Anthropic's IPO Filing Shows Heavy Reliance on Natural Gas for Its Data Centers

Anthropic's filing with the US Securities and Exchange Commission, submitted Monday as the company prepares to go public, makes plain how much its AI infrastructure depends on natural gas. The S-1 describes data centers that increasingly run on the fuel, which is primarily methane, and warns that this leaves the company exposed to rising fuel prices and existing supply chain constraints.

The document also points to an awkward contradiction. Anthropic says rising global temperatures, which result in part from burning fossil fuels, will push up its operating costs. As temperatures climb, the company expects to pay more for electricity and for the water used to cool servers.

"Competition for access to electrical supply and data center locations with adequate power availability is intense," Anthropic states in the filing. It adds that some of its planned data centers depend on electricity from natural gas turbines located on site. The company leases capacity from hyperscalers, and last year it announced a $50 billion plan to expand data centers in Texas and New York.

The broader picture is one of fast-growing demand. The United States, the global center of data center activity, is planning more fossil fuel generation capacity than it has in a decade. Donald Trump's administration has sought to end renewable energy projects and has shaped regulation in favor of fossil fuels, which Trump argues are more important than intermittent solar and wind for powering data centers around the clock.

A shortage of gas turbines is now slowing construction. Some developers are installing gas engines on site to avoid long waits for grid connections. Others are turning to simpler turbine technology because manufacturers have backlogs, which makes on-site generation less efficient and more polluting. One recent Texas-based study found that data center electricity demand could erase decades of air quality gains over the next five years, raising levels of soot, smog-forming pollutants and carbon dioxide.

Anthropic expects competition for gas and pipeline capacity to grow as hyperscalers and cloud providers rush to build their own facilities. "This competition could drive up the price of natural gas," the company notes. Gas already supplies the largest share of US electricity, at 40 percent of national generation, and Americans are feeling higher costs as utilities upgrade infrastructure to meet rising demand.

Public opposition is another risk. Residents across the country have blocked dozens of proposed data centers, and Anthropic acknowledges that fears of larger utility bills can derail a project. "If our efforts to secure electrical power are perceived to affect other utility customers and the broader grid, regulators may impose conditions, standby charges, or other requirements intended to address such impacts," the filing says.

If regulators require developers to cover more of the cost of new energy infrastructure, Anthropic says its operating costs could rise further. Without a secure gas supply and the pipelines to carry it, the company says it might have to delay or abandon planned data center projects.

The filing concludes that these pressures could limit growth. It says any failure to secure adequate electrical power, any legal or regulatory change restricting electricity availability, or any significant increase in energy or compliance costs could adversely affect its cost structure and limit its ability to scale compute infrastructure, develop and deploy its models, and serve customers.