Company lists · Data refreshed September 2026

Top 25 Environmental law firms based in Los Angeles, United States

Name: Environmental law firms based in Los Angeles, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 12, 2026 76 companies tracked

RevenueBase identified 76 environmental law firms headquartered in Los Angeles, United States as of September 2026 and tracks 5,797 professional contacts across them, including 3,766 with verified work emails and 3,108 with mobile numbers. Washington is the largest hub.

This list covers environmental law firms headquartered in Los Angeles, 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 12, 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 12, 2026 86% judged on-target in blind review

76Companies

5,797Contacts tracked

3,766Verified emails

3,108Mobile numbers

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The 25 largest environmental law firms based in Los Angeles, United States

Ranked by team size

Top 25 of 76 environmental law firms based in Los Angeles, United States, ranked by team size, largest first. Data refreshed Sep 12, 2026. RevenueBase Smart Search rates how each company's information relates to environmental 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	Allen Matkins	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 12, 2026	201-500	527 contacts →
	Partial evidence “Allen Matkins, a law firm with over 285 attorneys, was founded with deep roots in real estate and has leveraged that foundation to grow and build prominent litigation, corporate…” Source: RevenueBase Database · checked Sep 12, 2026
2	Munger, Tolles & Olson LLP	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 12, 2026	201-500	521 contacts →
	Indirect evidence “Munger, Tolles & Olson is a 200-lawyer firm based in Los Angeles with a national practice representing clients in a broad range of complex and high-profile matters.” Source: RevenueBase Database · checked Sep 12, 2026
3	Nossaman LLP	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 12, 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 12, 2026
4	Cox, Castle & Nicholson LLP	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 12, 2026	201-500	270 contacts →
	Indirect evidence “Cox, Castle & Nicholson LLP was founded in Los Angeles in 1968, with the goal of providing superior and comprehensive legal services to businesses, institutions, and individuals…” Source: RevenueBase Database · checked Sep 12, 2026
5	Jeffer Mangels Butler & Mitchell LLP	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 12, 2026	201-500	258 contacts →
	Partial evidence “Jeffer Mangels Butler & Mitchell LLP (JMBM) is a full service law firm of approximately 120 lawyers.” Source: RevenueBase Database · checked Sep 12, 2026
6	Musick, Peeler & Garrett	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 12, 2026	201-500	204 contacts →
	Partial evidence “Musick Peeler, a premier law firm with over 80 attorneys across five offices in major commercial centers of California, exemplifies excellence in legal service.” Source: RevenueBase Database · checked Sep 12, 2026
7	Glaser Weil	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 12, 2026	51-200	172 contacts →
	Partial evidence “Glaser Weil is a premier law firm headquartered in Los Angeles with outstanding experience and market-leading successes in litigation, corporate, intellectual property and real…” Source: RevenueBase Database · checked Sep 12, 2026
8	Haight Brown & Bonesteel	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 12, 2026	51-200	157 contacts →
	Indirect evidence “From civil litigation to business transactions, Haight Brown & Bonesteel LLP provides practical and effective resolution advice to the most perplexing disputes, ranging from early…” Source: RevenueBase Database · checked Sep 12, 2026
9	Richards Watson Gershon	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 12, 2026	51-200	104 contacts →
	Indirect evidence “Richards, Watson & Gershon delivers practical advice and solutions tailored to the unique needs of public entities.” Source: RevenueBase Database · checked Sep 12, 2026
10	Hill, Farrer & Burrill LLP	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 12, 2026	51-200	67 contacts →
	Indirect evidence “Hill Farrer attorneys have successfully handled thousands of transactions and won thousands of cases.” Source: RevenueBase Database · checked Sep 12, 2026
11	Yukevich Cavanaugh	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 12, 2026	51-200	66 contacts →
	Indirect evidence “Founded in 1995, Yukevich \| Cavanaugh is one of the nation’s top litigation firms, providing innovative and aggressive case management and trial techniques at all stages of…” Source: RevenueBase Database · checked Sep 12, 2026
12	King, Holmes, Paterno & Soriano, LLP	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 12, 2026	11-50	56 contacts →
	Indirect evidence “The attorneys at King, Holmes, Paterno & Soriano, LLP provide innovative thinking, cutting edge deal making and powerful litigation and business strategies to our clients.” Source: RevenueBase Database · checked Sep 12, 2026
13	Yoka Smith, LLP	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 12, 2026	51-200	47 contacts →
	Indirect evidence “At Yoka \| Smith, our focus is representing businesses in high-exposure lawsuits in a variety of legal practice areas.” Source: RevenueBase Database · checked Sep 12, 2026
14	Hurrell Cantrall LLP	Strong evidence	Los Angeles, CA, United StatesHQ checked Sep 12, 2026	11-50	43 contacts →
	Strong evidence “Hurrell Cantrall LLP is a civil defense litigation and appellate firm that concentrates in the areas of employment law, environmental law, general liability, governmental entity…” Source: RevenueBase Database · checked Sep 12, 2026
15	Orbach Huff & Henderson LLP	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 12, 2026	11-50	41 contacts →
	Indirect evidence “David Orbach and David Huff founded the firm in 1997 and Phil Henderson joined in 2009.” Source: RevenueBase Database · checked Sep 12, 2026
16	Chapman Glucksman	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 12, 2026	11-50	30 contacts →
	Partial evidence “Founded in 1985, Chapman Glucksman is a multi-faceted law firm with offices in Los Angeles, Orange County, Sacramento and the Bay Area.” Source: RevenueBase Database · checked Sep 12, 2026
17	LTL Attorneys LLP	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 12, 2026	51-200	29 contacts →
	Indirect evidence “Trusted by general counsel of leading global companies, our highly skilled lawyers focus solely on trials and litigation.” Source: RevenueBase Database · checked Sep 12, 2026
18	Koletsky Mancini Feldman LLP	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 12, 2026	11-50	29 contacts →
	Indirect evidence “Koletsky, Mancini, Feldman & Morrow was founded in 1987 with one goal in mind, to provide its clients with the highest quality legal services in the most cost effective manner…” Source: RevenueBase Database · checked Sep 12, 2026
19	Pond North LLP	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 12, 2026	11-50	27 contacts →
	Indirect evidence “Pond North LLP provides strategic litigation defense to its clients.” Source: RevenueBase Database · checked Sep 12, 2026
20	Lee, Hong, Degerman, Kang & Waimey	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 12, 2026	51-200	26 contacts →
	Indirect evidence “Established in 1991, LHDK & W has helped industry leaders across a broad array of sectors manage the complex challenges of succeeding in the global economy.” Source: RevenueBase Database · checked Sep 12, 2026
21	Impact Sciences	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 12, 2026	11-50	18 contacts →
	Indirect evidence “Informing communities and creating a clear path to understanding are at the core of what we do at Impact Sciences.” Source: RevenueBase Database · checked Sep 12, 2026
22	Park Lawless & Tremonti LLP	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 12, 2026	11-50	17 contacts →
	Partial evidence “With more than a century of combined experience at some of the preeminent Am Law 50 international law firms, our lawyers bring extensive experience in complex litigation and…” Source: RevenueBase Database · checked Sep 12, 2026
23	Manning, Leaver, Bruder & Berberich, LLP	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 12, 2026	11-50	12 contacts →
	Indirect evidence “We at Manning, Leaver, Bruder & Berberich, LLP are proud that for over 95 years our clients have trusted us to help them with their legal needs.” Source: RevenueBase Database · checked Sep 12, 2026
24	Booth LLP	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 12, 2026	11-50	11 contacts →
	Indirect evidence “BOOTH LLP is a dynamic firm of skilled, veteran attorneys, specializing in efficient, aggressive representation of our clients in litigation and transactional matters.” Source: RevenueBase Database · checked Sep 12, 2026
25	Rand Paster & Nelson LLP	Strong evidence	Los Angeles, CA, United StatesHQ checked Sep 12, 2026	1-10	11 contacts →
	Strong evidence “Rand Paster & Nelson LLP is a boutique law firm practicing in the fields of land use, government, municipal advocacy, and environmental law, including associated litigation.” Source: RevenueBase Database · checked Sep 12, 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: environmental 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 environmental law firms.
Partial evidence: Its own public description names part of environmental law firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name environmental 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 76 environmental law firms based in Los Angeles, United States

