Jiayin Group Inc.(Exact name of Registrant as specified in its charter) Securities registered or to be registered pursuant to Section 12(g) of the Act:None(Title of Class)Securities for which there is a reporting obligation pursuant to Section 15(d) of the Act:None(Title of Class) There were 209,318,184 ordinary shares outstanding, consisting of 101,318,184 Class A ordinary shares and 108,000,000 Class B ordinaryshares, par value US$0.000000005 per share, as of December 31, 2025. Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 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 Section 13 or 15(d) of the Securities Exchange Actof 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 tosuch 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 to Rule405 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 submitsuch files).Yes☒No☐ Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or an emerging growthcompany. See definition of “large accelerated filer,” “accelerated filer,” and “emerging growth company” in Rule 12b-2 of the Exchange Act. (Checkone): Large accelerated filer☐Non-accelerated filer☐ Accelerated filer☒Emerging growth company☐ If an emerging growth company that prepares its financial statements in accordance with U.S. GAAP, indicate by check mark if the registranthas elected not to use the extended transition period for complying with any new or revised financial accounting standards † provided pursuant toSection 13(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 April 5, 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 Section 404(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 Section 12(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-based compensationreceived 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 issuedby the International Accounting Standards Board☐ U.S. GAAP☒ 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☐ If 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).Yes☐No☒ (APPLICABLE ONLY TO ISSUERS INVOLVED IN BANKRUPTCY PROCEEDINGS DURING THE PAST FIVE YEARS)Indicate by check mark whether the registrant has filed all documents and reports required to be filed by Sections 12, 13 or 15(d) of theSecurities Exchange Act of 1934 subsequent to the distribution of securities under a plan confirmed by a court.Yes☐No☐ TABLE OF CONTENTS INTRODUCTION1FORWARD-LOOKING STATEMENTS2PART I3ITEM 1. IDENTITY OF DIRECTORS, SENIOR MANAGEMENT AND ADVISERS6ITEM 2. OFFER STATISTICS AND EXPECTED TIMETABLE6ITEM 3. KEY INFORMATION6ITEM 4. INFORMATION ON THE COMPANY71ITEM 4A. UNRESOLVED STAFF COMMENTS103ITEM 5. OPERATING AND FINANCIAL REVIEW AND PROSPECTS103ITEM 6. DIRECTORS, SENIOR MANAGEMENT AND EMPLOYEES117ITEM 7. MAJOR SHAREHOLDERS AND RELATED PARTY TRANSACTIONS127ITEM 8. FINANCIAL INFORMATION129ITEM 9. THE OFFER AND LISTING130ITEM 10. ADDITIONAL INFORMATION130ITEM 11. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK143ITEM 12. DESCRIPTION OF SECURITIES OTHER THAN EQUITY SECURITIES144PART II146ITEM 13. DEFAULTS, DIVIDEND ARREARAGES AND DELINQUENCIES146ITEM 14. MATERIAL MODIFICATIONS TO THE RIGHTS OF SECURITY HOLDERS AND USE OF PROCEEDS146ITEM 15. CONTROLS