X0609 4 2026-06-05 0 0001805077 Eos Energy Enterprises, Inc. EOSE 0001614732 DIMITRIEF ALEXANDER false C/O EOS ENERGY ENTERPRISES, INC. 3920 PARK AVENUE EDISON NJ 08820 1 0 0 0 0 Restricted Stock Units 2026-06-05 4 A 0 21253 0 A Common Stock 21253 21253 D Each restricted stock unit ("RSU") represents a contingent right to receive one share of common stock. The reporting person was granted RSUs that settle in cash or common stock, which will vest on the earlier of (i) the first anniversary of the grant date and (ii) immediately prior to the date of the next annual shareholders meeting of the Company following the grant date. Not applicable. /s/ Michael Silberman as attorney-in-fact for Alexander Dimitrief 2026-06-09