The new Luxembourg fund law enters into force on 16 April 2026. Most managers have noted the date. Fewer have read what it actually requires by then.
AIFMD II, the EU directive that updates the 2011 framework for alternative investment fund managers, applies from 16 April 2026. Luxembourg transposed it through the Law of 3 March 2026, published in the Memorial A on 9 March. The CSSF followed on 18 March with a communication to the fund industry setting out operational requirements and announcing the launch of a dedicated eDesk filing procedure. The deadline is clear. What is less clear, for a number of managers, is what it actually requires them to do by that date.
A misreading has circulated across the industry. Because the enhanced Annex IV reporting templates under Article 24 are not due until 16 April 2027, the thinking goes, the operational burden can wait. That reasoning is wrong, and acting on it will create compliance gaps that cannot be corrected retrospectively.
What applies in April 2026, and what does not
The deferred element is narrow and specific: the technical standards setting out the new XML-format reporting templates for supervisory reporting under Annex IV. ESMA is required to deliver those standards by April 2027, and the Commission will formally adopt them thereafter. In the meantime, managers continue to file under the existing template.
Everything else is live from 16 April 2026. That includes the obligation for AIFMs managing open-ended AIFs to select at least two liquidity management tools (LMTs) from the harmonised list introduced by the directive. It includes the requirement to document detailed policies and procedures governing the activation and deactivation of those tools. It includes the obligation to communicate that selection to the CSSF through the new eDesk procedure, which opened on 23 March 2026, before 16 April. And it includes the obligation to reflect the selected tools in fund rules, instruments of incorporation, and investor disclosures.
The CSSF has been direct about the timeline. Its 18 March communication states that LMT selections must be submitted by 16 April 2026. The eDesk module for LMT selection opened five days later, on 23 March. A second module, for activation and deactivation notifications, goes live on 16 April itself. Managers who have not completed their fund-by-fund analysis, updated documentation, and submitted their filings by that date will not be in compliance on day one of the new regime.
The reporting paradox
The source of the confusion is a layering of deadlines that, read superficially, suggests a more gradual transition than the directive actually provides. AIFMD II is structured at two levels. Level 1, the directive text itself, establishes the substantive obligations and applies from the national transposition date. Level 2, the technical standards and implementing acts, elaborates how those obligations are reported and formatted, and arrives later.
The mistake is to read the deferral of Level 2 reporting standards as a deferral of the underlying Level 1 obligations. It is not. From 16 April 2026, an AIFM managing open-ended funds is legally required to have selected its LMTs, documented its policies, and notified its regulator. The fact that the format for annual supervisory reporting has not yet been finalised does not affect those requirements.
There is also a practical consequence that extends into 2027. The enhanced Annex IV report that managers will eventually file will cover the period from April 2026 onwards. It will require granular data on delegated portfolio management, including names, domiciles and regulatory status of delegates, dates and outcomes of due diligence reviews, and the share of assets under each delegation arrangement. Managers whose data governance is not capturing these metrics from April 2026 will face a gap in their 2027 filing that cannot be filled after the fact.
What the directive changes substantively
Beyond the LMT framework, AIFMD II introduces a dedicated regulatory regime for loan-originating AIFs. A fund whose principal strategy is to originate loans, or where originated loans represent at least 50% of net asset value, must comply with new rules on leverage limits, borrower diversification, and risk retention. The directive prohibits originate-to-distribute strategies by requiring the AIF to retain an economic interest of at least 5% of the notional value of any loan it originates. For private credit funds, which have grown significantly in Luxembourg over the past five years, these rules are material.
The directive also expands the scope of permitted ancillary activities for AIFMs and UCITS management companies, allowing them to add reception and transmission of orders, benchmark administration, and credit servicing to their licensed activities. For management companies seeking to consolidate service offerings within a single regulated entity, this is a genuine structural opportunity.
