FCEL

SEC source: 0000897069-25-001803 · form4.xml · nonDerivative · entry 1

Dolger Joshua · CIK 0001868593 · General Counsel & Corp Sec

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,244

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Restricted stock units were converted into common stock on a one-for-one basis.

SEC source: 0000897069-25-001801 · form4.xml · derivative · entry 3

Few Jason · CIK 0001408158 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,818

Underlying: Common Stock · 11,818 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Restricted stock units were converted into common stock on a one-for-one basis.

F3 · derivative.exercise_date: On December 11, 2023, the reporting person was granted restricted stock units, which vest 1/3 on each of the first, second and third anniversaries of the date of grant, subject to continued employment.

F3 · derivative.expiration_date: On December 11, 2023, the reporting person was granted restricted stock units, which vest 1/3 on each of the first, second and third anniversaries of the date of grant, subject to continued employment.

SEC source: 0000897069-25-001801 · form4.xml · nonDerivative · entry 2

Few Jason · CIK 0001408158 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 51,565

F2 · kind: Represents shares withheld to satisfy tax obligations upon the vesting of restricted stock units.

SEC source: 0000897069-25-001801 · form4.xml · nonDerivative · entry 1

Few Jason · CIK 0001408158 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 55,269

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Restricted stock units were converted into common stock on a one-for-one basis.

SEC source: 0000897069-25-001786 · form4.xml · derivative · entry 6

Few Jason · CIK 0001408158 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 5,135 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · derivative.exercise_price: Shares were issued in settlement of earned performance share units.

F1 · shares: Reflects the 1-for-30 reverse stock split effected by the Issuer on November 8, 2024.

F7 · derivative.exercise_date: On December 05, 2022, the reporting person was granted performance shares which were based on performance over the three-year performance period ended October 31, 2025, subject to continued employment until the third anniversary of the grant date (December 5, 2025). The performance goal was the TSR of the Company relative to the TSR of the Russell 2000 during the performance period. The Compensation and Leadership Development Committee certified achievement at 36.77% of the target number previously reported (as adjusted to reflect the 1-for-30 reverse stock split effected by the Issuer on November 8, 2024), resulting in the award of 5,135 shares.

F7 · derivative.expiration_date: On December 05, 2022, the reporting person was granted performance shares which were based on performance over the three-year performance period ended October 31, 2025, subject to continued employment until the third anniversary of the grant date (December 5, 2025). The performance goal was the TSR of the Company relative to the TSR of the Russell 2000 during the performance period. The Compensation and Leadership Development Committee certified achievement at 36.77% of the target number previously reported (as adjusted to reflect the 1-for-30 reverse stock split effected by the Issuer on November 8, 2024), resulting in the award of 5,135 shares.

F1 · derivative.underlying_shares: Reflects the 1-for-30 reverse stock split effected by the Issuer on November 8, 2024.

SEC source: 0000897069-25-001786 · form4.xml · derivative · entry 5

Few Jason · CIK 0001408158 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 4,654 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Restricted stock units were converted into common stock on a one-for-one basis.

F1 · shares: Reflects the 1-for-30 reverse stock split effected by the Issuer on November 8, 2024.

F6 · derivative.exercise_date: On December 05, 2022, the reporting person was granted restricted stock units, which vested 1/3 on each of the first, second and third anniversaries of the date of grant, subject to continued employment.

F6 · derivative.expiration_date: On December 05, 2022, the reporting person was granted restricted stock units, which vested 1/3 on each of the first, second and third anniversaries of the date of grant, subject to continued employment.

F1 · derivative.underlying_shares: Reflects the 1-for-30 reverse stock split effected by the Issuer on November 8, 2024.

SEC source: 0000897069-25-001786 · form4.xml · nonDerivative · entry 4

Few Jason · CIK 0001408158 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 43,451

F5 · kind: Represents shares withheld to satisfy tax obligations upon the vesting of performance share units.

SEC source: 0000897069-25-001786 · form4.xml · nonDerivative · entry 3

Few Jason · CIK 0001408158 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 45,061

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · shares: Reflects the 1-for-30 reverse stock split effected by the Issuer on November 8, 2024.

F4 · price: Shares were issued in settlement of earned performance share units.

SEC source: 0000897069-25-001786 · form4.xml · nonDerivative · entry 2

Few Jason · CIK 0001408158 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 39,926

F3 · kind: Represents shares withheld to satisfy tax obligations upon the vesting of restricted stock units.

SEC source: 0000897069-25-001786 · form4.xml · nonDerivative · entry 1

Few Jason · CIK 0001408158 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 41,385

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · shares: Reflects the 1-for-30 reverse stock split effected by the Issuer on November 8, 2024.

F2 · price: Restricted stock units were converted into common stock on a one-for-one basis.

SEC source: 0000897069-25-001784 · form4.xml · derivative · entry 6

Dolger Joshua · CIK 0001868593 · General Counsel & Corp Sec

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 898 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F5 · derivative.exercise_price: Shares were issued in settlement of earned performance share units.

F1 · shares: Reflects the 1-for-30 reverse stock split effected by the Issuer on November 8, 2024.

F8 · derivative.exercise_date: On December 05, 2022, the reporting person was granted performance shares which were based on performance over the three-year performance period ended October 31, 2025, subject to continued employment until the third anniversary of the grant date December 5, 2025. The performance goal was the TSR of the Company relative to the TSR of the Russell 2000 during the performance period. The Compensation and Leadership Development Committee certified achievement at 36.77% of the target number previously reported (as adjusted to reflect the 1-for-30 reverse stock split effected by the Issuer on November 8, 2024), resulting in the award of 898 shares.

