NEBIUS (NBIS) experienced a significant intraday surge, with its stock price soaring by 5.00% during Wednesday's trading session.

The sharp upward movement follows the company's announcement that it has priced an upsized private offering of $4.0 billion in convertible senior notes. The offering was increased from a previously announced size of $3.75 billion, comprising $2.25 billion of notes due 2031 and $1.75 billion of notes due 2033.

Nebius Group plans to use the net proceeds, estimated at approximately $3.96 billion, to fund data center construction and build-outs, invest in its full-stack AI cloud platform, expand its data center footprint, and procure key components including GPUs. The successful pricing and upsizing of this substantial capital raise appears to have driven positive investor sentiment and contributed to the stock's strong performance.