UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): December 26, 2025

Blue Water Acquisition Corp. III

(Exact name of Registrant as Specified in Its Charter)

Cayman Islands 001-42692 33-2301550
(State or Other Jurisdiction
of Incorporation)
(Commission File Number) (IRS Employer
Identification No.)
1012 Springfield Avenue
Mountainside, New Jersey 07092
(Address of Principal Executive Offices) (Zip Code)

Registrant’s Telephone Number, Including Area Code: (201) 985-8300

15 E. Putnam Avenue, Suite 363

Greenwich, CT 06830

(Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

¨ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
¨ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
¨ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
¨ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class Trading
Symbol(s)
Name of each exchange
on which registered
Units, each consisting of one Class A ordinary share, par value $0.0001 per share, and one-half of one redeemable warrant BLUWU The Nasdaq Stock Market LLC
Class A ordinary shares, $0.0001 par value BLUW The Nasdaq Stock Market LLC
Warrants, each whole warrant exercisable for one Class A ordinary share at an exercise price of $11.50 per share BLUWW The Nasdaq Stock Market LLC

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company x

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ¨

Item 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

On December 26, 2025, the Board of Directors (the “Board”) of Blue Water Acquisition Corp. III, a Cayman Islands exempted company (the “Company”), approved the payment by the Company of a monthly advisory fee of $15,000 payable to the Company’s Chief Executive Officer, Kevin McGurn, in connection with identifying, investigating, negotiating and completing the Company’s initial business combination and related matters. The advisory fee is effective as of December 2025 and will continue on a monthly basis until the earlier of (i) the closing and completion of the Company’s initial business combination and (ii) the liquidation of the Company.

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 hereunto duly authorized.

BLUE WATER ACQUISITION CORP. III
By: /s/ Troy Rillo
Name: Troy Rillo
Chief Financial Officer

Date: December 31, 2025