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In forceIssuer disclosureLast checked 13 November 2026

Annual financial reports in the European Single Electronic Format (ESEF)

A regulatory return listed by the European Securities and Markets Authority (ESMA), European Union.

ESMA develops the regulatory technical standards (RTS) that specify the European Single Electronic Format, the single electronic format in which issuers with securities on EU regulated markets must prepare their annual financial reports (AFRs), so that the IFRS consolidated financial statements inside them are machine-readable as well as human-readable. Source

The facts

Who files
Issuers required by the Transparency Directive (2004/109/EC, as amended) to publish annual financial reports. Issuers file their ESEF-format AFRs with their home member state's National Competent Authority (or the Officially Appointed Mechanism it designates for storing regulated information), not with ESMA; ESMA writes the RTS, the taxonomy and the Reporting Manual, and coordinates enforcement convergence across NCAs through the ESEF Project Team. Source
How often
Annual, alongside the annual financial report the Transparency Directive requires. Source
Deadline
Set by the Transparency Directive's own annual-financial-report deadline (not restated on the ESMA pages read); ESMA's own pages do not add a separate ESEF-specific deadline. Source
Format
iXBRL. Annual financial reports are prepared in XHTML; where they contain IFRS consolidated financial statements, these are tagged with the ESEF taxonomy using Inline XBRL, so the tags are embedded in the human-readable XHTML document. Since 1 January 2022 the Notes to the financial statements are block-tagged (tagging larger pieces of information such as explanatory notes and accounting policies) rather than tagged in detail. Source
How it is filed
The format above is what the library records; what could not be verified is on the ESMA's page.
Status
In force
Group
Issuer disclosure

Templates (0)

The library lists no templates for this return.

The ESEF taxonomy is a dictionary of taggable elements, not a set of named forms; its human-readable labels are in Annex VI of the RTS on ESEF. The 2025 ESEF Conformance Suite consists of 215 test packages grouped into 68 tests, used to check software rather than to file reports. Source

Validation rules

The ESMA publishes the checks it runs on this return. They could not be counted from the published material. They are written for people to read; software cannot run them as published. Source

The ESEF Reporting Manual gives guidance on common issues and how to resolve them, and the Conformance Suite's accompanying Excel file describes the rules, guidelines and test cases with expected error codes; no single count of rules is stated on the pages read.

The rules, on esma.europa.eu

Counts are in the ESMA's own unit, so they are not comparable with other regulators' counts.

Public data

No published data from this return was found. Filed AFRs are stored by each NCA's Officially Appointed Mechanism, not by ESMA centrally; ESMA instead publishes its own annual enforcement statistics (European Common Enforcement Priorities and the annual corporate-reporting enforcement report), which are aggregate commentary, not firm-level filed data. Source

Official documents (3)

The ESMA's own files, with the size and SHA-256 fingerprint of each as downloaded on 13 November 2026, so anyone can tell whether a copy is the same version.

Sources

Every page and document this return's facts were read from.

Knowing exactly what is collected, in what format and under which rules is the first step to real-time supervision. Line4 builds SupTech software for financial regulators that runs checks like these as each return arrives.

Line4's own text, and the way Line4 has collected and arranged these records, are free to reuse under CC BY 4.0. Please credit: “Source: Line4 regulatory submissions library (CC BY 4.0), https://www.line4.ai”. The facts themselves belong to no one. The regulators' document titles, template names, quoted terms and documents belong to them and are not covered by this licence: see ESMA's reuse terms. This describes what regulators publish. It is not legal or regulatory advice: always rely on the regulator's own text. Not affiliated with or endorsed by any regulator.

Source: European Securities and Markets Authority (ESMA), https://www.esma.europa.eu. The plain-English summaries are Line4's own; ESMA does not endorse this library.

Last checked 13 November 2026.