F8 · derivative.expiration_date: On December 05, 2022, the reporting person was granted performance shares which were based on performance over the three-year performance period ended October 31, 2025, subject to continued employment until the third anniversary of the grant date December 5, 2025. The performance goal was the TSR of the Company relative to the TSR of the Russell 2000 during the performance period. The Compensation and Leadership Development Committee certified achievement at 36.77% of the target number previously reported (as adjusted to reflect the 1-for-30 reverse stock split effected by the Issuer on November 8, 2024), resulting in the award of 898 shares.

F1 · derivative.underlying_shares: Reflects the 1-for-30 reverse stock split effected by the Issuer on November 8, 2024.

SEC source: 0000897069-25-001784 · form4.xml · derivative · entry 5

Dolger Joshua · CIK 0001868593 · General Counsel & Corp Sec

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 813 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Restricted stock units were converted into common stock on a one-for-one basis.

F1 · shares: Reflects the 1-for-30 reverse stock split effected by the Issuer on November 8, 2024.

F7 · derivative.exercise_date: On December 05, 2022, the reporting person was granted restricted stock units, which vested 1/3 on each of the first, second and third anniversaries of the date of grant, subject to continued employment.

F7 · derivative.expiration_date: On December 05, 2022, the reporting person was granted restricted stock units, which vested 1/3 on each of the first, second and third anniversaries of the date of grant, subject to continued employment.

F1 · derivative.underlying_shares: Reflects the 1-for-30 reverse stock split effected by the Issuer on November 8, 2024.

SEC source: 0000897069-25-001784 · form4.xml · nonDerivative · entry 4

Dolger Joshua · CIK 0001868593 · General Counsel & Corp Sec

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,719

F6 · kind: Represents shares withheld to satisfy tax obligations upon the vesting of performance share units.

F3 · balance_after: Includes 305 shares purchased by the reporting person under the FuelCell Energy, Inc. Employee Stock Purchase Plan.

SEC source: 0000897069-25-001784 · form4.xml · nonDerivative · entry 3

Dolger Joshua · CIK 0001868593 · General Counsel & Corp Sec

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,001

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · shares: Reflects the 1-for-30 reverse stock split effected by the Issuer on November 8, 2024.

F5 · price: Shares were issued in settlement of earned performance share units.

F3 · balance_after: Includes 305 shares purchased by the reporting person under the FuelCell Energy, Inc. Employee Stock Purchase Plan.

SEC source: 0000897069-25-001784 · form4.xml · nonDerivative · entry 2

Dolger Joshua · CIK 0001868593 · General Counsel & Corp Sec

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,103

F4 · kind: Represents shares withheld to satisfy tax obligations upon the vesting of restricted stock units.

F3 · balance_after: Includes 305 shares purchased by the reporting person under the FuelCell Energy, Inc. Employee Stock Purchase Plan.

SEC source: 0000897069-25-001784 · form4.xml · nonDerivative · entry 1

Dolger Joshua · CIK 0001868593 · General Counsel & Corp Sec

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,358

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · shares: Reflects the 1-for-30 reverse stock split effected by the Issuer on November 8, 2024.

F2 · price: Restricted stock units were converted into common stock on a one-for-one basis.

F3 · balance_after: Includes 305 shares purchased by the reporting person under the FuelCell Energy, Inc. Employee Stock Purchase Plan.

SEC source: 0000897069-25-001782 · form4.xml · derivative · entry 6

Bishop Michael S. · CIK 0001523478 · EVP, TREASURER & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 1,167 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · derivative.exercise_price: Shares were issued in settlement of earned performance share units.

F1 · shares: Reflects the 1-for-30 reverse stock split effected by the Issuer on November 8, 2024.

F7 · derivative.exercise_date: On December 05, 2022, the reporting person was granted performance shares which were based on performance over the three-year performance period ended October 31, 2025, subject to continued employment until the third anniversary of the grant date (December 5, 2025). The performance goal was the TSR of the Company relative to the TSR of the Russell 2000 during the performance period. The Compensation and Leadership Development Committee certified achievement at 36.77% of the target number previously reported (as adjusted to reflect the 1-for-30 reverse stock split effected by the Issuer on November 8, 2024), resulting in the award of 1,167 shares.

F7 · derivative.expiration_date: On December 05, 2022, the reporting person was granted performance shares which were based on performance over the three-year performance period ended October 31, 2025, subject to continued employment until the third anniversary of the grant date (December 5, 2025). The performance goal was the TSR of the Company relative to the TSR of the Russell 2000 during the performance period. The Compensation and Leadership Development Committee certified achievement at 36.77% of the target number previously reported (as adjusted to reflect the 1-for-30 reverse stock split effected by the Issuer on November 8, 2024), resulting in the award of 1,167 shares.

F1 · derivative.underlying_shares: Reflects the 1-for-30 reverse stock split effected by the Issuer on November 8, 2024.

SEC source: 0000897069-25-001782 · form4.xml · derivative · entry 5

Bishop Michael S. · CIK 0001523478 · EVP, TREASURER & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 1,057 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Restricted stock units were converted into common stock on a one-for-one basis.

F1 · shares: Reflects the 1-for-30 reverse stock split effected by the Issuer on November 8, 2024.

F6 · derivative.exercise_date: On December 05, 2022, the reporting person was granted restricted stock units, which vested 1/3 on each of the first, second and third anniversaries of the date of grant, subject to continued employment.

F6 · derivative.expiration_date: On December 05, 2022, the reporting person was granted restricted stock units, which vested 1/3 on each of the first, second and third anniversaries of the date of grant, subject to continued employment.

F1 · derivative.underlying_shares: Reflects the 1-for-30 reverse stock split effected by the Issuer on November 8, 2024.

SEC source: 0000897069-25-001782 · form4.xml · nonDerivative · entry 4

Bishop Michael S. · CIK 0001523478 · EVP, TREASURER & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,607

F5 · kind: Represents shares withheld to satisfy tax obligations upon the vesting of performance share units.

