X0508 4 2025-11-25 1 0002050501 Blue Water Acquisition Corp. III BLUW 0002073165 Blue Water Acquisition III LLC 15 E PUTNAM AVENUE, SUITE 363 GREENWICH CT 06830 0 0 1 0 0 Class A ordinary shares 2025-11-25 4 S 0 430000 D 430000 D Class B ordinary shares 2025-11-25 4 J 0 6325000 D Class A Ordinary Shares 6325000 0 D Warrants to purchase Class A ordinary shares 2025-11-25 4 J 0 215000 D Class A ordinary shares 215000 0 D In connection with the Purchase Agreement, dated as of November 25, 2025, by and among the Issuer, Blue Water Acquisition III LLC (the "Original Sponsor") and Yorkville BW Acquisition Sponsor, LLC (the "New Sponsor"), the Original Sponsor sold to the New Sponsor an aggregate of 6,325,000 Class B ordinary shares (the "Founder Shares") and 430,000 private placement units (the "Private Placement Units"), consisting of 430,000 Class A ordinary shares and 215,000 warrants to purchase Class A ordinary shares of the Issuer (the "Private Placement Warrants"). The New Sponsor purchased the Founder Shares and Private Placement Units for an aggregate purchase price of $7,200,000. The Class B ordinary shares have no expiration date and will automatically convert into Class A ordinary shares at the time of the Issuer's initial business combination, or earlier at the option of the holder, on a one-for-one basis. Represents securities included in the 430,000 Private Placement Units. Each whole Private Placement Warrant entitles the holder thereof to purchase one Class A ordinary share for $11.50 per share, subject to adjustment. The Private Placement Warrants will become exercisable at the later of 12 months from the closing of the Issuer's initial public offering and 30 days after the completion of its initial business combination and will expire five years after the completion of the initial business combination or earlier upon redemption or liquidation. Signed by the Managing Member of Blue Water Acquisition III LLC /s/ Joseph Hernandez 2025-11-28