Collection

CMA mergers guidance

A collection of guidance published by the CMA on mergers work.

• From: Competition and Markets Authority
• Published: 31 March 2014
• Last updated: 8 August 2023 — See all updates

Some of this guidance was originally published by the Office of Fair Trading (OFT) and Competition Commission (CC) and has been adopted by the CMA board. Please see individual publication pages for full details.

Guidance documents

• Mergers - the CMA’s jurisdiction and procedure: CMA2
  • 25 April 2024
  • Guidance
• Energy network mergers: CMA190
  • 3 April 2024
  • Guidance
• Quick guide to UK merger assessment: CMA18
  • 18 March 2021
  • Guidance
• Merger Assessment Guidelines (CMA129)
  • 18 March 2021
  • Guidance
• Disclosure of information in CMA work: CC7
  • 5 July 2017
  • Guidance
• CMA’s mergers intelligence function: CMA56
  • 23 December 2020
  • Guidance
• Economic analysis submissions best practice: CC2com3
  • 1 February 2009
  • Guidance
• Government in markets: OFT1113
  • 1 September 2009
  • Guidance
• Mergers customer survey design and presentation
  • 23 May 2018
  • Guidance
• Mergers exceptions to the duty to refer and undertakings in lieu
  • 25 April 2024
  • Guidance
• Merger remedies
  • 13 December 2018
  • Guidance
• Variation and termination of undertakings and orders: CMA11
  • 12 August 2015
  • Guidance
• Interim Measures and derogations: guidance and templates
  • 21 December 2021
  • Guidance
• Internal documents in merger investigations
  • 15 January 2019
  • Guidance
• Merger and market remedies: Guidance on reporting, investigation and enforcement of potential breaches
  • 11 May 2023
  • Guidance
• Transparency and disclosure - statement of CMA’s policy and approach: CMA6
  • 2 December 2016
  • Guidance
• Guidance on the functions of the CMA after the end of the Transition Period
  • 1 December 2020
  • Guidance
• Administrative Penalties: Statement of Policy on the CMA’s Approach (CMA4)
  • 19 December 2024
  • Guidance
• Rules of procedure for merger, market and special reference groups: CMA17
  • 25 April 2024
  • Guidance

Notice forms

• Phase 2 remedies form
  • 25 April 2024
  • Guidance
• Mergers: How to notify the CMA of a merger
  • 12 November 2024
  • Guidance
• Merger notice forms
  • 25 April 2024
  • Form
• Undertakings in lieu of reference form
  • 30 October 2015
  • Form

Templates

• Merger fees payment information
  • 20 July 2023
  • Guidance
• Merger inquiry outcome statistics
  • 3 December 2024
  • Transparency data
• Mergers orders and undertakings register
  • 8 October 2024
  • Corporate report
• Interim measures in merger investigations
  • 28 June 2019
  • Consultation outcome
• Confidentiality waiver template
  • 25 April 2024
  • Guidance
• Merger enquiry letter template
  • 7 April 2016
  • Guidance
• Confidentiality ring and disclosure room undertakings templates
  • 20 January 2017
  • Guidance

Sector specific guidance

• Retail mergers commentary: CMA62
  • 10 April 2017
  • Guidance
• Review of NHS mergers: CMA29
  • 31 July 2014
  • Guidance
• Water and sewerage mergers: CMA49
  • 13 November 2015
  • Guidance
• Rail Franchises: guidance for bidders
  • 15 March 2018
  • Guidance

Published 31 March 2014
Last updated 8 August 2023 + show all updates

1. 8 August 2023

   Collection updated.

2. 31 July 2014

   Review of NHS mergers: CMA29 added

3. 31 March 2014

   First published.