Company lists · Data refreshed September 2026

Top 25 Environmental law firms based in Chicago, United States

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

Compiled by the RevenueBase Data Team Data refreshed Sep 12, 2026 83 companies tracked

RevenueBase identified 83 environmental law firms headquartered in Chicago, United States as of September 2026 and tracks 5,825 professional contacts across them, including 3,201 with verified work emails and 3,303 with mobile numbers. Washington is the largest hub.

This list covers environmental law firms headquartered in Chicago, 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

83Companies

5,825Contacts tracked

3,201Verified emails

3,303Mobile numbers

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The 25 largest environmental law firms based in Chicago, United States

Ranked by team size

Top 25 of 83 environmental law firms based in Chicago, 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	Seyfarth Shaw LLP	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 12, 2026	1,001-5,000	2,167 contacts →
	Indirect evidence “High stakes.” Source: RevenueBase Database · checked Sep 12, 2026
2	Jenner & Block	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 12, 2026	501-1,000	1,194 contacts →
	Indirect evidence “At Jenner & Block, we shape what’s next through experience, vision, and judgment.” Source: RevenueBase Database · checked Sep 12, 2026
3	Neal, Gerber & Eisenberg LLP	Partial evidence	Chicago, IL, United StatesHQ checked Sep 12, 2026	201-500	353 contacts →
	Partial evidence “Neal Gerber Eisenberg is a Chicago-based law firm whose attorneys share a culture of teamwork and devotion to personalized client service to advance our clients’ business…” Source: RevenueBase Database · checked Sep 12, 2026
4	Edelson PC	Partial evidence	Chicago, IL, United StatesHQ checked Sep 12, 2026	51-200	125 contacts →
	Partial evidence “EDELSON PC is a law firm concentrating on high-stake’s plaintiff’s work ranging from class and mass actions to public client investigations and prosecutions.” Source: RevenueBase Database · checked Sep 12, 2026
5	Masuda Funai	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 12, 2026	51-200	102 contacts →
	Indirect evidence “Since its founding in 1929, Masuda Funai has focused its practice on successfully representing international and domestic companies entering, operating and expanding in the United…” Source: RevenueBase Database · checked Sep 12, 2026
6	Franczek P.C	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 12, 2026	51-200	73 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 12, 2026
7	Robbins Schwartz	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 12, 2026	51-200	69 contacts →
	Indirect evidence “We are a team of problem solvers.” Source: RevenueBase Database · checked Sep 12, 2026
8	Eimer Stahl LLP	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 12, 2026	51-200	65 contacts →
	Indirect evidence “Eimer Stahl is a boutique commercial litigation firm headquartered in Chicago, with offices in Madison, Silicon Valley, San Francisco, and Nashville.” Source: RevenueBase Database · checked Sep 12, 2026
9	Christensen HSU Sipes LLP	Partial evidence	Chicago, IL, United StatesHQ checked Sep 12, 2026	11-50	53 contacts →
	Partial evidence “Christensen Hsu Sipes LLP is a law firm with offices in Chicago, Northwest Indiana, Los Angeles, and Sacramento.” Source: RevenueBase Database · checked Sep 12, 2026
10	Carnow, Conibear & Assoc., LTD	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 12, 2026	11-50	52 contacts →
	Indirect evidence “Carnow, Conibear & Assoc, Ltd.(Carnow Conibear), a minority-owned, woman-owned and veteran-owned business, was established in 1975.” Source: RevenueBase Database · checked Sep 12, 2026
11	Esbrook P.C	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 12, 2026	51-200	44 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 12, 2026
12	Aeterra, LLC	Partial evidence	Chicago, IL, United StatesHQ checked Sep 12, 2026	11-50	43 contacts →
	Partial evidence “Aeterra is a full-service environmental and sustainability consulting firm that provides operating businesses and their owners with meaningful, practical, business-focused advice.” Source: RevenueBase Database · checked Sep 12, 2026
13	Hart Mclaughlin & Eldridge, LLC	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 12, 2026	11-50	42 contacts →
	Indirect evidence “trial lawyers.” Source: RevenueBase Database · checked Sep 12, 2026
14	Meckler Bulger Tilson Marick & Pearson LLP	Partial evidence	Chicago, IL, United StatesHQ checked Sep 12, 2026	51-200	40 contacts →
	Partial evidence “Meckler Bulger Tilson Marick & Pearson LLP (MBT) is one of the nation's leading litigation law firms - with a prominent record of important legal victories on behalf of some of…” Source: RevenueBase Database · checked Sep 12, 2026
