Shares of Nebius Group plunged 12.8% to $216.52 on August 19 after the Amsterdam-based AI cloud company announced a proposed $4.5 billion private offering of convertible senior notes — bonds that can eventually be swapped for stock. The offering consists of two series: $2.75 billion in notes due 2030 and $1.75 billion in notes due 2034.

The announcement immediately raised fears of future share dilution, prompting investors to trim positions in a stock that had already run sharply higher.

  • This Isn't Nebius's First Giant Debt Raise — It's the Third in a Year. Nebius's aggressive financing — including a $1 billion equity offering and $2 billion convertible notes — has reminded investors that hypergrowth requires hyper-scale capital. In March 2026, the company closed a separate $4.3 billion convertible deal, and in July it added a $775 million secured facility. According to Nebius Group's latest financial reports the company's total debt is $9.49 billion. Today's offering could push that figure toward $14 billion, a staggering sum for a firm with quarterly revenue still under $600 million.

  • Blockbuster Growth Numbers Haven't Calmed Wall Street's Nerves. In Q2, Nebius grew group revenue by 454% to $582 million, with adjusted EBITDA margin expanding to 41%.

Management reaffirmed its full-year 2026 guidance, projecting revenue of $3 billion–$3.4 billion, a 40% EBITDA margin, and capital expenditures between $20 billion and $25 billion. But converting revenue growth into enough cash to service this much debt is a question the market is clearly not done pricing in.

  • Dilution Risk Keeps Repeating the Same Playbook. Nebius has a recent precedent for this type of reaction — a comparable convertible offering in March 2026 triggered a roughly 10% single-session decline on similar dilution concerns. Convertible notes give bondholders the right to exchange debt for shares; the more notes outstanding, the more existing shareholders' ownership gets watered down if conversion happens. The total number of shares issued and outstanding as of June 30, 2026 was 271,855,218. Each new round adds to the overhang.

  • The Cash Burn Dwarfs Even the Fundraising. Capital expenditures hit approximately $5.7 billion in Q2 alone, driven primarily by GPU purchases and data center expansion.

The company ended the period with $8 billion in cash. Against a $20–$25 billion full-year spending plan, today's raise buys runway but not certainty. Nebius needs growth driven by software to surpass its requirements for hardware funding. Until this happens, valuation will stay heavily linked to credit conditions.