SEC source: 0000897069-25-001782 · form4.xml · nonDerivative · entry 3

Bishop Michael S. · CIK 0001523478 · EVP, TREASURER & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,973

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · shares: Reflects the 1-for-30 reverse stock split effected by the Issuer on November 8, 2024.

F4 · price: Shares were issued in settlement of earned performance share units.

SEC source: 0000897069-25-001782 · form4.xml · nonDerivative · entry 2

Bishop Michael S. · CIK 0001523478 · EVP, TREASURER & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,806

F3 · kind: Represents shares withheld to satisfy tax obligations upon the vesting of restricted stock units.

SEC source: 0000897069-25-001782 · form4.xml · nonDerivative · entry 1

Bishop Michael S. · CIK 0001523478 · EVP, TREASURER & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,138

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · shares: Reflects the 1-for-30 reverse stock split effected by the Issuer on November 8, 2024.

F2 · price: Restricted stock units were converted into common stock on a one-for-one basis.

SEC source: 0000897069-25-001751 · form4.xml · derivative · entry 2

Few Jason · CIK 0001408158 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 111,695

Underlying: Common Stock · 111,695 shares

Expires not disclosed

F3 · derivative.exercise_price: Each performance share unit represents a contingent right to receive one share of common stock or the equivalent cash value upon vesting of the performance share unit.

F4 · derivative.exercise_date: On November 28, 2025, the reporting person was granted performance share units that will be earned based on the Company's total shareholder return ("TSR") performance during the fiscal year 2026, fiscal years 2026-2027 and fiscal years 2026-2028 performance periods, subject to continued employment until the third anniversary of the grant date. The number of performance share units reported is the target number; up to 235% of the target number may be earned based on TSR performance.

F4 · derivative.expiration_date: On November 28, 2025, the reporting person was granted performance share units that will be earned based on the Company's total shareholder return ("TSR") performance during the fiscal year 2026, fiscal years 2026-2027 and fiscal years 2026-2028 performance periods, subject to continued employment until the third anniversary of the grant date. The number of performance share units reported is the target number; up to 235% of the target number may be earned based on TSR performance.

SEC source: 0000897069-25-001751 · form4.xml · derivative · entry 1

Few Jason · CIK 0001408158 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 111,695

Underlying: Common Stock · 111,695 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of common stock or the equivalent cash value upon vesting of the restricted stock unit.

F2 · derivative.exercise_date: On November 28, 2025, the reporting person was granted restricted stock units, which vest 1/3 on each of the first, second and third anniversaries of the date of grant, subject to continued employment.

F2 · derivative.expiration_date: On November 28, 2025, the reporting person was granted restricted stock units, which vest 1/3 on each of the first, second and third anniversaries of the date of grant, subject to continued employment.

SEC source: 0000897069-25-001747 · form4.xml · derivative · entry 2

Dolger Joshua · CIK 0001868593 · General Counsel & Corp Sec

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 36,137

Underlying: Common Stock · 36,137 shares

Expires not disclosed

F3 · derivative.exercise_price: Each performance share unit represents a contingent right to receive one share of common stock or the equivalent cash value upon vesting of the performance share unit.

F4 · derivative.exercise_date: On November 28, 2025, the reporting person was granted performance share units that will be earned based on the Company's total shareholder return ("TSR") performance during the fiscal year 2026, fiscal years 2026-2027 and fiscal years 2026-2028 performance periods, subject to continued employment until the third anniversary of the grant date. The number of performance share units reported is the target number; up to 235% of the target number may be earned based on TSR performance.

F4 · derivative.expiration_date: On November 28, 2025, the reporting person was granted performance share units that will be earned based on the Company's total shareholder return ("TSR") performance during the fiscal year 2026, fiscal years 2026-2027 and fiscal years 2026-2028 performance periods, subject to continued employment until the third anniversary of the grant date. The number of performance share units reported is the target number; up to 235% of the target number may be earned based on TSR performance.

SEC source: 0000897069-25-001747 · form4.xml · derivative · entry 1

Dolger Joshua · CIK 0001868593 · General Counsel & Corp Sec

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 36,136

Underlying: Common Stock · 36,136 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of common stock or the equivalent cash value upon vesting of the restricted stock unit.

F2 · derivative.exercise_date: On November 28, 2025, the reporting person was granted restricted stock units, which vest 1/3 on each of the first, second and third anniversaries of the date of grant, subject to continued employment.

F2 · derivative.expiration_date: On November 28, 2025, the reporting person was granted restricted stock units, which vest 1/3 on each of the first, second and third anniversaries of the date of grant, subject to continued employment.

SEC source: 0000897069-25-001749 · form4.xml · derivative · entry 2

Achanta Shankar · CIK 0002051411 · EVP, Chf. Product &Tech Ofc.

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 36,137

Underlying: Common Stock · 36,137 shares

Expires not disclosed

F3 · derivative.exercise_price: Each performance share unit represents a contingent right to receive one share of common stock or the equivalent cash value upon vesting of the performance share unit.

F4 · derivative.exercise_date: On November 28, 2025, the reporting person was granted performance share units that will be earned based on the Company's total shareholder return ("TSR") performance during the fiscal year 2026, fiscal years 2026-2027 and fiscal years 2026-2028 performance periods, subject to continued employment until the third anniversary of the grant date. The number of performance share units reported is the target number; up to 235% of the target number may be earned based on TSR performance.

F4 · derivative.expiration_date: On November 28, 2025, the reporting person was granted performance share units that will be earned based on the Company's total shareholder return ("TSR") performance during the fiscal year 2026, fiscal years 2026-2027 and fiscal years 2026-2028 performance periods, subject to continued employment until the third anniversary of the grant date. The number of performance share units reported is the target number; up to 235% of the target number may be earned based on TSR performance.

