Eureka Acquisition Corp

Item 8.01. Other Events Supplement to the Definitive Proxy Statement On June 23, 2025, Eureka Acquisition Corp. (the “Company”) issued a press release announcing (i) the postponement of its previously announced extraordinary general meeting in lieu of an annual general meeting of shareholders (the “Extraordinary General Meeting”) from 9:00 a.m. Eastern Time on June 25, 2025 to 9:00 a.m. Eastern Time on June 30, 2025 (the “Postponement”) to allow the Company additional time to engage with shareholders, and (ii) the resulting extension of the deadline from June 23, 2025 (two business days before the Extraordinary General Meeting, as originally scheduled) to June 26, 2025 (two business days before the postponed Extraordinary General Meeting) for delivery of redemption requests from the Company’s shareholders in connection with the Charter Amendment Proposal (the “Redemption Deadline Extension”). Accordingly, the Company has determined to amend and supplement the Definitive Proxy Statement as described in this current report on Form 8-K (the “Current Report”). There is no change to the location, the record date or any of the other proposals to be acted upon at the Extraordinary General Meeting. The physical location of the Extraordinary General Meeting remains at the offices of Robinson & Cole LLP located at 666 Third Avenue, 20th Floor, New York, NY 10017, and virtually via teleconference using the dial-in information: +1 813-308-9980 (Access Code: 173547). If you have questions regarding the certification of your position or delivery of your shares, please contact: Continental Stock Transfer & Trust Company 1 State Street 30th Floor New York, NY 10004-1561 E-mail: spacredemptions@continentalstock.com A copy of the press release is attached hereto as Exhibit 99.1. The information in Exhibit 99.1 is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as expressly set forth by specific reference in such filing. The Company’s shareholders who have questions regarding the Postponement, the Extraordinary General Meeting, or would like to request documents may contact the Company’s proxy solicitor, Advantage Proxy, Inc., at (877) 870-8565, or banks and brokers can call (206) 870-8565, or by email at ksmith@advantageproxy.com. AMENDMENT AND SUPPLEMENT TO THE DEFINITIVE PROXY STATEMENT The following disclosures in this Current Report on Form 8-K supplement, and should be read in conjunction with, the disclosures contained in the Company’s definitive proxy statement, including any amendments or supplements thereto (the “Definitive Proxy Statement”), filed with the Securities and Exchange Commission (the “SEC”) on June 3, 2025, which in turn should be read in its entirety. To the extent the information set forth herein differs from or updates information contained in the Definitive Proxy Statement, the information set forth herein shall supersede or supplement the information in the Definitive Proxy Statement. All other information in the Definitive Proxy Statement remains unchanged. As provided in the Definitive Proxy Statement, the Company is seeking shareholder approval of, among other things, the Charter Amendment Proposal. The purpose of the supplemental disclosures is to provide information about (i) the postponement of the Extraordinary General Meeting related to the Definitive Proxy Statement, and (ii) the resulting extension of the deadline for delivery of redemption requests from the Company’s shareholders to the Company’s transfer agent. Terms used herein, unless otherwise defined, have the meanings set forth in the Definitive Proxy Statement. Extraordinary General Meeting Date On June 23, 2025, the Company issued a press release announcing that it has determined to postpone (the “Postponement”) the date of its previously announced extraordinary general meeting in lieu of an annual general meeting of shareholders (the “Extraordinary General Meeting”) from June 25, 2025 to June 30, 2025. As a result of this change, the Extraordinary General Meeting will now be held at 9:00 a.m. Eastern Time on June 30, 2025 at the offices of Robinson & Cole LLP (“R&C”) located at 666 Third Avenue, 20th Floor, New York, NY 10017, and virtually via teleconference using the dial-in information: +1 813-308-9980 (Access Code: 173547), or at such other time, on such other date and at such other place to which the meeting may be postponed or adjourned. Extension of Redemption Deadline As a result of the Postponement, the previously disclosed deadline of June 23, 2025 (two business days before the Extraordinary General Meeting) for delivery of redemption requests from the Company’s shareholders to the Company’s transfer agent has been extended to June 26, 2025 (two business days before the postponed Extraordinary General Meeting). Forward-Looking Statements This Current Report on Form 8-K includes “forward-looking statements” within the meaning of the safe harbor provisions of the United States Private Securities Litigation Reform Act of 1995. Certain of these forward-looking statements can be identified by the use of words such as “believes,” “expects,” “intends,” “plans,” “estimates,” “assumes,” “may,” “should,” “will,” “seeks,” or other similar expressions. Such statements may include, but are not limited to, statements regarding the date of the Extraordinary General Meeting and redemption request deadline. These statements are based on current expectations on the date of this Current Report on Form 8-K and involve a number of risks and uncertainties that may cause actual results to differ significantly. The Company does not assume any obligation to update or revise any such forward-looking statements, whether as the result of new developments or otherwise. Readers are cautioned not to put undue reliance on forward-looking statements. Additional Information and Where to Find It On June 3, 2025, the Company filed the Definitive Proxy Statement with the SEC in connection with its solicitation of proxies for the Extraordinary General Meeting. INVESTORS AND SECURITY HOLDERS OF THE COMPANY ARE URGED TO READ THE DEFINITIVE PROXY STATEMENT (INCLUDING ANY AMENDMENTS OR SUPPLEMENTS THERETO) AND OTHER DOCUMENTS THE COMPANY FILES WITH THE SEC CAREFULLY IN THEIR ENTIRETY WHEN THEY BECOME AVAILABLE AS THEY WILL CONTAIN IMPORTANT INFORMATION. Investors and security holders will be able to obtain free copies of the Definitive Proxy Statement (including any amendments or supplements thereto) and other documents filed with the SEC through the web site maintained by the SEC at www.sec.gov or contact proxy solicitor: Advantage Proxy, Inc. P.O. Box 13581 Des Moines, WA 98198 Attn: Karen Smith Toll Free: (877) 870-8565 Collect: (206) 870-8565 Email: ksmith@advantageproxy.com Participants in the Solicitation The Company and its respective directors and officers may be deemed to be participants in the solicitation of proxies from shareholders in connection with the Extraordinary General Meeting. Additional information regarding the identity of these potential participants and their direct or indirect interests, by security holdings or otherwise, is set forth in the Definitive Proxy Statement. You may obtain free copies of these documents using the sources indicated above.