Company lists · Data refreshed September 2026
Top 25 Eu lobbying firms based in the United States
RevenueBase identified 669 eu lobbying firms headquartered in the United States as of September 2026 and tracks 5,726 professional contacts across them, including 2,691 with verified work emails. Washington is the largest hub.
This list covers eu lobbying firms headquartered in the 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 20, 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.
The 25 largest eu lobbying firms based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 255 contacts → | ||||
Partial evidence “Cornerstone Government Affairs is a full-service, bipartisan, employee-owned firm specializing in government relations and lobbying, public affairs, strategic communications, and…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 2 | 243 contacts → | ||||
Partial evidence “The Services You Need BGR Group offers an integrated suite of bipartisan lobbying, strategic communications and advocacy solutions that help meet challenges in a risky…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 3 | 166 contacts → | ||||
Indirect evidence “Invariant is a bipartisan business advisory firm, providing strategic advice to companies, trade associations, non-profits, and individuals on how to make Washington work for them.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 4 | 166 contacts → | ||||
Indirect evidence “We are now FGS Global.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 5 | 97 contacts → | ||||
Indirect evidence “Monument Advocacy is a bipartisan firm that offers government relations, public affairs, strategic and crisis communications, and digital services.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 6 | 88 contacts → | ||||
Partial evidence “Kasirer is NYC's #1 lobbying firm, navigating government on behalf of private sector & nonprofit clients.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 7 | 79 contacts → | ||||
Indirect evidence “At Cassidy and Associates, we make Washington work for you.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 8 | 77 contacts → | ||||
Indirect evidence “Florio Perrucci Steinhardt Cappelli & Tipton LLC was founded on the belief that business objectives can only be achieved by combining strategic and aggressive legal advocacy with…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 9 | 69 contacts → | ||||
Indirect evidence “Established in 2010, Thorn Run Partners is a leading Washington, DC-based government affairs firm whose members are Capitol Hill veterans with over a century’s experience in…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 10 | 66 contacts → | ||||
Indirect evidence “Bose Public Affairs Group successfully advocates for our clients’ legislative, regulatory, procurement, political and communication interests with offices in Indianapolis and…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 11 | 63 contacts → | ||||
Indirect evidence “Capitol Counsel, LLC is a full service government relations firm providing political analysis, strategic advice and advocacy services.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 12 | 62 contacts → | ||||
Indirect evidence “Founded and led by Scott Levenson since 1990, TAG is a diverse team working together to deliver results.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 13 | 57 contacts → | ||||
Partial evidence “Nielsen Merksamer is one of the preeminent political and government law and lobbying firms in the country, serving a national clientele that includes leading businesses…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 14 | 55 contacts → | ||||
Indirect evidence “At Beekeeper Group we believe in empowering people to advocate for impact by connecting them with stakeholders that are ready to take action so that our clients can achieve their…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 15 | 53 contacts → | ||||
Indirect evidence “Smart strategy begins with being well informed.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 16 | 53 contacts → | ||||
Indirect evidence “Mindset is a bipartisan public policy firm that blends thoughtful research and analysis, strategic advisory services, and sophisticated advocacy to address the challenges and…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 17 | 52 contacts → | ||||
Indirect evidence “Lewis-Burke Associates LLC is a leading full service government relations firm specializing in advocating for the public policy interests of institutions of higher education and…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 18 | 52 contacts → | ||||
Indirect evidence “CGCN Group is an integrated advocacy and strategic communications firm that specializes in helping Fortune 500 companies, non-profits, and trade associations navigate complex…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 19 | 46 contacts → | ||||
Indirect evidence “Described by the New York Times as “a new breed of consultants,” the Parkside Group is a leading public affairs firm.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 20 | 44 contacts → | ||||
Indirect evidence “The Vogel Group is a Washington, D.C.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 21 | 44 contacts → | ||||
Partial evidence “HillCo Partners is a full-service public and government affairs consulting firm, providing services in the lobbying, public policy, communications and regulatory arenas.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 22 | 44 contacts → | ||||
Indirect evidence “Founded in January 1995 by Gregory Steve Proctor, President/CEO, G.S.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 23 | 43 contacts → | ||||
Partial evidence “The Livingston Group (TLG) has delivered comprehensive government relations and lobbying services in Washington DC and globally since With nine different practice areas, our…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 24 | 40 contacts → | ||||
Indirect evidence “S-3 is a full service policy and government relations firm providing comprehensive solutions in government affairs and public relations to top tier clients whose priorities demand…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 25 | 39 contacts → | ||||
Indirect evidence “The Alpine Group is a government affairs consulting firm located on Capitol Hill in Washington, D.C.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
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: eu lobbying 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 eu lobbying firms.
- Partial evidence
- Its own public description names part of eu lobbying firms, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name eu lobbying 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 669 eu lobbying firms based in the United States
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Eu lobbying firms based in the United States at a glance
As of Sep 20, 2026Companies by employee count
Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 669 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 eu lobbying 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 the United States whose own description of what they do matches “eu lobbying 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 eu lobbying 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 eu lobbying firms, and records with no verified work email. Companies headquartered outside United States 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, 2,691 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 20, 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.
Eu lobbying firms by metro
- Eu lobbying firms in Washington210
- Eu lobbying firms in Sacramento30
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 eu lobbying 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 eu lobbying firms are there based in the United States?
RevenueBase identified 669 eu lobbying firms headquartered in the 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?
Cornerstone Government Affairs, headquartered in Washington, tops this list with the largest team on record.
Which city has the most eu lobbying firms?
Washington leads with 210 headquartered companies, followed by Sacramento (30) and Austin (19).
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 2,691 verified decision-maker contacts tracked across these 669 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 20, 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.