Anthropic warned in its S-1 that natural gas supply and pricing could delay or derail parts of its data center buildout, Wired reported. Some of its planned facilities rely on dedicated on-site gas-fired generation.

The company bears fuel and related costs “on a pass-through basis without cost caps,” the filing said, leaving it exposed to increases in the price of natural gas and its transportation. The sites also face constraints on pipeline capacity and firm fuel transportation.