SEC source: 0000897069-25-001749 · form4.xml · derivative · entry 1

Achanta Shankar · CIK 0002051411 · EVP, Chf. Product &Tech Ofc.

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 36,136

Underlying: Common Stock · 36,136 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of common stock or the equivalent cash value upon vesting of the restricted stock unit.

F2 · derivative.exercise_date: On November 28, 2025, the reporting person was granted restricted stock units, which vest 1/3 on each of the first, second and third anniversaries of the date of grant, subject to continued employment.

F2 · derivative.expiration_date: On November 28, 2025, the reporting person was granted restricted stock units, which vest 1/3 on each of the first, second and third anniversaries of the date of grant, subject to continued employment.

SEC source: 0000897069-25-001745 · form4.xml · derivative · entry 2

Bishop Michael S. · CIK 0001523478 · EVP, TREASURER & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 52,562

Underlying: Common Stock · 52,562 shares

Expires not disclosed

F3 · derivative.exercise_price: Each performance share unit represents a contingent right to receive one share of common stock or the equivalent cash value upon vesting of the performance share unit.

F4 · derivative.exercise_date: On November 28, 2025, the reporting person was granted performance share units that will be earned based on the Company's total shareholder return ("TSR") performance during the fiscal year 2026, fiscal years 2026-2027 and fiscal years 2026-2028 performance periods, subject to continued employment until the third anniversary of the grant date. The number of performance share units reported is the target number; up to 235% of the target number may be earned based on TSR performance.

F4 · derivative.expiration_date: On November 28, 2025, the reporting person was granted performance share units that will be earned based on the Company's total shareholder return ("TSR") performance during the fiscal year 2026, fiscal years 2026-2027 and fiscal years 2026-2028 performance periods, subject to continued employment until the third anniversary of the grant date. The number of performance share units reported is the target number; up to 235% of the target number may be earned based on TSR performance.

SEC source: 0000897069-25-001745 · form4.xml · derivative · entry 1

Bishop Michael S. · CIK 0001523478 · EVP, TREASURER & CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 52,562

Underlying: Common Stock · 52,562 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of common stock or the equivalent cash value upon vesting of the restricted stock unit.

F2 · derivative.exercise_date: On November 28, 2025, the reporting person was granted restricted stock units, which vest 1/3 on each of the first, second and third anniversaries of the date of grant, subject to continued employment.

F2 · derivative.expiration_date: On November 28, 2025, the reporting person was granted restricted stock units, which vest 1/3 on each of the first, second and third anniversaries of the date of grant, subject to continued employment.

SEC source: 0000897069-25-001582 · form4.xml · derivative · entry 1

Hansen Cynthia L · CIK 0001629601 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 40,563

Underlying: Common Stock · 1,576 shares

Expires not disclosed

F1 · derivative.exercise_price: Represents director retainer and committee fees paid in stock pursuant to the FuelCell Energy, Inc. Director Compensation Program. As such fees are being deferred pursuant to the FuelCell Energy, Inc. Directors Deferred Compensation Plan, deferred common stock units are being issued to the reporting person. In accordance with elections made by the reporting person under the Directors Deferred Compensation Plan, the shares of common stock underlying the common stock units are payable to the reporting person, on a one-for-one basis (i.e., one share of common stock for each common stock unit), upon separation from service as a director.

F1 · derivative.exercise_date: Represents director retainer and committee fees paid in stock pursuant to the FuelCell Energy, Inc. Director Compensation Program. As such fees are being deferred pursuant to the FuelCell Energy, Inc. Directors Deferred Compensation Plan, deferred common stock units are being issued to the reporting person. In accordance with elections made by the reporting person under the Directors Deferred Compensation Plan, the shares of common stock underlying the common stock units are payable to the reporting person, on a one-for-one basis (i.e., one share of common stock for each common stock unit), upon separation from service as a director.

F1 · derivative.expiration_date: Represents director retainer and committee fees paid in stock pursuant to the FuelCell Energy, Inc. Director Compensation Program. As such fees are being deferred pursuant to the FuelCell Energy, Inc. Directors Deferred Compensation Plan, deferred common stock units are being issued to the reporting person. In accordance with elections made by the reporting person under the Directors Deferred Compensation Plan, the shares of common stock underlying the common stock units are payable to the reporting person, on a one-for-one basis (i.e., one share of common stock for each common stock unit), upon separation from service as a director.

SEC source: 0000897069-25-001580 · form4.xml · derivative · entry 1

England James Herbert · CIK 0001437823 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 61,227

Underlying: Common Stock · 2,743 shares

Expires not disclosed

F1 · derivative.exercise_price: Represents director retainer and committee fees paid in stock pursuant to the FuelCell Energy, Inc. Director Compensation Program. As such fees are being deferred pursuant to the FuelCell Energy, Inc. Directors Deferred Compensation Plan, deferred common stock units are being issued to the reporting person. In accordance with elections made by the reporting person under the Directors Deferred Compensation Plan, the shares of common stock underlying the common stock units are payable to the reporting person, on a one-for-one basis (i.e., one share of common stock for each common stock unit), upon separation from service as a director.

F1 · derivative.exercise_date: Represents director retainer and committee fees paid in stock pursuant to the FuelCell Energy, Inc. Director Compensation Program. As such fees are being deferred pursuant to the FuelCell Energy, Inc. Directors Deferred Compensation Plan, deferred common stock units are being issued to the reporting person. In accordance with elections made by the reporting person under the Directors Deferred Compensation Plan, the shares of common stock underlying the common stock units are payable to the reporting person, on a one-for-one basis (i.e., one share of common stock for each common stock unit), upon separation from service as a director.

