Benchmark Administrator

FCA Approved

A market leader in governance of financial benchmarks

A leader in the governance of financial indices, WMBA Limited was one of the first FCA approved Benchmark Administrators under the EU Benchmarks Regulation ('BMR') and the predecessor FCA MAR. WMBA Limited is listed on the European Securities and Markets Authority ('ESMA') 'Register of administrators' located in the Union which have been authorised or registered pursuant to Article 34 of the Benchmarks Regulation.

Details of WMBA Limited's FCA authorisation and permissions along with regulatory waivers can be found on the FCA register under Financial Registration Number 679716.

WMBA Limited developed and administers indices across financial and non-financial instruments on behalf of its members and customers. Developing that business and utilising our wealth of experience, WMBA Limited have established a suite of services supporting clients with the requirements and opportunities arising from the benchmark regulations.



WMBA Limited is currently the administrator for the Repurchase Overnight Index Average ('RONIA') and Euro Overnight Index Average ('EURONIA') benchmarks introduced in January 2007 and January 1999 respectively.

WMBA Limited fully supports the objectives of the IOSCO Principles for Financial Benchmarks ('IOSCO Principles') and the BMR to create a common framework for the regulation of indices used as benchmarks in financial markets. Whilst there is no requirement for all indices to be compliant with those regulations, WMBA Limited shall where it is possible and proportionate to do so, apply the framework to all indices, as well as the benchmarks that it administers.


A brief history of WMBA Limited

WMBA Limited was incorporated in 2008 to administer the data business of the European Venues & Intermediaries Association (previously known as the Wholesale Markets Brokers' Association).

On the 1st April 2015, SONIA and RONIA, both of which were administered by WMBA Limited at the time, became specified benchmarks under the UK Financial Services and Markets Act 2000, and as such, WMBA Limited became regulated by the Financial Conduct Authority (FCA) for the activity of administering benchmarks.

WMBA Limited was previously the administrator of the Sterling Overnight Index Average ("SONIA"), introduced in March 1997, until the Bank of England took over the control of the Benchmark in April 2018.