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Published on 19 November 2025

CSSF Update : Submission of Table B2.4 from 1 February 2026

CSSF

From 1 February 2026, Table B2.4, which details participations and subordinated loans, must be submitted via eDesk or S3/API. A detailed user guide will be made available on eDesk shortly.

What is changing

The format of the report as well as its transmission method.

  • The format changes from XML to JSON.

  • The report must be submitted:

    • manually via eDesk

    • automatically via an S3-compatible tool (API) such as RSend provided by U IT

The report frequency remains annual.

Official documentation

Automated transmission of eDesk reports

All eDesk reports can be submitted manually or automatically.

U IT has developed an automated transfer solution dedicated to eDesk called RSend. For more information, please consult the following page on our website:

https://www.uit.lu/cssf-edesk-S3-rsend.php