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of Contents](#TOC)\n\n​\n\n​\n\n**UNITED STATES**\n\n**SECURITIES AND EXCHANGE COMMISSION**\n\n**WASHINGTON, D.C. 20549**\n\n​\n\n**FORM****20-F**\n\n​\n\n**(Mark One)**\n\n☐**  ****REGISTRATION STATEMENT PURSUANT TO SECTION 12(b) OR (g) OF THE SECURITIES EXCHANGE ACT OF 1934**\n\n**OR**\n\n​\n\n☒   **ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934**\n\n**For the fiscal year ended****December 31, 2025**\n\n​\n\n**OR**\n\n​\n\n☐**  TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934**\n\n**OR**\n\n​\n\n**☐**   **SHELL COMPANY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934**\n\nDate of event requiring this shell company report\n\n​\n\n**For the transition period from****                  ****to****                  ******\n\n​\n\nCommission file number: 001-38665\n\n​\n\n**CooTek (Cayman) Inc.**\n\n(Exact Name of Registrant as Specified in Its Charter)\n\n**N/A**\n\n(Translation of Registrant’s Name into English)\n\n**Cayman Islands**\n\n(Jurisdiction of Incorporation or Organization)\n\n**7F, T3,********Lane 360, Xinlong Road****,****Minhang District********Shanghai****,****20110****1**\n\n**People’s Republic of China**\n\n(Address of Principal Executive Offices)\n\n​\n\n**Karl Kan Zhang****, Chairman of the Board of Directors, Chief Technology Officer and Acting Chief Financial Officer**\n\n**7F,****T3,********Lane 360, Xinlong Road****,****Minhang District**\n\n**Shanghai****,****20110****1********People’s Republic of China********Phone: +****86********021********6485 6352********Email:****ir@cootek.com**\n\n(Name, Telephone, Email and/or Facsimile number and Address of Company Contact Person)\n\n​\n\nSecurities registered or to be registered pursuant to Section 12(b) of the Act:\n\n​\n\n**None**\n\n​\n\nSecurities registered or to be registered pursuant to Section 12(g) of the Act:\n\n​\n\n**American depositary shares, each representing 650 Class A ordinary shares*******\n\n**Class A ordinary shares, par value US$0.00001 per share**\n\n*The American Depositary Shares program had been terminated as of January 5, 2026.\n\n(Title of Class)\n\nSecurities for which there is a reporting obligation pursuant to Section 15(d) of the Act:\n\n**None**\n\n(Title of Class)\n\n​\n\nIndicate 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 annual report:\n\n​\n\nAs of December 31, 2025, there were 4,837,255,456 ordinary shares issued and outstanding, par value US$0.00001 per share, being the sum of 4,591,030,991 Class A ordinary shares and 246,224,465 Class B ordinary shares.\n\n​\n\nIndicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.\n\n☐ Yes ☒ No\n\n​\n\n​\n\n[Table of Contents](#TOC)\n\nIf 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 or 15(d) of the Securities Exchange Act of 1934.  \n\n☐ Yes ☒ No\n\n​\n\nNote – Checking the box above will not relieve any registrant required to file reports pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 from their obligations under those Sections.\n\n​\n\nIndicate by check mark whether the registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act 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 subject to such filing requirements for the past 90 days.\n\n☒ Yes ☐ No\n\n​\n\nIndicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).  \n\n☒ Yes ☐ No\n\n​\n\nIndicate 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.