OpenAI has fallen short of its own revenue and user growth estimates, raising questions about whether the AI company can meet its massive data center spending plans, the Wall Street Journal reported on Monday.

Finance Chief Sarah Friar has expressed concerns over the company’s ability to fund future compute agreements if the revenue slowdown continues, the outlet reported, citing sources familiar with the matter. According to the report, Friar is working with other executives to clamp down on costs as the board of directors more closely scrutinizes OpenAI’s computing deals.

“This is ridiculous,” OpenAI CEO Sam Altman and Friar said in a joint statement to CNBC. “We are totally aligned on buying as much compute as we can and working hard on it together every day.”

Shares of chipmakers and tech companies, such as Oracle

, slumped on the report.