Line4

In forceFund service providers: other returns (national)Last checked 11 November 2026

Custody and prime broker network return (depositaries)

A regulatory return listed by the Central Bank of Ireland (CBI), Ireland.

Gives details of each depositary's global custody network: for each step in the chain, the country and name of the global custodian, direct sub-custodian, prime broker or collateral agent, its role and its LEI. Source

Official title: Custody and Prime Broker network return bi-annual return

The facts

Who files
Depositaries. Source
How often
Bi-annually. Source
Deadline
Within 2 months of firm or branch year end and within 2 months of firm half year end. Source
Format
Excel. The Custody and Prime Broker Return template (Excel) submitted on the Portal; the Cover sheet shows the count of validation errors and the status must be Valid. Source
How it is filed
Filing routes recorded for the CBI: Central Bank of Ireland Portal (formerly the Online Reporting System, ONR); MiFIR transaction reporting Machine to Machine channel; Online Reporting System (ONR), now linked as 'Credit Union Auditor Reporting'; Email to the Central Bank. See how firms file with the CBI.
Status
In force
Group
Fund service providers: other returns (national)

Templates (1)

The tables and forms inside the return. Plain name first, the CBI's code in brackets.

  • Custody network (Custody Network)

Data sheet of the published template (also Cover, Categorical_Data and Custody Network_Validations sheets). Source

Validation rules

The CBI publishes the checks it runs on this return. They could not be counted from the published material. Software can run them exactly as published. Source

How they are written: Excel formulas in the 'Custody Network_Validations' sheet.

The rules, on centralbank.ie

How they were counted

Not counted: the checks are built into the template's validation sheet as formulas.

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

Public data

No published data from this return was found. No data from this return published by the Central Bank was found on the pages checked. Source

Official documents (3)

The CBI's own files, with the size and SHA-256 fingerprint of each as downloaded on 11 November 2026, so anyone can tell whether a copy is the same version.

  • Reporting Requirements for Depositaries

    List of returns · HTML

  • Depositary Reporting Requirements

    List of returns · PDF · 245.6 KB

    Depositary Regulatory Reporting Requirements: every return with its frequency and deadline.

    SHA-256 4d9e25f6cddashow in full4d9e25f6cdda2111fac3c32220d134a8c374e442ac5cd91d46d3951a306eb364
  • Custody and Prime Broker Return template

    Template · XLSX · 247.7 KB

    Sheets: Cover, Custody Network, Categorical_Data, Custody Network_Validations.

    SHA-256 26cf9c424f23show in full26cf9c424f2338b3cc600a0b6bfc3cac12da9fecc1d9eba087ee890e9ab0b13b

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 text and records here 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 regulators' documents, forms, taxonomies, rules and data belong to them: see CBI's reuse terms. This describes what regulators publish. It is not legal or regulatory advice: always rely on the regulator's own text.

Contains Irish Public Sector Information from the Central Bank of Ireland (https://www.centralbank.ie), copyright Central Bank of Ireland, re-used under the Bank's licence for re-use of public sector information (https://www.centralbank.ie/fns/re-use-of-public-sector-information). This library summarises it in plain English and links the originals; the Central Bank of Ireland does not endorse this library.

Last checked 11 November 2026.