Company: BLUWU
Filing Date: 2025-06-09
Form Type: 8-A12B
Source: 0001641172-25-014317
Chunk: 0

Company: Blue Water Acquisition Corp. III
Filing Date: 2025-06-09
Form: 8-A12B
Chunk 0
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<div align='center'>UNITED STATES
SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-A

FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES
PURSUANT TO SECTION 12(b) OR (g) OF THE

SECURITIES EXCHANGE
ACT OF 1934

Blue Water Acquisition Corp. III

(Exact name of registrant
as specified in its charter)</div>

| Cayman                          
 Islands                         |     | 33-2301550         |
| (State or other jurisdiction of 
 incorporation or organization)  |     | -I.R.S Employer    
 Identification No. |

| 15 E. Putnam Avenue                      |     |           |
| Suite 363                                |     |           |
| Greenwich, CT                            |     |     06830 |
| (Address of principal executive offices) |     | -Zip Code |

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

| Title of each class                                                  
 to be registered                                                     |     | Name of each exchange on which 
 each class is to be registered |
| Units, each consisting of one Class A ordinary share and one-half    
 of one redeemable warrant                                            |     | The Nasdaq Stock Market LLC    |
| Class A ordinary shares, par value $0.0001 per share                 |     | The Nasdaq Stock Market LLC    |
| Warrants entitling the holder to purchase one Class A ordinary share 
 at a price of $11.50 per share                                       |     | The Nasdaq Stock Market LLC    |

If this form relates to the registration
of a class of securities pursuant to Section 12(b) of the Exchange Act and is effective pursuant to General Instruction A.(c) or (e),
check the following box. ☒

If this form relates to the registration
of a class of securities pursuant to Section 12(g) of the Exchange Act and is effective pursuant to General Instruction A.(d) or (e),
check the following box. ☐

If this form relates to the registration
of a class of securities concurrently with a Regulation A offering, check the following box. ☐

Securities
Act registration statement or Regulation A offering statement file number to which this form relates: 333-285075

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

<div align='center'>N/A

(Title of class)

(Title of class)