Financial instruments reference data (FIRDS, MiFIR Art 27 / MAR Art 4)

The facts

Who files

Trading venues and systematic internalisers, submitting reference data to ESMA's FIRDS, via National Competent Authorities or directly, depending on the data type; this is one of the few ESMA data-reporting regimes where ESMA itself is the direct recipient, rather than an NCA or trade repository. Source

How often

Reference data is kept current as instruments are admitted to trading or change; transparency and volume cap results are published monthly or quarterly depending on the dataset. Source

Deadline

Not stated as a single deadline on the page read. Source

Format

XML. XML Schema, currently version 1.4.0 (from April 2026, following the MiFIR review of RTS 1 and RTS 2); earlier schema versions (1.1.0, 1.2.0, 1.2.1, 1.3.0) applied from 2019, 2022 and 2024 respectively. 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

Markets and infrastructure

Templates (0)

The library lists no templates for this return.

Reference data and transparency results are exchanged as XML messages (for example auth.033 non-equity reference data, auth.044 equity calculation results); not a fixed set of named forms. 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

Validations are based on the CFI code (ISO 10962:2015); schemas and validation rules are published alongside the reporting instructions.

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

Published only added up across firms. ESMA publishes the Financial Instruments Reference Database (FIRDS), the Financial Instruments Transparency System (FITRS, equity and non-equity transparency calculation results) and Double/Single Volume Cap mechanism data, all on its public registers. Source

Where it is published (XML result files (DATMIC, DATEQU/DATNQU historically, DVCRES/SVCRES))

• ESMA registers (FIRDS, FITRS, Volume Cap mechanism)

  Added up across firms · XML and Excel result files

  Public registers of financial instrument reference data (FIRDS), equity and non-equity transparency calculation results (FITRS) and Double/Single Volume Cap mechanism results and suspensions, published and updated on ESMA's website. Source

Official documents (1)

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.

• FIRDS Reference Data Reporting Instructions (v2.1, ESMA65-11-1193)

  Instructions · PDF

Sources

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

• esma.europa.eu/data-reporting/mifir-reporting

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