von Althann Natica

SEC source: 0000897069-26-000938 · form4.xml · derivative · entry 2

von Althann Natica · CIK 0001477502 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 23,859 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.

F3 · derivative.exercise_date: These RSUs (i) vested on April 21, 2026, and (ii) were settled in shares of the Company's common stock.

F3 · derivative.expiration_date: These RSUs (i) vested on April 21, 2026, and (ii) were settled in shares of the Company's common stock.

SEC source: 0000897069-26-000938 · form4.xml · nonDerivative · entry 1

von Althann Natica · CIK 0001477502 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 23,988

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.

SEC source: 0000897069-26-000871 · form4.xml · derivative · entry 1

von Althann Natica · CIK 0001477502 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 17,424

Underlying: Common Stock · 17,424 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 2027, 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 2027, 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 2027, 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: 0001193125-26-140210 · ownership.xml · derivative · entry 1

von Althann Natica · CIK 0001477502 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 107,614.287

Underlying: Common Stock · 1,140.214 shares

Expires not disclosed

F1 · derivative.exercise_price: No conversion or exercise price applies as, under the terms of the Directors Deferred Compensation Plan (DDCP), payout of the underlying securities will occur following a director's retirement.

F1 · derivative.exercise_date: No conversion or exercise price applies as, under the terms of the Directors Deferred Compensation Plan (DDCP), payout of the underlying securities will occur following a director's retirement.

F1 · derivative.expiration_date: No conversion or exercise price applies as, under the terms of the Directors Deferred Compensation Plan (DDCP), payout of the underlying securities will occur following a director's retirement.

F2 · balance_after: Total includes the reinvestment of dividends.

SEC source: 0001193125-26-004450 · ownership.xml · derivative · entry 1

von Althann Natica · CIK 0001477502 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 105,689.049

Underlying: Common Stock · 1,246.084 shares

Expires not disclosed

F1 · derivative.exercise_price: No conversion or exercise price applies as, under the terms of the Directors Deferred Compensation Plan (DDCP), payout of the underlying securities will occur following a director's retirement.

F1 · derivative.exercise_date: No conversion or exercise price applies as, under the terms of the Directors Deferred Compensation Plan (DDCP), payout of the underlying securities will occur following a director's retirement.

F1 · derivative.expiration_date: No conversion or exercise price applies as, under the terms of the Directors Deferred Compensation Plan (DDCP), payout of the underlying securities will occur following a director's retirement.

F2 · balance_after: Total includes the reinvestment of dividends.

SEC source: 0001193125-25-228461 · ownership.xml · derivative · entry 1

von Althann Natica · CIK 0001477502 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 103,638.593

Underlying: Common Stock · 1,161.52 shares

Expires not disclosed

F1 · derivative.exercise_price: No conversion or exercise price applies as, under the terms of the Directors Deferred Compensation Plan (DDCP), payout of the underlying securities will occur following a director's retirement.

F1 · derivative.exercise_date: No conversion or exercise price applies as, under the terms of the Directors Deferred Compensation Plan (DDCP), payout of the underlying securities will occur following a director's retirement.

F1 · derivative.expiration_date: No conversion or exercise price applies as, under the terms of the Directors Deferred Compensation Plan (DDCP), payout of the underlying securities will occur following a director's retirement.

F2 · balance_after: Total includes the reinvestment of dividends.

SEC source: 0000950170-25-092975 · ownership.xml · derivative · entry 1

von Althann Natica · CIK 0001477502 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 101,719.529

Underlying: Common Stock · 1,250.368 shares

Expires not disclosed

F1 · derivative.exercise_price: No conversion or exercise price applies as, under the terms of the Directors Deferred Compensation Plan (DDCP), payout of the underlying securities will occur following a director's retirement.

F1 · derivative.exercise_date: No conversion or exercise price applies as, under the terms of the Directors Deferred Compensation Plan (DDCP), payout of the underlying securities will occur following a director's retirement.