15	Schain Banks	Partial evidence	Chicago, IL, United StatesHQ checked Sep 12, 2026	11-50	36 contacts →
	Partial evidence “Schain Banks is a Chicago-based law firm specializing in real estate, zoning, local government, energy, and litigation.” Source: RevenueBase Database · checked Sep 12, 2026
16	Shefsky & Froelich	Partial evidence	Chicago, IL, United StatesHQ checked Sep 12, 2026	51-200	33 contacts →
	Partial evidence “Shefsky & Froelich Ltd, a Chicago-based full-service law firm, was founded in 1970 by a small group of highly motivated attorneys with extensive experience in complex commercial…” Source: RevenueBase Database · checked Sep 12, 2026
17	Mohan Groble Scolaro, P.C	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 12, 2026	11-50	30 contacts →
	Indirect evidence “Mohan Groble Scolaro is nationally recognized for a broad range of sophisticated legal services that we provide to both publicly traded and privately held clients in all stages of…” Source: RevenueBase Database · checked Sep 12, 2026
18	Massey & Gail LLP	Partial evidence	Chicago, IL, United StatesHQ checked Sep 12, 2026	11-50	29 contacts →
	Partial evidence “A high-powered law firm for savvy companies, Massey & Gail offers creative solutions in counseling, litigation and appeals.” Source: RevenueBase Database · checked Sep 12, 2026
19	Hogan Marren Babbo & Rose, LTD	Partial evidence	Chicago, IL, United StatesHQ checked Sep 12, 2026	11-50	28 contacts →
	Partial evidence “Founded in 1993 by several attorneys previously affiliated with a large Chicago law firm, Hogan Marren, Ltd.” Source: RevenueBase Database · checked Sep 12, 2026
20	Shepard Schwartz & Harris LLP	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 12, 2026	1-10	26 contacts →
	Indirect evidence “As of July 2022, Shepard Schwartz & Harris LLP joined Citrin Cooperman.” Source: RevenueBase Database · checked Sep 12, 2026
21	Elrod Friedman LLP	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 12, 2026	11-50	22 contacts →
	Indirect evidence “Bridging the Gap between Public & Private Sectors In representing public and private sector clients, our attorneys provide unique legal insights and understandings that result in…” Source: RevenueBase Database · checked Sep 12, 2026
22	Miner, Barnhill & Galland, P.C	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 12, 2026	11-50	21 contacts →
	Indirect evidence “Founded in 1971, MBG represents a broad range of individual, government, non-profit and corporate clients with offices in Chicago, Ill, and Madison, Wis.” Source: RevenueBase Database · checked Sep 12, 2026
23	Chittenden, Murday & Novotny LLC	Indirect evidence	Chicago, United StatesHQ checked Sep 12, 2026	11-50	19 contacts →
	Indirect evidence “CMN is distinguished by its aggressive and business-minded approach to complex civil litigation, business litigation, and regulatory proceedings.” Source: RevenueBase Database · checked Sep 12, 2026
24	Carlson Environmental, A Nova Group, GBC Company	Partial evidence	Chicago, IL, United StatesHQ checked Sep 12, 2026	11-50	17 contacts →
	Partial evidence “Carlson Environmental, a Nova Group, GBC Company, was originally founded in 1988 by Dr.” Source: RevenueBase Database · checked Sep 12, 2026
25	Actuate LAW	Partial evidence	Chicago, IL, United StatesHQ checked Sep 12, 2026	11-50	16 contacts →
	Partial evidence “Founded by a team of Big Law veterans, our firm blends the nimble entrepreneurialism of a boutique start-up with the wisdom and experience that comes from decades of deftly…” 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 83 environmental law firms based in Chicago, United States

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Environmental law firms based in Chicago, United States at a glance

As of Sep 12, 2026

55.0%Verified-email coverage

56.7%Mobile-number coverage

70.2Average contacts per company

11-50Median size (employees)

160.2%Largest-city concentration · Washington

Sep 12, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

Freshness & accuracy

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

Email last verified

Median 14.0d

2,6630–30

50131–60

1861–90

090–180

19180+

Company record updated

Median 72.0d

00–30

2,74531–60

2,33961–90

50990–180

232180+

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 Chicago, 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 Chicago 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, 3,201 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 Chicago, United States?

RevenueBase identified 83 environmental law firms headquartered in Chicago, 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?

Seyfarth Shaw LLP, headquartered in Chicago, 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 3,201 verified decision-maker contacts tracked across these 83 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.