# Professional services firms headquartered in Luxembourg
Tamtam tracks 56 professional services firms headquartered in Luxembourg. This list ranks the 50 largest by number of employees on LinkedIn, led by Eurofins, Alter Domus and IQ-EQ. Their median headcount is 334. Half of them were founded in 2004 or later.
These professional services firms in Luxembourg are primarily large companies focused on financial services, legal practices, and IT consulting, with a significant presence of biotechnology research firms. Noteworthy examples include Alter Domus, which supports investment managers, IQ-EQ, providing global investor services, and PwC Luxembourg, offering audit, tax, and advisory services. Sword Group specializes in data insights and digital transformation, while Arendt & Medernach is a leading independent law firm.
The data shows a concentration of headquarters in Luxembourg City, with a few companies located in nearby towns such as Windhof, Howald, and Leudelange. Many of these firms, such as Alter Domus (2003), Sword Group (2000), and Netcompany-Intrasoft (1996), were founded around the turn of the millennium, indicating a period of growth in these sectors.
π±πΊ Luxembourg Β· 50 companies Β· Updated Nov 12, 2026
| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Eurofins](https://www.tamtam.ai/c/eurofins) (eurofins.com)
An international life sciences company offering analytical testing services in food, environmental, pharmaceutical, and cosmetic industries, ensuring safety and authenticity | Biotechnology Research | π±πΊ Luxembourg | 24,896 | |
| 2 | [Alter Domus](https://www.tamtam.ai/c/alter-domus) (alterdomus.com)
Providing end-to-end expertise and technology solutions to support investment managers and asset owners in managing alternative investments efficiently and effectively. | Financial Services | π±πΊ Luxembourg | 6,082 | 2003 |
| 3 | [IQ-EQ](https://www.tamtam.ai/c/iq-eq) (iqeq.com)
Providing global investor services with technical expertise and client understanding for fund managers, multinational companies, family offices, and private clients. | Financial Services | π±πΊ Luxembourg | 5,745 | 1896 |
| 4 | [PwC Luxembourg](https://www.tamtam.ai/c/pwc-luxembourg) (pwc.lu)
Largest professional services firm providing audit, tax, and advisory services, including management consulting, to diverse local and multinational clients in Luxembourg. | Financial Services | π±πΊ Luxembourg | 3,543 | |
| 5 | [Quintet Private Bank](https://www.tamtam.ai/c/quintet-private-bank) (quintet.lu)
Private bank serving wealthy individuals, families, and institutions across Europe, focusing on personalized wealth protection and growth strategies. | Banking | π±πΊ Luxembourg | 2,253 | |
| 6 | [Sword Group](https://www.tamtam.ai/c/sword-group) (sword-group.com)
Specialists in data insights, digital transformation, and technology services supporting complex IT and business projects across over 50 countries. | IT Services and IT Consulting | π±πΊ Windhof | 2,170 | 2000 |
| 7 | [KPMG Luxembourg](https://www.tamtam.ai/c/kpmg-luxembourg) (kpmg.com)
Independent firms providing audit, tax, and advisory services worldwide, operating under a global brand with distinct legal entities. | Financial Services | π±πΊ Luxembourg | 1,863 | |
| 8 | [Eurofins PSS Insourcing Solutions](https://www.tamtam.ai/c/eurofins-pss-insourcing-solutions) (eurofinspss.com)
Eurofins Professional Scientific Services redefines industry norms by providing insourcing solutions for scientific operations, HR practices, and operational excellence globally | Biotechnology Research | π±πΊ Luxembourg | 1,840 | |
| 9 | [Netcompany-Intrasoft](https://www.tamtam.ai/c/netcompany-intrasoft) (netcompany.com)
A leading European IT Solutions and Services Group, offering innovative solutions to international and national public and private organizations worldwide | IT Services and IT Consulting | π±πΊ Luxembourg | 1,687 | 1996 |
| 10 | [Arendt & Medernach](https://www.tamtam.ai/c/arendt-and-medernach) (arendt.com)
Leading independent law firm providing specialist legal, regulatory, taxation, and advisory services for international and domestic clients conducting business activities within Luxembourg. | Law Practice | π±πΊ Luxembourg | 889 | 1988 |
