Generac stock jumps 33% after Amazon takes equity stake tied to $8 billion data center generator deal

Generac Holdings, the Wisconsin-based maker of backup generators long associated with suburban storm outages, disclosed Tuesday that it has struck a multibillion-dollar supply agreement with Amazon to provide power equipment for the retailer's data centers — a deal structured so that Amazon receives an equity stake in Generac as it buys. The arrangement, filed with the Securities and Exchange Commission, sent Generac shares soaring in after-hours trading and marked the second time this month that Amazon has taken warrants in a hardware supplier as part of an infrastructure deal tied to artificial intelligence.

Under the transaction agreement disclosed in Generac's filing, the company issued a warrant to an Amazon subsidiary, Amazon.com NV Investment Holdings LLC, allowing it to acquire up to 1,693,745 shares of Generac common stock at an exercise price of $200.9266 apiece. The companies simultaneously signed a separate, long-term supply agreement under which Generac will provide backup power generators for Amazon's data centers, with initial deliveries expected to total $2.4 billion in 2027 and 2028.

The numbers

The warrant itself vests in stages. Of the 1.69 million shares covered, 307,954 vested immediately upon signing. The rest vest in tranches tied to how much Amazon and its affiliates actually pay Generac for generators, up to a cumulative ceiling of $8 billion — a figure that represents the outer limit of a multiyear commercial relationship rather than a guaranteed order book. At current prices, the full warrant would be worth roughly $340 million, equal to close to 3% of Generac's shares outstanding.

Investors reacted immediately. Generac shares closed the regular session Wednesday at $175.11, essentially flat on the day, before the filing became public after the closing bell. In extended trading, the stock jumped as much as 45%, before settling around $233 a share — a gain of roughly 33% from the close, according to trading data compiled after the announcement. That move alone added more than $3 billion to Generac's market value, which stood near $10.3 billion before the news. The stock remains below its 52-week high of $296.44, set earlier in the year, but well above its 52-week low of $134.80.

How Generac got here

Generac has spent more than six decades making generators for homes and small businesses, expanding after Hurricane Sandy and subsequent grid outages made backup power a mainstream purchase. In the past two years the company has pushed harder into industrial-scale "standby" generators aimed at hospitals, telecom carriers and increasingly, data centers, betting that the buildout of cloud and artificial-intelligence infrastructure would require far more on-site backup capacity than utilities can guarantee.

That bet has started to pay off as hyperscale operators run into grid constraints. Amazon Web Services has filed permit applications in multiple states for large fleets of emergency diesel generators to backstop new data centers, including a proposal for 105 units in Dublin and, in Minnesota, a request for 250 diesel generators with a combined capacity of roughly 600 megawatts at a planned campus in Becker. Regulators have not simply waved the requests through — Minnesota's Public Utilities Commission ruled that Amazon must obtain a state certificate of need for the Becker generators rather than claim an exemption, a decision that underscored how contentious the diesel buildout has become even as demand accelerates.

Generac has been positioning itself as a beneficiary of that demand for months. In June, when it announced a similar supply agreement with an unnamed "leading hyperscale data center operator," the company's chairman and chief executive framed the shift explicitly.

"This agreement positions Generac at the heart of supporting essential services and the digital economy," Aaron Jagdfeld, Generac's chairman, president and chief executive, said in that June announcement. "The successful navigation of this approval process solidifies our position as a top-tier supplier of large megawatt backup power generators."

The Amazon warrant is also part of a broader pattern in how Amazon is financing its AI infrastructure buildout. Earlier this month, Qualcomm disclosed in its own SEC filing that it had issued Amazon a warrant for 25 million Qualcomm shares, worth roughly $4 billion, tied to a custom AI chip agreement that could see Amazon spend up to $60 billion with the chipmaker. In both cases, Amazon extracted an equity stake from a supplier in exchange for locking in long-term purchase commitments — a structure that lets Amazon capture some of the stock-price upside its own orders help generate, while giving suppliers a large, visible customer to point to when raising capital or reassuring investors about revenue visibility.

Who is affected, and what happens next

For Generac, the deal validates a strategic pivot away from its historically weather-driven, residential-generator business toward steadier, contracted industrial revenue. The company's second-quarter results already showed the shift underway, with revenue climbing on stronger demand from commercial and industrial customers even as home-generator sales normalized after a run of severe storm seasons. Shareholders who had watched the stock languish well below its highs saw the fastest one-day value creation in the company's history as a public company.

For Amazon, the arrangement is another data point in its effort to secure the physical infrastructure — chips, power, cooling — needed to keep expanding AWS data centers at the pace its cloud and AI customers are demanding, following moves such as its cloud-computing agreement with OpenAI and its investment tied to an Anthropic data-center campus. It also puts Amazon in the position of holding equity stakes across a widening set of industrial and semiconductor suppliers, a departure from its traditional role as a pure customer.

The deal is likely to draw continued scrutiny from state regulators overseeing where and how those generators are permitted to run, particularly in states that require utilities-style review of large power installations. Neither company disclosed which specific data-center sites the new Generac units will serve, and Generac's stock, up sharply but still trading well below its 52-week high, will face a test in coming quarters as investors look for the promised order flow — starting with the $2.4 billion in deliveries scheduled for 2027 and 2028 — to actually materialize into revenue.