Anthropic's IPO filing says its data center buildout leans on on-site natural gas, with uncapped fuel costs

Anthropic wants to go public. Its paperwork says the company's compute buildout will depend heavily on burning natural gas.

The S-1 registration statement filed with the Securities and Exchange Commission on Monday, Oct. 26, states that a number of planned data centers will draw power from natural gas turbines installed on site. An updated filing followed on Nov. 2. The filing is not a completed IPO. It is the disclosure document investors will use before a planned stock market debut.

Why gas

The filing calls the scramble for grid connections and well-powered sites "intense." Hyperscalers and cloud providers building their own facilities will compete for the same gas and pipeline capacity, it says, and that rivalry "could drive up the price of natural gas."

The logic is speed. Connecting a new facility to the grid can take years. Gas generation can be stood up faster than new grid capacity or renewable projects, and Anthropic acknowledges that clean alternatives may not fit the timelines it needs.

Gas already supplies roughly 40% of U.S. electricity generation.

The biggest piece

The largest gas-linked commitment described in the filing is a $45 billion, six-year agreement with Nscale for compute capacity at its Monarch campus in West Virginia. The site is designed to run on natural gas generators and targets roughly 2 gigawatts of on-site capacity. Anthropic's own share of that facility is about 460 megawatts.

A $3.4 billion figure for a gas-power deal has circulated on social media. Crypto Briefing's review of the filing found no single $3 billion or $3.4 billion contract devoted solely to gas generation. The exposure sits inside much larger compute and infrastructure contracts.

Anthropic has also committed to about $895.4 billion in future spending, most of it tied to computing and infrastructure. Last year it announced a $50 billion plan to build its own data centers in Texas and New York. Until now the company has mostly rented capacity from the big cloud providers.

The risks Anthropic lists

The filing is blunt about costs. It flags fuel and transportation expenses that are uncapped, potential supply disruptions and volatile prices. It says some projects could be postponed or abandoned if secure power and fuel cannot be guaranteed.

It also names a political risk. Local opposition to data centers has grown as residents worry about higher utility bills and grid strain, the filing says. Regulators could respond with standby charges, usage conditions or requirements that developers fund grid upgrades if data center demand is seen as burdening existing customers.

Anthropic additionally warns that higher global temperatures will raise its costs for electricity and for the water used to cool servers.

The financial backdrop

The numbers behind the buildout are large. Anthropic reported third-quarter revenue of about $17 billion, up from $11.6 billion in the second quarter and $1.4 billion a year earlier. Quarter-on-quarter growth slowed to 47% from 144%.

The company posted an operating loss of $567 million, against operating income of $974 million the previous quarter. It blamed higher computing costs, including capacity bought under short-term agreements. Its net loss was $23.3 billion, much of it an accounting charge tied to the rising value of convertible notes rather than cash spent on operations.

Longer-term infrastructure deals are meant to cut reliance on that more expensive short-term capacity.

Markets and politics

The disclosure arrived in a rough week for AI-linked stocks. On Thursday, Nov. 5, the Nasdaq Composite fell 5.52%, the S&P 500 fell 4.38%, and Nvidia lost 9.23%. For the week, the Nasdaq dropped 3.37% and the S&P 500 fell 2.68% to 7,376.

Market commentary tied the slide in part to Democratic gains in the midterm elections, which raised expectations that lawmakers and state officials could slow or restrict data center construction. David Bahnsen, chief investment officer of The Bahnsen Group, called the pullback a risk of a "blow-off top" and said it "does not represent a buying opportunity." He cited "complacency around risk and the disconnect from valuations and revenue models that make sense."

No source links any specific stock move to Anthropic's filing.

Australia

Anthropic's footprint is also moving abroad. The company has signed a lease as the first major tenant of Zerra DC's proposed $22 billion Western Downs Digital Park in Queensland, west of Brisbane. The region sits on a major gas field.

The project is not formally approved. Western Downs Mayor Andrew Smith says the decision rests with the local council and that he is waiting on advice from its planning department. He sees a chance to diversify the economy and bring young people home.

Anthropic's Australia and New Zealand policy head, David Masters, said the company is "working towards having significant capacity hosted in Australia." The Australian government is urging growth "with guardrails" amid growing public opposition to AI.

The council's decision on the Queensland site and the timing of Anthropic's listing are both still pending.