F1 · derivative.expiration_date: No conversion or exercise price applies as, under the terms of the Directors Deferred Compensation Plan (DDCP), payout of the underlying securities will occur following a director's retirement.

F2 · balance_after: Total includes the reinvestment of dividends.

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: 0000950170-25-050758 · ownership.xml · derivative · entry 1

von Althann Natica · CIK 0001477502 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 99,670.1

Underlying: Common Stock · 1,178.591 shares

Expires not disclosed

F1 · derivative.exercise_price: No conversion or exercise price applies as, under the terms of the Directors Deferred Compensation Plan (DDCP), payout of the underlying securities will occur following a director's retirement.

F1 · derivative.exercise_date: No conversion or exercise price applies as, under the terms of the Directors Deferred Compensation Plan (DDCP), payout of the underlying securities will occur following a director's retirement.

F1 · derivative.expiration_date: No conversion or exercise price applies as, under the terms of the Directors Deferred Compensation Plan (DDCP), payout of the underlying securities will occur following a director's retirement.

F2 · balance_after: Total includes the reinvestment of dividends.

SEC source: 0000897069-25-000107 · form4.xml · derivative · entry 1

von Althann Natica · CIK 0001477502 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,024

Underlying: Common Stock · 537 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: 0000950170-25-001511 · ownership.xml · derivative · entry 1

von Althann Natica · CIK 0001477502 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 97,752.806

Underlying: Common Stock · 1,320.696 shares

Expires not disclosed

F1 · derivative.exercise_price: No conversion or exercise price applies as, under the terms of the Directors Deferred Compensation Plan (DDCP), payout of the underlying securities will occur following a director's retirement.

F1 · derivative.exercise_date: No conversion or exercise price applies as, under the terms of the Directors Deferred Compensation Plan (DDCP), payout of the underlying securities will occur following a director's retirement.

F1 · derivative.expiration_date: No conversion or exercise price applies as, under the terms of the Directors Deferred Compensation Plan (DDCP), payout of the underlying securities will occur following a director's retirement.

F2 · balance_after: Total includes the reinvestment of dividends.

SEC source: 0000897069-24-001977 · form4.xml · derivative · entry 1

von Althann Natica · CIK 0001477502 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 284,726

Underlying: Common Stock · 15,943 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: 0000950170-24-111508 · ownership.xml · derivative · entry 1

von Althann Natica · CIK 0001477502 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 95,666.599

Underlying: Common Stock · 1,203.732 shares

Expires not disclosed

F1 · derivative.exercise_price: No conversion or exercise price applies as, under the terms of the Directors Deferred Compensation Plan (DDCP), payout of the underlying securities will occur following a director's retirement.

F1 · derivative.exercise_date: No conversion or exercise price applies as, under the terms of the Directors Deferred Compensation Plan (DDCP), payout of the underlying securities will occur following a director's retirement.

F1 · derivative.expiration_date: No conversion or exercise price applies as, under the terms of the Directors Deferred Compensation Plan (DDCP), payout of the underlying securities will occur following a director's retirement.

F2 · balance_after: Total includes the reinvestment of dividends.

SEC source: 0000897069-24-001505 · form4.xml · derivative · entry 1

von Althann Natica · CIK 0001477502 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 268,783

Underlying: Common Stock · 7,813 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: 0000950170-24-081337 · ownership.xml · derivative · entry 1

von Althann Natica · CIK 0001477502 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 93,736.501

Underlying: Common Stock · 1,461.988 shares

Expires not disclosed

F1 · derivative.exercise_price: No conversion or exercise price applies as, under the terms of the Directors Deferred Compensation Plan (DDCP), payout of the underlying securities will occur following a director's retirement.

F1 · derivative.exercise_date: No conversion or exercise price applies as, under the terms of the Directors Deferred Compensation Plan (DDCP), payout of the underlying securities will occur following a director's retirement.

F1 · derivative.expiration_date: No conversion or exercise price applies as, under the terms of the Directors Deferred Compensation Plan (DDCP), payout of the underlying securities will occur following a director's retirement.