| 11 | [Dennemeyer](https://www.tamtam.ai/c/dennemeyer) (dennemeyer.com)
Provides comprehensive Intellectual Property protection, management, legal services, strategy consulting, software, maintenance, and patent analytics for diverse global clients. | Law Practice | π±πΊ Howald | 812 | 1962 |
| 12 | [BSP](https://www.tamtam.ai/c/bsp) (bsp.lu)
Independent, full-service law firm based in Luxembourg, providing tailored legal advice to domestic and international clients across various business law aspects. | Law Practice | π±πΊ Leudelange | 784 | 2012 |
| 13 | [Morgan Philips Group](https://www.tamtam.ai/c/morgan-philips-group) (fr.morganphilips.com)
Providing innovative global talent solutions including executive search, recruitment, talent consulting, outplacement, and interim management services worldwide. | Staffing and Recruiting | π±πΊ Luxembourg | 774 | 2013 |
| 14 | [Eurofins Consumer Product Testing](https://www.tamtam.ai/c/eurofins-consumer-product-testing) (eurofins.com)
Specializing in non-food consumer product testing, the company offers tailored quality assurance solutions, from supplier assessment to compliance, including testing, inspections, and regulatory guidance globally | International Trade and Development | π±πΊ Luxembourg | 734 | 1987 |
| 15 | [Zeentech](https://www.tamtam.ai/c/zeentech) (zeentech.com.br)
Specialists in engineering systems, simulations, testing, and high-tech solutions for automotive, railway, aerospace, and agricultural industries, providing innovative business solutions with certified quality management | Business Consulting and Services | π±πΊ Luxemburgo - LU | 698 | |
| 16 | [BDO Luxembourg](https://www.tamtam.ai/c/bdo-luxembourg) (bdo.lu)
Provides audit, tax consultancy, accounting, payroll, financial engineering, investment fund services, advisory, human resources, and IT solutions to diverse business sectors. | Accounting | π±πΊ Luxembourg | 645 | 1977 |
| 17 | [SOA PEOPLE](https://www.tamtam.ai/c/soa-people) (soapeople.com)
Specializes in SAP consulting and services, supporting business transformation with proven methodologies and strong partnerships across various industries. | IT Services and IT Consulting | π±πΊ Bertrange | 613 | 2007 |
| 18 | [Elvinger Hoss Prussen](https://www.tamtam.ai/c/elvinger-hoss-prussen) (elvingerhoss.lu)
A Luxembourg-based legal firm founded in 1964, providing exceptional legal advice to businesses, institutions, and entrepreneurs with a focus on excellence and creativity | Legal Services | π±πΊ Luxembourg | 534 | 1964 |
| 19 | [ATOZ Services](https://www.tamtam.ai/c/atoz-services) (atoz-services.lu)
Provides comprehensive corporate and management services, including tax compliance, fund services, and regulatory support, for Luxembourg-based businesses. | Financial Services | π±πΊ Senningerberg | 407 | 2018 |
| 20 | [Centralis Group](https://www.tamtam.ai/c/centralis-group) (centralisgroup.com)
Provider of alternative investments and corporate services worldwide, specializing in tailor-made solutions for multinational organizations, private equity, real estate, and individuals | Professional Services | π±πΊ Luxembourg | 400 | 2006 |
| 21 | [ATOZ Tax Advisers](https://www.tamtam.ai/c/atoz-tax-advisers) (atoz.lu)
High-end advisory firm specializing in tax, corporate implementation, and finance solutions for international organizations, with a focus on optimizing investment value | Financial Services | π±πΊ Senningerberg | 397 | 2004 |
| 22 | [Forvis Mazars in Luxembourg](https://www.tamtam.ai/c/forvis-mazars-in-luxembourg) (forvismazars.com)
International partnership providing audit, tax, advisory, accounting, and legal services with over 50,000 professionals supporting clients worldwide. | Financial Services | π±πΊ Luxembourg | 367 | |
| 23 | [AMPLEXOR International](https://www.tamtam.ai/c/amplexor-international) (acolad.com)
Providing digital solutions for compliance, content management, consulting, and integration across multiple industries to improve efficiency and revenue. | IT Services and IT Consulting | π±πΊ Bertrange | 354 | |
| 24 | [Schroeder & AssociΓ©s S.A.](https://www.tamtam.ai/c/schroeder-and-associes-s-a) (schroeder.lu)
