CoreWeave’s convertible sale closes at $4.2bn, extending its reliance on hybrid debt

CoreWeave completed a $4.2 billion convertible-bond offering, $500 million above the initially reported $3.7 billion size. The notes pay 2.875% and mature in 2033; the coupon is higher than the 1.75% on its April convertible.

The upsizing shows that investors will still fund AI infrastructure when they receive both interest and potential equity upside. For CoreWeave, convertibles are cheaper than ordinary unsecured debt, but they create dilution if the share price rises and leave a large refinancing obligation if it does not.

The final size strengthens near-term liquidity without changing the underlying timing problem: chips, buildings and power connections must be financed before customer contracts generate their full cash flow. This is a financing update to the previously covered offering, not a separate change in the company’s operating outlook.