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Environmental law firms based in Los Angeles, United States at a glance

As of Sep 12, 2026

65.0%Verified-email coverage

53.6%Mobile-number coverage

76.3Average contacts per company

11-50Median size (employees)

175.0%Largest-city concentration · Washington

Sep 12, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

1,001-5,000

Freshness & accuracy

How recently the business emails were verified and the company information checked

Email last verified

Median 15.0d

3,1990–30

53431–60

2461–90

590–180

4180+

Company record updated

Median 69.0d

00–30

2,79831–60

2,28761–90

46190–180

251180+

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 environmental 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 Los Angeles, United States whose own description of what they do matches “environmental 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 environmental 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 environmental law firms, and records with no verified work email. Companies headquartered outside Los Angeles 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, 3,766 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 12, 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.

Environmental law firms by metro in the United States

Environmental law firms in Washington133
Environmental law firms in New York127
Environmental law firms in Houston112
Environmental law firms in Chicago77
Environmental law firms in Los Angeles71
Environmental law firms in Austin62
Environmental law firms in San Francisco58
Environmental law firms in Dallas58

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 environmental 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 environmental law firms are there based in Los Angeles, United States?

RevenueBase identified 76 environmental law firms headquartered in Los Angeles, 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?

Allen Matkins, headquartered in Los Angeles, tops this list with the largest team on record.

Which city has the most environmental law firms?

Washington leads with 133 headquartered companies, 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 the top results, verified emails and direct dials included. Upgrading unlocks all 3,766 verified decision-maker contacts tracked across these 76 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 12, 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.