F2 · balance_after: Total includes the reinvestment of dividends.

SEC source: 0000897069-24-000952 · form4.xml · derivative · entry 2

von Althann Natica · CIK 0001477502 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 260,970

Underlying: Common Stock · 5,148 shares

Expires not disclosed

F2 · 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.

F2 · 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.

F2 · 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: 0000897069-24-000952 · form4.xml · derivative · entry 1

von Althann Natica · CIK 0001477502 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 255,822

Underlying: Common Stock · 100,877 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.

SEC source: 0000950170-24-040267 · ownership.xml · derivative · entry 1

von Althann Natica · CIK 0001477502 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 91,414.164

Underlying: Common Stock · 1,454.545 shares

Expires not disclosed

F1 · derivative.exercise_price: No conversion or exercise price applies as, under the terms of the Directors Deferred Compensation Plan (DDCP), payout of the underlying securities will occur following a director's retirement.

F1 · derivative.exercise_date: No conversion or exercise price applies as, under the terms of the Directors Deferred Compensation Plan (DDCP), payout of the underlying securities will occur following a director's retirement.

F1 · derivative.expiration_date: No conversion or exercise price applies as, under the terms of the Directors Deferred Compensation Plan (DDCP), payout of the underlying securities will occur following a director's retirement.

F2 · balance_after: Total includes the reinvestment of dividends.

SEC source: 0000897069-24-000172 · form4.xml · derivative · entry 1

von Althann Natica · CIK 0001477502 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 154,945

Underlying: Common Stock · 4,526 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: 0001209191-24-000327 · doc4.xml · derivative · entry 1

von Althann Natica · CIK 0001477502 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 89,125.084

Underlying: Common Stock · 1,454.017 shares

Expires not disclosed

F1 · derivative.exercise_price: No conversion or exercise price applies, under the terms of the Directors Deferred Compensation Plan (DDCP), payout of the underlying securities will occur following a director's retirement.

F1 · derivative.exercise_date: No conversion or exercise price applies, under the terms of the Directors Deferred Compensation Plan (DDCP), payout of the underlying securities will occur following a director's retirement.

F1 · derivative.expiration_date: No conversion or exercise price applies, under the terms of the Directors Deferred Compensation Plan (DDCP), payout of the underlying securities will occur following a director's retirement.

F2 · balance_after: Total includes the reinvestment of dividends.

SEC source: 0000897069-23-001480 · form4.xml · derivative · entry 1

von Althann Natica · CIK 0001477502 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 150,419

Underlying: Common Stock · 4,070 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: 0001209191-23-051415 · doc4.xml · derivative · entry 1

von Althann Natica · CIK 0001477502 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 86,912.831

Underlying: Common Stock · 1,718.404 shares

Expires not disclosed

F1 · derivative.exercise_price: No conversion or exercise price applies, under the terms of the Directors Deferred Compensation Plan (DDCP), payout of the underlying securities will occur following a director's retirement.

F1 · derivative.exercise_date: No conversion or exercise price applies, under the terms of the Directors Deferred Compensation Plan (DDCP), payout of the underlying securities will occur following a director's retirement.

F1 · derivative.expiration_date: No conversion or exercise price applies, under the terms of the Directors Deferred Compensation Plan (DDCP), payout of the underlying securities will occur following a director's retirement.

F2 · balance_after: Total includes the reinvestment of dividends.

SEC source: 0000897069-23-000932 · form4.xml · derivative · entry 1

von Althann Natica · CIK 0001477502 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 146,349

Underlying: Common Stock · 2,109 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: 0001209191-23-041068 · doc4.xml · derivative · entry 1

von Althann Natica · CIK 0001477502 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 84,297.25

Underlying: Common Stock · 1,452.943 shares

Expires not disclosed

F1 · derivative.exercise_price: No conversion or exercise price applies, under the terms of the Directors Deferred Compensation Plan (DDCP), payout of the underlying securities will occur following a director's retirement.