F1 · derivative.expiration_date: Represents director retainer and committee fees paid in stock pursuant to the FuelCell Energy, Inc. Director Compensation Program. As such fees are being deferred pursuant to the FuelCell Energy, Inc. Directors Deferred Compensation Plan, deferred common stock units are being issued to the reporting person. In accordance with elections made by the reporting person under the Directors Deferred Compensation Plan, the shares of common stock underlying the common stock units are payable to the reporting person, on a one-for-one basis (i.e., one share of common stock for each common stock unit), upon separation from service as a director.

SEC source: 0000897069-25-001172 · form4.xml · derivative · entry 1

Hansen Cynthia L · CIK 0001629601 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 38,987

Underlying: Common Stock · 3,283 shares

Expires not disclosed

F1 · derivative.exercise_price: Represents director retainer and committee fees paid in stock pursuant to the FuelCell Energy, Inc. Director Compensation Program. As such fees are being deferred pursuant to the FuelCell Energy, Inc. Directors Deferred Compensation Plan, deferred common stock units are being issued to the reporting person. In accordance with elections made by the reporting person under the Directors Deferred Compensation Plan, the shares of common stock underlying the common stock units are payable to the reporting person, on a one-for-one basis (i.e., one share of common stock for each common stock unit), upon separation from service as a director.

F1 · derivative.exercise_date: Represents director retainer and committee fees paid in stock pursuant to the FuelCell Energy, Inc. Director Compensation Program. As such fees are being deferred pursuant to the FuelCell Energy, Inc. Directors Deferred Compensation Plan, deferred common stock units are being issued to the reporting person. In accordance with elections made by the reporting person under the Directors Deferred Compensation Plan, the shares of common stock underlying the common stock units are payable to the reporting person, on a one-for-one basis (i.e., one share of common stock for each common stock unit), upon separation from service as a director.

F1 · derivative.expiration_date: Represents director retainer and committee fees paid in stock pursuant to the FuelCell Energy, Inc. Director Compensation Program. As such fees are being deferred pursuant to the FuelCell Energy, Inc. Directors Deferred Compensation Plan, deferred common stock units are being issued to the reporting person. In accordance with elections made by the reporting person under the Directors Deferred Compensation Plan, the shares of common stock underlying the common stock units are payable to the reporting person, on a one-for-one basis (i.e., one share of common stock for each common stock unit), upon separation from service as a director.

SEC source: 0000897069-25-001170 · form4.xml · derivative · entry 1

England James Herbert · CIK 0001437823 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 58,484

Underlying: Common Stock · 5,715 shares

Expires not disclosed

F1 · derivative.exercise_price: Represents director retainer and committee fees paid in stock pursuant to the FuelCell Energy, Inc. Director Compensation Program. As such fees are being deferred pursuant to the FuelCell Energy, Inc. Directors Deferred Compensation Plan, deferred common stock units are being issued to the reporting person. In accordance with elections made by the reporting person under the Directors Deferred Compensation Plan, the shares of common stock underlying the common stock units are payable to the reporting person, on a one-for-one basis (i.e., one share of common stock for each common stock unit), upon separation from service as a director.

F1 · derivative.exercise_date: Represents director retainer and committee fees paid in stock pursuant to the FuelCell Energy, Inc. Director Compensation Program. As such fees are being deferred pursuant to the FuelCell Energy, Inc. Directors Deferred Compensation Plan, deferred common stock units are being issued to the reporting person. In accordance with elections made by the reporting person under the Directors Deferred Compensation Plan, the shares of common stock underlying the common stock units are payable to the reporting person, on a one-for-one basis (i.e., one share of common stock for each common stock unit), upon separation from service as a director.

F1 · derivative.expiration_date: Represents director retainer and committee fees paid in stock pursuant to the FuelCell Energy, Inc. Director Compensation Program. As such fees are being deferred pursuant to the FuelCell Energy, Inc. Directors Deferred Compensation Plan, deferred common stock units are being issued to the reporting person. In accordance with elections made by the reporting person under the Directors Deferred Compensation Plan, the shares of common stock underlying the common stock units are payable to the reporting person, on a one-for-one basis (i.e., one share of common stock for each common stock unit), upon separation from service as a director.

SEC source: 0000897069-25-000967 · form4.xml · derivative · entry 3

Achanta Shankar · CIK 0002051411 · EVP, Chf. Product &Tech Ofc.

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,040

Underlying: Common Stock · 2,020 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Restricted stock units convert into common stock on a one-for-one basis.

F3 · derivative.exercise_date: On May 8, 2024, the reporting person was granted restricted stock units, which vest 1/3 on each of the first three anniversaries of the date of grant, subject to continued employment.

F3 · derivative.expiration_date: On May 8, 2024, the reporting person was granted restricted stock units, which vest 1/3 on each of the first three anniversaries of the date of grant, subject to continued employment.

SEC source: 0000897069-25-000967 · form4.xml · nonDerivative · entry 2

Achanta Shankar · CIK 0002051411 · EVP, Chf. Product &Tech Ofc.

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,528

F2 · kind: Represents shares withheld to satisfy tax obligations upon the vesting of restricted stock units.

SEC source: 0000897069-25-000967 · form4.xml · nonDerivative · entry 1

Achanta Shankar · CIK 0002051411 · EVP, Chf. Product &Tech Ofc.

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,020

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Restricted stock units convert into common stock on a one-for-one basis.

SEC source: 0000897069-25-000869 · form4.xml · derivative · entry 2

Hansen Cynthia L · CIK 0001629601 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 35,704

Underlying: Common Stock · 23,859 shares

Expires not disclosed

F3 · derivative.exercise_price: Deferred common stock units issued to the reporting person pursuant to the FuelCell Energy, Inc. Directors Deferred Compensation Plan. In accordance with elections made by the reporting person under the Directors Deferred Compensation Plan, the shares of common stock underlying the common stock units are payable to the reporting person, on a one-for-one basis (i.e., one share of common stock for each common stock unit), upon separation from service as a director.