Governance requirements are tightened, with enhanced obligations on the composition of management bodies, the appointment and responsibilities of conducting officers, and the monitoring of delegation arrangements. Luxembourg has implemented these without gold-plating, transposing the directive text as written. The CSSF’s existing administrative practice on substance requirements, which already required real local presence and decision-making capacity, means that most Luxembourg-domiciled AIFMs will not need to restructure. Documentation and governance reviews are nonetheless necessary.
The UCITS dimension
AIFMD II does not stand alone. Directive 2024/927 amended both the AIFMD and the UCITS Directive simultaneously, and the Luxembourg transposition law covers both. UCITS management companies managing open-ended UCITS are subject to the same LMT selection and notification requirements as AIFMs. The CSSF communication of 18 March applies to UCITS and their management companies on identical terms.
UCITS VI also introduces a formal supervisory reporting regime for management companies for the first time. The new regime mirrors the logic of AIFMD Annex IV: periodic granular reporting on traded instruments, markets, exposures, and liquidity stress test results. The reporting templates follow the same April 2027 timeline as AIFMD II, but the obligation to capture and structure the underlying data begins in April 2026.
Luxembourg oversees more than 7.4 trillion euros in fund assets, with UCITS representing the largest share. The combined scope of AIFMD II and UCITS VI means that the 16 April deadline concerns the vast majority of fund managers and management companies operating on the Luxembourg platform.
A date, and what it means for compliance teams
The immediate workstream for managers is operational. Each open-ended fund in scope requires a fund-by-fund LMT analysis: which tools from the statutory list are appropriate given the investment strategy, liquidity profile, and redemption policy? The selection cannot consist solely of swing pricing and dual pricing. At least two tools must be selected, at least one of which must be quantitative and at least one qualitative.
Once selected, the tools must be reflected in the fund’s constitutional documents and prospectus or investor disclosures. Internal policies and procedures covering activation, deactivation, investor notification, and the operational arrangements for each tool must be finalised. Only then can the CSSF eDesk filing be completed.
For many managers, this is not a new intellectual problem. The market disruptions of recent years have already forced a practical engagement with liquidity risk. Side pockets, suspension mechanisms, and redemption gates are familiar instruments. What AIFMD II adds is a formal, harmonised framework with defined selection criteria, mandatory documentation, and regulatory notification requirements. The work is organisational as much as conceptual.
Firms like We Put You in Touch exist precisely because regulatory expertise does not centralise as easily as institutional mandates do. Each fund’s liquidity profile and redemption structure requires individual assessment, and the documentation required by 16 April cannot be templated at scale without that assessment having been done.
The 2027 reporting date is real. So is the 2026 compliance date. They are two parts of the same obligation, not an either/or. Managers who have structured their planning around the 2027 template deferral have taken a shortcut that the regulation does not actually offer.
References
- Ashurst – Luxembourg Law of 3 March 2026 transposing Directive (EU) 2024/927 (AIFMD II and UCITS VI), published Memorial A, 9 March 2026 (summary and analysis)
- CSSF – Communication to the investment fund industry on liquidity management tool requirements under AIFMD II/UCITS VI (18 March 2026)
- Directive (EU) 2024/927 of the European Parliament and of the Council of 13 March 2024 amending Directives 2011/61/EU and 2009/65/EC (AIFMD II)
- European Commission – Delegated Regulations adopting RTS on liquidity management tools for open-ended AIFs and UCITS (17 November 2025)
- Ogier – AIFMD II: a practical guide to implementation in Luxembourg (March 2026)
- EY Luxembourg – AIFMD II and UCITS VI: What the new EU framework means for US fund managers in Luxembourg (March 2026)
- Ashurst – Luxembourg adopts law transposing AIFMD II and UCITS VI (March 2026)
- Delano – CSSF sets 16 April deadline for new fund liquidity rules (March 2026)
- AQMetrics – AIFMD II implementation: imperatives beyond the template update (March 2026)