Why Amazon Partnering With OpenAI and Anthropic Could Raise Antitrust Concerns

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Amazon holds investments in OpenAI and Anthropic, while both artificial intelligence (AI) developers have committed to buy large amounts of computing services from Amazon Web Services (AWS). Amazon’s OpenAI investment alone is $50 billion; Anthropic has pledged more than $100 billion to AWS over a decade. Through its Bedrock service, Amazon also offers those developers’ AI models alongside its own, called Nova.

That makes Amazon investor, supplier and competitor at once, even as its financing helps the developers build capacity. Those relationships could raise antitrust concerns if they reduce the developers’ ability to change suppliers or compete independently. The competition question turns on what the deals let the companies do, rather than the size of the investment alone.

What Amazon is buying, and what the developers are buying back

Amazon announced its OpenAI investment and commercial agreements on February 27, 2026. It said it would invest $50 billion: $15 billion at first and another $35 billion when certain conditions were met. Amazon invested $28.7 billion in OpenAI preferred stock in the six months that ended June 30, 2026, and funded the remaining $21.3 billion after that date, according to its quarterly filing. Preferred stock generally provides financial preferences, such as dividend payments before those on common stock.

Under the commercial agreement, OpenAI and AWS expanded an existing $38 billion arrangement by $100 billion over eight years. OpenAI committed to use approximately 2 gigawatts of capacity built on Amazon’s Trainium chips. That is a commitment to purchase computing services, separate from Amazon’s purchase of OpenAI stock. Gigawatts are units of electrical power. Here the figure describes the scale of the computing infrastructure, not the quality of an AI model.

The OpenAI announcement names AWS the exclusive third-party cloud distribution provider for OpenAI Frontier, a platform that lets organizations build and manage teams of AI agents. That exclusivity covers Frontier and that distribution role; the announcement does not say Amazon is the exclusive supplier of every OpenAI model or computing need.

Anthropic announced its expanded Amazon computing agreement on April 20, 2026. It committed more than $100 billion over ten years to AWS technologies, for up to 5 gigawatts of new capacity to train and run Claude, its AI model. Amazon describes AWS as Anthropic’s primary training and cloud provider for mission-critical workloads. Primary is a description of the supplier’s role, not a claim that every Anthropic workload must use Amazon.

Amazon’s money went into Anthropic earlier: from the third quarter of 2023 through the fourth quarter of 2025, it invested $8 billion in convertible notes, which can later convert into shares. The notes can convert subject to a cap on Amazon’s ownership, which Amazon may elect to waive. Portions of those notes converted to nonvoting preferred stock in the first quarters of 2025 and 2026.

Alongside the new computing agreement, Amazon said it would invest $5 billion immediately and up to another $20 billion tied to commercial milestones, in addition to that $8 billion. Amazon’s quarterly filing records two $5 billion purchases of Anthropic nonvoting preferred stock in the second quarter of 2026, one in Series G and one in Series H. Series G and Series H name separate Anthropic fundraising rounds. Nonvoting means the shares do not carry ordinary shareholder votes, although separate contractual rights can still affect a partner’s influence.

Amazon also agreed to make a financing facility available to Anthropic, initially capped at $20 billion and reduced to $15 billion by the Series H investment. Additional amounts become available for Anthropic to draw at its discretion as AWS meets computing-capacity delivery milestones.

Anthropic can draw this financing by issuing new convertible notes to Amazon or, after an initial public offering or another liquidity event and subject to Amazon’s ownership cap, by issuing common stock in exchange for cash. The facility expires thirty months after an Anthropic liquidity event, including an initial public offering.

These disclosures do not show what percentage of Anthropic Amazon owns or whether it has any control over Anthropic’s board.

The companies’ strongest argument is useful capacity

A January 2025 Federal Trade Commission (FTC) staff report on AI partnerships describes cloud services for AI training and operation as expensive and capital-intensive, with major providers spending billions. A partnership that supplies this capacity can meet a real need, not merely rearrange ownership.

