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 3920 Park Avenue Edison, New Jersey 08820 (Address of principal executive offices, including zip code) Registrant's telephone number, including area code: (732) 225-8400 N/A Date of Report (Date of earliest event reported): May 14, 2024 EOS ENERGY ENTERPRISES, INC. (Exact name of registrant as specified in its charter) Delaware 001-39291 84-42 ...