Sintx Technologies, Inc.

Trading Arrangements

During the three months ended June 30, 2026, none of the Company’s directors or officers adopted, modified orterminated a “Rule 10b5-1 trading arrangement” or “non-Rule 10b5-1 trading arrangement,” as each term is defined in Item 408(a) of Regulation S-K.

Change in Control Agreement with Chief Financial Officer

On August 7, 2026, SINTX Technologies, Inc. (the “Company”) entered into a Change in Control Agreement (the “Agreement”) with Kevin Trask, the Company’s Chief Financial Officer.

Under the Agreement, if Mr. Trask’s employment is terminated by the Company without “Cause” or by Mr. Trask for “Good Reason” within six months before or one year following a “Change in Control” of the Company, Mr. Trask will be entitled to receive, subject to his timely execution and non-revocation of a general release of claims and his continued compliance with his continuing obligations to the Company:

The Agreement also provides that, except as otherwise provided under the applicable equity incentive plan or award agreement, all outstanding time-based equity awards held by Mr. Trask will become fully vested if his employment is terminated by the Company without Cause or by him for Good Reason within one year following a Change in Control. If such a termination occurs within six months before a Change in Control, his outstanding time-based equity awards that remain outstanding immediately before the Change in Control will become fully vested immediately before the Change in Control. To give effect to this provision, applicable unvested time-based equity awards that would otherwise be forfeited upon a qualifying pre-Change in Control termination will remain outstanding through the earlier of the Change in Control or the expiration of the six-month period.

For purposes of the Agreement, a Change in Control generally includes certain acquisitions of 50% or more of the Company’s outstanding voting power, certain mergers or consolidations, stockholder approval of a sale or other disposition of all or substantially all of the Company’s assets, and certain changes in the composition of the Company’s board of directors.

The Agreement provides for a reduction of payments and benefits to the extent necessary to avoid the excise tax imposed by Section 4999 of the Internal Revenue Code, but only if the reduction would result in Mr. Trask retaining a greater after-tax amount. The Agreement does not provide for an excise-tax gross-up.

The severance payments and benefits provided under the Agreement are generally in lieu of, and not in addition to, severance or termination payments or benefits to which Mr. Trask may otherwise be entitled under another Company arrangement, unless the other arrangement expressly provides otherwise. Mr. Trask is not required to mitigate the Company’s obligations by seeking other employment, and amounts payable under the Agreement generally are not subject to offset.

The foregoing description of the Agreement does not purport to be complete and is qualified in its entirety by reference to the full text of the Agreement, which is filed as Exhibit 10.5 to this Quarterly Report on Form 10-Q and incorporated herein by reference.