Welcome to our dedicated page for Eureka Acquisition SEC filings (Ticker: EURKU), a comprehensive resource for investors and traders seeking official regulatory documents including 10-K annual reports, 10-Q quarterly earnings, 8-K material events, and insider trading forms.
Eureka Acquisition Corp files a range of documents with the U.S. Securities and Exchange Commission (SEC) that outline its structure and progress as a special purpose acquisition company (SPAC). As a Cayman Islands exempted company with securities listed on Nasdaq under the symbols EURKU, EURK, and EURKR, its SEC filings provide detailed information on its units, Class A ordinary shares, and rights, as well as its charter, trust account arrangements, and sponsor financing.
Current reports on Form 8-K for Eureka Acquisition Corp describe material events such as amendments to its memorandum and articles of association, changes to the deadline for completing an initial business combination, and the introduction of a monthly extension framework. These filings explain that the company may extend its business combination period in one-month increments up to a specified outside date, subject to depositing a fixed monthly extension fee into its trust account. Related 8-Ks also report trust agreement amendments that set cure periods and outline the consequences if extension payments are not made, including the requirement to cease operations except for winding up and to liquidate and dissolve.
Additional 8-K filings detail unsecured promissory notes issued to the sponsor, Hercules Capital Management Corp, to fund monthly extension fees and working capital. These notes bear no interest, are repayable upon the earlier of a business combination or the expiry of the company’s term, and may be converted at the sponsor’s option into private units of Eureka Acquisition Corp at a price referenced to the unit offering price. Such filings also address the potential issuance of units and underlying securities as unregistered sales of equity securities.
Filings related to shareholder meetings, including reports on voting results, summarize approvals of charter amendments, auditor appointments, and the number of Class A ordinary shares redeemed in connection with key proposals. Investors can use these documents to understand the evolving share count, the balance between public and sponsor-held shares, and the procedural steps toward a business combination.
In connection with its proposed business combination with Marine Thinking Inc., Eureka Acquisition Corp has indicated that it will file a registration statement on Form S-4, which will include a proxy statement/prospectus describing the transaction terms, shareholder voting process, and the structure of the combined company. This filings page, together with AI-powered summaries, helps readers interpret complex forms such as 8-Ks, S-1, and future S-4 materials by highlighting key dates, obligations, extension mechanics, and sponsor financing terms.
Eureka Acquisition Corp entered into a new unsecured promissory note with Marine Thinking Inc. for $150,000 to fund a one-month extension of its deadline to complete an initial business combination.
The payment into the company’s trust account extends the combination date from April 3, 2026 to May 3, 2026. The Extension Note bears no interest and is repayable on the earlier of completing the business combination or the company’s term expiry. Marine Thinking may choose to convert the note into private units at $10.00 per unit, with each unit consisting of one Class A ordinary share and a right to receive one-fifth of a Class A share after a business combination.
Eureka Acquisition Corp reported receiving a Nasdaq notice on April 6, 2026 stating it no longer meets the Nasdaq Capital Market’s Minimum Public Holders Rule, which requires at least 300 public holders. The notice is a deficiency notification only and does not immediately affect trading.
The company has 45 calendar days, until May 21, 2026, to submit a plan to regain compliance. If Nasdaq accepts the plan, Eureka Acquisition could receive up to 180 calendar days from the notice date to demonstrate compliance, or it may appeal if a plan is not accepted.
Eureka Acquisition Corp entered into a new financing arrangement to extend the deadline for completing its initial business combination. Marine Thinking Inc. deposited a $150,000 Monthly Extension Fee into Eureka’s trust account, allowing the business combination deadline to move from March 3, 2026 to April 3, 2026.
In return, Eureka issued Marine Thinking an unsecured, interest-free $150,000 Extension Promissory Note dated March 13, 2026. The note is payable upon either completion of the business combination or expiry of Eureka’s term and may be converted, at Marine Thinking’s option, into Eureka private units at $10.00 per unit, each unit consisting of one Class A ordinary share and one right to receive one-fifth of a Class A share.
Eureka Acquisition Corp filed its quarterly report, showing it remains a pre‑revenue SPAC focused on completing a business combination. For the three months ended December 31, 2025, it recorded a net loss of $118,289, driven mainly by $417,642 of general and administrative expenses, partly offset by $299,353 of interest on its trust investments.
