CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER PURSUANT TO RULE 13a-14(a) / 15d-14(a) OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED
I, Norbert G. Riedel, certify that:
1. | I have reviewed this Quarterly Report on Form 10‑Q for the period ended June 30, 2019 of Aptinyx Inc.; |
b. | any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting. |
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Date: | August 12, 2019 | By: |
| /s/ Norbert G. Riedel |
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| Norbert G. Riedel |
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| President and Chief Executive Officer (Principal Executive Officer) |