X0609 4 2026-08-24 0 0001805077 Eos Energy Enterprises, Inc. EOSE 0002133360 Lagi Alessandro false C/O EOS ENERGY ENTERPRISES, INC. TWO ALLEGHENY CENTER, NOVA TOWER 2 PITTSBURGH PA 15212 0 1 0 0 Chief Financial Officer 0 Restricted Stock Units 2026-08-24 4 A 0 195130 0 A Common Stock 195130 195130 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 installments on each of the first three anniversaries of the grant date, subject to continued service through each vesting date. Not applicable. /s/ Sumeet Puri as attorney-in-fact for Alessandro Lagi 2026-08-26