Exhibit 99.1 Reviva Reports First Quarter 2024 Financial Results and Recent Business Highlights – Gained alignment with U.S. Food and Drug Administration (FDA) on brilaroxazine clinical trials for New Drug Application (NDA) submission in schizophrenia – – Registrational RECOVER-2 trial expected to initiate Q2 2024; topline data expected Q3 2025 – – Topline data from 1-year open-label extension (OLE) trial expected Q4 2024 – Cupertino, Calif., May 14, 2024 – Reviva Pharmaceuticals Holdings, Inc. (NASDAQ: RVP ...

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-K (Mark One) ☒ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2023 or ☐TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from __________ to __________ Commission file number: 001-38634 REVIVA PHARMACEUTICALS HOLDINGS, INC. (Exact name of registrant as specified in its char ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ———————————————————— FORM 10-Q ———————————————————— (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2023 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from ____ to ___ Commission file number: 001-38634 ———————————————————— Reviva Pharmaceuticals Holdings, Inc. (Exact ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-38634 Reviva Pharmaceuticals Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware 85-4306526 (State or ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 001-38634 Reviva Pharmaceuticals Holdings, Inc. (Exact Name of Registrant as Specified in Its Charter) Delaware 85-4306526 (State or O ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2022 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from __________ to __________ Commission file number: 001-38634 REVIVA PHARMACEUTICALS HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 85 ...