☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2025 Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 ____________________________________ FORM 10-Q ____________________________________ (Mark One) ☐ 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: 001-40034 _________________ ...

Exhibit 99.1 GRI Bio Reports First Quarter 2025 Financial Results and Confirms GRI-0621 Phase 2a IPF Trial on Track for 6-Week Interim Data in Q2 2025 and Topline Data in Q3 2025 Positive interim 2-week safety and biomarker results from its ongoing Phase 2a study evaluating GRI- 0621 for the treatment of Idiopathic Pulmonary Fibrosis ("IPF") Continued momentum with completed patient enrollment for the 6-week interim analysis (n=24) and over two-thirds enrollment completed for the overall trial Cash runway e ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 17, 2025 GRI BIO, INC. (Exact name of registrant as specified in its charter) | Delaware | 001-40034 | 82-4369909 | | --- | --- | --- | | (State or other jurisdiction | (Commission File Number) | (IRS Employer Identification No.) | | of incorporation) | | | (619) 400-1170 (Registrant's te ...

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) x ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2024 or (Exact name of registrant as specified in its charter) | Delaware | 82-4369909 | | --- | --- | | (State or other jurisdiction of | (I.R.S. Employer Identification No.) | | incorporation and organization) | | | 2223 Avenida de la Playa, #208, La Jolla, CA 92037 | (619 ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 14, 2024 GRI BIO, INC. (Exact name of registrant as specified in its charter) Delaware 001-40034 82-4369909 (State or other jurisdiction (Commission File Number) (IRS Employer Identification No.) of incorporation) 2223 Avenida de la Playa, #208 La Jolla, CA 92037 (Address of principal ...

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 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, 2024 ☐ 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: 001-40034 _____________ ...

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 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, 2024 ☐ 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: 001-40034 __________________ ...

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 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 March 31, 2024 ☐ 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: 001-40034 _________________ ...

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) x 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 001-40034 GRI BIO, INC. (Exact name of registrant as specified in its charter) | Delaware | 82-4369909 | | --- | --- | ...

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 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 ☐ 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: 001-40034 _____________ ...