Akamai stock had been treading water for months. On Thursday, it jumped nearly 20% in a single session, its best day in years, after the company announced something almost nobody saw coming: Anthropic had agreed to pay it $11.6 billion over the next seven years for cloud computing capacity, a deal more than six times larger than an earlier $1.8 billion arrangement between the two companies that Bloomberg had reported back in May.

It's the largest contract in Akamai's history, according to Bloomberg's reporting on the deal, and it arrives with an unusual sweetener attached: a warrant giving Anthropic the right to buy up to roughly 5% of Akamai's outstanding shares, the first time Akamai has ever attached equity to a cloud services contract.

What Anthropic is actually buying

The deal covers two so-called Project Plans signed September 18, 2026, under an existing master services agreement between the companies dating back to May 5, according to Akamai's Form 8-K filing with the SEC. Each project plan carries an initial seven-year term, and together they represent Anthropic's committed spending on what the companies describe as CPU workloads, the general-purpose processing power needed to run code, browse the web, and increasingly, power the kind of AI agents that need to interact with tools and websites the way a person would.

That focus on CPUs rather than the GPUs typically associated with AI training makes this deal notably different from the headline-grabbing chip deals that have dominated AI infrastructure news over the past two years. TechCrunch described it as a bet on a less-hyped corner of AI infrastructure, one driven by growing demand as AI agents take on more of the kind of general computing tasks CPUs, not specialized AI accelerators, are built to handle.

An agreement built to grow, not just be signed once

The headline $11.6 billion figure isn't necessarily the ceiling. According to Akamai's own press release, the agreement carries an option to expand by an additional $9 billion, which would bring the total potential commitment to approximately $20 billion over the contract's life. That structure gives both companies room to scale the relationship as Anthropic's compute needs grow, rather than locking in a fixed commitment that would need to be renegotiated from scratch.

The deal isn't unconditional, either. Akamai's SEC filing notes the full $11.6 billion commitment depends on the company meeting specific delivery and service-availability requirements, and either party retains the ability to terminate the agreement under certain conditions, according to TechCrunch's reporting. That's a standard structure for a contract of this size, but it's a meaningful caveat: the headline number represents Anthropic's committed ceiling, not a guaranteed payment regardless of performance.

The equity stake that makes this deal unusual

What genuinely sets this agreement apart from a typical enterprise cloud contract is the warrant. Akamai issued Anthropic the right to purchase non-voting convertible Series B Preferred Stock representing 7.7 million shares of common stock on an as-converted basis, roughly 5% of Akamai's total shares outstanding, at an exercise price of $111.33 per share, according to the company's own announcement and confirmed by the underlying SEC filing.

The vesting structure ties the equity directly to how much Anthropic actually spends. Roughly 2% of Akamai's outstanding stock is expected to vest immediately in connection with Thursday's $11.6 billion commitment, while the remaining approximately 3% vests incrementally as Anthropic commits additional tranches, with each additional $3 billion in cloud services purchases unlocking roughly another 1% of equity, according to Akamai's press release. That structure effectively aligns Anthropic's financial incentive with actually using and expanding the service, rather than simply signing a contract and walking away.

Why Akamai's CEO is framing this as a turning point

Dr. Tom Leighton, Akamai's co-founder and CEO, tied the deal directly to the company's broader positioning in the AI infrastructure race. He said he was thrilled Akamai had been chosen by Anthropic to help advance what he called the "AI revolution," according to Neowin's coverage of his comments, pointing to Akamai's track record of helping customers meet business-critical goals as the reason for the expanded partnership.

That framing matters for how investors are likely reading this deal. Akamai has spent years building its identity around content delivery and cybersecurity rather than AI infrastructure specifically, and this contract, on top of the more than $2.8 billion in other multi-year Cloud Infrastructure Services commitments the company has announced across its customer base this year, signals a deliberate pivot toward positioning Akamai's distributed network as a serious player in the broader AI compute buildout.

The costs Akamai is taking on to deliver

Landing a deal this size isn't free for Akamai either. The company said the agreement has no impact on its 2026 revenue guidance, but it does expect to increase capital expenditures by approximately $1.7 billion in 2026 specifically to secure supply chain components, including memory, according to reporting from Quartz. Total capital expenditures tied to fulfilling the $11.6 billion commitment are estimated at roughly $5.5 billion, a substantial investment the company will need to make well ahead of collecting the full contract value over its seven-year term.

Akamai also moved quickly to line up the hardware side of that buildout, entering a separate supply agreement with Lenovo on September 23, one day before the Anthropic announcement, according to Quartz's reporting, a sequencing that suggests the two deals were negotiated in tandem as part of the same broader infrastructure push.

What this signals about the AI compute market broadly

Anthropic's willingness to commit up to $20 billion to a single infrastructure partner, on top of its existing compute relationships with other providers, underscores just how much capital the current generation of AI companies is deploying to secure processing capacity years in advance. That kind of long-term, large-scale commitment gives suppliers like Akamai unusual visibility into future revenue, which helps explain why the market reacted so sharply to Thursday's announcement.

It's also a reminder that not every major move in financial markets this week has come from central banks or bond auctions. Away from the bond market volatility and rate speculation that's dominated recent headlines, corporate dealmaking, whether it's an activist investor pushing for change at a construction materials firm like Knife River or a hyperscale AI compute agreement like this one, continues to move individual stocks by tens of percentage points in a single session, often on news that has little to do with the macroeconomic backdrop investors have spent the year fixated on.

What comes next for both companies

With roughly 2% of Akamai's equity set to vest immediately and the rest tied to future spending milestones, Anthropic's stake in Akamai will grow only if the partnership actually scales the way both companies are projecting. For Akamai shareholders, that creates a genuinely interesting alignment: Anthropic now has direct financial incentive, beyond just contractual obligation, to keep expanding its use of Akamai's infrastructure toward that full $20 billion ceiling.

Whether Thursday's 20% jump holds or fades as the market digests the capital expenditure commitments Akamai is taking on to deliver this contract will likely become clearer over the coming weeks, as more analysts weigh in on how the deal's cash flow timing balances against its near-term spending requirements. For now, it stands as one of the more unusual structures to emerge from this year's wave of AI infrastructure dealmaking, a cloud contract that doubles as an equity stake, built explicitly to reward growth on both sides of the table.