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): May 13, 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 execu ...