Amendment to Prospectus Supplement for Stardust Power Inc.

Stardust Power Inc. filed Amendment No. 1 to its Prospectus Supplement on September 17, 2026. This amendment updates the maximum number of common shares issuable under the At Market Issuance Sales Agreement with B. Riley Securities, Inc., dated May 8, 2026. The company can now issue up to an additional $8,990,537 of common stock. These shares will be issued under the company's effective registration statement on Form S-3, originally filed on April 9, 2026. The filing also includes legal opinions regarding the placement shares and is not an offer to sell or solicitation to buy any securities.