Nebius Loses $4.3 Billion in Market Value as Convertible Offering Fuels Dilution Fears

Nebius Group shares fell sharply Wednesday after the AI infrastructure company proposed another multibillion dollar convertible note offering, raising concerns about future dilution, additional debt and hedge related selling.

NBIS dropped 6.35% to approximately $232.66 shortly after the Nasdaq opened, down from Tuesday’s $248.43 close. Using Nebius’s total reported Class A and Class B shares outstanding, the decline erased an estimated $4.29 billion from the company’s market value.

The company plans to offer $4.5 billion of convertible senior notes, subject to market and other conditions. The proposed sale includes $2.75 billion of notes due in 2030 and $1.75 billion due in 2034.

Initial purchasers would also receive options to acquire another $675 million of notes, potentially increasing the total principal amount to $5.175 billion. Nebius intends to use the proceeds to expand its data centers, computing capacity and broader AI infrastructure platform, according to Reuters.

Why Is Nebius Stock Down Today?

The immediate concern is not confirmed dilution but the possibility of dilution in the future.

Convertible notes begin as debt and may later be converted into shares if specified conditions are met. The eventual effect on shareholders will depend on the conversion price, conversion premium, settlement method and other terms established when the offering is priced.

The financing can also create immediate technical pressure. Convertible-bond investors frequently short the underlying stock to hedge their exposure while purchasing the notes a strategy known as convertible arbitrage. That activity can increase selling while an offering is marketed.

The notes would also add interest and repayment obligations if they are not converted. Final coupons and conversion prices had not been announced at the time of writing.

March Financing Makes Investors More Sensitive

The proposed offering comes only five months after Nebius completed another major convertible note sale.

In March, the company raised approximately $4.34 billion through 1.25% notes due in 2031 and 2.625% notes due in 2033.

Those notes carried initial conversion prices of approximately $183.22 and $180.31 per share, respectively both below Wednesday’s early trading price. That does not mean conversion is immediate or guaranteed because conversion rights remain subject to contractual conditions. However, it makes the potential share-count impact of Nebius’s previous financing more relevant to investors.

Nebius said the March proceeds would fund data-center construction, GPU purchases and expansion of its full-stack AI cloud.

Nebius Loses Approximately $4.3 Billion in Market Value

Nebius closed Tuesday at $248.43 and traded near $232.66 at approximately 9:32 a.m. ET Wednesday.

The company reported 238,400,165 Class A shares and 33,455,053 Class B shares outstanding as of June 30, for a combined total of 271,855,218 shares.

Using that total:

($248.43 − $232.66) × 271,855,218 = approximately $4.29 billion

That calculation reduces Nebius’s implied equity value from roughly $67.54 billion to $63.25 billion.

At Wednesday’s early intraday low of $229.70, the estimated market-value decline temporarily reached approximately $5.09 billion. These figures are estimates and will fluctuate with the share price.

The Decline Is Not a New Earnings Warning

Nebius did not announce an earnings deterioration or guidance reduction alongside the proposed financing.

The company recently reported second-quarter revenue of $582.3 million, representing 454% year-over-year growth. Adjusted EBITDA improved to a positive $236.2 million, compared with a $21 million loss one year earlier.

However, that growth requires substantial investment. Nebius reported approximately $5.66 billion in purchases of property, equipment and intangible assets during the quarter.

The new financing could accelerate the company’s capacity expansion, but it also highlights how much outside capital is required to compete in AI cloud infrastructure.

Nebius Tokenized Stock Also Falls

Nebius’s tokenized bStock, NBISB, followed the underlying shares lower.

At the time of review, CoinGecko showed NBISB near $238.39, down approximately 11.9% over 24 hours. Its circulating token market capitalization was approximately $8.8 million, with about $4.6 million in reported 24-hour trading volume.

The token’s market capitalization represents only the value of circulating NBISB tokens. It should not be confused with Nebius Group’s corporate equity value.

NBISB can also temporarily trade above or below Nasdaq-listed NBIS because cryptocurrency venues operate different order books and use rolling 24-hour performance calculations.

What Comes Next for NBIS?

The immediate pressure on Nebius stock is tied primarily to financing risk rather than evidence of weakening AI demand.

Investors will now focus on the notes’ final interest rates, conversion prices, conversion premiums and settlement provisions. A high conversion premium could reduce perceived dilution risk, while unfavorable pricing or additional capital raises could keep the shares volatile.

Nebius is raising money to support rapid expansion. Wednesday’s reaction shows that investors are increasingly scrutinizing not only how quickly the company can grow, but also how much that growth could cost existing shareholders.