With over 50 years of experience, our company provides construction engineering services, collaborating with architects and engineers to meet customers' needs efficiently | Civil Engineering | π±πΊ Kockelscheuer | 343 | 1961 |
| 25 | [Grant Thornton Luxembourg](https://www.tamtam.ai/c/grant-thornton-luxembourg) (grantthornton.lu)
Provider of Audit, Business Advisory, Tax, Financial Services, and Technology solutions in Luxembourg, serving various entities with global expertise and local market understanding | Financial Services | π±πΊ Luxembourg | 334 | 1987 |
| 26 | [InTech](https://www.tamtam.ai/c/intech-kayl) (intech.lu)
InTech is an IT service company specializing in consulting, custom solution development, digital transformation, and innovative projects across various industries | Software Development | π±πΊ Kayl | 334 | 1995 |
| 27 | [Eurofins Softlines & Hardlines](https://www.tamtam.ai/c/eurofins-softlines-and-hardlines) (eurofins.com)
Global provider of testing, inspections, audits, certification, and sustainability services for consumer products Specializes in softlines, leather goods, footwear, toys, and hard goods | International Trade and Development | π±πΊ Luxembourg | 333 | |
| 28 | [Arendt Investor Services](https://www.tamtam.ai/c/arendt-investor-services) (arendt.com)
Arendt - Investor Services offers integrated fund and corporate services, governance, compliance, and tax services supervised by CSSF | Financial Services | π±πΊ Luxembourg | 332 | 2009 |
| 29 | [Skelia](https://www.tamtam.ai/c/skelia) (skelia.com)
An international leader in building cross-border IT and engineering teams, offering services through a network of service centers in multiple countries | IT Services and IT Consulting | π±πΊ Grand Duchy of Luxembourg | 299 | 2008 |
| 30 | [Astorg](https://www.tamtam.ai/c/astorg) (astorg.com)
Global private equity firm managing β¬21 billion in assets with offices in major financial hubs Investment team includes 70 professionals | Financial Services | π±πΊ Luxembourg | 258 | 1998 |
| 31 | [FundRock](https://www.tamtam.ai/c/fundrock) (fundrock.com)
Provides independent UCITS Management Company and AIFM services, offering risk management, oversight, and compliance, integrating with client investment decision-making processes, globally. | Financial Services | π±πΊ Hesperange | 232 | |
| 32 | [LSC360](https://www.tamtam.ai/c/lsc360) (lsc360.lu)
LSC Engineering Group is a collection of companies combining expertise in construction and urban development It has become a leader in Luxembourg and expanded internationally | Engineering Services | π±πΊ Contern | 215 | 2013 |
| 33 | [Luxcontrol](https://www.tamtam.ai/c/luxcontrol) (luxcontrol.com)
Luxcontrol offers safety, health, environmental, and product quality services to help clients comply with regulations They aim to build a safer world with a team of 250 experts | Construction | π±πΊ Belvaux | 210 | 1978 |
| 34 | [AVEGA Luxembourg](https://www.tamtam.ai/c/avega-luxembourg) (avega.lu)
Provides tailored corporate, fund administration, and tax compliance services for businesses and investment vehicles, leveraging local expertise and international presence. | Accounting | π±πΊ Luxemburg | 184 | 2006 |
| 35 | [Apex Group (Luxembourg)](https://www.tamtam.ai/c/apex-group-luxembourg) (apexgroup.com)
Global financial services provider offering a wide range of services to asset managers, capital markets, private clients, and family offices worldwide | Financial Services | π±πΊ Luxembourg | 168 | 2003 |
| 36 | [HACA Partners](https://www.tamtam.ai/c/haca-partners) (hacapartners.lu)
HACA Partners specializes in providing tailored governance models, internal and external audits, regulatory compliance, risk management, and consulting services for businesses | Financial Services | π±πΊ Luxembourg | 130 | 2016 |
| 37 | [SustainCERT](https://www.tamtam.ai/c/sustaincert) (sustain-cert.com)
Provides independent validation and verification services for carbon markets and value chains, aligning with international sustainability frameworks. | Environmental Services | π±πΊ Livange | 67 | 2018 |
| 38 | [Opportunity Financial Services](https://www.tamtam.ai/c/opportunity-financial-services) (opportunityfs.com)
