Anthropic Commits $3.4 Billion to Gas Generators Ahead of IPO

Anthropic has committed $3.4 billion to acquire 1.7 gigawatts of heavy-duty natural gas generators, the largest direct investment in power generation equipment by an AI company, according to the Financial Times. The deal secures dedicated electricity for its data center buildout months before a planned public listing that targets a $1.3 trillion valuation.

The transaction, disclosed in late September through a Piper Sandler memo naming the bank as financial advisor, transfers generator commitments that San Antonio-based equipment supplier OnePWR Solutions had previously made with Caterpillar. The arrangement also includes engineering and construction capabilities needed to install the equipment, with the generators expected to become available within two years.

What does the deal mean for the IPO?

The generator purchase lands on top of an already enormous commitment stack. Anthropic's amended S-1 registration statement, filed with the SEC in September and updated in November, discloses approximately $900.9 billion in aggregate committed spending on computing and infrastructure, including purchase commitments and lease agreements. About $451.6 billion is expected to be spent before 2030, with most remaining commitments extending through 2045. Another $70.7 billion falls due within 12 months of September 30.

The company is selling 825 million shares at a range of $70 to $78 each as it seeks the $1.3 trillion valuation. Neither Anthropic nor OnePWR responded immediately to a request for comment from Fortune.

The filing itself flags the risk embedded in the gas strategy. "As data center operators increasingly rely on natural gas-fired generation, and because behind-the-meter and on-site arrangements are feasible only in some jurisdictions given the applicable regulatory frameworks, we expect increased competition among users for the same natural gas supply and pipeline capacity in those areas," the S-1 reads.

Why is Anthropic buying power equipment directly?

The commitments reflect an effort to secure its own computing capacity rather than relying solely on suppliers such as Amazon Web Services, Google Cloud, Nvidia, and AMD. The S-1 describes a strategy called "Anthropic Direct," under which the company leases chips directly and places them in dedicated data centers built on its behalf. This separates its "commitments for data center capacity" from its "commitments for the compute infrastructure deployed inside them."

"Because data centers require longer lead times but represent a smaller fraction of total compute costs," the filing states, "this approach enables us to secure data center capacity early while deferring larger accelerator investments until our specific compute needs are more certain."

Electricity has become a binding constraint on that expansion. Anthropic warned that transformers, turbines, generators, substations, and other electrical equipment can take years to procure, as manufacturers face higher prices, tariffs, and limited production capacity. The company acknowledged it may need to purchase long-lead-time power generation at prices above market rates, and disclosed that some planned facilities rely on dedicated gas generation, exposing it to fuel supply fluctuations and pipeline capacity constraints.

Is the rest of the industry doing the same?

Anthropic's deal is the largest of its kind, but it follows a clear pattern across the sector:

• In December 2025, Alphabet acquired energy developer Intersect Power for $4.75 billion, gaining greater control over how quickly new generation comes online.
• Elon Musk's xAI turned to natural gas turbines for its Colossus data centers in Tennessee and Mississippi after existing grid connections proved insufficient.
• Meta is pursuing on-site gas generation for its Ohio campus with Williams, a project worth roughly $1.6 billion in energy generation equipment, according to the Milken Institute.
• Microsoft signed a 20-year, $16 billion agreement with Constellation Energy in September 2024 to buy power from the Three Mile Island nuclear facility in Pennsylvania.
• Amazon is building a nuclear-powered data center campus with Talen Energy adjacent to the Susquehanna plant in Pennsylvania.

"We're making the largest private sector investment in state history–$20 billion–to bring 1,250 high-skilled jobs and economic benefits to the state, while also collaborating with Talen Energy to help power our infrastructure with carbon-free energy," AWS Vice President of Global Data Centers Kevin Miller said in a Talen Energy press release.

For finance teams, the signal is straightforward: compute contracts are increasingly power contracts, and power contracts now carry the procurement risks—fuel volatility, tariffs, multi-year lead times—that historically sat with utilities, not software firms.