- Annex IV reports are filed annually, half yearly or quarterly depending on assets, leverage and strategy. They are due within one month of the period end, with an extra 15 days for funds of funds.
- AIFMD II sets 16 April 2027 as the date for ESMA to deliver the new reporting standards. Plan for a new template and a period of running old and new side by side.
- Most filing problems start upstream: late administrator feeds, missing identifiers, inconsistent asset classification and leverage or liquidity figures calculated in spreadsheets.
What Annex IV is and who files it
The name comes from Annex IV of the AIFMD Level 2 Regulation (Commission Delegated Regulation (EU) No 231/2013), which sets out the reporting template. Every authorised AIFM reports on itself and on each AIF it manages or markets in the EU. In Ireland the returns are submitted to the Central Bank through its online reporting system.
A typical filing covers:
- At AIFM level: assets under management, main markets and instruments traded.
- At AIF level: principal exposures and concentrations, the liquidity profile of the portfolio and of the investor base, risk measures, counterparty exposures, leverage under the gross and commitment methods, and investor concentration.
How often you file depends on the size of the AIFM and each AIF, whether leverage is used and the investment strategy. Unleveraged private equity style funds often file once a year, while larger or leveraged managers file quarterly. Reports are due within one month of the end of the reporting period, and funds of funds get an extra 15 days.
What AIFMD II changes
AIFMD II (Directive (EU) 2024/927) applied from 16 April 2026, and Ireland implemented it through amendments to the AIFM Regulations and a revised AIF Rulebook. On reporting, it amends Article 24 and asks ESMA to develop technical standards that will:
- replace the current Annex IV template with a harmonised EU format
- set reporting frequency and timing consistently across member states
- specify identifiers that link reported data to supervisory and public sources
The new dataset is expected to include data that was never collected before, notably detailed delegation arrangements and staff resources, the use of liquidity management tools and, where relevant, loan origination.
AIFMD II also brings UCITS management companies into a formal supervisory reporting regime for the first time, modelled on Annex IV. ESMA has described its wider aim as an integrated reporting framework for AIFMD and UCITS, so firms that manage both should plan one programme, not two.
On timing, ESMA was expected to consult on the new standards in the second half of 2026, with 16 April 2027 as the deadline for delivering them to the European Commission. The new template applies once the standards are adopted. The exact fields are not final, but the direction is clear: more data, more structure and less room for manual workarounds.
AIFMD II also sets 16 April 2027 as the final deadline for UCITS and open ended AIFs authorised before 16 April 2026 to comply with the new liquidity management tool rules. That data will feed reporting too.
Why Annex IV filings go wrong
- Administrator, depositary and investment manager files arrive late or incomplete, so the reporting team starts already behind.
- LEIs, ISINs and counterparty identifiers are missing or differ between sources.
- The same instrument is classified one way in the risk system and another way in the reporting tool.
- Gross and commitment leverage, and the liquidity buckets for portfolio and investors, are calculated in spreadsheets with no versioned method.
- Assets under management in the return do not tie back to the NAV or the accounts.
- Validation errors are fixed by editing the XML by hand, so the next period repeats the same problem.
- There is no record of what was corrected, by whom and why.
None of this is about the template. It is about the data underneath it, and a new template will expose those gaps faster.
How to build an Annex IV dataset that will survive the new template
1. Build one reporting dataset per period, from source
Bring administrator, depositary, prime broker and investment manager data into a store the AIFM controls. Freeze a snapshot for each reporting date, so every figure in the return can be traced to the files it came from.
2. Fix reference data first
Maintain LEIs, ISINs, counterparty records and asset classification mappings in one place. Most rejected filings trace back to reference data, not calculations.
3. Move calculations out of spreadsheets
Code the leverage, liquidity and exposure calculations, keep the methodology versioned and test it against prior filings. When ESMA changes a definition, you change it once.
4. Validate before you generate the XML
Run the ESMA validation rules, your own business checks and reconciliations to the NAV and the accounts before the file is produced. A clean file is then a formality.
5. Keep lineage and a correction history
Record every adjustment, who approved it and why. This is the evidence your Designated Persons and the Central Bank will ask for.
6. Design for two templates
Treat the template as a mapping layer on top of your dataset. When the new standards land, you add a second mapping and run both in parallel until the outputs reconcile.
7. Start collecting the new data now
Delegation details, staff resources and liquidity management tool data are not reported today, but they will be. Collecting them in a structured way now avoids a scramble later.
Where AI helps, and where it should not
AI is useful around Annex IV, not inside the final numbers. It can suggest asset classifications for new instruments, read prospectus and offering terms to pull out liquidity management tool details, explain why a figure moved since last period and draft notes for reviewers. The calculations themselves should stay deterministic and tested, and every AI suggestion should be reviewed and approved by a person before it reaches a filing.
A practical timeline to April 2027
- Now to the end of 2026: run a gap analysis of your current data against the current template and the fields expected under AIFMD II. Clean up reference data and document your calculation methods.
- First quarter of 2027: build or extend the reporting dataset, the validations and the lineage. Respond to the ESMA consultation if it is still open, because definitions are shaped by industry feedback.
- From the second quarter of 2027: add the new template as a second output and run it alongside the current one until the figures agree.
How HST can help
HST Solutions builds the ingestion, validation and reporting pipelines behind regulatory filings for fund managers, ManCos and administrators. For Waystone we built PPM, a platform that automates the ingestion and transformation of provider files with configurable cleansing and mapping rules. Your reporting and compliance teams own the rules and sign off. Our engineers build the data foundation that makes each filing repeatable. We are ISO 27001 and ISO 22301 certified.
If your Annex IV process still depends on late files and spreadsheets, talk to an engineer, or see how we work with fund managers, ManCos and administrators.
