Mergers

Services

Merger notice forms

Forms for businesses to use to notify the CMA of an anticipated or completed merger.
Undertakings in lieu of reference form

Remedies form to be completed by merger parties for the offering of undertakings in lieu of reference.

Mergers - the CMA’s jurisdiction and procedure: CMA2
- Guidance
- 25 April 2024
- Competition and Markets Authority
Merger Assessment Guidelines (CMA129)
- Guidance
- 18 March 2021
- Competition and Markets Authority
Mergers: How to notify the CMA of a merger
- Detailed guide
- 12 November 2024
- Competition and Markets Authority
Variation and termination of undertakings and orders: CMA11
- Guidance
- 12 August 2015
- Competition and Markets Authority
Interim Measures and derogations: guidance and templates
- Guidance
- 21 December 2021
- Competition and Markets Authority

CMA could approve Synopsys / Ansys merger if competition concerns are resolved
- 20 December 2024
- Competition and Markets Authority
- Press release
CMA clears Vodafone / Three merger, subject to legally binding commitments
- 5 December 2024
- Competition and Markets Authority
- Press release
Spreadex required to sell Sporting Index
- 22 November 2024
- Competition and Markets Authority
- Press release
Viatris fined £1.5m for failure to comply with CMA order
- 22 November 2024
- Competition and Markets Authority
- Press release
CMA publishes interim report in corporate travel merger
- 6 November 2024
- Competition and Markets Authority
- Press release

Understanding past merger remedies – 2023 update
- 24 October 2023
- Competition and Markets Authority
- Research
Ex-post assessment of merger control decisions involving vertically-related firms
- 14 April 2022
- Competition and Markets Authority
- Research
Analysis of the investigation of the proposed acquisition of PacBio by Illumina
- 13 May 2020
- Competition and Markets Authority
- Research
Understanding past merger remedies
- 18 June 2019
- Competition and Markets Authority
- Research
Assessment of merger control decisions in digital markets
- 3 June 2019
- Competition and Markets Authority
- Research

Draft updated mergers guidance documents
- 20 December 2024
- Competition and Markets Authority
- Consultation outcome
- Date closed 12 September 2024
Changes to CMA rules of procedure for merger, market and special reference groups (CMA17)
- 25 April 2024
- Competition and Markets Authority
- Consultation outcome
- Date closed 11 April 2024
Changes to CMA mergers guidance (CMA2)
- 25 April 2024
- Competition and Markets Authority
- Consultation outcome
- Date closed 08 January 2024
New energy network merger guidance
- 3 April 2024
- Competition and Markets Authority
- Consultation outcome
- Date closed 24 January 2024
Call for information: Phase 2 merger investigations
- 20 November 2023
- Competition and Markets Authority
- Closed consultation
- Date closed 25 August 2023

Merger inquiry outcome statistics
- 3 December 2024
- Competition and Markets Authority
- Transparency
Breaches of the CMA’s markets and mergers remedies
- 21 October 2024
- Competition and Markets Authority
- Corporate report
Mergers orders and undertakings register
- 8 October 2024
- Competition and Markets Authority
- Corporate report
Enterprise Act 2002 merger remedies
- 28 June 2023
- Competition and Markets Authority
- Corporate report
Hospital Episode Statistics: CMA process
- 21 April 2017
- Competition and Markets Authority
- Transparency