The trust account held $32,087,675 tied to 2,930,233 Class A ordinary shares subject to possible redemption, while the company had cash of $32,797 and a working capital deficit of $1,492,915 as of December 31, 2025. Management discloses substantial doubt about its ability to continue as a going concern if no business combination is completed by up to July 3, 2026.
Eureka details its signed business combination agreement with Marine Thinking Inc., including a planned continuance to Canada and subsequent amalgamation, plus related support, voting, registration rights, lock‑up, option and finder’s agreements. Shareholders previously redeemed 2,819,767 Class A shares for approximately $29 million, and the sponsor is funding monthly extension fees through non‑interest‑bearing promissory notes convertible into private units.
Eureka Acquisition Corp extended the deadline to complete its initial business combination from February 3, 2026 to March 3, 2026 by depositing a $150,000 Monthly Extension Fee into its trust account. The fee was paid by its sponsor, Hercules Capital Management Corp.
In return, Eureka issued the sponsor an unsecured $150,000 Extension Promissory Note dated February 4, 2026. The note bears no interest and is due upon the earlier of completing a business combination or the company’s expiry date, and includes standard event-of-default triggers that can accelerate repayment.
The sponsor may choose to convert the principal into private units at $10.00 per unit, with each unit consisting of one Class A ordinary share and a right to receive one-fifth of a Class A ordinary share after a business combination. These units, if issued, are restricted from transfer until the business combination and carry registration rights.
Feis Equities LLC and Lawrence M. Feis filed an amended Schedule 13G reporting beneficial ownership of 285,592 Class A ordinary shares of Eureka Acquisition Corp, representing 8.43% of the class. This percentage is based on 3,388,233 Class A shares outstanding as of December 12, 2025.
The reporting persons state they have sole voting and dispositive power over these shares and no shared power. They also certify the holdings were not acquired to change or influence control of Eureka Acquisition Corp.
Eureka Acquisition Corp filed an update describing how it extended the deadline to complete its initial business combination. Under its charter, the company could extend the deadline in one‑month increments up to July 3, 2026 by depositing a $150,000 Monthly Extension Fee into its trust account.
On September 2, 2025, the sponsor, Hercules Capital Management Corp, deposited $150,000 into the trust account, moving the deadline from September 3, 2025 to October 3, 2025. In return, on September 3, 2025 the company issued a $150,000 unsecured, interest‑free promissory note to the sponsor, due at the earlier of a business combination or the company’s expiry.
The sponsor may choose to convert the note into private units at $10.00 per unit, with each unit consisting of one Class A ordinary share and a right to receive one‑fifth of a Class A share upon completion of a business combination. These units, if issued, are restricted from transfer until the business combination is completed and carry registration rights.
Eureka Acquisition Corp filed an Form 8-K reporting a material event that includes a Sponsor Promissory Note dated August 25, 2025 issued by the company to Hercules Capital Management Corp. The filing lists Exhibit 10.1 as the promissory note and an interactive data cover page embedded in the Inline XBRL document. The document is signed by Fen Zhang, Chief Executive Officer, dated August 26, 2025. The filing discloses the existence of the financing instrument but does not provide the note's principal amount, interest rate, maturity, or other economic terms in the text provided.
AQR Capital Management, AQR Capital Management Holdings and AQR Arbitrage report beneficial ownership of 179,141 Class A ordinary shares of Eureka Acquisition Corp, representing 5.65% of the class. The three reporting persons disclose shared voting power and shared dispositive power over those shares and each reports zero sole voting or dispositive power, signaling no unilateral control.
The submission is a Schedule 13G amendment including a certification that the securities were acquired and are held in the ordinary course of business and not for the purpose of changing or influencing control of the issuer. The filing identifies the reporting persons as an investment adviser and a parent holding company, consistent with institutional passive ownership.
Mizuho Financial Group, Inc. filed an amended Schedule 13G disclosing a material passive stake in Eureka Acquisition Corp common shares (CUSIP G32168109). The filing reports beneficial ownership of 550,000 shares, representing 8.9% of the class, with sole voting and dispositive power over those shares.
The submission indicates Mizuho is a parent holding company and notes that Mizuho Securities USA LLC (a wholly owned subsidiary) and related affiliates may be deemed indirect beneficial owners of the securities. The filer certifies the holdings were acquired and are held in the ordinary course of business and not for purposes of changing control. The form is signed by Takahiro Katsura on 08/13/2025 and references an Exhibit A for subsidiary identification.