144 0001921889 XXXXXXXX LIVE 0000886128 FUELCELL ENERGY INC 001-14204 3 GREAT PASTURE ROAD DANBURY CT 06810 2038256000 Feasel Mark Former Officer Common Fidelity Brokerage Services LLC

900 Salem Street Smithfield RI 02917

19084 124651.47 22790931 06/06/2025 NASDAQ Common 12/12/2022 Restricted Stock Vesting Issuer N 164 12/12/2022 Compensation Common 03/24/2023 Restricted Stock Vesting Issuer N 1883 03/24/2023 Compensation Common 06/30/2023 ESPP Purchase Issuer N 8 06/30/2023 Cash Common 12/05/2023 Restricted Stock Vesting Issuer N 504 12/05/2023 Compensation Common 12/11/2023 Restricted Stock Vesting Issuer N 104 12/11/2023 Compensation Common 12/29/2023 ESPP Purchase Issuer N 32 12/29/2023 Cash Common 03/25/2024 Restricted Stock Vesting Issuer N 1326 03/25/2024 Compensation Common 06/28/2024 ESPP Purchase Issuer N 33 06/28/2024 Cash Common 12/05/2024 Restricted Stock Vesting Issuer N 504 12/05/2024 Compensation Common 12/10/2024 Restricted Stock Vesting Issuer N 266 12/10/2024 Compensation Common 12/11/2024 Restricted Stock Vesting Issuer N 1203 12/11/2024 Compensation Common 12/31/2024 ESPP Purchase Issuer N 33 12/31/2024 Cash Common 05/02/2025 Restricted Stock Vesting Issuer N 13024 05/02/2025 Compensation Y 06/06/2025 /s/ Joshua Schmitt, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Mark Feasel.