Tenax Therapeutics (TENX) 424B3Prospectus supplement

Filed pursuant to Rule 424(b)(3)

SEC File No. 333-269363

PROSPECTUS SUPPLEMENT NO. 15

(to Prospectus dated February 3, 2023)

8,666,666 Shares of Common Stock

Warrants to Purchase up to 17,333,332 Shares of Common Stock

Up to 17,333,332 Shares of Common Stock underlying Warrants

Pre-Funded Warrants to purchase up to 8,666,666 Shares of Common Stock

Up to 8,666,666 Shares of Common Stock underlying Pre-Funded Warrants

Tenax Therapeutics, Inc.

This prospectus supplement updates, amends and supplements the prospectus dated February 3, 2023, as amended by Prospectus Supplement No. 1 dated March 31, 2023, Prospectus Supplement No. 2 dated April 13, 2023, Prospectus Supplement No. 3 dated May 31, 2023, Prospectus Supplement No. 4 dated June 13, 2023, Prospectus Supplement No. 5 dated July 19, 2023, Prospectus Supplement No. 6 dated August 15, 2023, Prospectus Supplement No. 7 dated November 13, 2023, Prospectus Supplement No. 8 dated December 1, 2023, Prospectus Supplement No. 9 dated  January 5, 2024, Prospectus Supplement No. 10 dated January 12, 2024,  Prospectus Supplement No. 11 dated January 19, 2024, Prospectus Supplement No. 12 dated February 8, 2024, Prospectus Supplement No. 13 dated February 8, 2024, and Prospectus Supplement No. 14, dated February 12, 2024. (the “Prospectus”) which forms a part of our Registration Statement on Form S-1 (Registration No. 333-269363).  Capitalized terms used in this prospectus supplement and not otherwise defined herein have the meanings specified in the Prospectus.

This prospectus supplement is being filed to update, amend and supplement the information included in the Prospectus with information contained in our Current Report on Form 8-K filed with the SEC on February 20, 2024, which is set forth below.

This prospectus supplement is not complete without the Prospectus. This prospectus supplement should be read in conjunction with the Prospectus, which is to be delivered with this prospectus supplement, and is qualified by reference thereto, except to the extent that the information in this prospectus supplement updates or supersedes the information contained in the Prospectus. Please keep this prospectus supplement with your Prospectus for future reference.

Our Common Stock is listed on The Nasdaq Capital Market (“Nasdaq”) under the symbol “TENX.” The last reported closing price for our Common Stock on Nasdaq on February 20, 2024 was $3.99 per share. 

Investing in our securities involves a high degree of risk. See “Risk Factors” beginning on page 16 of the Prospectus for a discussion of information that should be considered in connection with an investment in our securities.

Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or passed upon the accuracy or adequacy of the disclosures in the prospectus. Any representation to the contrary is a criminal offense.

The date of this prospectus supplement is February 20, 2024

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K 

CURRENT REPORT

Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): February 19, 2024

101 Glen Lennox Drive, Suite 300

Chapel Hill, NC 27517

(Address of principal executive offices) (Zip Code)

919-855-2100

(Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

Securities registered pursuant to Section 12(b) of the Act:

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR 230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR 240.12b-2).

Emerging growth company ☐ 

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 1.01 Entry into a Material Definitive Agreement.

On February 19, 2024, Tenax Therapeutics, Inc. (the “Company”) and Orion Corporation (“Orion”) entered into an amendment (the “Amendment”) to that certain License Agreement between the Company and Orion dated as of September 20, 2013, as previously amended on October 9, 2020 and January 25, 2022 (the “Agreement”). The Amendment broadened the geographic scope of the original license, granting the Company the exclusive right to develop and commercialize certain levosimendan-based products worldwide, formerly rights limited to Canada and the United States, but excluded the treatment of neurological conditions from the Company’s right of first refusal under the Agreement to obtain rights to develop and commercialize new formulations, routes of administration, dosages, or indications of levosimendan-based products. The Amendment also reduced the tiered royalties based on worldwide net sales of the product by the Company and its sublicensees, increased the Agreement’s existing milestone payment due to Orion upon the grant of United States Food and Drug Administration approval of a levosimendan-based product to $10.0 million and added a milestone payment to Orion of $5.0 million due upon the grant of regulatory approval for a levosimendan-based product in Japan. The Amendment also (i) increased the Company’s obligations to make certain non-refundable commercialization milestone payments to Orion, aggregating to up to $45.0 million, contingent upon achievement of certain cumulative worldwide sales of the product by the Company, and (ii) reduced the maximum price per capsule payable by the Company to Orion, under a yet-to-be-negotiated supply agreement, for the commercial supply of oral levosimendan-based product.

The foregoing summary of the material terms of the Amendment is subject to the full and complete terms of the Amendment, a copy of which is attached to this Current Report on Form 8-K as Exhibit 10.1 and is incorporated herein by reference.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits

*Portions of this Exhibit have been omitted pursuant to Item 601(b)(10)(iv) of Regulation S-K. The Company agrees to furnish supplementally an unredacted copy of this Exhibit to the Securities and Exchange Commission upon request.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.