CMA’s mergers intelligence function: CMA56

Dec 23rd '20

Guidance for lawyers and third parties on how the Competition and Markets Authority (CMA) collects information before deciding whether to investigate a merger.


This guidance describes the steps that the CMA might take before it decides whether to investigate an unnotified merger. It is intended for lawyers advising merging parties on whether to notify the CMA of a merger, and for third parties who may wish to alert the CMA of an unnotified merger.


This guidance supplements Chapter 6 of Mergers: Guidance on the CMA’s jurisdiction and procedure (CMA2).


Please note that the e-mail address for mergers intelligence is


Download: Guidance on the CMA’s mergers intelligence function


Published 17 June 2016
Last updated 23 December 2020

  • 23 December 2020 – Updated CMA56 guidance published
  • 5 September 2017 – Updated guidance published
  • 17 June 2016 – First published.


Source: CMA


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