# EDGAR Filing Document

**Accession Number:** 0001598384
**File Stem:** 0001493152-25-025414
**Filing Date:** 2025-11
**Character Count:** 7857
**Document Hash:** 0186b2d87273c54d4c24efb0505cfe64
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001493152-25-025414.hdr.sgml**: 20251128

**ACCESSION NUMBER**: 0001493152-25-025414

**CONFORMED SUBMISSION TYPE**: 4

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20251125

**FILED AS OF DATE**: 20251128

**DATE AS OF CHANGE**: 20251128

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** Hernandez Joseph
- **CENTRAL INDEX KEY:** 0001598384

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-42692
- **FILM NUMBER:** 251536422

**MAIL ADDRESS:**
- **STREET 1:** C/O MICROLIN BIO, INC.
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10022
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Blue Water Acquisition Corp. III
- **CENTRAL INDEX KEY:** 0002050501
- **STANDARD INDUSTRIAL CLASSIFICATION:** BLANK CHECKS [6770]
- **ORGANIZATION NAME:** 05 Real Estate & Construction
- **EIN:** 000000000
- **FISCAL YEAR END:** 1231

**BUSINESS ADDRESS:**
- **STREET 1:** 15 E. PUTNUM AVENUE
- **STREET 2:** SUITE 363
- **CITY:** GREENWICH
- **STATE:** CT
- **ZIP:** 06830
- **BUSINESS PHONE:** 646-303-0737

**MAIL ADDRESS:**
- **STREET 1:** 15 E. PUTNUM AVENUE
- **STREET 2:** SUITE 363
- **CITY:** GREENWICH
- **STATE:** CT
- **ZIP:** 06830

### UNITED STATES SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## FORM 4

### STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

[x] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

[ ] Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>Hernandez Joseph<br><sub>(Last) (First) (Middle)</sub><br>C/O BLUE WATER ACQUISITION CORP. III<br>15 E PUTNAM AVENUE, SUITE 363<br><sub>(Street)</sub><br>GREENWICH, CT 06830<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2025-11-25 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[X] Director [X] 10% Owner<br>[X] Officer (give title below) [ ] Other (specify below)<br>_Chief Executive Officer_ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>Blue Water Acquisition Corp. III [ BLUW ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[X] Form filed by One Reporting Person<br>[ ] Form filed by More than One Reporting Person |

---

## Table I - Non-Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | 3. Transaction Code (V) | 3. Transaction Code (V) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | Code | V | Amount | (A) or (D) | Price | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| Class A ordinary shares<sup>(4)</sup> | 2025-11-25 |  | S |  | 430000 | D | <sup>(1)</sup> | 430000 | I | See Footnote<sup>(2)</sup> |

---

## Table II - Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | 4. Transaction Code (V) | 4. Transaction Code (V) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 6. Date Exercisable and Expiration Date | 6. Date Exercisable and Expiration Date | 7. Title and Amount of Underlying Securities | 7. Title and Amount of Underlying Securities | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | Code | V | (A) | (D) | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| Class B ordinary shares | <sup>(3)</sup> | 2025-11-25 |  | J |  |  | 6325000 | <sup>(3)</sup> | <sup>(3)</sup> | Class A Ordinary Shares | 6325000 | <sup>(1)</sup> | 0 | I | See Footnote<sup>(2)</sup> |
| Warrants to purchase Class A ordinary shares<sup>(4)</sup> | <sup>(5)</sup> | 2025-11-25 |  | J |  |  | 215000 | <sup>(5)</sup> | <sup>(5)</sup> | Class A ordinary shares | 215000 | <sup>(1)</sup> | 0 | I | See Footnote<sup>(2)</sup> |

---

### Footnotes:

(1) 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.

(2) The securities are held directly by the Original Sponsor. The Reporting Person is a managing member of the Original Sponsor, therefore, he may be deemed to have beneficial ownership of the securities held directly by the Original Sponsor. The Reporting Person disclaims beneficial ownership of such shares, except to the extent of his pecuniary interest therein.

(3) 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.

(4) Represents securities included in the 430,000 Private Placement Units.

(5) 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.

**Signature:** /s/ Joseph Hernandez  
**Date:** 2025-11-28

### Remarks:

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.

**Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.**