In its April 20, 2026 announcement, Anthropic said rapid demand had strained reliability and performance for free and paid Claude users, particularly during peak hours. Anthropic said the agreement would expand available capacity within three months and deliver nearly 1 gigawatt by the end of the year.

Amazon CEO Andy Jassy says the company’s custom AI chips offer high performance at significantly lower cost for customers. Amazon also describes access to Anthropic’s Claude Platform through an existing AWS account, using the same access controls and monitoring without additional credentials, contracts or billing relationships. For a business already organized around AWS, that integration offers a different benefit from simply having another model to choose.

OpenAI and Amazon describe a Stateful Runtime Environment, a system designed to retain context and prior work while an AI application uses different software tools and data sources. The companies also describe customized OpenAI models for Amazon’s customer-facing applications, complementing Amazon’s Nova models. Their argument is that matching models to infrastructure can make applications more useful and easier to operate. These are the companies’ explanations of intended benefits, not independent findings that every promised performance gain has occurred.

A cloud commitment can make another supplier harder to choose

The FTC study examined Microsoft and OpenAI, Amazon and Anthropic, and Google and Anthropic. Its information stops at January 2025, before the agreements Amazon announced in 2026. In the partnerships it studied, FTC staff found cloud commitments that require AI developers to spend a large portion of a cloud partner’s investment on that partner’s services. The staff report calls this circular spending and says it can reduce the investor’s potential exposure to losses. For the developer, the relevant distinction is between funding it can spend wherever it chooses and funding accompanied by an obligation to buy from the investor.

A long purchasing commitment can narrow the practical value of shopping around even when another provider is technically available. That possibility does not mean the current Amazon agreements prohibit every alternative, or that a large purchase contract necessarily harms competition.

FTC staff says a developer using chips available only through a particular cloud provider may face both chip and cloud switching costs. The report describes cloud migration as potentially time- and capital-intensive, especially when a developer relies on specialized computing resources and managed services. A lower initial computing price and a higher later switching cost can coexist.

FTC staff also identified potential effects on access to computing resources and engineering talent, both for developers inside the partnerships and for those outside them. The concern is therefore not only whether the funded company gets enough capacity to grow, but whether competing developers can still get the computing and engineers they need.

The 2023 Merger Guidelines, which set out how the Justice Department and FTC investigate mergers, say limiting rivals’ access becomes more feasible when few alternative suppliers exist, or when alternatives differ in quality, price or other characteristics. Evidence about available substitutes can therefore be more revealing than the size of an announced computing purchase. A contract that brings additional capacity and preserves realistic alternatives presents a different competition question from one that leaves rivals dependent on restricted supply.

Confidential information and investment incentives create another issue

FTC staff identifies sensitive information that cloud partners may obtain, including AI development methods, confidential chip co-design, partner finances, and customer usage and revenue figures. Sharing information can help engineers build an integrated product, while commercially sensitive information can also affect how firms compete.

The merger guidelines also address partial ownership: access to a partly owned firm’s nonpublic competitive information can make it easier for the two firms to coordinate their behavior or accommodate each other, even when the investor has no control over the other firm’s decisions. That is a possible mechanism for competitive harm, not a finding that Amazon, Anthropic or OpenAI have exchanged information unlawfully.

The guidelines also explain that acquiring a minority stake in a rival can weaken an investor’s incentive to compete aggressively, because it may receive dividends or other shared revenue even when it loses business to that rival. The guidelines say this effect can arise without direct influence over the rival’s decision-making. Amazon’s own models make this an understandable question to examine, but the investment alone does not prove a reduced incentive in any particular product market.

Backing OpenAI and Anthropic is therefore neither an automatic antitrust violation nor an automatic guarantee that the two developers will compete independently. The analysis turns on the rights obtained, economic incentives and competitive effects of the actual relationships.

What U.S. antitrust law would require

The Department of Justice (DOJ) and FTC enforce federal competition laws that include the Sherman Act, Clayton Act and Federal Trade Commission Act. Section 7 of the Clayton Act addresses stock or asset acquisitions whose effect may substantially lessen competition or tend to create a monopoly. In plain terms, the acquisition question concerns a threat to competition, not whether an investment is impressive or whether a competitor dislikes it.

