File a merger notification with CCCS

The merger notification process may comprise of two Phases depending on the competition issues related to the merger or anticipated merger:

Phase  How to submit Key Documents Required  Estimated Time
Phase 1 review  

Online Form M1 submission page

1)   Detailed submissions

2)   Third party contact details 

3)   Supporting documents

A template waiver of confidentiality restrictions permitting CCCS to exchange or discuss confidential information with other competition authorities for the purposes of reviewing the merger can be found here.

* The detailed submissions template was last updated on 31 August 2023. The third party contact details template was last updated on 7 September 2023

30 working days upon receipt of online Form M1 submission (including detailed submissions, third party contact details and supporting documents).
Phase 2 review 

Please approach the case team responsible for your Phase 1 review for further details.

 Form M2 and supporting documents

* Form M2 was last updated on 3 January 2022

120 working days upon receipt of Form M2 and supporting documents


To apply to CCCS for a decision of the merger or anticipated merger, fill out Form M1 and submit it to CCCS, together with the prescribed fee (see How much does it cost). Applicants must also provide a copy of any notices required to be given under regulation 5 of the Competition (Notification) Regulations 2007 to CCCS within 2 working days from the date of the notification. You may also submit Form M2 (together with Form M1) if you consider that the merger is likely to go into a Phase 2 review. Once CCCS receives Form M1, it will conduct a preliminary assessment (Phase 1 review) which is expected to be completed within 30 working days. Form M1 or Form M2 must be accompanied by supporting documents. The Form and any supporting documents are to be submitted in the format set out at this link. CCCS may request a hard copy of the original documents if required during Phase 1 and Phase 2.

The merger will be cleared at Phase 1 if CCCS is able to reach a favorable decision based on information collected during the Phase 1 review period. If CCCS still requires further information or clarifications at the end of the Phase 1 review, we will notify you that we have not reached a decision. You will then be asked to submit Form M2 if you have not already done so, so that we can proceed to conduct a more detailed assessment (Phase 2 review). We will stipulate a deadline within which you are to submit Form M2. Merger parties who are unable to comply with the deadline should request for an extension as soon as possible. If Form M2 is not submitted within the deadline or extension, we may determine the application by not giving a decision.

Once we receive Form M2, we aim to complete the Phase 2 Review within 120 working days. 

You will note that we are required to get third party inputs about the transaction as part of our review in Phases 1 & 2. Therefore, if Form M1 or Form M2 and the supporting documents contain any information which you feel is confidential, a non-confidential version of the form or document must be submitted. Any confidential information removed from the non-confidential versions should be replaced by square brackets containing the word “CONFIDENTIAL”. The non-confidential version of each document must also be accompanied by a separate annex identifying the confidential information and explaining why the information should be treated as confidential. We may seek further clarification of these reasons. The non-confidential version will be used to seek inputs from third parties.   

In the course of the application, CCCS may also request further information over and above that required in Form M1 or Form M2. Failure to furnish the information may also result in CCCS exercising its discretion to determine the application without giving a decision.