SCHEDULE 13G 0001921821 XXXXXXXX LIVE Common Stock, par value $0.01 per share 07/01/2025 0001269026 Sintx Technologies, Inc. 829392703 1885 West 2100 South Salt Lake City UT 84119 Rule 13d-1(c) Sinaptic Holdings, LLC DE 0.00 216450.00 0.00 216450.00 216450.00 N 7.9 OO The reporting person's ownership consists of (i) 216,450 shares of common stock ("Common Stock") and (ii) 325,000 unvested warrants to purchase shares of Common Stock (the "Warrants") that will vest, if at all, upon the achievement of certain performance goals over a four-year period starting July 1, 2025 and subject to a provision limiting the holder's ability to exercise the Warrants if such exercise would cause the holder to beneficially own greater than 19.99% of the Issuer. Because the Warrants are unvested and subject to performance-based vesting goals, which have not yet been achieved, the shares of Common Stock underlying the Warrants are not deemed beneficially owned and have not been included in any of the amounts reported above. Sinaptic Surgical, LLC DE 0.00 216450.00 0.00 216450.00 216450.00 N 7.9 OO The reporting person's ownership consists of (i) 216,450 shares of Common Stock and (ii) 325,000 unvested Warrants to purchase shares of Common Stock that will vest, if at all, upon the achievement of certain performance goals over a four-year period starting July 1, 2025 and subject to a provision limiting the holder's ability to exercise the Warrants if such exercise would cause the holder to beneficially own greater than 19.99% of the Issuer. Because the Warrants are unvested and subject to performance-based vesting goals, which have not yet been achieved, the shares of Common Stock underlying the Warrants are not deemed beneficially owned and have not been included in any of the amounts reported above. Sintx Technologies, Inc. 1885 West 2100 South Salt Lake City, UT, 84119 Sinaptic Holdings, LLC ("Holdings") and Sinaptic Surgical, LLC ("Surgical") (each, a "Reporting Person", and collectively, the "Reporting Persons") Surgical is the record holder of the shares reported herein. Holdings is the sole member and manager of Surgical. Consequently, it may be deemed the beneficial owner of shares held by Surgical and to have voting and investment control over such shares. The address of each Reporting Person is 591 Brookside Drive, Longmont, CO 80504 Each Reporting Person is organized in the State of Delaware. Y Holdings may be deemed to own 216,450 shares of Common Stock owned by Surgical. Surgical is also the record holder of 325,000 unvested Warrants that will vest, if at all, upon the achievement of certain performance goals over a four-year period starting July 1, 2025 and subject to a provision limiting the holder's ability to exercise the Warrants if such exercise would cause the holder to beneficially own greater than 19.99% of the Issuer. Because the Warrants are unvested and subject to performance-based vesting goals, which have not yet been achieved, the shares of Common Stock underlying the Warrants are not deemed beneficially owned and have not been included in any of the amounts reported above. Holdings: 7.9%* Surgical: 7.9%* *The percentage ownership is determined based on an aggregate 2,725,156 shares of Common Stock of the Issuer outstanding, which is the sum of (i) 2,508,706 shares of Common Stock outstanding as of May 13, 2025, as reported on Form 10-Q filed by the Issuer with the Securities and Exchange Commission on May 15, 2025, and (ii) 216,450 shares of Common Stock owned by Surgical, which have been added to the total shares of Common Stock outstanding. 0 216,450 0 216,450 Y Y Y Y Y N By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11. 99.1 Joint Filing Agreement, dated July 1, 2025, between Holdings and Surgical. Sinaptic Holdings, LLC /s/ Bryan Scheer 07/03/2025 Sinaptic Surgical, LLC /s/ Hugh Roberts 07/03/2025