental law firms based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 2, 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 matchMiami, FL, United States1,001-5,0004,851 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Sep 2, 2026 · View company records in RevenueBase
2Exact matchPalo Alto, CA, United States1,001-5,0003,314 contacts →

Exact match

“Clients partner with Cooley on transformative deals, complex IP and regulatory matters, and high-stakes litigation.”

Recorded in the RevenueBase company graph · Sep 2, 2026 · View company records in RevenueBase
3Exact matchBoston, MA, United States1,001-5,0002,894 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Sep 2, 2026 · View company records in RevenueBase
4Exact matchWashington, DC, United States1,001-5,0002,660 contacts →

Exact match

“Morrison Foerster transforms complexity into advantage.”

Recorded in the RevenueBase company graph · Sep 2, 2026 · View company records in RevenueBase
5Exact matchWashington, DC, United States1,001-5,0002,324 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Sep 2, 2026 · View company records in RevenueBase
6Exact matchCharlotte, NC, United States1,001-5,0002,176 contacts →

Exact match

“High stakes.”

Recorded in the RevenueBase company graph · Sep 2, 2026 · View company records in RevenueBase
7Exact matchPhiladelphia, PA, United States1,001-5,0002,056 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Sep 2, 2026 · View company records in RevenueBase
8Exact matchColumbia, SC, United States1,001-5,0002,036 contacts →

Exact match

“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.”

Recorded in the RevenueBase company graph · Sep 2, 2026 · View company records in RevenueBase
9Exact matchIndianapolis, IN, United States1,001-5,0001,963 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Sep 2, 2026 · View company records in RevenueBase
10Exact matchWashington, DC, United States1,001-5,0001,791 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Sep 2, 2026 · View company records in RevenueBase
11Exact matchWashington D.C., DC, United States1,001-5,0001,720 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Sep 2, 2026 · View company records in RevenueBase
12Exact matchChicago, IL, United States1,001-5,0001,626 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Sep 2, 2026 · View company records in RevenueBase
13Exact matchMilwaukee, WI, United States1,001-5,0001,333 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Sep 2, 2026 · View company records in RevenueBase
14Exact matchPittsburgh, PA, United States501-1,0001,204 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 2, 2026 · View company records in RevenueBase
15Exact matchChicago, IL, United States501-1,0001,179 contacts →

Exact match

“At Jenner & Block, we shape what’s next through experience, vision, and judgment.”

Recorded in the RevenueBase company graph · Sep 2, 2026 · View company records in RevenueBase
16Exact matchDenver, CO, United States501-1,0001,170 contacts →

Exact match

“Stinson LLP collaborates with clients ranging from individuals and privately held enterprises to national companies and international public corporations.”

Recorded in the RevenueBase company graph · Sep 2, 2026 · View company records in RevenueBase
17Exact matchSan Antonio, TX, United States501-1,0001,006 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Sep 2, 2026 · View company records in RevenueBase
18Exact matchAustin, TX, United States501-1,000943 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Sep 2, 2026 · View company records in RevenueBase
19Exact matchPhiladelphia, PA, United States501-1,000918 contacts →

Exact match

“Inspired People.”

Recorded in the RevenueBase company graph · Sep 2, 2026 · View company records in RevenueBase
20Exact matchLas Vegas, NV, United States501-1,000896 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Sep 2, 2026 · View company records in RevenueBase
21Exact matchBoise, ID, United States501-1,000871 contacts →

Exact match

“Stoel Rives is a leading U.S.”

Recorded in the RevenueBase company graph · Sep 2, 2026 · View company records in RevenueBase
22Exact matchNew York, NY, United States501-1,000853 contacts →

Exact match

“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.”

Recorded in the RevenueBase company graph · Sep 2, 2026 · View company records in RevenueBase
23Exact matchMankato, MN, United States501-1,000852 contacts →

Exact match

“At Fredrikson, we’ve built a reputation as the firm “where law and business meet” by bringing business acumen and entrepreneurial thinking to our work with clients, and by…”

Recorded in the RevenueBase company graph · Sep 2, 2026 · View company records in RevenueBase
24Exact matchMissoula, MT, United States501-1,000802 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Sep 2, 2026 · View company records in RevenueBase
25Exact matchHartford, CT, United States501-1,000801 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Sep 2, 2026 · View company records in RevenueBase

Showing 25 of 4,078 environmental law firms based in the United States

See the full list, filter by size, metro and specialty, and access 75,547 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Environmental law firms based in the United States at a glance

As of Sep 2, 2026
55.4%Verified-email coverage
53.9%Mobile-number coverage
33.4Average contacts per company
1-10Median size (employees)
3.3%Largest-city concentration · Washington
Sep 2, 2026Page data refreshed

Companies by employee count

1-10
2,190
11-50
1,329
51-200
398
201-500
90
501-1,000
33
1,001-5,000
18
5,001-10,000
1

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.
What qualifies
Company records associated with the United States whose business descriptions match “environmental 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. Where headquarters information is recorded, preview rows are also filtered to this page’s location. 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 75,547 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 2, 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.

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 “environmental law firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

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

RevenueBase identified 4,078 company matches for environmental law firms associated with the United States 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?

K&l Gates tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most environmental law firms?

Washington leads with 133 company records, followed by New York (127) and Houston (112).

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 75,547 professional contacts with verified work emails tracked across these 4,078 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 2, 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.