F1 · derivative.exercise_date: No conversion or exercise price applies, under the terms of the Directors Deferred Compensation Plan (DDCP), payout of the underlying securities will occur following a director's retirement.

F1 · derivative.expiration_date: No conversion or exercise price applies, under the terms of the Directors Deferred Compensation Plan (DDCP), payout of the underlying securities will occur following a director's retirement.

F2 · balance_after: Total includes the reinvestment of dividends.

SEC source: 0000897069-23-000511 · form4.xml · derivative · entry 2

von Althann Natica · CIK 0001477502 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 144,240

Underlying: Common Stock · 2,235 shares

Expires not disclosed

F2 · 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.

F2 · 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.

F2 · 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: 0000897069-23-000511 · form4.xml · derivative · entry 1

von Althann Natica · CIK 0001477502 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 142,005

Underlying: Common Stock · 48,936 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.

SEC source: 0001209191-23-023284 · doc4.xml · derivative · entry 1

von Althann Natica · CIK 0001477502 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 82,105.45

Underlying: Common Stock · 1,405.004 shares

Expires not disclosed

F1 · derivative.exercise_price: No conversion or exercise price applies, under the terms of the Directors Deferred Compensation Plan (DDCP), payout of the underlying securities will occur following a director's retirement.

F1 · derivative.exercise_date: No conversion or exercise price applies, under the terms of the Directors Deferred Compensation Plan (DDCP), payout of the underlying securities will occur following a director's retirement.

F1 · derivative.expiration_date: No conversion or exercise price applies, under the terms of the Directors Deferred Compensation Plan (DDCP), payout of the underlying securities will occur following a director's retirement.

F2 · balance_after: Total includes the reinvestment of dividends.

SEC source: 0001567619-23-000995 · doc1.xml · derivative · entry 1

von Althann Natica · CIK 0001477502 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 93,069

Underlying: Common Stock · 1,621 shares

Expires not disclosed

F1 · derivative.exercise_price: Represents director retainer and committee fees paid in stock pursuant to the FuelCell Energy, Inc. 2022 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. 2022 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. 2022 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: 0001209191-23-000934 · doc4.xml · derivative · entry 1

von Althann Natica · CIK 0001477502 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 80,004.253

Underlying: Common Stock · 1,327.055 shares

Expires not disclosed

F1 · derivative.exercise_price: No conversion or exercise price applies, under the terms of the Directors Deferred Compensation Plan (DDCP), payout of the underlying securities will occur following a director's retirement.

F1 · derivative.exercise_date: No conversion or exercise price applies, under the terms of the Directors Deferred Compensation Plan (DDCP), payout of the underlying securities will occur following a director's retirement.

F1 · derivative.expiration_date: No conversion or exercise price applies, under the terms of the Directors Deferred Compensation Plan (DDCP), payout of the underlying securities will occur following a director's retirement.

F2 · balance_after: Total includes the reinvestment of dividends.

SEC source: 0001567619-22-018571 · doc1.xml · derivative · entry 1

von Althann Natica · CIK 0001477502 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 91,448

Underlying: Common Stock · 1,811 shares

Expires not disclosed

F1 · derivative.exercise_price: Represents director retainer and committee fees paid in stock pursuant to the FuelCell Energy, Inc. 2022 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. 2022 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. 2022 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: 0001209191-22-052484 · doc4.xml · derivative · entry 1

von Althann Natica · CIK 0001477502 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 78,075.587

Underlying: Common Stock · 1,486.953 shares

Expires not disclosed

F1 · derivative.exercise_price: No conversion or exercise price applies, under the terms of the Directors Deferred Compensation Plan (DDCP), payout of the underlying securities will occur following a director's retirement.

F1 · derivative.exercise_date: No conversion or exercise price applies, under the terms of the Directors Deferred Compensation Plan (DDCP), payout of the underlying securities will occur following a director's retirement.

F1 · derivative.expiration_date: No conversion or exercise price applies, under the terms of the Directors Deferred Compensation Plan (DDCP), payout of the underlying securities will occur following a director's retirement.

