The United Kingdom‘s Competition and Markets Authority (CMA) has confirmed that Amazon’s $4 billion partnership with AI startup Anthropic will not be subject to a more in-depth investigation. The regulator determined that the deal did not raise competition concerns under Britain’s merger regulations.

Amazon expressed support for the CMA’s decision, noting that it acknowledged the regulator’s lack of jurisdiction over the collaboration. The CMA also cleared a similar partnership between Microsoft and Inflection AI, while a deal between Alphabet and Anthropic remains under review.

Anthropic, which was co-founded by siblings Dario and Daniela Amodei, former OpenAI executives, reiterated that its partnerships with major tech firms do not compromise its independence or governance. The startup has received billions in investments from several large companies.

Amid growing antitrust scrutiny of deals between startups and big tech firms, regulators are closely monitoring collaborations like those involving Anthropic and its partners.