# EDGAR Filing Document

**Accession Number:** 0002000410
**File Stem:** 0001213900-26-070826
**Filing Date:** 2026-6
**Character Count:** 11521
**Document Hash:** 03da5a25453f09451ea62de275332425
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001213900-26-070826.hdr.sgml**: 20260623

**ACCESSION NUMBER**: 0001213900-26-070826

**CONFORMED SUBMISSION TYPE**: 425

**PUBLIC DOCUMENT COUNT**: 2

**FILED AS OF DATE**: 20260623

**DATE AS OF CHANGE**: 20260623

**SUBJECT COMPANY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Eureka Acquisition Corp
- **CENTRAL INDEX KEY:** 0002000410
- **STANDARD INDUSTRIAL CLASSIFICATION:** WATER TRANSPORTATION [4400]
- **ORGANIZATION NAME:** 01 Energy & Transportation
- **EIN:** 000000000
- **STATE OF INCORPORATION:** E9
- **FISCAL YEAR END:** 0930

**FILING VALUES:**
- **FORM TYPE:** 425
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-42152
- **FILM NUMBER:** 261108853

**BUSINESS ADDRESS:**
- **ADDRESS IS A NON US LOCATION:** YES
- **STREET 1:** 14 PRUDENTIAL TOWER
- **CITY:** SINGAPORE
- **PROVINCE COUNTRY:** U0
- **ZIP:** 049712
- **BUSINESS PHONE:** 1 949 899 1827

**MAIL ADDRESS:**
- **ADDRESS IS A NON US LOCATION:** YES
- **STREET 1:** 14 PRUDENTIAL TOWER
- **CITY:** SINGAPORE
- **PROVINCE COUNTRY:** U0
- **ZIP:** 049712
**FILED BY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Eureka Acquisition Corp
- **CENTRAL INDEX KEY:** 0002000410
- **STANDARD INDUSTRIAL CLASSIFICATION:** WATER TRANSPORTATION [4400]
- **ORGANIZATION NAME:** 01 Energy & Transportation
- **EIN:** 000000000
- **STATE OF INCORPORATION:** E9
- **FISCAL YEAR END:** 0930

**FILING VALUES:**
- **FORM TYPE:** 425

**BUSINESS ADDRESS:**
- **ADDRESS IS A NON US LOCATION:** YES
- **STREET 1:** 14 PRUDENTIAL TOWER
- **CITY:** SINGAPORE
- **PROVINCE COUNTRY:** U0
- **ZIP:** 049712
- **BUSINESS PHONE:** 1 949 899 1827

**MAIL ADDRESS:**
- **ADDRESS IS A NON US LOCATION:** YES
- **STREET 1:** 14 PRUDENTIAL TOWER
- **CITY:** SINGAPORE
- **PROVINCE COUNTRY:** U0
- **ZIP:** 049712

**UNITED STATES**

**SECURITIES AND EXCHANGE COMMISSION**

**Washington, D.C. 20549**

**Form 8-K**

**Current Report**

**Pursuant to Section 13 or 15(d) of the <br> Securities Exchange Act of 1934** 

 **June 12, 2026**

Date of Report (Date of earliest event reported)

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| |
|:---|
| **<u>Eureka Acquisition Corp</u>** |
| (Exact Name of Registrant as Specified in its Charter) |

---

---

| | | |
|:---|:---|:---|
| **Cayman Islands** | **001-42152** | **N/A** |
| (State or other jurisdiction<br> of incorporation) | (Commission File Number) | (I.R.S. Employer<br> Identification No.) |

---

**14 Prudential Tower**

**Singapore 049712**

(Address of Principal Executive Offices)

**(+1) 949 899 1827**

Registrant's telephone number, including area code

N/A

(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:

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| | | |
|:---|:---|:---|
| **Title of each class** | **Trading Symbol(s)** | **Name of each exchange on which registered** |
| Units, consisting of one Class A ordinary share, $0.0001 par value, and one Right to acquire one-fifth of one Class A ordinary share | EURKU | The Nasdaq Stock Market LLC |
| Class A ordinary shares, par value $0.0001 per share | EURK | The Nasdaq Stock Market LLC |
| Rights, each whole right to acquire one-fifth of one Class A ordinary share | EURKR | 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 ☒

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 1.01. Entry into a Material Definitive Agreement.**

As previously reported in the Current Report on Form 8-K, filed with the U.S. Securities and Exchange Commission on November 3, 2025, Eureka Acquisitions Corp, a Cayman Islands exempted company (the "**SPAC**") entered into a business combination agreement on October 29, 2025, (the "**BCA**") with Marine Thinking Inc., a company (the "**Company**") incorporated under the Canada Business Corporations Act ("**CBCA**") and 17358750 Canada Inc., a company incorporated under the CBCA and a wholly-owned subsidiary of the SPAC (the "**Amalgamation Sub**," together with the SPAC and the Company, the "**Parties**, " and each, a "**Party**").

Pursuant to section 9.4 of the BCA, the BCA may be amended by a writing singed by each Party. On June 12, 2026, the Parties entered into an amendment No. 1 to the BCA (the "**Amendment No. 1**"). Pursuant to the Amendment No. 1, the Parties agreed to revise section 5.19 to revise the requirements for the post-closing directors of the SPAC. Except as expressly provided by the Amendment No. 1, the provisions of the BCA remain unchanged and in full force and effect.

