Blue Water Acquisition Corp. III 10-Q

Item 5. Other Information. N o n e . Item 6. Exhibits. The following exhibits are filed as part of, or incorporated by reference into, this Quarterly Report. ​ ​ ​ Exhibit No. ​ ​ ​ Description ​ ​ ​ 31.1* ​ Certification of the Principal Executive Officer Pursuant to Securities Exchange Act Rules 13a-14(a) and 15(d)-14(a), as adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 31.2* ​ Certification of the Principal Financial Officer Pursuant to Securities Exchange Act Rules 13a-14(a) and 15(d)-14(a), as adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 32.1** ​ Certification of the Principal Executive Officer Pursuant to 18 U.S.C. Section 1350, as adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 32.2** ​ Certification of the Principal Financial Officer Pursuant to 18 U.S.C. Section 1350, as adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 101. INS* ​ XBRL Instance Document 101.CAL* ​ XBRL Taxonomy Extension Calculation Linkbase Document 101.SCH* ​ XBRL Taxonomy Extension Schema Document 101.DEF* ​ XBRL Taxonomy Extension Definition Linkbase Document 101.LAB* ​ XBRL Taxonomy Extension Labels Linkbase Document 101.PRE* ​ XBRL Taxonomy Extension Presentation Linkbase Document 104 ​ Cover Page Interactive Data File (formatted as inline XBRL and contained in Exhibit 101) * Filed herewith ** Furnished herewith ​ 30 Table of Contents SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized. ​ Blue Water Acquisition Corp. III ​ ​ ​ May 15, 2026 By: /s/ Kevin McGurn ​ Name: Kevin McGurn ​ Title: Chief Executive Officer (Principal Executive Officer) ​ ​ ​ May 15, 2026 By: /s/ Troy Rillo ​ Name: Troy Rillo ​ Title: Chief Financial Officer (Principal Financial Officer and Principal Accounting Officer) ​ ​ 31