Company lists · Data refreshed September 2026

Top 14 Big four accounting firms based in Luxembourg

RevenueBase identified 25 company matches for big four accounting firms associated with Luxembourg as of September 2026 and tracks 6,689 professional contacts across them, including 3,007 with verified work emails. Luxembourg is the largest hub.

This list covers company matches for big four accounting firms associated with Luxembourg, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 21, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Sep 21, 2026 How this list was built
25Companies
6,689Contacts tracked
3,007Verified emails
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The 14 largest big four accounting firms based in Luxembourg

Ranked by team size
Top 14 of 25 company matches for big four accounting firms based in Luxembourg, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 21, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchLuxembourgHQ recorded Sep 21, 20261,001-5,0003,413 contacts →

Exact match

“PwC Luxembourg is the largest professional services firm in Luxembourg with over 3,600 people employed from 90 different countries.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
2Exact matchLuxembourgHQ recorded Sep 21, 20261,001-5,0001,902 contacts →

Exact match

“KPMG is a global organization of independent professional services firms providing Audit, Tax and Advisory services.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
3Exact matchLuxembourgHQ recorded Sep 21, 2026501-1,000600 contacts →

Exact match

“BDO Luxembourg is one of the largest firms of accountants, auditors and consultants in Luxembourg.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
4Exact matchLuxembourgHQ recorded Sep 21, 2026201-500359 contacts →

Exact match

“Forvis Mazars Group SC is an independent member of Forvis Mazars Global, a leading professional services network.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
5Exact matchWindhof, LuxembourgHQ recorded Sep 21, 202651-200124 contacts →

Exact match

“Vous êtes chef d’entreprise, artisan, commerçant, professionnels libéral ou du secteur financier?”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
6Exact matchLuxembourgHQ recorded Sep 21, 202611-5040 contacts →

Exact match

“PKF Audit & Conseil est devenu un cabinet indépendant et un membre du réseau PKF International depuis 2018.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
7Exact matchLivange, LuxembourgHQ recorded Sep 21, 202611-5035 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
8Exact matchBelvaux, LuxembourgHQ recorded Sep 21, 202611-5021 contacts →

Exact match

“We enable clients operating in all sectors to create and manage growth by providing them timely, accurate and prudent advice on audit, accountancy, corporate and financial…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
9Exact matchLuxembourgHQ recorded Sep 21, 202611-5011 contacts →

Exact match

“B.A.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
10Exact matchRumelange, LuxembourgHQ recorded Sep 21, 202611-5011 contacts →

Exact match

“Implanté à Luxembourg, notre cabinet dispose d'un réseau et d'une expertise transfrontalière.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
11Exact matchLuxembourgHQ recorded Sep 21, 2026201-50010 contacts →

Exact match

“Mazars est un groupe international et intégré spécialisé dans l’audit, la fiscalité et le conseil ainsi que dans les services comptables et juridiques*.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
12Exact matchLuxembourgHQ recorded Sep 21, 202611-507 contacts →

Exact match

“Forte d’une expérience de plus de 30 ans dans le monde des affaires, IBS & Partners a acquis les compétences et connaissances en expertises comptable et fiscale et en…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
13Exact matchLuxembourgHQ recorded Sep 21, 20261-106 contacts →

Exact match

“Euraudit Consult est un cabinet d’Expertise-Comptable pour les entreprises et les indépendants à la recherche d’une expertise et de solutions de haute qualité.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
14Exact matchLuxembourgHQ recorded Sep 21, 202611-504 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase

Showing 14 of 25 big four accounting firms based in Luxembourg

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Big four accounting firms based in Luxembourg at a glance

As of Sep 21, 2026
45.0%Verified-email coverage
267.6Average contacts per company
11-50Median size (employees)
64.0%Largest-city concentration · Luxembourg
Sep 21, 2026Page data refreshed

Companies by employee count

1-10
5
11-50
13
51-200
2
201-500
2
501-1,000
1
1,001-5,000
2

Email recency for this list is measured worldwide rather than for Luxembourg, so it is reported there. Company counts and contact totals on this page are exact for Luxembourg, over 25 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies
Company records associated with Luxembourg whose business descriptions match “big four accounting firms” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 3,007 professional contacts with verified work emails across the full matched dataset. 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 21, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “big four accounting firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many big four accounting firms are there based in Luxembourg?

RevenueBase identified 25 company matches for big four accounting firms associated with Luxembourg as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

PWC Luxembourg tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most big four accounting firms?

Luxembourg leads with 16 company records, followed by Bertrange (2) and Belvaux (1).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 3,007 professional contacts with verified work emails tracked across these 25 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 21, 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 SmartSearch, 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.