Exhibit 31.3
CERTIFICATION OF CHIEF EXECUTIVE OFFICER PURSUANT
TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002
I, Arun Swaminathan Ph.D., certify that:
| 1. | I have reviewed this Amendment No. 1 to the annual report on Form 10-K/A for the period ended December 31, 2024 of Coya Therapeutics, Inc.; and |
| 2. | Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report. |
Date: April 28, 2025
| /s/ Arun Swaminathan, Ph.D. |
| Arun Swaminathan |
| Chief Executive Officer |
| (Principal Executive Officer) |