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Exhibit 32.3

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with this Amendment No. 1 to the Annual Report on Form 10-K/A of Eledon Pharmaceuticals, Inc. (the “Company”) for the period ended December 31, 2024 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), the undersigned, David-Alexandre C. Gros, Chief Executive Officer of the Company, hereby certifies, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to the best of his knowledge:

(1).
the Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of
1934; and
(2).
the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

 

Date: August 14, 2025

By:

/s/ David-Alexandre C. Gros, M.D.

 

 

David-Alexandre C. Gros, M.D.

 

 

Chief Executive Officer

(Principal Executive Officer)