Luxembourg's corporate legislative regime has entered a significant revision cycle. Amendments to the grand duchy's commercial company law took effect in early 2025. International businesses with existing Luxembourg structures – and those evaluating new ones – face concrete compliance obligations. Companies that do not act before the applicable deadlines risk invalidating resolutions, exposing directors to personal liability, and triggering regulatory scrutiny from the Commission de Surveillance du Secteur Financier (CSSF, the Luxembourg financial supervisory authority).
Luxembourg's 2025 corporate law reforms introduced targeted changes to company registration procedures, governance documentation, and shareholder resolution requirements under Luxembourg's commercial company legislation. The reforms affect a broad range of entities – including holding companies, investment vehicles, and operating subsidiaries incorporated in Luxembourg. Companies must review and, where necessary, update their articles of association and internal governance records before the compliance deadline set for mid-2025.
This alert identifies the categories of business most directly affected, sets out the threshold criteria that trigger compliance obligations, and lists five immediate actions that international companies should take now.
What changed – the reforms and their effective date
Luxembourg's commercial company legislation was amended by a legislative act published in the Mémorial (the official gazette of Luxembourg) in late 2024. The reforms entered into force on 1 January 2025. A transitional period runs until 30 June 2025 for existing companies to bring their constitutional documents into conformity.
The principal changes fall into four areas.
Company registration and registered office requirements. The rules governing a company's registered office have been tightened. A company's registered office must now correspond to an address where key governance activity genuinely takes place or where the company's administrative records are accessible. Pure letter-box arrangements that lack operational substance face heightened scrutiny. The Tribunal d'arrondissement (Luxembourg district court) retains jurisdiction to order rectification where registered office requirements are not met.
Articles of association and mandatory clauses. Luxembourg's commercial company legislation now requires articles of association to include explicit provisions on certain governance matters that were previously left to company practice. These include defined procedures for convening a board of directors meeting, minimum quorum thresholds for shareholder resolutions, and disclosure obligations relating to conflicts of interest at board level. Existing articles that are silent on these points must be amended by notarial deed – an acte notarié (notarised deed under Luxembourg law) – before the transitional period expires.
Shareholder resolution formalities. The threshold criteria for passing shareholder resolutions have been clarified. For certain categories of decision – including capital restructuring and amendment of the articles – the reform codifies majority requirements that previously rested on inconsistent practice. Written shareholder resolutions, frequently used by holding companies to avoid convening physical meetings, must now comply with updated signature and notification procedures.
Digitisation of company records. Luxembourg has accelerated the digitisation of its Registre de Commerce et des Sociétés (RCS, the Luxembourg commercial register). Filing obligations that were previously paper-based are now mandatory electronic submissions. Companies that fail to meet electronic filing deadlines face administrative penalties and potential suspension of their RCS registration.
For international businesses, the reforms also interact with Luxembourg's broader investment vehicle legislation. SOPARFI (société de participations financières – Luxembourg's standard holding and finance company structure) and SICAR (société d'investissement en capital à risque – Luxembourg's risk capital investment vehicle) are both within scope. The CSSF has signalled that it will use its supervisory powers to enforce governance compliance in regulated structures with effect from 1 July 2025.
Companies involved in Luxembourg-based M&A transactions should also note that the reforms affect due diligence requirements. Acquirers and their advisers will examine whether target companies have updated their constitutional documents. Failure to comply will constitute a disclosure item – and potentially a condition precedent to closing. For further detail on how these changes affect transaction structuring, see our analysis of mergers and acquisitions in Luxembourg.
To receive an expert assessment of your Luxembourg corporate structure's compliance position, contact us at info@ferrazwhitmore.com.
Who is affected and what to do now
The reforms apply to all commercial companies incorporated under Luxembourg law. The following categories face the most immediate compliance exposure.
Holding companies and SOPARFI structures. Luxembourg is host to a large number of international holding companies structured as SOPARFIs. These entities often have articles drafted years ago, before the current governance standards were codified. Many will require amendment. Companies whose articles do not address the newly mandatory governance clauses must pass a shareholder resolution authorising the amendment and execute an updated notarial deed.
Investment vehicles supervised by the CSSF. SICARs and other CSSF-regulated vehicles must comply by the earlier of the CSSF's supervisory deadline or the statutory transitional period. The CSSF has indicated that governance deficiencies identified during routine examinations after 1 July 2025 will be treated as regulatory breaches, not merely administrative oversights.
Subsidiaries of multinational groups. Group treasury companies, intermediate holding entities, and special-purpose vehicles incorporated in Luxembourg are all within scope. Parent companies that use Luxembourg subsidiaries as conduit or financing entities should instruct local counsel to audit each entity's articles and board records.
Companies in active transactions. Any company that is currently a party to an acquisition, merger, or financing transaction must treat the reform compliance review as an urgent pre-closing item. The Cour de cassation (Luxembourg's highest court) has consistently held that governance defects at the corporate entity level can affect the validity of resolutions passed in connection with transactions.
Five immediate actions are required for international companies with Luxembourg entities.
- Conduct a document audit: retrieve current articles of association and board of directors minutes for each Luxembourg entity and compare them against the newly mandatory governance clauses.
- Identify gaps: map every provision that the reformed legislation now requires and that your current articles do not address – including quorum rules, conflict of interest disclosure, and registered office substance.
- Pass a compliant shareholder resolution: convene or circulate a written shareholder resolution authorising the articles amendment before the 30 June 2025 deadline. Ensure the resolution meets the updated signature and notification requirements.
- Execute an updated notarial deed: instruct a Luxembourg notary to draft and execute an acte notarié reflecting the amended articles. File the updated articles with the RCS electronically within the prescribed period.
- Update RCS filings: confirm that all RCS filings – including registered office address, director appointments, and capital structure – are current and compliant with the new electronic submission rules.
Companies that operate across multiple jurisdictions should also consider how Luxembourg's reforms interact with their group governance policies. For a broader view of corporate compliance obligations across the Iberian and European context, our parallel alert on corporate reforms in Portugal addresses comparable legislative developments. For a full overview of our corporate advisory services in the grand duchy, visit our page on corporate law in Luxembourg.
About Ferraz & Whitmore
Ferraz & Whitmore is an international law firm based in Lisbon, advising business clients across 46 jurisdictions. Our corporate law practice covers company registration, governance restructuring, articles of association amendments, and regulatory compliance across both civil law and common law systems. We regularly advise international groups on Luxembourg corporate structures – including SOPARFI and SICAR vehicles – and on the governance implications of legislative change for holding companies and investment entities. Our team combines Portuguese civil law expertise with English common law tradition, giving clients a dual-tradition perspective that is particularly valuable when managing multi-jurisdictional corporate portfolios. The firm's corporate practice includes practitioners with experience before the CSSF and in proceedings before the Tribunal d'arrondissement. Engaging a lawyer in Luxembourg with cross-border experience – and a firm that understands both the local regulatory environment and the international context – is critical when reform cycles compress compliance timelines. As an international law firm advising on Luxembourg matters, Ferraz & Whitmore provides pragmatic, results-oriented counsel to entrepreneurs, institutional investors, and in-house legal teams. To discuss the impact of Luxembourg's 2025 corporate reforms on your structure, contact us at info@ferrazwhitmore.com.
Disclaimer: This publication is provided for informational purposes only and does not constitute legal advice. The information herein should not be relied upon as a substitute for professional legal counsel tailored to your specific circumstances. Ferraz & Whitmore assumes no liability for actions taken or not taken based on the contents of this material. For advice regarding your particular situation, please contact info@ferrazwhitmore.com.