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Guidance

CMA’s mergers intelligence function

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

Updates to this page

From:
Competition and Markets Authority
Published:
17 June 2016
Last updated:
28 October 2025
Show all updates

  1. Template updated to reflect changes to the CMA's mergers process

  2. Updated CMA56 guidance published.

  3. Updated guidance published.

  4. First published.

Documents

Guidance on the CMA’s mergers intelligence function

Ref: CMA56

PDF, 246 KB, 12 pages

Details

This guidance describes the steps that the Competition and Markets Authority (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).

To contact mergers intelligence, email mergers.intelligence@cma.gov.uk

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