Exhibit 99.1
Joint Filing Agreement
The undersigned hereby agree that the Statement on Schedule 13G dated September 29, 2025 with respect to the Common Stock, par value $0.0001 per share, of Reviva Pharmaceuticals Holdings, Inc., a Delaware corporation, and any further amendments thereto executed by each and any of the undersigned shall be filed on behalf of each of the undersigned pursuant to and in accordance with the provisions of Rule 13d-1(k)(1) under the Securities Exchange Act of 1934, as amended.
| 683 CAPITAL MANAGEMENT, LLC | ||
| By: |
/s/ Ari Zweiman |
|
| Ari Zweiman, Managing Member | ||
| Date: | 09/29/2025 | |
| 683 CAPITAL PARTNERS, LP | ||
| By: |
/s/ Ari Zweiman |
|
| Ari Zweiman, Authorized Person | ||
| Date: | 09/29/2025 | |
| ARI ZWEIMAN | ||
| By: |
/s/ Ari Zweiman |
|
| Ari Zweiman, Self | ||
| Date: | 09/29/2025 | |