F2 · balance_after: Total includes the reinvestment of dividends.

SEC source: 0001567619-22-014192 · doc1.xml · derivative · entry 1

von Althann Natica · CIK 0001477502 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 89,637

Underlying: Common Stock · 1,505 shares

Expires not disclosed

F1 · derivative.exercise_price: Represents director retainer and committee fees paid in stock pursuant to the FuelCell Energy, Inc. 2022 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. 2022 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. 2022 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: 0001209191-22-040605 · doc4.xml · derivative · entry 1

von Althann Natica · CIK 0001477502 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 75,933.034

Underlying: Common Stock · 1,395.893 shares

Expires not disclosed

F1 · derivative.exercise_price: No conversion or exercise price applies, under the terms of the Directors Deferred Compensation Plan (DDCP), payout of the underlying securities will occur following a director's retirement.

F1 · derivative.exercise_date: No conversion or exercise price applies, under the terms of the Directors Deferred Compensation Plan (DDCP), payout of the underlying securities will occur following a director's retirement.

F1 · derivative.expiration_date: No conversion or exercise price applies, under the terms of the Directors Deferred Compensation Plan (DDCP), payout of the underlying securities will occur following a director's retirement.

F2 · balance_after: Total includes the reinvestment of dividends.

SEC source: 0001567619-22-008670 · doc1.xml · derivative · entry 1

von Althann Natica · CIK 0001477502 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 88,132

Underlying: Common Stock · 999 shares

Expires not disclosed

F1 · derivative.exercise_price: Represents director retainer and committee fees paid in stock pursuant to the FuelCell Energy, Inc. 2021 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. 2021 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. 2021 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: 0001567619-22-008377 · doc1.xml · derivative · entry 3

von Althann Natica · CIK 0001477502 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 87,133

Underlying: Common Stock · 13,441 shares

Expires not disclosed

F4 · 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.

F4 · 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.

F4 · 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.

F5 · balance_after: Balance reflects the 4/7/2022 vesting of 3,946 restricted stock units that were deferred by the reporting person.

SEC source: 0001567619-22-008377 · doc1.xml · derivative · entry 2

von Althann Natica · CIK 0001477502 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 1,973 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: Each?restricted?stock?unit?represented?a?contingent?right?to?receive?one?share?of?common?stock?or,?at?the?election?of?the?Compensation?Committee,?the?cash?value?thereof.

F3 · derivative.exercise_date: These restricted stock units (i) vested on the date of the regularly scheduled annual meeting of the stockholders of the Company held in 2022 (i.e., April 7, 2022) and (ii) were settled in shares of FuelCell Energy common stock.

F3 · derivative.expiration_date: These restricted stock units (i) vested on the date of the regularly scheduled annual meeting of the stockholders of the Company held in 2022 (i.e., April 7, 2022) and (ii) were settled in shares of FuelCell Energy common stock.

SEC source: 0001567619-22-008377 · doc1.xml · nonDerivative · entry 1

von Althann Natica · CIK 0001477502 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,890

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 · balance_after: The balance excludes 14,367 shares inadvertently included in prior Form 4s. These shares were reported as vested in a Form 4 filed on 4/13/20, as amended by a Form 4 filed on 4/24/20. Such shares were deferred under the Directors Deferred Compensation Plan and will be received by the reporting person upon separation from service as a director.

SEC source: 0001209191-22-022358 · doc4.xml · derivative · entry 1

von Althann Natica · CIK 0001477502 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 73,937.861

Underlying: Common Stock · 1,335.286 shares

Expires not disclosed

F1 · derivative.exercise_price: No conversion or exercise price applies, under the terms of the Directors Deferred Compensation Plan (DDCP), payout of the underlying securities will occur following a director's retirement.

F1 · derivative.exercise_date: No conversion or exercise price applies, under the terms of the Directors Deferred Compensation Plan (DDCP), payout of the underlying securities will occur following a director's retirement.

