Oracle has reportedly delayed some of its data center projects set for OpenAI workloads by as much as a year.

The company made the move to delay projects from 2027 to 2028, Bloomberg reports, mostly due to labor and material shortages. The company, however, has denied these reports.

OpenAI has signed a record $300 billion contract with Oracle for cloud services over five years, with the contract starting in 2027.

Oracle is also a backing Stargate, the OpenAI joint venture which currently has one operational data center in Texas. The Abilene facility was built by Crusoe (which is expanding the site), and operated by Oracle for OpenAI.

Other Stargate projects involving Oracle include Vantage's Stargate Wisconsin site, Related Digital’s 1GW Michigan data center, and the UAE-US AI Campus. Those Stargate data centers will be part of the larger cloud contract when it comes into force.

Which data centers were delayed was not disclosed. OpenAI did not comment on the news.

“We have ambitious achievable goals for capacity delivery worldwide,” Oracle co-CEO Clay Magouyrk said on an earnings call this week, which saw the company's share price drop 15 percent on concerns about its debt-backed AI capex spend.

Shares fell another four percent on news of the delay.

Oracle has denied the reports.

"There have been no delays to any sites required to meet our contractual commitments, and all milestones remain on track," Oracle spokesperson Michael Egbert told Reuters in an emailed statement.