X0508 4 2025-12-02 0 0001805077 Eos Energy Enterprises, Inc. EOSE 0002096705 Buczkowski Michelle C/O EOS ENERGY ENTERPRISES, INC. 3920 PARK AVENUE EDISON NJ 08820 0 1 0 0 Chief Administration Officer 0 Restricted Stock Units 2025-12-02 4 A 0 234742 0 A Common Stock 234742 234742 D Each restricted stock unit ("RSU") represents a contingent right to receive one share of common stock. The reporting person received a grant of RSUs under the Issuer's 2020 Incentive Plan, which will vest in three equal installments on each of the first three anniversaries of the grant date, subject to continued service through each vesting date. Not applicable. /s/ Michael Silberman as attorney-in-fact for Michelle Buczkowski 2025-12-04