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 3: Booking/eTraveli
The CMA unconditionally cleared Booking’s proposed €1.63bn acquisition of eTraveli in September 2022, but the transaction was blocked by the Commission one year later.
Both Booking and eTraveli operate online travel agencies (OTAs), though they focus on different product markets: Booking mainly provides hotel OTA services, while eTraveli mainly provides flight OTA services.
Despite the lack of major horizontal overlaps, the Commission was concerned that the enlargement of Booking’s “travel services ecosystem” through the acquisition of eTraveli would strengthen the company’s dominant position in the hotel OTA market in the European Economic Area (EEA).
One of the Commission’s key findings was that flight OTAs like eTraveli are an important customer acquisition channel for hotel OTAs in the EEA.
The CMA reached the opposite conclusion. It reckoned that flight OTAs are not a particularly significant customer acquisition channel for hotel OTAs in the UK.
Subscribed clients can directly access our full coverage through the following links:
- Booking/eTraveli EU case summary
- Booking/eTraveli 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
04 November 26
In nine European countries, national symmetric obligations on access to ducts go beyond the scope set by the Gigabit Infrastructure Act
Cullen International's latest benchmark analyses asymmetric and symmetric duct access obligations in Europe.
04 November 26
More than 60 cases and counting: a snapshot of European antitrust enforcement against big tech
Cullen International’s latest report on past and pending antitrust cases against big tech companies in Europe tracks enforcement activity under ex post antitrust rules at EU and national level.
30 October 26
Many governments around the globe rely on legal mechanisms to compel communications apps to cooperate in law enforcement investigations
Cullen International's latest Global Trends benchmark for number-independent communications apps regulation found that nearly all of the 13 surveyed jurisdictions around the world provide some legal mechanism to make these apps assist law enforcement in criminal investigations. There are requirements to verify user identities, compel disclosure of stored content, make encrypted content accessible, and duties to detect illegal content within private communications.