F3 · derivative.exercise_date: Deferred common stock units issued to the reporting person pursuant to the FuelCell Energy, Inc. Directors Deferred Compensation Plan. In accordance with elections made by the reporting person under the Directors Deferred Compensation Plan, the shares of common stock underlying the common stock units are payable to the reporting person, on a one-for-one basis (i.e., one share of common stock for each common stock unit), upon separation from service as a director.

F3 · derivative.expiration_date: Deferred common stock units issued to the reporting person pursuant to the FuelCell Energy, Inc. Directors Deferred Compensation Plan. In accordance with elections made by the reporting person under the Directors Deferred Compensation Plan, the shares of common stock underlying the common stock units are payable to the reporting person, on a one-for-one basis (i.e., one share of common stock for each common stock unit), upon separation from service as a director.

F2 · balance_after: Reflects the 1-for-30 reverse stock split effected by the Issuer on November 8, 2024.

SEC source: 0000897069-25-000869 · form4.xml · derivative · entry 1

Hansen Cynthia L · CIK 0001629601 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,845

Underlying: Common Stock · 4,383 shares

Expires not disclosed

F1 · derivative.exercise_price: Represents director retainer and committee fees paid in stock pursuant to the FuelCell Energy, Inc. Director Compensation Program. As such fees are being deferred pursuant to the FuelCell Energy, Inc. Directors Deferred Compensation Plan, deferred common stock units are being issued to the reporting person. In accordance with elections made by the reporting person under the Directors Deferred Compensation Plan, the shares of common stock underlying the common stock units are payable to the reporting person, on a one-for-one basis (i.e., one share of common stock for each common stock unit), upon separation from service as a director.

F1 · derivative.exercise_date: Represents director retainer and committee fees paid in stock pursuant to the FuelCell Energy, Inc. Director Compensation Program. As such fees are being deferred pursuant to the FuelCell Energy, Inc. Directors Deferred Compensation Plan, deferred common stock units are being issued to the reporting person. In accordance with elections made by the reporting person under the Directors Deferred Compensation Plan, the shares of common stock underlying the common stock units are payable to the reporting person, on a one-for-one basis (i.e., one share of common stock for each common stock unit), upon separation from service as a director.

F1 · derivative.expiration_date: Represents director retainer and committee fees paid in stock pursuant to the FuelCell Energy, Inc. Director Compensation Program. As such fees are being deferred pursuant to the FuelCell Energy, Inc. Directors Deferred Compensation Plan, deferred common stock units are being issued to the reporting person. In accordance with elections made by the reporting person under the Directors Deferred Compensation Plan, the shares of common stock underlying the common stock units are payable to the reporting person, on a one-for-one basis (i.e., one share of common stock for each common stock unit), upon separation from service as a director.

F2 · balance_after: Reflects the 1-for-30 reverse stock split effected by the Issuer on November 8, 2024.

SEC source: 0000897069-25-000867 · form4.xml · derivative · entry 2

England James Herbert · CIK 0001437823 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 52,769

Underlying: Common Stock · 23,859 shares

Expires not disclosed

F2 · derivative.exercise_price: Deferred common stock units issued to the reporting person pursuant to the FuelCell Energy, Inc. Directors Deferred Compensation Plan. In accordance with elections made by the reporting person under the Directors Deferred Compensation Plan, the shares of common stock underlying the common stock units are payable to the reporting person, on a one-for-one basis (i.e., one share of common stock for each common stock unit), upon separation from service as a director.

F2 · derivative.exercise_date: Deferred common stock units issued to the reporting person pursuant to the FuelCell Energy, Inc. Directors Deferred Compensation Plan. In accordance with elections made by the reporting person under the Directors Deferred Compensation Plan, the shares of common stock underlying the common stock units are payable to the reporting person, on a one-for-one basis (i.e., one share of common stock for each common stock unit), upon separation from service as a director.

F2 · derivative.expiration_date: Deferred common stock units issued to the reporting person pursuant to the FuelCell Energy, Inc. Directors Deferred Compensation Plan. In accordance with elections made by the reporting person under the Directors Deferred Compensation Plan, the shares of common stock underlying the common stock units are payable to the reporting person, on a one-for-one basis (i.e., one share of common stock for each common stock unit), upon separation from service as a director.

SEC source: 0000897069-25-000867 · form4.xml · derivative · entry 1

England James Herbert · CIK 0001437823 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 28,910

Underlying: Common Stock · 7,630 shares

Expires not disclosed

F1 · derivative.exercise_price: Represents director retainer and committee fees paid in stock pursuant to the FuelCell Energy, Inc. Director Compensation Program. As such fees are being deferred pursuant to the FuelCell Energy, Inc. Directors Deferred Compensation Plan, deferred common stock units are being issued to the reporting person. In accordance with elections made by the reporting person under the Directors Deferred Compensation Plan, the shares of common stock underlying the common stock units are payable to the reporting person, on a one-for-one basis (i.e., one share of common stock for each common stock unit), upon separation from service as a director.

F1 · derivative.exercise_date: Represents director retainer and committee fees paid in stock pursuant to the FuelCell Energy, Inc. Director Compensation Program. As such fees are being deferred pursuant to the FuelCell Energy, Inc. Directors Deferred Compensation Plan, deferred common stock units are being issued to the reporting person. In accordance with elections made by the reporting person under the Directors Deferred Compensation Plan, the shares of common stock underlying the common stock units are payable to the reporting person, on a one-for-one basis (i.e., one share of common stock for each common stock unit), upon separation from service as a director.

