Exhibit 32.1
CERTIFICATION PURSUANT TO
18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002
I, Daniel J. O'Connor, the president and chief executive officer of Ambrx Biopharma Inc. (the “Company”), certify for the purposes of 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to the best of my knowledge:
Date: March 30, 2023 |
| By: | /s/ Daniel J. O’Connor |
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| Daniel J. O’Connor |
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| President and Chief Executive Officer (Principal Executive Officer) |