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Updates to the CMA’s Merger Assessment Guidelines (CMA129)

The CMA is consulting on proposed updates to its published guidance relating to the substantive approach of the CMA to its analysis when investigating mergers.

Last fetched 03 May 2026 · gov.uk
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We are consulting on updates to the CMA’s Merger Assessment Guidelines, which set out the substantive approach of the CMA to its analysis when investigating mergers. The updated guidelines will help companies and their advisers in assessing whether competition law concerns might be raised by a merger.

These guidelines have been revised in order to bring them up to date with current best practice. The CMA’s current guidelines were published in 2010, and since then, markets have evolved and changed at a rapid pace. Building on recommendations made by the Furman and Lear reports in 2019 on how the CMA should approach its assessment of digital mergers, the updated guidelines reflect the legal framework within which the CMA undertakes merger assessments and have been updated to take account of the CMA’s recent experience and case law.

For more information, see Consultation launched on CMA merger assessment guidelines.

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