F1 · derivative.expiration_date: Represents director retainer and committee fees paid in stock pursuant to the FuelCell Energy, Inc. Director Compensation Program. As such fees are being deferred pursuant to the FuelCell Energy, Inc. Directors Deferred Compensation Plan, deferred common stock units are being issued to the reporting person. In accordance with elections made by the reporting person under the Directors Deferred Compensation Plan, the shares of common stock underlying the common stock units are payable to the reporting person, on a one-for-one basis (i.e., one share of common stock for each common stock unit), upon separation from service as a director.

SEC source: 0000897069-25-000865 · form4.xml · derivative · entry 1

von Althann Natica · CIK 0001477502 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 23,859

Underlying: Common Stock · 23,859 shares

Expires not disclosed

F1 · derivative.exercise_price: These restricted stock units (i) vest on the date of the regularly scheduled annual meeting of the stockholders of the Issuer to be held in 2026, and (ii) are to be settled in cash or in shares of the Company's common stock, at the discretion of the Compensation and Leadership Development Committee, as the administrator under the 2018 Omnibus Incentive Plan, as amended and restated.

F1 · derivative.exercise_date: These restricted stock units (i) vest on the date of the regularly scheduled annual meeting of the stockholders of the Issuer to be held in 2026, and (ii) are to be settled in cash or in shares of the Company's common stock, at the discretion of the Compensation and Leadership Development Committee, as the administrator under the 2018 Omnibus Incentive Plan, as amended and restated.

F1 · derivative.expiration_date: These restricted stock units (i) vest on the date of the regularly scheduled annual meeting of the stockholders of the Issuer to be held in 2026, and (ii) are to be settled in cash or in shares of the Company's common stock, at the discretion of the Compensation and Leadership Development Committee, as the administrator under the 2018 Omnibus Incentive Plan, as amended and restated.

SEC source: 0000897069-25-000863 · form4.xml · derivative · entry 1

HILZINGER MATTHEW F · CIK 0001184017 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 32,129

Underlying: Common Stock · 23,859 shares

Expires not disclosed

F1 · derivative.exercise_price: Deferred common stock units issued to the reporting person pursuant to the FuelCell Energy, Inc. Directors Deferred Compensation Plan. In accordance with elections made by the reporting person under the Directors Deferred Compensation Plan, the shares of common stock underlying the common stock units are payable to the reporting person, on a one-for-one basis (i.e., one share of common stock for each common stock unit), upon separation from service as a director.

F1 · derivative.exercise_date: Deferred common stock units issued to the reporting person pursuant to the FuelCell Energy, Inc. Directors Deferred Compensation Plan. In accordance with elections made by the reporting person under the Directors Deferred Compensation Plan, the shares of common stock underlying the common stock units are payable to the reporting person, on a one-for-one basis (i.e., one share of common stock for each common stock unit), upon separation from service as a director.

F1 · derivative.expiration_date: Deferred common stock units issued to the reporting person pursuant to the FuelCell Energy, Inc. Directors Deferred Compensation Plan. In accordance with elections made by the reporting person under the Directors Deferred Compensation Plan, the shares of common stock underlying the common stock units are payable to the reporting person, on a one-for-one basis (i.e., one share of common stock for each common stock unit), upon separation from service as a director.

F2 · balance_after: Reflects the 1-for-30 reverse stock split effected by the Issuer on November 8, 2024.

SEC source: 0000897069-25-000861 · form4.xml · derivative · entry 1

Sims Wilson Donna · CIK 0001878855 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 29,300

Underlying: Common Stock · 23,859 shares

Expires not disclosed

F1 · derivative.exercise_price: Deferred common stock units issued to the reporting person pursuant to the FuelCell Energy, Inc. Directors Deferred Compensation Plan. In accordance with elections made by the reporting person under the Directors Deferred Compensation Plan, the shares of common stock underlying the common stock units are payable to the reporting person, on a one-for-one basis (i.e., one share of common stock for each common stock unit), upon separation from service as a director.

F1 · derivative.exercise_date: Deferred common stock units issued to the reporting person pursuant to the FuelCell Energy, Inc. Directors Deferred Compensation Plan. In accordance with elections made by the reporting person under the Directors Deferred Compensation Plan, the shares of common stock underlying the common stock units are payable to the reporting person, on a one-for-one basis (i.e., one share of common stock for each common stock unit), upon separation from service as a director.

F1 · derivative.expiration_date: Deferred common stock units issued to the reporting person pursuant to the FuelCell Energy, Inc. Directors Deferred Compensation Plan. In accordance with elections made by the reporting person under the Directors Deferred Compensation Plan, the shares of common stock underlying the common stock units are payable to the reporting person, on a one-for-one basis (i.e., one share of common stock for each common stock unit), upon separation from service as a director.

F2 · balance_after: Reflects the 1-for-30 reverse stock split effected by the Issuer on November 8, 2024.

SEC source: 0000897069-25-000859 · form4.xml · derivative · entry 1

Bingham Betsy B · CIK 0001896667 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 23,859

Underlying: Common Stock · 23,859 shares

Expires not disclosed

F1 · derivative.exercise_price: These restricted stock units (i) vest on the date of the regularly scheduled annual meeting of the stockholders of the Issuer to be held in 2026, and (ii) are to be settled in cash or in shares of the Company's common stock, at the discretion of the Compensation and Leadership Development Committee, as the administrator under the 2018 Omnibus Incentive Plan, as amended and restated.

F1 · derivative.exercise_date: These restricted stock units (i) vest on the date of the regularly scheduled annual meeting of the stockholders of the Issuer to be held in 2026, and (ii) are to be settled in cash or in shares of the Company's common stock, at the discretion of the Compensation and Leadership Development Committee, as the administrator under the 2018 Omnibus Incentive Plan, as amended and restated.

