[Mark One]☐REGISTRATION STATEMENT PURSUANT TO SECTION 12(b) OR (g) OF THE SECURITIES EXCHANGE ACT OF 1934 OR☒ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2025OR☐TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from ________ to _________ OR☐SHELL COMPANY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of event requiring this shell company report Commission file number: 001-42797 Securities registered or to be registered pursuant to Section12(b) of the Act.Title of each classTrading Symbol(s) Securities registered or to be registered pursuant to Section12(g) of the Act.NoneSecurities for which there is a reporting obligation pursuant to Section15(d) of the Act.Ordinary SharesIndicate the number of outstanding shares of each of the issuer’s classes of capital or common stock as of the close of the period covered by the annualreport.(1)Title of each classNumber of shares outstanding 150,833,916 Ordinary Shares Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule405 of the Securities Act.Yes☐No☒If this report is an annual or transition report, indicate by check mark if the registrant is not required to file reports pursuant to Section13 or 15(d) of theSecurities Exchange Act of 1934.Yes☐No☒Note—checking the box above will not relieve any registrant required to file reports pursuant to Section13 or 15(d) of the Securities Exchange Act of 1934 from their obligations under those Sections.Indicate by check mark whether the registrant (1)has filed all reports required to be filed by Section13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12months (or for such shorter period that the registrant was required to file such reports), and (2)has been subject to such filingrequirements for the past 90days.Yes☒No☐ Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule405 ofRegulationS-T (§232.405 of this chapter) during the preceding 12months (or for such shorter period that the registrant was required to submit suchfiles).Yes☒No☐Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” and “emerging growth company” in Rule 12b-2 of the Exchange Act. If an emerging growth company that prepares its financial statements in accordance with U.S. GAAP, indicate by check mark if the registrant has elected notto use the extended transition period for complying with any new or revised financial accounting standards † provided pursuant to Section 13(a) of theExchange Act.☐Indicate by check mark whether the Registrant has filed a report on and attestation to its management’s assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issuedits audit report.☐If securities are registered pursuant to Section 12(b) of the Act, indicate by check mark whether the financial statements of the registrant included in the filing reflect the correction of an error to previously issued financial statements.☐Indicate by check mark whether any of those error corrections are restatements that required a recovery analysis of incentive-based compensation received by any of the registrant’s executive officers during the relevant recovery period pursuant to §240.10D-1(b)☐ Indicate by check mark which basis of accounting the registrant has used to prepare the financial statements included in this filing: International Financial Reporting Standards☒as issued by the International AccountingStandards Board If “Other” has been checked in response to the previous question, indicate by check mark which financial statement item the registrant has elected to follow.Item17☐Item18☐If this is an annual report, indicate by check mark whether the registrant is a shell company (as defined in Rule12b-2 of the Exchange Act).Yes☐No☒ TABLE OF CONTENTS In this Annual Report on Form20‑F (this “Annual Report”), references to “Bullish,” the “company,” “we,” “us,” or similar terms are to Bullish and, as thecontext requires, its consolidated subsidiaries. Our consolidated financial statements are prepared in accordance with the international financial reporting standards (“IFRS”). Our fiscal year ends onDecember31 of each year. References to any specific fiscal year refer to the year ended December31 of the calendar year specified. Special Note Regarding Forward‑Looking Statements This Annual Report contains forward‑looking statements that involve risks and uncertainties. Words such as “project,” “believe,” “anticipate