May 17 (Reuters) - Specialized cloud services provider CoreWeave is raising $7.5 billion in debt from financiers led by Blackstone and Magnetar to expand its infrastructure to meet rising artificial intelligence (AI) workloads, it said on Friday.

The deal is one of the largest debt financing rounds for a startup and adds firepower to CoreWeave's balance sheet as it looks to expand its cloud computing services to more customers.

The Nvidia-backed company has raised more than $12 billion in equity and debt investments over the past 12 months, including a $1.1 billion series C investment led by private equity firm Coatue earlier this month.

"The caliber of investors in this large debt financing round is a powerful testament to ... the insatiable market appetite for AI infrastructure," CEO and co-founder Michael Intrator said in a statement.

Coatue, Carlyle, CDPQ, DigitalBridge Credit, funds managed by BlackRock, Eldridge Industries and Great Elm Capital Corp were also part of CoreWeave's latest debt raise.

CoreWeave has seen a boost from businesses rapidly adopting generative AI technology. It has partnerships with AI startups and competing cloud providers to build clusters to power AI workloads.

(Reporting by Yuvraj Malik and Priyanka G in Bengaluru; Editing by Devika Syamnath)