Sintx Technologies Inc美股招股说明书(2025-10-03版)

PROSPECTUS SUPPLEMENT(To Prospectus dated November 27, 2023) SINTX TECHNOLOGIES, INC. We have entered into an At the Market Offering Agreement (the “Sales Agreement”), with H.C. Wainwright & Co., LLC(“Wainwright” or the “sales agent”) relating to the sale of shares of our common stock, par value $0.01 per share (the “CommonStock”), offered by this prospectus supplement and the accompanying prospectus. In accordance with the terms of such SalesAgreement, we may offer and sell shares of our Common Stock having an aggregate offering price of up to $6,413,876 from time totime through or to Wainwright acting as our agent or principal. Our Common Stock is traded on The Nasdaq Capital Market tier of The Nasdaq Stock Market, LLC under the symbol “SINT.” Thelast reported sale price of our Common Stock on The Nasdaq Capital Market on October 2, 2025 was $4.11 per share. As of October 3, 2025 the aggregate market value of our Common Stock held by our non-affiliates was $19,241,630, based upon3,492,129 shares of our outstanding Common Stock held by non-affiliates at the per share price of $5.51, the closing sale price of ourCommon Stock on The Nasdaq Capital Market on September 5, 2025. Pursuant to General Instruction I.B.6 of Form S-3, in no eventwill we sell securities in a public offering with a value exceeding more than one-third of our “public float” (i.e., the aggregate marketvalue of our Common Stock held by our non-affiliates) in any 12 calendar-month period so long as our public float remains below$75.0 million. During the 12 calendar months prior to and including the date of this prospectus supplement (but excluding thisoffering), we have not sold any securities in reliance on General Instruction I.B.6 of Form S-3. As a result, we are eligible to offer andsell up to an aggregate of $6,413,876 of our securities pursuant to General Instruction I.B.6. of Form S-3. Sales of our Common Stock, if any, under this prospectus supplement will be made in sales deemed to be an “at the market offering”as defined in Rule 415(a)(4) promulgated under the Securities Act of 1933, as amended (the “Securities Act”), including, withoutlimitation, sales made directly on or through the Nasdaq Capital Market, the trading market for our Common Stock, or any otherexisting trading market in the United States for our Common Stock, sales made to or through a market maker other than on anexchange or otherwise, directly to Wainwright as principal, in negotiated transactions at market prices prevailing at the time of sale orat prices related to such prevailing market prices and/or in any other method permitted by law. Wainwright is not required to sell anyspecific amount of securities but will act as our sales agent using commercially reasonable efforts consistent with its normal tradingand sales practices, on mutually agreed terms between Wainwright and us. There is no arrangement for funds to be received in anyescrow, trust or similar arrangement. The compensation to Wainwright for sales of Common Stock sold pursuant to the Sales Agreement will be 3.0% of the gross proceedsof any shares of Common Stock sold under the Sales Agreement. In connection with the sale of the Common Stock on our behalf,Wainwright will be deemed to be an “underwriter” within the meaning of the Securities Act and the compensation of Wainwright willbe deemed to be underwriting commissions or discounts. We have also agreed to provide indemnification and contribution toWainwright with respect to certain liabilities, including liabilities under the Securities Act or the Securities Exchange Act of 1934, asamended (the “Exchange Act”). See the section titled “Plan of Distribution” on page S-8 of this prospectus supplement. Investing in our common stock involves a high degree of risk. You should review carefully the risks and uncertaintiesreferenced under the heading “Risk Factors” beginning on page S-3 of this prospectus supplement and under similar headingsin the documents that are incorporated by reference into this prospectus supplement and the accompanying prospectus. Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of thesesecurities or passed upon the adequacy or accuracy of this prospectus. Any representation to the contrary is a criminal offense. H.C. Wainwright & Co. The date of this prospectus supplement is October 3, 2025. TABLE OF CONTENTS PageABOUT THIS PROSPECTUS SUPPLEMENTS-iCAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTSS-iiPROSPECTUS SUPPLEMENT SUMMARYS-1THE OFFERINGS-2RISK FACTORSS-3USE OF PROCEEDSS-6DILUTIONS-7PLAN OF DISTRIBUTIONS-8LEGAL MATTERSS-9EXPERTSS-9WHERE YOU CAN FIND ADDITIONAL INFORMATIONS-9INFORMATION INCORPORATED BY REFERENCES-9 PageABOUT THIS PROSPECTUSiSPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTSiiPROSPECTUS SUMMARY1RISK FACTORS5USE OF PROCEEDS5DESCRIPTION OF CAPITAL STOCK6DESCRIPTION OF DEBT SECURITIES21DESCRIPTION OF WARRANTS28DESCRIPTION OF RIGHTS30DE