Company lists · Data refreshed September 2026

Top 24 Big law firms based in Rockville, United States

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

Compiled by the RevenueBase Data Team Data refreshed Sep 23, 2026 36 companies tracked

RevenueBase identified 36 big law firms headquartered in Rockville, United States as of September 2026 and tracks 327 professional contacts across them, including 174 with verified work emails. Across the United States, New York is the largest hub for this category (1,216 companies); Rockville has 36.

This list covers big law firms headquartered in Rockville, 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 23, 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 23, 2026 86% judged on-target in blind review

36Companies

327Contacts tracked

174Verified emails

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The 24 largest big law firms based in Rockville, United States

Ranked by team size

Top 24 of 36 big law firms based in Rockville, United States, ranked by team size, largest first. Data refreshed Sep 23, 2026. RevenueBase Smart Search rates how each company's information relates to big 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	Stein Sperling	Indirect evidence	Rockville, MD, United StatesHQ checked Sep 23, 2026	51-200	121 contacts →
	Indirect evidence “Since 1978, our attorneys have offered guidance and counsel to meet the business and personal needs of thousands of clients.” Source: RevenueBase Database · checked Sep 23, 2026
2	Mccarthy Wilson LLP	Indirect evidence	Rockville, MD, United StatesHQ checked Sep 23, 2026	11-50	41 contacts →
	Indirect evidence “For more than 50 years, McCarthy Wilson LLP has distinguished itself as a premier litigation firm of accomplished trial attorneys, handling a wide array of state and federal civil…” Source: RevenueBase Database · checked Sep 23, 2026
3	Budow And Noble, P.C	Partial evidence	Rockville, MD, United StatesHQ checked Sep 23, 2026	11-50	21 contacts →
	Partial evidence “The law firm of Budow and Noble, P.C, is well recognized in Maryland and the District of Columbia as a leader in the field of civil litigation.” Source: RevenueBase Database · checked Sep 23, 2026
4	RLG LAW	Partial evidence	Rockville, MD, United StatesHQ checked Sep 23, 2026	11-50	10 contacts →
	Partial evidence “At RLG Law, we provide effective legal representation with integrity, professionalism and unparalleled commitment to the interests of our clients.” Source: RevenueBase Database · checked Sep 23, 2026
5	Ethridge Quinn Kemp Rowan & Hartinger	Indirect evidence	Rockville, MD, United StatesHQ checked Sep 23, 2026	11-50	10 contacts →
	Indirect evidence “Founded in 1987, Ethridge Quinn is a dedicated litigation powerhouse in the Maryland and Washington D.C.” Source: RevenueBase Database · checked Sep 23, 2026
6	Samek & Flynn, LLC	Indirect evidence	Rockville, MD, United StatesHQ checked Sep 23, 2026	1-10	9 contacts →
	Indirect evidence “We offer clients creative, competent, and compliant solutions to business and legal issues.” Source: RevenueBase Database · checked Sep 23, 2026
7	Grant, Riffkin & Strauss, P.C	Indirect evidence	Rockville, MD, United StatesHQ checked Sep 23, 2026	1-10	7 contacts →
	Indirect evidence “About Grant, Riffkin & Strauss, P.C.” Source: RevenueBase Database · checked Sep 23, 2026
8	Werther & Mills, LLC	Indirect evidence	Rockville, MD, United StatesHQ checked Sep 23, 2026	1-10	7 contacts →
	Indirect evidence “Werther & Mills, LLC is a construction contracts and litigation boutique with offices in Alexandria, Virginia; Rockville, Maryland; and Washington, DC.” Source: RevenueBase Database · checked Sep 23, 2026
9	Compass LAW Partners	Partial evidence	Rockville, MD, United StatesHQ checked Sep 23, 2026	1-10	5 contacts →
	Partial evidence “Compass Law Partners was founded in 2018 to help clients navigate their legal issues smartly, efficiently and with energy, passion, and dedication.” Source: RevenueBase Database · checked Sep 23, 2026
10	The Rezvani LAW Firm LLC	Indirect evidence	Rockville, MD, United StatesHQ checked Sep 23, 2026	1-10	5 contacts →
	Indirect evidence “We offer litigation, alternative dispute resolution and transactional services to clients throughout the country.” Source: RevenueBase Database · checked Sep 23, 2026
11	Mcgann Hughes Gratz	Indirect evidence	Rockville, MD, United StatesHQ checked Sep 23, 2026	11-50	4 contacts →
	Indirect evidence “Competent counsel on your side can make all the difference.” Source: RevenueBase Database · checked Sep 23, 2026
12	Futrovsky, Forster & Scherr, Chartered	Partial evidence	Rockville, MD, United StatesHQ checked Sep 23, 2026	1-10	4 contacts →
	Partial evidence “Futrovsky, Forster and Scherr, Chartered is an AV® Rated, full-service law practice that offers personalized, high quality, client-oriented legal service in the Washington DC…” Source: RevenueBase Database · checked Sep 23, 2026
13	Hoffman Employment Law, LLC	Partial evidence	Rockville, MD, United StatesHQ checked Sep 23, 2026	1-10	3 contacts →
	Partial evidence “Located outside of Washington, D.C, in Rockville, Maryland, Hoffman Employment Law, LLC provides experienced and dedicated legal representation to individuals and businesses with…” Source: RevenueBase Database · checked Sep 23, 2026
14	Apatoff Peters Ebersohl	Partial evidence	Rockville, MD, United StatesHQ checked Sep 23, 2026	11-50	3 contacts →
