Grant Thornton Luxembourg

What Grant Thornton Luxembourg does

Grant Thornton Luxembourg is a private professional services firm headquartered in Luxembourg City, founded in 1987 and employing 353 professionals including 26 partners. It operates as a member firm of Grant Thornton International Ltd, a global network spanning 150+ markets and 80,000+ professionals, and in November 2024 joined the Grant Thornton Advisors multinational platform backed by New Mountain Capital. The firm delivers six core service lines: Audit & Assurance (including statutory audits, IFRS, forensic audit, valuation, and GDPR-CARPA certification as a CNPD-accredited body), Tax & Accounting (corporate, personal, expatriate, transfer pricing, VAT, payroll, and HR consulting), Advisory (business risk, consulting, deal advisory, FAAS, ESG, governance, and whistleblowing), Financial Services (fund administration, registrar and transfer agency, AML compliance, regulatory reporting, and legal support for investment funds), Technology (information security services), and Internal Audit (including IT audit).

The firm serves 12 identified industry verticals with primary focus on Asset Management, Banking, Professionals of the Financial Sector (PFS), Real Estate & Construction, and Small & Medium Enterprises (SME). It maintains 16 wholly-owned subsidiary legal entities that segment its service delivery, including Grant Thornton Audit & Assurance S.A., Grant Thornton Tax & Accounting S.A., Grant Thornton Financial Services S.A., Grant Thornton Advisory S.A., Grant Thornton Technology S.A., and Grant Thornton Recovery & Reorganisation S.A., among others. Proprietary technology includes MySmartOffice, a digital platform targeting SMEs with accounting, tax calendar, and business management tools, and partnerships around LuxApps (HR/payroll) and Grabowsky (IAM/PAM for CSSF Circular 20/750 compliance). The firm holds ISO 27001 certification and is accredited by CNPD as a GDPR-CARPA certification body.

Revenue is generated through fee-based professional services engagements, with quote-based pricing dependent on scope, complexity, and engagement type. Distribution is primarily consultative via direct partner engagement with enterprise clients, supplemented by a self-serve digital channel (MySmartOffice) for SME clients. The firm is not publicly traded and does not disclose revenue.

Name

Grant Thornton Luxembourg

Legal name

Grant Thornton Luxembourg

Website

https://grantthornton.lu

Company type

Private

Operating status

Operating

Headcount range

251–500 employees

Short description

Grant Thornton Luxembourg is a private mid-market professional services firm providing audit, tax, advisory, fund administration, and information security services to asset managers, banks, PFS entities, real estate firms, and SMEs in Luxembourg.

Ownership category

akta.pro rank

Headquarters

HQ city

Luxembourg

HQ country

Luxembourg

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Technology or R&D, Marketing or Sales, Infrastructure

Revenue model

1. Audit & Assurance Services: Statutory audits, consolidated financial statements, agreed-upon procedures, forensic audits, supervisory auditor services, liquidation audits, assurance engagements, IFRS services, and valuation services
2. Tax & Accounting Services: Corporate tax compliance, personal tax, expatriate tax, cross-border tax, transfer pricing, VAT advisory, payroll services, HR consulting, corporate secretarial services, and transaction/reorganization services
3. Advisory Services: Business risk services, consulting, data protection and privacy, deal advisory, financial accounting and advisory services (FAAS), forensic accounting, governance risk and compliance, sustainability and ESG services, whistleblowing services
4. Financial Services: Alternative investment services, fund administration, registrar and transfer agency, fund setup and launch, AML compliance, regulatory reporting, legal support and corporate services for investment funds
5. Technology Services: Information security services including compliance and audit, incident handling, strategy and consulting, security awareness, testing and assurance, and risk management
6. Internal Audit Services: Internal audit and IT audit services for clients

Pricing tiers

Go-to-market motion1 record

Distribution channels2 records

Marketing channels6 records

Core offering

Grant Thornton Luxembourg is a professional services firm offering audit and assurance, tax and accounting, advisory, financial services (investment fund administration), technology (information security), and internal audit services to enterprises and SMEs in Luxembourg. The firm also operates MySmartOffice, a digital platform providing SME clients with accounting, tax calendar, and business management tools. The firm is ISO 27001 certified and CNPD-accredited as a GDPR-CARPA certification body.

Product overview

Grant Thornton Luxembourg operates as a professional services firm offering a comprehensive portfolio of services organized into six main practice areas: Audit & Assurance (including financial statement audits, GDPR-CARPA certification, forensic audit, and valuation), Advisory (covering business risk, consulting, data protection, deal advisory, ESG, and whistleblowing), Financial Services (investment fund services including fund administration, AML compliance, and regulatory reporting), Tax & Accounting (corporate tax, personal tax, payroll, transfer pricing, and VAT), Technology (information security services), and Internal Audit (including IT audit). MySmartOffice is the firm's digital platform targeting SMEs, providing online access to accounting and tax management tools.

