Oracle has laid off between 20,000 and 30,000 employees, approximately 18% of its global workforce, in what is believed to be the company's largest layoff in history. The layoffs were announced via a brief email sent to affected employees at 6 a.m. EST, with no prior warning or consultation. The job cuts are reportedly tied to Oracle's aggressive expansion into artificial intelligence infrastructure, which has led to a significant increase in debt. The company aims to free up $8-10 billion in cash flow to fund its AI data center buildout.