\n\n​\n\nLarge accelerated filer ☐\n\nAccelerated filer ☐\n\nNon-accelerated filer ☒\n\nEmerging growth company ☐\n\n​\n\n​\n\nIf an emerging growth company that prepares its financial statements in accordance with U.S. GAAP, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards† provided pursuant to Section 13(a) of the Exchange Act. ☐\n\n​\n\n†The term “new or revised financial accounting standard” refers to any update issued by the Financial Accounting Standards Board to its Accounting Standards Codification after April 5, 2012.\n\n​\n\nIndicate 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 issued its audit report. ☐\n\n​\n\nIf 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. ☐\n\n​\n\nIndicate 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). ☐\n\n​\n\nIndicate by check mark which basis of accounting the registrant has used to prepare the financial statements included in this filing:\n\n​\n\nU.S. GAAP ☒\n\n​\n\nInternational Financial Reporting Standards as issued by the International Accounting Standards Board ☐\n\n​\n\nOther ☐\n\n​\n\nIf “Other” has been checked in response to the previous question, indicate by check mark which financial statement item the registrant has elected to follow.\n\n☐   Item 17  ☐  Item 18\n\n​\n\nIf this is an annual report, indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).\n\n☐ Yes ☒ No\n\n​\n\n(APPLICABLE ONLY TO ISSUERS INVOLVED IN BANKRUPTCY PROCEEDINGS DURING THE PAST FIVE YEARS)\n\n​\n\nIndicate by check mark whether the registrant has filed all documents and reports required to be filed by Sections 12, 13 or 15(d) of the Securities Exchange Act of 1934 subsequent to the distribution of securities under a plan confirmed by a court.\n\n☐ Yes ☐ No\n\n​\n\n​\n\n​\n\n​\n\n​\n\n[Table of Contents](#TOC)\n\n**TABLE OF CONTENTS**\n\n​\n\n​\n\n[INTRODUCTION](#INTRODUCTION_748684)\n\n1\n\n[FORWARD-LOOKING STATEMENTS](#FORWARDLOOKINGSTATEMENTS_558692)\n\n2\n\n[PART I](#PARTI_446278)\n\n​\n\n3\n\n​\n\n[ITEM 1.](#ITEM1IDENTITYOFDIRECTORSSENIORMANAGEMENT)\n\n[IDENTITY OF DIRECTORS, SENIOR MANAGEMENT AND ADVISERS](#ITEM1IDENTITYOFDIRECTORSSENIORMANAGEMENT)\n\n3\n\n​\n\n[ITEM 2.](#ITEM2OFFERSTATISTICSANDEXPECTEDTIMETABLE)\n\n[OFFER STATISTICS AND EXPECTED TIMETABLE](#ITEM2OFFERSTATISTICSANDEXPECTEDTIMETABLE)\n\n3\n\n​\n\n[ITEM 3.](#ITEM3KEYINFORMATION_224630)\n\n[KEY INFORMATION](#ITEM3KEYINFORMATION_224630)\n\n3\n\n​\n\n[ITEM 4.](#ITEM4INFORMATIONONTHECOMPANY_732584)\n\n[INFORMATION ON THE COMPANY](#ITEM4INFORMATIONONTHECOMPANY_732584)\n\n72\n\n​\n\n[ITEM 4A.](#ITEM4BUNRESOLVEDSTAFFCOMMENTS_448467)\n\n[UNRESOLVED STAFF COMMENTS](#ITEM4BUNRESOLVEDSTAFFCOMMENTS_448467)\n\n104\n\n​\n\n[ITEM 5.](#ITEM5OPERATINGANDFINANCIALREVIEWANDPROSP)\n\n[OPERATING AND FINANCIAL REVIEW AND PROSPECTS](#ITEM5OPERATINGANDFINANCIALREVIEWANDPROSP)\n\n104\n\n​\n\n[ITEM 6.](#ITEM6DIRECTORSSENIORMANAGEMENTANDEMPLOYE)\n\n[DIRECTORS, SENIOR MANAGEMENT AND EMPLOYEES](#ITEM6DIRECTORSSENIORMANAGEMENTANDEMPLOYE)\n\n122\n\n​\n\n[ITEM 7.](#ITEM7MAJORSHAREHOLDERSANDRELATEDPARTYTRA)\n\n[MAJOR SHAREHOLDERS AND RELATED PARTY TRANSACTIONS](#ITEM7MAJORSHAREHOLDERSANDRELATEDPARTYTRA)\n\n129\n\n​\n\n[ITEM 8.](#ITEM8FINANCIALINFORMATION_813477)\n\n[FINANCIAL INFORMATION](#ITEM8FINANCIALINFORMATION_813477)\n\n130\n\n​\n\n[ITEM 9.](#ITEM9THEOFFERANDLISTING_581857)\n\n[THE OFFER AND LISTING](#ITEM9THEOFFERANDLISTING_581857)\n\n131\n\n​\n\n[ITEM 10.](#ITEM10ADDITIONALINFORMATION_332395)\n\n[ADDITIONAL