The Sherman Act also addresses agreements that unreasonably restrain trade, as well as monopolization and attempts or conspiracies to monopolize. The FTC explains that a partnership agreement can be lawful when its restraint is not unreasonable. These rules look at how firms behave, alone or with one another, a separate question from whether buying a stake threatens competition.

Obtaining a monopoly through superior products, innovation or business skill is lawful, according to FTC guidance, while exclusionary or predatory conduct can raise antitrust concerns.

The agencies’ Merger Guidelines apply the same competition standard to partial acquisitions as to other acquisitions, examining the parties’ relationship and incentives after the investment. For acquisitions involving an input rivals need, the guidelines examine the risk of limiting access, gaining sensitive information or discouraging rivals from investing.

The guidelines create no independent rights or obligations and say the agencies must apply their frameworks flexibly to each transaction’s facts. A sound assessment would connect specific contractual rights or conduct to effects in a defined area of competition, while considering the capacity and integration benefits the companies describe.

The Hart-Scott-Rodino premerger notification law requires certain voting-stock or asset acquisitions meeting its criteria to be reported before completion, subject to exemptions. The law’s test is the amount of voting securities and assets the buyer would hold, not whether it gains majority control. FTC guidance explains that acquiring securities convertible into voting stock is exempt from the notification requirements while they have no present voting rights. A later conversion into voting securities can require notification and a waiting period if the applicable criteria are met and no exemption applies. Whether a particular deal must be reported depends on its structure and on the law’s thresholds and exemptions, so an investment announcement does not show that a filing was required or made.

A deal that must be reported cannot be completed until a waiting period expires: ordinarily 30 days, or 15 days for specified transactions. If an agency requests additional information, the waiting period stops until both parties substantially comply. It then generally ends 30 days later, or 10 days later for cash tender offers and specified bankruptcies.

The notification statute expressly preserves later legal action even when an agency has acted, or failed to act, under that process. Expiration of a waiting period is therefore not permanent antitrust immunity.

The FTC study and the UK decision answer narrower questions

The FTC ran the study under its Section 6(b) authority, which permits wide-ranging studies without a specific law-enforcement purpose. An industry study can guide enforcement work without itself being an enforcement judgment against the companies it examines.

The staff report drew on respondent information through September 2024 and publicly available information through January 2025. It expressly disclaims any assessment of whether anyone engaged in illegal conduct, and says it is not a formal legal or economic analysis. It therefore cannot be treated as a ruling on the Amazon and OpenAI arrangements announced in February 2026.

In a January 17, 2025 concurring and dissenting statement on the study, FTC Commissioner Melissa Holyoak, joined by Commissioner Andrew N. Ferguson, emphasized AI’s potential benefits for consumers and for the effectiveness of businesses. The statement counseled caution in enforcement because agency decisions affect market incentives. Holyoak’s service as a commissioner ended on November 17, 2025. Ferguson is now the FTC chairman.

Outside the United States, the United Kingdom’s Competition and Markets Authority decided on September 27, 2024 not to refer the Amazon and Anthropic partnership for further merger investigation. The reason was a threshold one: neither its turnover test nor its share-of-supply test, which decide whether a deal qualifies for investigation, was met. That decision says the partnership fell below the UK’s thresholds for investigation at the time; it does not say whether the later agreements satisfy U.S. antitrust law.

What would change the assessment

FTC staff says it aggregated or anonymized information to protect trade secrets and confidential commercial or financial material. The public report therefore cannot supply a complete account of each company’s contract rights or internal information safeguards. It would be premature to fill those gaps with assumed board control, automatic exclusivity across every model, or an allegation of information misuse.

Several developments would change the picture: a disclosed contract term that affects switching, a public agency complaint that spells out a competition theory, or a court decision on that theory. Operational evidence would matter too: whether the promised capacity becomes available and whether competing developers retain realistic alternatives.

The DOJ Antitrust Division accepts reports of suspected competitive harm online, by mail or by phone. A business affected by a restriction can contribute concrete evidence about access or conduct, rather than relying on the scale of a funding announcement.