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 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
The trust account held
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
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.
Eureka Acquisition Corp reported that its trust account holds approximately $60.0 million in investments while available cash for working capital is about $274,174, leaving working capital of $94,338 (excluding public redemptions funded from the trust). During the period, approximately 2,819,767 Class A shares were redeemed, and the company recorded a $29.45 million public shareholder redemption payable drawn from the Trust Account.
The company recognized interest income of $605,749 for the quarter and $1.894 million for the nine months, producing reported net income before accretion. However, accretion of the redeemable shares to redemption value totaled $4.02 million for the nine months, and management discloses substantial doubt about the company’s ability to continue as a going concern absent a business combination or additional financing. The charter was amended to permit monthly one-month extensions (each costing $150,000), and $300,000 of extension fees had been deposited to extend the combination period.