A pioneer in integrated financial solutions for startups and corporate clients, specializing in company incorporation, accounting, tax compliance, and fund administration Dedicated to outstanding customer service | Financial Services | π±πΊ Luxembourg | 48 | 2003 |
| 39 | [Chemservice Group](https://www.tamtam.ai/c/chemservice-group) (chemservice-group.com)
A global consultancy providing expert advice on national and international chemical regulations, offering scientific, technical, and strategic solutions for clients worldwide | Chemical Manufacturing | π±πΊ Mertert | 44 | 2007 |
| 40 | [Genève Invest Group](https://www.tamtam.ai/c/geneve-invest-group) (geneveinvest.com)
Trustworthy wealth management empowering individuals to invest successfully for a financially secure future. Active asset management and fixed income securities. | Financial Services | π±πΊ Luxembourg | 34 | 2002 |
| 41 | [COMMISSAIRE AUX COMPTES S.A.](https://www.tamtam.ai/c/commissaire-aux-comptes-s-a)
The company provides a range of financial services in Luxembourg, including auditing, liquidation, administrative management, tax advice, and business consulting | Business Consulting and Services | π±πΊ Esch-sur-Alzette | 22 | 2007 |
| 42 | [Nordlux VermΓΆgensmanagement S.A.](https://www.tamtam.ai/c/nordlux-vermogensmanagement-s-a)
A privately owned company in Luxembourg specializing in investment advisory, portfolio and fund management, asset management, and insurance brokerage for affluent individuals | Financial Services | π±πΊ Contern | 21 | 2015 |
| 43 | [Fiduciaire GΓ©nΓ©rale de Luxembourg](https://www.tamtam.ai/c/fiduciaire-generale-de-luxembourg) (fgl.lu)
A respected player in auditing, taxation, and management consultancy services, with expertise spanning 60 years, serving local, cross-border, and international clients | Accounting | π±πΊ Luxembourg | 19 | 1950 |
| 44 | [FRONT Consulting](https://www.tamtam.ai/c/front-consulting) (front-consulting.com)
Asset management consultants specializing in transformation projects, offering services from advisory to deployment in areas such as data management, reporting, compliance, and risk management | Business Consulting and Services | π±πΊ Strassen | 18 | 2005 |
| 45 | [Circumference FS Luxembourg](https://www.tamtam.ai/c/circumference-fs-luxembourg) (circumferencefs.com)
The company provides expertise in international financial services jurisdiction, assisting business entities with legal, accounting, and local knowledge for maximizing benefits | Financial Services | π±πΊ Luxemburg | 17 | |
| 46 | [Ziffer Group](https://www.tamtam.ai/c/ziffer-group) (ziffer.lu)
Ziffer offers corporate administration and family office services in Luxembourg, focusing on wealth preservation with a team of global professionals | Financial Services | π±πΊ Luxembourg city | 16 | 2010 |
| 47 | [Klarphos](https://www.tamtam.ai/c/klarphos) (klarphos.com)
Luxembourg-based asset manager offering customized portfolio solutions and advisory services for institutional clients focused on alternative investments, asset allocation, and ALM optimization | Financial Services | π±πΊ Luxembourg | 15 | |
| 48 | [BIL Manage Invest - now Waystone](https://www.tamtam.ai/c/bil-manage-invest-now-waystone) (waystone.com)
Provides third-party AIFM and management company solutions for UCITS and Alternative Investment Funds domiciled in Luxembourg, backed by BIL Group. | Financial Services | π±πΊ Luxembourg | 12 | 2013 |
| 49 | [Label R.](https://www.tamtam.ai/c/label-r) (label-r.com)
Label R provides ESG and ethical certification, due diligence, and second party opinions for fund managers, private equity funds, and sustainable bonds | Business Consulting and Services | π±πΊ Luxembourg | 11 | 2017 |
| 50 | [TriFinance Luxembourg](https://www.tamtam.ai/c/trifinance-luxembourg) (trifinance.com)
TriFinance is an international growth company offering finance and control services, focusing on hands-on advice, implementation support, and personalized career development | Financial Services | π±πΊ Luxembourg | 10 | |
## How this list is built
Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Nov 12, 2026.
