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The UK Competition and Markets Authority (CMA) investigated Amazon’s partnership with AI company Anthropic in 2024, but the case is now closed. On September 27, 2024, the CMA concluded that the arrangement did not meet the statutory tests for referral under UK merger law. That was not a Phase 2 clearance or a finding that the partnership posed no competition risks: the CMA did not need to decide whether Amazon had acquired material influence over Anthropic.
What Amazon and Anthropic agreed
The CMA examined a package of investment and commercial arrangements, not just a cash investment. Amazon invested $1.25 billion in Anthropic in September 2023 and a further $2.75 billion in March 2024, bringing its total investment to $4 billion. The investment could convert into non-voting equity in certain circumstances.
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The wider relationship connected Anthropic’s AI models with Amazon Web Services (AWS):
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- The companies agreed to collaborate on future Trainium and Inferentia technology.
- Anthropic committed to make its models available through Amazon Bedrock on a long-term, non-exclusive basis.
- Amazon received non-exclusive licenses to use Anthropic’s foundation models in Amazon services, as well as certain consultation and advice rights on significant Anthropic business issues.
The CMA’s summary of its decision describes these connected elements. The $4 billion figure refers to Amazon’s investment; it is not a stated valuation of all the contractual commitments.
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Why a partnership could be examined under merger law
UK merger control is not limited to acquisitions that transfer voting control. The CMA can consider whether an arrangement gives one business material influence over another’s management, strategic direction or commercial objectives. A minority investment may be relevant when combined with governance or consultation rights, supply arrangements, distribution links, or practical dependence on a provider.
The CMA said compute-supply and distribution agreements between a foundation-model developer and a cloud provider can, depending on the circumstances, contribute to material influence. Non-exclusive wording does not by itself settle the question if the practical relationship creates significant dependency. The CMA considered Amazon’s investment and commercial rights in that broader context, but it did not make a definitive finding that Amazon had material influence over Anthropic.
The inquiry also sat within the CMA’s broader scrutiny of partnerships between major technology companies and AI developers. In April 2024, the regulator invited views on arrangements including Microsoft and Inflection, Microsoft and Mistral AI, Google and Anthropic, and Microsoft and OpenAI. Its announcement on AI partnerships asked whether such arrangements could create a relevant merger situation and, if so, whether they might substantially lessen competition in UK markets.
Why the CMA closed the case without a Phase 2 review
Before referring a case for an in-depth competition review, the CMA must establish that the statutory jurisdictional conditions for a relevant merger situation are met. In this case, the CMA said they were not: Anthropic’s UK turnover did not exceed the £70 million threshold, and the parties did not meet the 25% share-of-supply test on the evidence available to the CMA.
Because those tests were not satisfied, the CMA did not need to decide whether Amazon had acquired material influence. It concluded that the partnership did not qualify for referral under the merger provisions of the Enterprise Act 2002 and did not refer it for a Phase 2 investigation. The full decision sets out the jurisdictional reasoning.
What the decision does—and does not—mean
- It was a merger inquiry, not an infringement finding. The CMA was considering whether the arrangement fell within UK merger-control rules and, if so, its potential competitive effects. It did not find that Amazon had abused dominance or breached competition law.
- It was not an approval after a full competition assessment. The case ended at the jurisdictional stage, before a Phase 2 review of market effects, remedies or a definitive assessment of material influence.
- It was not a ruling that the partnership raised no possible concerns. The CMA’s conclusion was that the legal conditions for referral were not met on the evidence and facts it assessed.
- It was not a blanket exemption for AI partnerships. A different arrangement, different evidence or different market circumstances could lead to a different jurisdictional assessment.
Anthropic remained a separate company; Amazon did not acquire it outright. But describing the relationship as simply an ordinary investment—or saying Amazon had no influence—would also miss the combination of investment, cloud infrastructure, chips, model distribution, licensing and consultation rights that the CMA examined.
Why the case matters for AI and cloud competition
AI foundation models depend on infrastructure to train and serve them, while cloud providers can also distribute models to customers and integrate them into their own products. When one company supplies compute, provides capital and helps distribute a developer’s models, the relationship can connect markets that might otherwise be considered separately. Regulators may therefore look beyond a shareholding to the practical effect of the entire package.
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The decision illustrates a gap between potential competition questions and the legal jurisdiction to investigate a merger. A company can be strategically important worldwide while its UK turnover or relevant UK share of supply remains below the applicable threshold. That makes the CMA’s outcome specific to the legal tests and evidence for this case, rather than a judgment on the competitive effects of every Amazon–Anthropic or cloud–AI relationship.
US scrutiny was separate. The Federal Trade Commission issued a staff report in January 2025 following its own study of AI partnerships and investments involving Amazon, Anthropic, Alphabet, Microsoft and OpenAI. That US study was not part of the CMA’s UK case. The FTC’s announcement describes its separate work.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What AWS customers should know about Claude access
Amazon Bedrock is one route for organizations to access Claude through AWS. Customers use a managed service, not ownership of Anthropic’s model weights. Model availability, pricing, regions, data handling and service controls can vary by model and AWS configuration. The CMA’s decision does not guarantee a particular model, price or future availability.
For a purchasing decision, compare the service and procurement path that fits your organization rather than assuming the partnership makes one option universally better. AWS publishes Bedrock information and model-specific pricing; check current terms, regions and model availability directly because they can change.
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Timeline of the CMA case
| Date | Event |
|---|---|
| September 25, 2023 | Amazon and Anthropic announced their strategic collaboration and Amazon’s planned investment of up to $4 billion. |
| March 27, 2024 | Amazon announced completion of its additional $2.75 billion investment, taking the total to $4 billion. |
| April 24–May 9, 2024 | The CMA invited public comments on the partnership. |
| August 8, 2024 | The CMA formally launched its merger inquiry. |
| September 27, 2024 | The CMA announced that the partnership did not qualify for investigation under the merger provisions. |
| October 17, 2024 | The CMA published its full decision; the case is listed as closed. |
The CMA’s case page records the inquiry and its closed status. Amazon’s announcements provide the company’s account of the original collaboration and the completed investment.
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