Differentiator

Problem solved

Functional benefit

Brands

• MySmartOffice: Digital office management tool for SMEs providing digitalised HR processes, payroll-related data centralisation, and collaboration features.

Products and services

• Audit & Assurance Statutory audits, consolidated financial statement audits, agreed-upon procedures, GDPR-CARPA certification, forensic audits, supervisory auditor (Commissaire) services, liquidation audits, assurance engagements, IFRS services, and valuation services for Luxembourg enterprises and regulated entities.

Quantifiable outcome

• DPO of the Year 2025 awarded to Pasquale Esposito

Segments12 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Partnerships

Five partnerships are on record, tiered core and minor.

• Grant Thornton AdvisorscoreStrategic or Co-development Partner · 14 November 2024Grant Thornton Luxembourg completed deal to join the Grant Thornton Advisors multinational platform covering Europe, UAE, Channel Islands, Cayman Islands, New Zealand and Brazil, enabling broader service delivery and expertise sharing.
• Grant Thornton International LtdcoreStrategic or Co-development PartnerGrant Thornton Luxembourg is a member firm of Grant Thornton International Ltd network, comprising over 700 offices in more than 150 markets worldwide. Services are delivered by member firms with GTIL providing coordination and brand management.
• Luxembourg Football FederationminorGTM or Marketing PartnerGrant Thornton became official sponsor of the Luxembourg Football Federation, providing marketing visibility and community engagement.
• United Nations Global CompactminorStrategic or Co-development PartnerGrant Thornton Luxembourg joined the UN Global Compact initiative, committing to sustainable and responsible business practices.
• National Pact on Business and Human RightsminorStrategic or Co-development PartnerGrant Thornton Luxembourg became official signatory of the National Pact on Business and Human Rights, committing to human rights principles.

Scale indicators4 records

Recent moves7 records

Expansion highlights6 records

Direct peers

• KPMG Luxembourg: KPMG Luxembourg is one of the Big Four firms operating in Luxembourg, offering audit, tax, and advisory services to the same asset management, banking, and PFS clients that Grant Thornton Luxembourg serves. It is the most direct competitor for large regulated mandates.
• PwC Luxembourg: PwC Luxembourg provides audit, tax, and advisory services with a particularly strong fund administration and asset management practice. It directly competes with Grant Thornton Luxembourg for the same Luxembourg-domiciled fund and corporate clients.
• EY Luxembourg: EY Luxembourg offers audit, tax, transaction advisory, and consulting services with deep fund services expertise. It is one of the four dominant players against which Grant Thornton Luxembourg competes for mid-market and enterprise mandates.
• RSM Luxembourg: RSM Luxembourg is the local member of RSM International, offering audit, tax, and consulting services to mid-market businesses. It competes with Grant Thornton Luxembourg for the same mid-market and international corporate clients.
• Deloitte Luxembourg: Deloitte Luxembourg operates across audit, tax, consulting, and financial advisory, with significant fund administration capability. It competes head-to-head with Grant Thornton Luxembourg across all six practice areas in the Luxembourg market.
• Crowe Luxembourg: Crowe Luxembourg is part of the Crowe Global network and provides audit, tax, and advisory services in Luxembourg. It is comparable in network affiliation, scale, and client segment focus.
• BDO Luxembourg: BDO Luxembourg is a mid-tier audit, tax, and advisory firm in Luxembourg serving SMEs and mid-market enterprises. It is a closer peer in scale and SME focus than the Big Four, directly competing for the SME and mid-market segments Grant Thornton targets.
• Baker Tilly Luxembourg: Baker Tilly Luxembourg provides audit, accounting, tax, and advisory services to local and international clients. It competes with Grant Thornton Luxembourg in the SME, liberal professions, and mid-market segments.
• Mazars Luxembourg: Mazars Luxembourg is an international audit, tax, and advisory firm with a Luxembourg presence serving corporates, funds, and financial institutions. Comparable to Grant Thornton Luxembourg in its integrated mid-market positioning.
• PKF Luxembourg: PKF Luxembourg is part of the PKF International network and provides accounting, audit, tax, and advisory services. Comparable to Grant Thornton Luxembourg in size, network affiliation, and SME-to-mid-market focus.

Market position

Strengths5 records

Weaknesses4 records

Competitive moat5 records

Key risks5 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/grant-thornton-luxembourg

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Subsidiaries17 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Grant Thornton Luxembourg