F1 · derivative.expiration_date: These restricted stock units (i) vest on the date of the regularly scheduled annual meeting of the stockholders of the Issuer to be held in 2026, and (ii) are to be settled in cash or in shares of the Company's common stock, at the discretion of the Compensation and Leadership Development Committee, as the administrator under the 2018 Omnibus Incentive Plan, as amended and restated.

SEC source: 0000897069-25-000857 · form4.xml · derivative · entry 1

Jordan Tyrone Michael · CIK 0001766331 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 27,983

Underlying: Common Stock · 23,859 shares

Expires not disclosed

F1 · derivative.exercise_price: Deferred common stock units issued to the reporting person pursuant to the FuelCell Energy, Inc. Directors Deferred Compensation Plan. In accordance with elections made by the reporting person under the Directors Deferred Compensation Plan, the shares of common stock underlying the common stock units are payable to the reporting person, on a one-for-one basis (i.e., one share of common stock for each common stock unit), upon separation from service as a director.

F1 · derivative.exercise_date: Deferred common stock units issued to the reporting person pursuant to the FuelCell Energy, Inc. Directors Deferred Compensation Plan. In accordance with elections made by the reporting person under the Directors Deferred Compensation Plan, the shares of common stock underlying the common stock units are payable to the reporting person, on a one-for-one basis (i.e., one share of common stock for each common stock unit), upon separation from service as a director.

F1 · derivative.expiration_date: Deferred common stock units issued to the reporting person pursuant to the FuelCell Energy, Inc. Directors Deferred Compensation Plan. In accordance with elections made by the reporting person under the Directors Deferred Compensation Plan, the shares of common stock underlying the common stock units are payable to the reporting person, on a one-for-one basis (i.e., one share of common stock for each common stock unit), upon separation from service as a director.

F2 · balance_after: Reflects the 1-for-30 reverse stock split effected by the Issuer on November 8, 2024.

SEC source: 0000897069-25-000853 · form4.xml · derivative · entry 2

Bingham Betsy B · CIK 0001896667 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,341

Underlying: Common Stock · 3,362 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Restricted stock units (RSUs") were converted into common stock on a one-for-one basis.

F4 · derivative.exercise_date: These RSUs (i) vested on April 15, 2025, and (ii) were settled in shares of the Company's common stock.

F4 · derivative.expiration_date: These RSUs (i) vested on April 15, 2025, and (ii) were settled in shares of the Company's common stock.

F2 · balance_after: Reflects the 1-for-30 reverse stock split effected by the Issuer on November 8, 2024.

F5 · balance_after: Includes 1,239 Deferred Common Units that are payable upon separation from service as a director in annual installments over a three year period, and 102 RSUs that vested in April 2022 but were deferred until separation from service as a director.

SEC source: 0000897069-25-000853 · form4.xml · nonDerivative · entry 1

Bingham Betsy B · CIK 0001896667 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,608

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Restricted stock units (RSUs") were converted into common stock on a one-for-one basis.

F2 · balance_after: Reflects the 1-for-30 reverse stock split effected by the Issuer on November 8, 2024.

F3 · balance_after: Reflects a correction to include one additional share that should have been included in the previous Form 4 filed on January 16, 2025 but was not due to an inadvertent rounding error in calculating the amount of securities beneficially owned following the reverse stock split.

SEC source: 0000897069-25-000111 · form4.xml · derivative · entry 1

England James Herbert · CIK 0001437823 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 21,281

Underlying: Common Stock · 3,001 shares

Expires not disclosed

F1 · derivative.exercise_price: Represents director retainer and committee fees paid in stock pursuant to the FuelCell Energy, Inc. Director Compensation Program. As such fees are being deferred pursuant to the FuelCell Energy, Inc. Directors Deferred Compensation Plan, deferred common stock units are being issued to the reporting person. In accordance with elections made by the reporting person under the Directors Deferred Compensation Plan, the shares of common stock underlying the common stock units are payable to the reporting person, on a one-for-one basis (i.e., one share of common stock for each common stock unit), upon separation from service as a director.

F1 · derivative.exercise_date: Represents director retainer and committee fees paid in stock pursuant to the FuelCell Energy, Inc. Director Compensation Program. As such fees are being deferred pursuant to the FuelCell Energy, Inc. Directors Deferred Compensation Plan, deferred common stock units are being issued to the reporting person. In accordance with elections made by the reporting person under the Directors Deferred Compensation Plan, the shares of common stock underlying the common stock units are payable to the reporting person, on a one-for-one basis (i.e., one share of common stock for each common stock unit), upon separation from service as a director.

F1 · derivative.expiration_date: Represents director retainer and committee fees paid in stock pursuant to the FuelCell Energy, Inc. Director Compensation Program. As such fees are being deferred pursuant to the FuelCell Energy, Inc. Directors Deferred Compensation Plan, deferred common stock units are being issued to the reporting person. In accordance with elections made by the reporting person under the Directors Deferred Compensation Plan, the shares of common stock underlying the common stock units are payable to the reporting person, on a one-for-one basis (i.e., one share of common stock for each common stock unit), upon separation from service as a director.

F2 · balance_after: Reflects the 1-for-30 reverse stock split effected by the Issuer on November 8, 2024.

SEC source: 0000897069-25-000109 · form4.xml · nonDerivative · entry 1

Bingham Betsy B · CIK 0001896667 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,245

F1 · shares: Represents director retainer and committee fees paid in stock pursuant to the FuelCell Energy, Inc. Director Compensation Program.

F2 · price: The price represents the closing price of the Issuer's common stock on January 15, 2025, which price was used to calculate the number of shares issued to the Reporting Person.

F3 · balance_after: Reflects the 1-for-30 reverse stock split effected by the Issuer on November 8, 2024.