The UK's exit from the EU in 2021 empowered the UK Competition and Markets Authority (CMA) to probe big global mergers concurrently with the European Commission. So far, six acquisitions in digital markets have faced such parallel merger reviews. In five of them, both the acquirer and the target was a US-based company.
Our new report looks at these cases side by side, shedding light on the different conclusions often reached by the two authorities.
Stay tuned over the next weeks, as we look back at each case that saw divergent outcomes. Complimentary copies of detailed case summaries from Cullen International’s Antitrust & Mergers Database are available on request.

Case 4: Meta/Kustomer
The last case of EU-UK divergence we will look at is Meta’s $1bn (€921m) acquisition of Kustomer, a customer relationship management (CRM) software provider.
The transaction did not ring alarm bells at the CMA, mainly due to Kustomer’s limited size in the CRM software market. It received unconditional clearance in the UK following an initial review in September 2021.
In contrast, the Commission’s in depth investigation concluded that the acquisition would harm competition in the CRM software market, where Meta could foreclose Kustomer’s rivals by denying or degrading their access to its messaging channels (Messenger, WhatsApp and Instagram).
The Commission eventually cleared the transaction in January 2022, subject to a set of access commitments by Meta.
These commitments were lifted in November 2023, after Meta spun off Kustomer, retaining only a non-controlling minority stake in the company.
Subscribed clients can directly access our full coverage through the following links:
- Meta/Kustomer merger EU case summary
- Meta/Kustomer merger UK case summary
- Report on parallel merger reviews in the EU and UK
If you are not subscribed to our Antitrust & Mergers service, you can request more information and access through the button below.
more news
05 October 26
Ireland, the Netherlands and France account for the highest sum of data protection fines against large digital platforms
Our latest benchmark tracks fines imposed on large digital platforms by data protection and other supervisory authorities in 19 European countries since May 2018. It covers GDPR and e-Privacy Directive infringements and identifies whether the GDPR consistency mechanism was used in cross-border cases.
02 October 26
Saudi Arabia concludes a new round of market analysis
Cullen International's latest benchmark provides details on the market analysis regulatory framework in 13 MENA countries.
01 October 26
How are EU member states transposing NIS2?
Our latest benchmark tracks the progress of the Directive on measures for a high common level of cybersecurity across the EU (NIS2) transposition in the 27 EU member states.