F1 · derivative.expiration_date: No conversion or exercise price applies, under the terms of the Directors Deferred Compensation Plan (DDCP), payout of the underlying securities will occur following a director's retirement.

F2 · balance_after: Total includes the reinvestment of dividends.

SEC source: 0001567619-22-001909 · doc1.xml · derivative · entry 1

von Althann Natica · CIK 0001477502 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 69,746

Underlying: Common Stock · 1,294 shares

Expires not disclosed

F1 · derivative.exercise_price: Represents director retainer and committee fees paid in stock pursuant to the FuelCell Energy, Inc. 2021 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. 2021 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. 2021 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: 0001209191-22-000812 · doc4.xml · derivative · entry 1

von Althann Natica · CIK 0001477502 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 72,105.637

Underlying: Common Stock · 1,285.667 shares

Expires not disclosed

F1 · derivative.exercise_price: No conversion or exercise price applies, under the terms of the Directors Deferred Compensation Plan (DDCP), payout of the underlying securities will occur following a director's retirement.

F2 · derivative.exercise_date: Payout of the underlying securities occurs as noted above in Note 1.

F2 · derivative.expiration_date: Payout of the underlying securities occurs as noted above in Note 1.

F3 · balance_after: Total includes the reinvestment of dividends.

SEC source: 0001567619-21-018416 · doc1.xml · derivative · entry 1

von Althann Natica · CIK 0001477502 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 68,452

Underlying: Common Stock · 866 shares

Expires not disclosed

F1 · derivative.exercise_price: Represents director retainer and committee fees paid in stock pursuant to the FuelCell Energy, Inc. 2021 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. 2021 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. 2021 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: 0001209191-21-059405 · doc4.xml · derivative · entry 1

von Althann Natica · CIK 0001477502 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 69,858.089

Underlying: Common Stock · 1,341.202 shares

Expires not disclosed

F1 · derivative.exercise_price: No conversion or exercise price applies, under the terms of the Directors Deferred Compensation Plan (DDCP), payout of the underlying securities will occur following a director's retirement.

F2 · derivative.exercise_date: Payout of the underlying securities occurs as noted above in Note 1.

F2 · derivative.expiration_date: Payout of the underlying securities occurs as noted above in Note 1.

F3 · balance_after: Total includes the reinvestment of dividends.

SEC source: 0001567619-21-013581 · doc1.xml · derivative · entry 1

von Althann Natica · CIK 0001477502 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 67,586

Underlying: Common Stock · 885 shares

Expires not disclosed

F1 · derivative.exercise_price: Represents director retainer and committee fees paid in stock pursuant to the FuelCell Energy, Inc. 2021 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. 2021 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. 2021 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: 0001209191-21-045458 · doc4.xml · derivative · entry 1

von Althann Natica · CIK 0001477502 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 67,514.79

Underlying: Common Stock · 1,326.964 shares

Expires not disclosed

F1 · derivative.exercise_price: No conversion or exercise price applies, under the terms of the Directors Deferred Compensation Plan (DDCP), payout of the underlying securities will occur following a director's retirement.

F2 · derivative.exercise_date: Payout of the underlying securities occurs as noted above in Note 1.

F2 · derivative.expiration_date: Payout of the underlying securities occurs as noted above in Note 1.

F3 · balance_after: Total includes the reinvestment of dividends.

SEC source: 0001567619-21-008309 · doc1.xml · derivative · entry 1

von Althann Natica · CIK 0001477502 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 66,701

Underlying: Common Stock · 567 shares

Expires not disclosed

F1 · derivative.exercise_price: Represents director retainer and committee fees paid in stock pursuant to the FuelCell Energy, Inc. 2021 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. 2021 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. 2021 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: Balance includes the April 8, 2021 vesting of restricted stock units previously awarded and reported, which the reporting person has elected to defer, as well as all other previously vested restricted stock units and common stock that the reporting person has elected to defer.

