E.ON / OVO merger inquiry

The Competition and Markets Authority (CMA) is investigating the anticipated acquisition by E.ON SE (through E.ON UK Limited) of OVO Energy Ltd.

• From: Competition and Markets Authority
• Published: 8 July 2026
• Last updated: 2 September 2026 — See all updates

• Case type: Mergers
• Case state: Open
• Market sector: Utilities
• Opened: 8 July 2026

Statutory timetable

Date	Action
28 October 2026	Deadline for phase 1 decision (*)
2 September 2026	Launch of merger inquiry
8 July 2026 to 23 July 2026	Invitation to comment

(*) Whilst the CMA will seek to determine its investigation as quickly as possible, the statutory deadline can be extended in certain limited circumstances.

Phase 1

Launch of merger inquiry

2 September 2026: The CMA announced the launch of its merger inquiry by notice to the parties.

• Commencement notice (PDF, 90KB) (2.9.26)

Invitation to comment: closed

8 July 2026: The CMA is issuing this ‘invitation to comment’ to allow interested parties to submit to the CMA any initial views on the impact that the transaction could have on competition in the UK. The CMA has not yet launched its formal investigation into this transaction. This invitation to comment is the first part of the CMA’s information-gathering process.

To assist it with this assessment, the CMA invites comments on the transaction from any interested party.

Pre-notification

The CMA has received the necessary information from the parties to commence pre-notification.

Contact

Please send written representations about any competition issues to:

eon.ovo@cma.gov.uk

• Principal Case Officer: Darren Gysi, darren.gysi@cma.gov.uk
• Case Officer: Federico Torrigiani, federico.torrigiani@cma.gov.uk

Privacy notice

Your name and contact details are your personal data. In collecting, receiving, storing, accessing and using your personal data, the CMA, as controller, is processing your personal data. The CMA processes personal data in accordance with data protection law. The CMA is processing your personal data so that it can contact you again, should it need further help or information from you, in order to carry out its merger work under Part 3 of the Enterprise Act 2002. For more information about how the CMA processes personal data and your rights relating to that data, please read our personal information charter.

Published 8 July 2026

Last updated 2 September 2026 — Show all updates

1. 2 September 2026

   Merger inquiry launched and commencement notice published.

2. 8 July 2026

   First published.