INFORMATION](#ITEM10ADDITIONALINFORMATION_332395)\n\n132\n\n​\n\n[ITEM 11.](#ITEM11QUANTITATIVEANDQUALITATIVEDISCLOSU)\n\n[QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK](#ITEM11QUANTITATIVEANDQUALITATIVEDISCLOSU)\n\n148\n\n​\n\n[ITEM 12.](#ITEM12DESCRIPTIONOFSECURITIESOTHERTHANEQ)\n\n[DESCRIPTION OF SECURITIES OTHER THAN EQUITY SECURITIES](#ITEM12DESCRIPTIONOFSECURITIESOTHERTHANEQ)\n\n148\n\n[PART II](#PARTII_382752)\n\n​\n\n151\n\n​\n\n[ITEM 13.](#ITEM13DEFAULTSDIVIDENDARREARAGESANDDELIN)\n\n[DEFAULTS, DIVIDEND ARREARAGES AND DELINQUENCIES](#ITEM13DEFAULTSDIVIDENDARREARAGESANDDELIN)\n\n151\n\n​\n\n[ITEM 14.](#ITEM14MATERIALMODIFICATIONSTOTHERIGHTSOF)\n\n[MATERIAL MODIFICATIONS TO THE RIGHTS OF SECURITY HOLDERS AND USE OF PROCEEDS](#ITEM14MATERIALMODIFICATIONSTOTHERIGHTSOF)\n\n151\n\n​\n\n[ITEM 15.](#ITEM15CONTROLSANDPROCEDURES_603734)\n\n[CONTROLS AND PROCEDURES](#ITEM15CONTROLSANDPROCEDURES_603734)\n\n151\n\n​\n\n[ITEM 16.](#ITEM16RESERVED_12401)\n\n[[RESERVED]](#ITEM16RESERVED_12401)\n\n152\n\n​\n\n[ITEM 16A.](#ITEM16AAUDITCOMMITTEEFINANCIALEXPERT_604)\n\n[AUDIT COMMITTEE FINANCIAL EXPERT](#ITEM16AAUDITCOMMITTEEFINANCIALEXPERT_604)\n\n152\n\n​\n\n[ITEM 16B.](#ITEM16BCODEOFETHICS_7025)\n\n[CODE OF ETHICS](#ITEM16BCODEOFETHICS_7025)\n\n152\n\n​\n\n[ITEM 16C.](#ITEM16CPRINCIPALACCOUNTANTFEESANDSERVICE)\n\n[PRINCIPAL ACCOUNTANT FEES AND SERVICES](#ITEM16CPRINCIPALACCOUNTANTFEESANDSERVICE)\n\n153\n\n​\n\n[ITEM 16D.](#ITEM16DEXEMPTIONSFROMTHELISTINGSTANDARDS)\n\n[EXEMPTIONS FROM THE LISTING STANDARDS FOR AUDIT COMMITTEES](#ITEM16DEXEMPTIONSFROMTHELISTINGSTANDARDS)\n\n153\n\n​\n\n[ITEM 16E.](#ITEM16EPURCHASESOFEQUITYSECURITIESBYTHEI)\n\n[PURCHASES OF EQUITY SECURITIES BY THE ISSUER AND AFFILIATED PURCHASERS](#ITEM16EPURCHASESOFEQUITYSECURITIESBYTHEI)\n\n153\n\n​\n\n[ITEM 16F.](#ITEM16FCHANGEINREGISTRANTSCERTIFYINGACCO)\n\n[CHANGE IN REGISTRANT’S CERTIFYING ACCOUNTANT](#ITEM16FCHANGEINREGISTRANTSCERTIFYINGACCO)\n\n153\n\n​\n\n[ITEM 16G.](#ITEM16GCORPORATEGOVERNANCE_292877)\n\n[CORPORATE GOVERNANCE](#ITEM16GCORPORATEGOVERNANCE_292877)\n\n153\n\n​\n\n[ITEM 16H.](#ITEM16HMINESAFETYDISCLOSURE_17877)\n\n[MINE SAFETY DISCLOSURE](#ITEM16HMINESAFETYDISCLOSURE_17877)\n\n153\n\n​\n\n[ITEM 16I.](#ITEM16IDISCLOSUREREGARDINGFOREIGNJURISDI)\n\n[DISCLOSURE REGARDING FOREIGN JURISDICTIONS THAT PREVENT INSPECTIONS](#ITEM16IDISCLOSUREREGARDINGFOREIGNJURISDI)\n\n153\n\n​\n\n[ITEM 16J.](#ITEM16JINSIDERTRADINGPOLICIES_520652)\n\n[INSIDER TRADING POLICIES](#ITEM16JINSIDERTRADINGPOLICIES_520652)\n\n153\n\n​\n\n[ITEM 16K](#ITEM16KCYBERSECURITY_990459).\n\n[CYBERSECURITY](#ITEM16KCYBERSECURITY_990459)\n\n154\n\n[PART III](#PARTIII_312270)\n\n​\n\n155\n\n​\n\n[ITEM 17.](#ITEM17FINANCIALSTATEMENTS_371793)\n\n[FINANCIAL STATEMENTS](#ITEM17FINANCIALSTATEMENTS_371793)\n\n155\n\n​\n\n[ITEM 18.](#ITEM18FINANCIALSTATEMENTS_10469)\n\n[FINANCIAL STATEMENTS](#ITEM18FINANCIALSTATEMENTS_10469)\n\n155\n\n​\n\n[ITEM 19.](#ITEM19EXHIBITS_264700)\n\n[EXHIBITS](#ITEM19EXHIBITS_264700)\n\n155\n\n[SIGNATURES](#SIGNATURES_256631)\n\n​\n\n158\n\n​\n\n​\n\n​\n\n​\n\ni\n\n[Table of Contents](#TOC)\n\n**INTRODUCTION**\n\nUnless otherwise indicated or the context otherwise requires, references in this annual report on Form 20-F to:\n\n●“CooTek,” are to CooTek (Cayman) Inc., and “we,” “us,” “our company” or “our” are to CooTek (Cayman) Inc. and its subsidiaries, and in the context of describing the operations and