SEC source: 0001567619-21-007927 · doc1.xml · derivative · entry 1

von Althann Natica · CIK 0001477502 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,919

Underlying: Common Stock · 5,919 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of common stock or, at the election of the Compensation Committee, the cash value thereof.

F2 · derivative.exercise_date: These RSUs (i) vest on the date of the regularly scheduled annual meeting of the stockholders of the Company to be held in 2022, and (ii) are to be settled in cash or in shares of the Company's common stock, at the discretion of the Compensation Committee, as the administrator under the Plan. The reporting person has elected to defer receipt of two-thirds of the restricted stock units until the reporting person's separation from service as a director, subject to vesting requirements.

F2 · derivative.expiration_date: These RSUs (i) vest on the date of the regularly scheduled annual meeting of the stockholders of the Company to be held in 2022, and (ii) are to be settled in cash or in shares of the Company's common stock, at the discretion of the Compensation Committee, as the administrator under the Plan. The reporting person has elected to defer receipt of two-thirds of the restricted stock units until the reporting person's separation from service as a director, subject to vesting requirements.

SEC source: 0001209191-21-025328 · doc4.xml · derivative · entry 1

von Althann Natica · CIK 0001477502 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 65,229.921

Underlying: Common Stock · 1,303.441 shares

Expires not disclosed

F1 · derivative.exercise_price: No conversion or exercise price applies, under the terms of the Directors Deferred Compensation Plan (DDCP), payout of the underlying securities will occur following a director's retirement.

F2 · derivative.exercise_date: Payout of the underlying securities occurs as noted above in Note 1.

F2 · derivative.expiration_date: Payout of the underlying securities occurs as noted above in Note 1.

F3 · balance_after: Total includes the reinvestment of dividends.

SEC source: 0001209191-21-001017 · doc4.xml · derivative · entry 1

von Althann Natica · CIK 0001477502 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 63,017.469

Underlying: Common Stock · 1,359.681 shares

Expires not disclosed

F1 · derivative.exercise_price: No conversion or exercise price applies, under the terms of the Directors Deferred Compensation Plan (DDCP), payout of the underlying securities will occur following a director's retirement.

F2 · derivative.exercise_date: Payout of the underlying securities occurs as noted above in Note 1.

F2 · derivative.expiration_date: Payout of the underlying securities occurs as noted above in Note 1.

F3 · balance_after: Total includes the reinvestment of dividends.

SEC source: 0001209191-20-052847 · doc4.xml · derivative · entry 1

von Althann Natica · CIK 0001477502 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 60,743.767

Underlying: Common Stock · 1,361.162 shares

Expires not disclosed

F1 · derivative.exercise_price: No conversion or exercise price applies, under the terms of the Directors Deferred Compensation Plan (DDCP), payout of the underlying securities will occur following a director's retirement.

F2 · derivative.exercise_date: Payout of the underlying securities occurs as noted above in Note 1.

F2 · derivative.expiration_date: Payout of the underlying securities occurs as noted above in Note 1.

F3 · balance_after: Total includes the reinvestment of dividends.

SEC source: 0001567619-20-017998 · doc1.xml · derivative · entry 1

von Althann Natica · CIK 0001477502 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 8,993

Underlying: Common Stock · 8,993 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of common stock or, at the election of the Compensation Committee, the cash value thereof.

F2 · derivative.exercise_date: These RSUs (i) vest on the date of the regularly scheduled annual meeting of the stockholders of the Company to be held in 2021, and (ii) are to be settled in cash or in shares of the Company's common stock, at the discretion of the Compensation Committee, as the administrator under the Plan. The reporting person has elected to defer receipt of the restricted stock units until the reporting person's separation from service as a director, subject to vesting requirements.

F2 · derivative.expiration_date: These RSUs (i) vest on the date of the regularly scheduled annual meeting of the stockholders of the Company to be held in 2021, and (ii) are to be settled in cash or in shares of the Company's common stock, at the discretion of the Compensation Committee, as the administrator under the Plan. The reporting person has elected to defer receipt of the restricted stock units until the reporting person's separation from service as a director, subject to vesting requirements.