## More company lists in Luxembourg
- [The largest companies in Luxembourg](https://www.tamtam.ai/l/largest-companies-luxembourg) (799)
- [Multinational companies in Luxembourg](https://www.tamtam.ai/l/multinational-companies-luxembourg) (340)
- [Financial services firms in Luxembourg](https://www.tamtam.ai/l/financial-services-firms-luxembourg) (255)
- [Financial Services companies in Luxembourg](https://www.tamtam.ai/l/financial-services-companies-luxembourg) (171)
- [Critical infrastructure operators in Luxembourg](https://www.tamtam.ai/l/critical-infrastructure-operators-luxembourg) (79)
- [Investment Management companies in Luxembourg](https://www.tamtam.ai/l/investment-management-companies-luxembourg) (75)
- [Venture capital and private equity firms in Luxembourg](https://www.tamtam.ai/l/vc-and-private-equity-firms-luxembourg) (71)
- [Manufacturers in Luxembourg](https://www.tamtam.ai/l/manufacturers-luxembourg) (59)
- [Companies with in-house R&D in Luxembourg](https://www.tamtam.ai/l/r-and-d-companies-luxembourg) (55)
- [IT Services and IT Consulting companies in Luxembourg](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-luxembourg) (42)
- [SaaS companies in Luxembourg](https://www.tamtam.ai/l/saas-companies-luxembourg) (41)
- [Corporate groups and holding companies in Luxembourg](https://www.tamtam.ai/l/holding-companies-luxembourg) (39)
- [Consulting firms in Luxembourg](https://www.tamtam.ai/l/consulting-firms-luxembourg) (37)
- [Retail chains in Luxembourg](https://www.tamtam.ai/l/retail-chains-luxembourg) (37)
- [IT services companies in Luxembourg](https://www.tamtam.ai/l/it-services-companies-luxembourg) (37)
- [Software Development companies in Luxembourg](https://www.tamtam.ai/l/software-development-companies-luxembourg) (36)
- [Banking companies in Luxembourg](https://www.tamtam.ai/l/banking-companies-luxembourg) (34)
- [Public sector organisations in Luxembourg](https://www.tamtam.ai/l/public-sector-organisations-luxembourg) (34)
- [Family-owned companies in Luxembourg](https://www.tamtam.ai/l/family-owned-companies-luxembourg) (32)
- [Logistics companies in Luxembourg](https://www.tamtam.ai/l/logistics-companies-luxembourg) (31)
- [Construction companies in Luxembourg](https://www.tamtam.ai/l/construction-companies-luxembourg) (30)
- [Transportation, Logistics, Supply Chain and Storage companies in Luxembourg](https://www.tamtam.ai/l/transportation-logistics-supply-chain-and-storage-companies-luxembourg) (30)
- [Insurance companies in Luxembourg](https://www.tamtam.ai/l/insurance-companies-luxembourg) (29)
- [Hardware manufacturers in Luxembourg](https://www.tamtam.ai/l/hardware-companies-luxembourg) (28)
## The same list elsewhere
- [Professional services firms in the world](https://www.tamtam.ai/l/professional-services-firms-in-the-world) (24,737)
- [Professional services firms in Europe](https://www.tamtam.ai/l/professional-services-firms-in-europe) (13,698)
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Source: https://www.tamtam.ai/l/professional-services-firms-luxembourg