consolidated financial information, the VIEs (as defined below) and the VIEs’ subsidiaries;\n\n●“China” or the “PRC” are to the People’s Republic of China;\n\n●“Class A ordinary shares” are to our Class A ordinary shares of par value US$0.00001 per share;\n\n●“Class B ordinary shares” are to our Class B ordinary shares of par value US$0.00001 per share;\n\n●“shares” or “ordinary shares” are to our Class A and Class B ordinary shares, par value US$0.00001 per share;\n\n●“ADSs” are to our American depositary shares, each of which represents 650 Class A ordinary shares; except as otherwise indicated, all ADS and per ADS data in this annual report give retroactive effect to the change in the number of Class A ordinary shares represented by each ADS from 50 to 650 that became effective on May 9, 2022;\n\n●“ADRs” are to the American depositary receipts that evidence our ADSs;\n\n●“DAUs” are to the number of active users of our products during a given day. For each individual product, we treat each mobile device on which at least one of the following actions is taken during a given day as one active user for that day: (i) activating or launching such product, (ii) logging in with the user account for such product, or (iii) any other actions that result in a successful network access to our services through such product. The DAUs of multiple products during a given day is the sum of active users of each such product for that day;\n\n●“MAUs” are to the number of active users of our products during a given month. For each individual product, we treat each mobile device on which at least one of the following actions is taken during a given month as one active user for that month: (i) activating or launching such product, (ii) logging in with the user account for such product, or (iii) any other actions that result in a successful network access to our services through such product. The MAUs of multiple products during a given month is the sum of active users of each such product for that month;\n\n●“our portfolio products” are to pan-entertainment mobile applications, which include our mobile games and online literature products, and utility mobile applications, which include our internally developed utility applications to enhance mobile users’ functional experiences on smart phones;\n\n●“the VIEs” or “variable interest entities” are to Shanghai Chubao (CooTek) Information Technology Co., Ltd., Molihong (Shenzhen) Internet Technology Co., Ltd. and Shanghai Qinglin Network Technology Co., Ltd., all of which are companies incorporated in mainland China in which we do not have equity interests but whose financial results have been consolidated into our consolidated financial statements based solely on contractual arrangements in accordance with U.S. GAAP;\n\n●“RMB” and “Renminbi” are to the legal currency of mainland China; and\n\n●“US$,” “U.S. dollars,” “$,” and “dollars” are to the legal currency of the United States.\n\nAll discrepancies in any table between the amounts identified as total amounts and the sum of the amounts listed therein are due to rounding.