	Partial evidence “Apatoff \| Peters \| Ebersohl is a law firm with offices in Rockville, MD and Falls Church, VA serving local, national, and global businesses.” Source: RevenueBase Database · checked Sep 23, 2026
15	Saboura, Goldman & Colombo, P.C	Indirect evidence	Rockville, MD, United StatesHQ checked Sep 23, 2026	1-10	3 contacts →
	Indirect evidence “Saboura, Goldman & Colombo, P.C.(the “Firm”) is an AV™ rated litigation firm providing experienced representation to corporate, individual and insurance clients in all state and…” Source: RevenueBase Database · checked Sep 23, 2026
16	Momentum Lawyers	Indirect evidence	Rockville, MD, United StatesHQ checked Sep 23, 2026	1-10	2 contacts →
	Indirect evidence “Shouldn't your business be represented by a firm that understands business?” Source: RevenueBase Database · checked Sep 23, 2026
17	The Gibbs LAW Firm, LLC	Partial evidence	Rockville, MD, United StatesHQ checked Sep 23, 2026	1-10	2 contacts →
	Partial evidence “Full service law firm representing individuals and business clients throughout the State of Maryland and the District of Columbia.” Source: RevenueBase Database · checked Sep 23, 2026
18	Dema LAW	Partial evidence	Rockville, MD, United StatesHQ checked Sep 23, 2026	51-200	1 contacts →
	Partial evidence “Dema Law is a company based out of Rockville, Maryland, United States.” Source: RevenueBase Database · checked Sep 23, 2026
19	Vine LAW Firm, LLC	Partial evidence	Rockville, MD, United StatesHQ checked Sep 23, 2026	1-10	1 contacts →
	Partial evidence “Vine Law Firm, LLC located in Rockville Town Center, is built on the concept that a client's interests can best be advanced through experienced and aggressive, yet cost-effective…” Source: RevenueBase Database · checked Sep 23, 2026
20	TAH LAW	Partial evidence	Rockville, MD, United StatesHQ checked Sep 23, 2026	1-10	1 contacts →
	Partial evidence “A boutique law firm in Maryland offering quality legal services to individuals, small businesses, and other attorneys.” Source: RevenueBase Database · checked Sep 23, 2026
21	Barkley & Kennedy, Chartered	Indirect evidence	Rockville, MD, United StatesHQ checked Sep 23, 2026	1-10	1 contacts →
	Indirect evidence “We offer our experience as effective lawyers who have practiced in Montgomery & Frederick Counties in Maryland for over 30 years.” Source: RevenueBase Database · checked Sep 23, 2026
22	The DAY LAW Practice, LLC	Partial evidence	Rockville, MD, United StatesHQ checked Sep 23, 2026	1-10	1 contacts →
	Partial evidence “The Day Law Practice, LLC is a law practice company based out of 103 North Adams Street, Suite 203, Rockville, Maryland, United States.” Source: RevenueBase Database · checked Sep 23, 2026
23	Flood LAW	Partial evidence	Rockville, MD, United StatesHQ checked Sep 23, 2026	1-10	1 contacts →
	Partial evidence “Flood Law is a boutique labor and employment and business litigation firm serving management and employers.” Source: RevenueBase Database · checked Sep 23, 2026
24	LAW Offices Of Mckenzie And Tehrani	Indirect evidence	Rockville, MD, United StatesHQ checked Sep 23, 2026	1-10	1 contacts →
	Indirect evidence “Our mission is to use our vast experience and commitment to excellence to provide superior legal services to our clients.” Source: RevenueBase Database · checked Sep 23, 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: big 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 big law firms.
Partial evidence: Its own public description names part of big law firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name big 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 24 of 36 big law firms based in Rockville, United States

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Big law firms based in Rockville, United States at a glance

As of Sep 23, 2026

53.2%Verified-email coverage

9.1Average contacts per company

1-10Median size (employees)

Sep 23, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

Email recency for this list is measured across the whole United States list rather than for Rockville, so it is reported there. Company counts and contact totals on this page are exact for Rockville, over 36 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 big 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 Rockville, United States whose own description of what they do matches “big 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 big 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 big law firms, and records with no verified work email. Companies headquartered outside Rockville 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, 174 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 23, 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.

Big 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 big 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 big law firms are there based in Rockville, United States?

RevenueBase identified 36 big law firms headquartered in Rockville, 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?

Stein Sperling, headquartered in Rockville, tops this list with the largest team on record.

Which city in the United States has the most big law firms?

New York leads the United States with 1,216 headquartered companies, followed by Los Angeles (580) and Chicago (540). Rockville has 36.

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 174 verified decision-maker contacts tracked across these 36 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 23, 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.