The foregoing description of the Amendment No. 1 is only a summary and is qualified in its entirety by reference to the full text of the Amendment No. 1, which is attached hereto as Exhibit 2.1, and incorporated by reference herein.

**Item 9.01 Financial Statements and Exhibits.**

(d) Exhibits

The following exhibits are being filed herewith:

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| | |
|:---|:---|
| **Exhibit No.** | **Description of Exhibits** |
| 2.1 | [Amendment No. 1 to Business Combination Agreement](ea029546501ex2-1.htm) |
| 104 | Cover Page Interactive Data File (embedded within the Inline XBRL document) |

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**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.

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| | | |
|:---|:---|:---|
|  | **Eureka Acquisition Corp** | **Eureka Acquisition Corp** |
|  | By: | /s/ Fen Zhang |
|  | Name: | Fen Zhang |
|  | Title: | Chief Executive Officer |
| Date: June 23, 2026 |  |  |

---

## Exhibit 2.1

**Exhibit 2.1**

**AMENDMENT No. 1 TO BUSINESS COMBINATION AGREEMENT**

This Amendment No. 1 to Business Combination Agreement, dated as of June 12, 2026 (the "<u>Amendment</u>"), is to amend the Business Combination Agreement (the "<u>Existing BCA</u>"), which was made and entered into as of October 29, 2025, by and among Eureka Acquisition Corp, a Cayman Islands company (the "<u>SPAC</u>"), Marine Thinking Inc., a company incorporated under the CBCA (the "<u>Company</u>"), and 17358750 Canada Inc., a company incorporated under the CBCA and a wholly-owned subsidiary of the SPAC (the "<u>Amalgamation Sub</u>"). Capitalized terms used but not otherwise defined herein shall have the meanings ascribed to such terms in the Existing BCA.

<u>Recitals</u>

WHEREAS, pursuant to Section 9.4 of the Existing BCA, the Existing BCA may be amended by a writing signed by each of Parent and the Company; and

WHEREAS, the SPAC, the Company and the Amalgamation Sub desire to amend the Existing BCA to reflect the changes agreed between the parties and to clarify certain terms and conditions set forth therein.

NOW, THEREFORE, in consideration of the mutual covenants and promises set forth in this Amendment, and for other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the parties hereby agree as follows:

**1. Amendment of Certain Provisions.**

 

*Section 5.19:*

The Section 5.19 is amended in its entirety to read as follows:

"Section 5.19 <u>Post-Closing Directors of the SPAC</u>. Subject to the terms of the SPAC's Organizational Documents, the SPAC and the Company shall take all such action within its power as may be necessary or appropriate such that as of immediately prior to, from and after the Closing, each of the SPAC Board and the board of directors of the Amalco shall consist of eight (8) directors:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(a) seven directors shall be designated by the Company, four of whom shall be "independent" for purposes under Nasdaq (or any Alternative Exchange) rules requirements and one of whom shall be the "financial expert" as determined under SEC rules and regulation,

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(b) one director shall be designated by the IPO Sponsor or its Affiliates; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(c) at least five (5) of such eight (8) directors shall be Canadian citizens."

**2. Miscellaneous.**

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(a) Except as expressly provided in this Amendment, the Existing BCA shall remain in full force and effect, and all references to "this Agreement," "herein" or using similar terms in the Existing BCA shall mean the Existing BCA as further amended by this Amendment. In the event of a conflict between the terms of this Amendment and the Existing BCA, the terms of this Amendment shall prevail over and supersede the conflicting terms in the Existing BCA.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(b) This Amendment shall be governed, enforced, interpreted and construed in a manner consistent with the Existing BCA. Without limiting the foregoing, Section 5.11 (Confidentiality), Article VII, Section 9.1 (Notices), Section 9.4 (Amendments; No Waivers; Remedies), Section 9.6 (Publicity), Section 9.9 (Governing Law), Section 9.12 (Severability) and Section 9.13 (Construction) of the Existing BCA shall apply to this Amendment *mutatis mutandis* as if set out herein.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(c) This Amendment may be executed in any number of counterparts, each of which will be deemed an original, but all of which together will constitute but one and the same instrument. This Amendment will become effective when duly executed and delivered by each of the parties hereto. Counterpart signature pages to this Amendment may be delivered by electronic delivery (i.e., by email of a PDF signature page) and each such counterpart signature page will constitute an original for all purposes.

[*The remainder of this page intentionally left blank; signature pages to follow*]

IN WITNESS WHEREOF, the parties hereto have caused this Amendment to be effective as of the date first written above.

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| |
|:---|
| **SPAC:** |
| Eureka Acquisition Corp |

---

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| | |
|:---|:---|
| By: | /s/ Fen Zhang |
| Name: | Fen Zhang |
| Title: | Director |

---

---

| |
|:---|
| **COMPANY:** |
| Marine Thinking Inc. |

---

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| | |
|:---|:---|
| By: | /s/ Lishao Wang |
| Name: | Lishao Wang |
| Title: | Chairman |

---

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| |
|:---|
| **AMALGAMATION SUB:** |
| 17358750 Canada Inc. |

---

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| | |
|:---|:---|
| By: | /s/ Fen Zhang |
| Name: | Fen Zhang |
| Title: | Director |

---

 ****

***{Signature Page to Amendment No. 1 to Business Combination Agreement}***