\n\nUnless otherwise noted, all translations from Renminbi to U.S. dollars and from U.S. dollars to Renminbi in this annual report were made at a rate of RMB6.9931 to US$1.00, the exchange rate on December 31, 2025 set forth in the H.10 statistical release of the Board of Governors of the Federal Reserve System. We make no representation that any Renminbi or U.S. dollars amounts could have been, or could be, converted into U.S. dollars or Renminbi, as the case may be, at any particular rate, or at all. The PRC government imposes control over its foreign currency reserves in part through direct regulation of the conversion of Renminbi into foreign exchange and through restrictions on foreign trade.\n\n​\n\n1\n\n[Table of Contents](#TOC)\n\n**FORWARD-LOOKING STATEMENTS**\n\nThis annual report on Form 20-F contains forward-looking statements that reflect our current expectations and views of future events. Known and unknown risks, uncertainties and other factors, including those listed under “Item 3. Key Information—D. Risk Factors,” may cause our actual results, performance or achievements to be materially different from those expressed or implied by the forward-looking statements.\n\nYou can identify some of these forward-looking statements by words or phrases such as “may,” “will,” “expect,” “anticipate,” “aim,” “estimate,” “intend,” “plan,” “believe,” “is/are likely to,” “potential,” “continue” or other similar expressions. We have based these forward-looking statements largely on our current expectations and projections about future events that we believe may affect our financial condition, results of operations, business strategy and financial needs. These forward-looking statements include statements relating to:\n\n●our mission and strategies;\n\n●our future business development, financial conditions and results of operations;\n\n●the expected growth of the mobile internet industry and mobile advertising industry;\n\n●our expectations regarding demand for and market acceptance of our products and services;\n\n●competition in our industry;\n\n●government policies and regulations relating to our industry or any aspect of our operations and the implementation of a corporate structure involving the VIEs in China; and\n\n●other factors described under “Item 3. Key Information—D. Risk Factors.”\n\nYou should read this annual report and the documents that we refer to in this annual report and have filed as exhibits to this annual report completely and with the understanding that our actual future results may be materially different from what we expect. Other sections of this annual report discuss factors which could adversely impact our business and financial performance. Moreover, we operate in an evolving environment. New risk factors emerge from time to time and it is not possible for our management to predict all risk factors, nor can we assess the impact of all factors on our business or the extent to which any factor, or combination of factors, may cause actual results to differ materially from those contained in any forward-looking statements. We qualify all of our forward-looking statements by these cautionary statements.\n\nYou should not rely upon forward-looking statements as predictions of future events. The forward-looking statements made in this annual report relate only to events or information as of the date on which the statements are made in this annual report. Except as required by law, we undertake no obligation to update or revise publicly any forward-looking statements, whether as a result of new information, future events or otherwise, after the date on which the statements are made or to reflect the occurrence of unanticipated events.\n\n​\n\n2\n\n[Table of Contents](#TOC)\n\n**PART I**"}