(Mark one) ☐REGISTRATION STATEMENT PURSUANT TO SECTION 12(b) OR (g) OFTHE SECURITIES EXCHANGE ACT OF 1934 OR ☒ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OFTHE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2025 OR ☐TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OFTHE SECURITIES EXCHANGE ACT OF 1934 OR ☐SHELL COMPANY REPORT PURSUANT TO SECTION 13 OR 15(d) OFTHE SECURITIES EXCHANGE ACT OF 1934 Date of event requiring this shell company report ________ Commission file number001-40024 MicroAlgo Inc.(Exact name of Registrant as specified in its charter) Not Applicable(Translation of Registrant’s name into English) Cayman Islands(Jurisdiction of incorporation or organization) Unit 507, Building C, Taoyuan Street,Long Jing High and New Technology Jingu Pioneer Park,Nanshan District, Shenzhen, People’s Republic of China,518052(Address of principal executive offices) Min Shu, Chief Executive Officerir@microalgor.comUnit 507, Building C, Taoyuan Street,Long Jing High and New Technology Jingu Pioneer Park,Nanshan District, Shenzhen, People’s Republic of ChinaTel: (86)0755-88600589(Name, Telephone, E-mail and/or Facsimile number and Address of Company Contact Person) Securities registered or to be registered pursuant to Section12(b) of the Act: Title of each classTrading symbol(s)Name of each exchange on which registeredClass A Ordinary share, $0.0000001 par valueMLGOThe Nasdaq Stock Market LLC Securities registered or to be registered pursuant to Section12(g) of the Act:None Securities for which there is a reporting obligation pursuant to Section15(d) of the Act.None Indicate 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 bythe annual report: 10,941,519 Class A Ordinary shares and 1,495,942 Class B Ordinary shares were outstanding as of December31, 2025. 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 Section 13 or15(d) of the Securities Exchange Act of 1934.☐Yes☒No Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section13 or 15(d) of the Securities ExchangeAct of 1934 during the preceding 12 months (or for such shorter period that the Registrant was required to file such reports), and (2) has been subjectto such filing requirements for the past 90 days.☒Yes☐No Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant toRule405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required tosubmit such files).☒Yes☐No Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, or a non-accelerated filer. See definition of“accelerated filer and large accelerated filer” in Rule12b-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 theregistrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards † providedpursuant to Section13(a) of the Exchange Act.☐ †The term “new or revised financial accounting standard” refers to any update issued by the Financial Accounting Standards Board to itsAccounting Standards Codification after April5, 2012. Indicate by check mark whether the registrant has filed a report on and attestation to its management’s assessment of the effectiveness of itsinternal control over financial reporting under Section404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firmthat prepared or issued its audit report.☐ If securities are registered pursuant to Section12(b) of the Act, indicate by check mark whether the financial statements of the registrantincluded 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-basedcompensation 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 InternationalAccounting Standards Board☐Other☐ If “Other” has been checked in response to the previous question, indicate by check mark which financial statement Item the registrant haselected to follow.Item 17☐Item 18☐ Indicate by check mark whether the registrant has filed all documents and reports required to be filed by