Company lists · Data refreshed September 2026

Top 25 Energy and infrastructure law firms based in Chicago, United States

Name: Energy and infrastructure 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 28, 2026 93 companies tracked

RevenueBase identified 93 energy and infrastructure law firms headquartered in Chicago, United States as of September 2026 and tracks 15,905 professional contacts across them, including 9,428 with verified work emails. Across the United States, Houston is the largest hub for this category (193 companies); Chicago has 93.

This list covers energy and infrastructure 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 28, 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 28, 2026 86% judged on-target in blind review

93Companies

15,905Contacts tracked

9,428Verified emails

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The 25 largest energy and infrastructure law firms based in Chicago, United States

Ranked by team size

Top 25 of 93 energy and infrastructure law firms based in Chicago, United States, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to energy and infrastructure 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	Sidley Austin LLP	Partial evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	1,001-5,000	5,169 contacts →
	Partial evidence “Sidley is an elite global law firm.” Source: RevenueBase Database · checked Sep 28, 2026
2	Mayer Brown	Partial evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	1,001-5,000	4,177 contacts →
	Partial evidence “Mayer Brown is a leading international law firm, positioned to represent the world’s major corporations, funds and financial institutions in their most important and complex…” Source: RevenueBase Database · checked Sep 28, 2026
3	Seyfarth Shaw LLP	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	1,001-5,000	2,167 contacts →
	Indirect evidence “High stakes.” Source: RevenueBase Database · checked Sep 28, 2026
4	Hinshaw & Culbertson LLP	Partial evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	501-1,000	1,188 contacts →
	Partial evidence “Hinshaw & Culbertson LLP is a U.S-based law firm with offices nationwide.” Source: RevenueBase Database · checked Sep 28, 2026
5	Chapman And Cutler LLP	Partial evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	201-500	565 contacts →
	Partial evidence “Chapman is a law firm focused on finance.” Source: RevenueBase Database · checked Sep 28, 2026
6	Litchfield Cavo LLP	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	501-1,000	424 contacts →
	Indirect evidence “Litchfield Cavo LLP began as a small firm of attorneys experienced in insurance and business defense matters.” Source: RevenueBase Database · checked Sep 28, 2026
7	Neal, Gerber & Eisenberg LLP	Partial evidence	Chicago, IL, United StatesHQ checked Sep 28, 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 28, 2026
8	Levenfeld Pearlstein, LLC	Partial evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	51-200	254 contacts →
	Partial evidence “Formed in Levenfeld Pearlstein provides the sophisticated skills and resources of a big law firm with the personal attention of a small law firm.” Source: RevenueBase Database · checked Sep 28, 2026
9	KDM Engineering	Strong evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	51-200	114 contacts →
	Strong evidence “Founded upon a vision of challenging and changing the energy infrastructure to help light up the world, KDM specializes in engineering consulting and design, program and project…” Source: RevenueBase Database · checked Sep 28, 2026
10	Singh Associates, INC	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	51-200	110 contacts →
	Indirect evidence “For more than 30 years, SINGH + Associates has been meeting and exceeding our clients’ expectations for high quality planning, design and engineering services delivered with care…” Source: RevenueBase Database · checked Sep 28, 2026
11	Masuda Funai	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 28, 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 28, 2026
12	Hughes Socol Piers Resnick & Dym, LTD	Partial evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	51-200	76 contacts →
	Partial evidence “HSPRD is a full-service law firm built on strong client relationships and supported by smart, skilled attorneys.” Source: RevenueBase Database · checked Sep 28, 2026
13	Christensen HSU Sipes LLP	Partial evidence	Chicago, IL, United StatesHQ checked Sep 28, 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 28, 2026
14	Schain Banks	Strong evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	11-50	36 contacts →
	Strong evidence “Schain Banks is a Chicago-based law firm specializing in real estate, zoning, local government, energy, and litigation.” Source: RevenueBase Database · checked Sep 28, 2026
15	KMA Zuckert LLP	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	51-200	35 contacts →
	Indirect evidence “KMA Zuckert LLP brings together two firms with extensive experience in solving problems for clients across a broad range of disciplines: Kaplan, Massamillo & Andrews, with its…” Source: RevenueBase Database · checked Sep 28, 2026
16	Fletcher & Sippel LLC	Partial evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	11-50	35 contacts →
	Partial evidence “Fletcher & Sippel LLC is a 25+ attorney, 3 location law firm with home offices located in Chicago, Illinois, the rail hub of America.” Source: RevenueBase Database · checked Sep 28, 2026
17	Nisen & Elliott, LLC	Indirect evidence	Chicago, United StatesHQ checked Sep 28, 2026	11-50	35 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026
18	Shefsky & Froelich	Partial evidence	Chicago, IL, United StatesHQ checked Sep 28, 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 28, 2026
19	Litwin Kach LLP	Strong evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	11-50	31 contacts →
	Strong evidence “Litwin Kach is a boutique law firm providing sophisticated legal services in the areas of private equity, mergers and acquisitions, energy development, venture capital, commercial…” Source: RevenueBase Database · checked Sep 28, 2026
20	Mohan Groble Scolaro, P.C	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 28, 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 28, 2026
21	Hogan Marren Babbo & Rose, LTD	Partial evidence	Chicago, IL, United StatesHQ checked Sep 28, 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 28, 2026
22	Shepard Schwartz & Harris LLP	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	1-10	26 contacts →
	Indirect evidence “As of July 2022, Shepard Schwartz & Harris LLP joined Citrin Cooperman.” Source: RevenueBase Database · checked Sep 28, 2026
23	Elrod Friedman LLP	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 28, 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 28, 2026
24	Laurie & Brennan, LLP	Partial evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	11-50	19 contacts →
	Partial evidence “As one of the largest boutique construction law firms in Chicago, Laurie & Brennan has developed an unrivaled bench of industry experience and know-how to represent clients in…” Source: RevenueBase Database · checked Sep 28, 2026
25	Stein RAY LLP	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	11-50	17 contacts →
	Indirect evidence “Stein Ray LLP is a leading litigation and international arbitration boutique focusing on the resolution of large, high-stakes domestic and international construction disputes.” Source: RevenueBase Database · checked Sep 28, 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: energy and infrastructure 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 energy and infrastructure law firms.
Partial evidence: Its own public description names part of energy and infrastructure law firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name energy and infrastructure 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 93 energy and infrastructure law firms based in Chicago, United States

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Energy and infrastructure law firms based in Chicago, United States at a glance

As of Sep 28, 2026

59.3%Verified-email coverage

171.0Average contacts per company

11-50Median size (employees)

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

Email recency for this list is measured across the whole United States list rather than for Chicago, so it is reported there. Company counts and contact totals on this page are exact for Chicago, over 93 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 energy and infrastructure 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 “energy and infrastructure 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 energy and infrastructure 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 energy and infrastructure 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, 9,428 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 28, 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.

Energy and infrastructure law firms by metro in the United States

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 energy and infrastructure 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 energy and infrastructure law firms are there based in Chicago, United States?

RevenueBase identified 93 energy and infrastructure 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?

Sidley Austin LLP, headquartered in Chicago, tops this list with the largest team on record.

Which city in the United States has the most energy and infrastructure law firms?

Houston leads the United States with 193 headquartered companies, followed by New York (193) and Washington (125). Chicago has 93.

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 9,428 verified decision-maker contacts tracked across these 93 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 28, 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.