☒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 ________Commission File No.000-24657MANNATECH, INCORPORATED (Exact Name of Registrant as Specified in its Charter) Texas(State or other Jurisdiction of Incorporation or Organization)1410 Lakeside Parkway, Suite 200,Flower Mound,Texas(Address of Principal Executive Offices) 75-2508900(I.R.S. Employer Identification No.)75028(Zip Code) Registrant’s Telephone Number, including Area Code:(972) 471-7400Securities Registered Pursuant to Section 12(b) of the Act: Securities Registered Pursuant to Section 12(g) of the Act:None Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes☐No☒ Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Sections 13 or 15(d) of the Securities Exchange Act of 1934 during thepreceding 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 90days. Yes☒No☐ Indicate 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).☒Yes No Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company or an emerging growthcompany. See the definitions of “large accelerated filer,” “accelerated filer”, “smaller reporting company” and “emerging growth company” in Rule 12b-2 of the ExchangeAct. Large accelerated filer☐Non-accelerated filer☒Emerging growth company☐ If an emerging growth company, indicated by check mark if the registrant has elected not to use the extended transition period for complying with any new or revisedfinancial accounting standards provided pursuant to Section 13(a) of the Exchange Act.☐ Table of Contents 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 financialreporting 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. 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 thecorrection 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 theregistrant’s executive officers during the relevant recovery period pursuant to §240.10D-1(b).☐ Indicate by check mark whether the Registrant is a shell company (as defined in Rule 12b-2 of the Act).Yes☐No☒ At June 30, 2025, the last business day of the registrant's most recently completed second quarter, the aggregate market value of the common stock held by non-affiliates ofthe Registrant was $9,875,105 based on the closing sale price of $9.35, as reported on The Nasdaq Capital Market. The number of shares of the Registrant’s common stock outstanding as ofApril 8, 2026 was 1,929,670shares. Documents Incorporated by Reference: None TABLE OF CONTENTS Special Note Regarding Forward-Looking StatementsPart IItem 1BusinessItem 1ARisk FactorsItem 1BUnresolved Staff CommentsItem 1CCybersecurityItem 2PropertiesItem 3Legal ProceedingsItem 4Mine Safety DisclosuresPart IIItem 5Market for Registrant’s Common Equity, Related Shareholder Matters and Issuer Purchases of Equity SecuritiesItem 6[Reserved]Item 7Management’s Discussion and Analysis of Financial Condition and Results of OperationsItem 7AQuantitative and Qualitative Disclosures About Market RiskItem 8Financial Statements and Supplementary DataItem 9Changes in and Disagreements with Accountants on Accounting and Financial DisclosureItem 9AControls and ProceduresItem 9BOther InformationItem 9CDisclosure Regarding Foreign Jurisdictions that Prevent InspectionsPart IIIItem 10Directors,Executive Officers and Corporate GovernanceItem 11Executive CompensationItem 12Security Ownership of Certain Beneficial Owners and Management and Related Shareholder MattersItem 13Certain Relationships and Related Transactions, and Director IndependenceItem 14Principal Accountant Fees and ServicesPart IVItem 15Exhibits and Financial Statement ScheduleItem 16Form 10-K SummarySignatures Table of Contents Special Note Regarding Forward-Looking Statements Certain disclosures and analysis in this Form 10-K, i