X0609 4 2026-07-23 0 0001805077 Eos Energy Enterprises, Inc. EOSE 0001740087 Nigro Joseph false C/O EOS ENERGY ENTERPRISES, INC. TWO ALLEGHENY CENTER, NOVA TOWER 2 PITTSBURGH PA 15212 1 0 0 0 0 Restricted Stock Units 2026-07-23 4 A 0 5942 0 A Common Stock 5942 5942 D Each restricted stock unit ("RSU") represents a contingent right to receive one share of common stock. Granted as part of the Company's annual compensation review process and reflects an adjustment based on benchmarking against market compensation practices. The reporting person was granted RSUs that settle in 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/ Sumeet Puri as attorney-in-fact for Joseph Nigro 2026-07-27