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      <issuerAddress>
        <com:street1>3 GREAT PASTURE RD</com:street1>
        <com:city>DANBURY</com:city>
        <com:stateOrCountry>CT</com:stateOrCountry>
        <com:zipCode>06813</com:zipCode>
      </issuerAddress>
      <issuerContactPhone>2038256000</issuerContactPhone>
      <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Feasel Mark</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
      <relationshipsToIssuer>
        <relationshipToIssuer>Officer</relationshipToIssuer>
      </relationshipsToIssuer>
    </issuerInfo>
    <securitiesInformation>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <brokerOrMarketmakerDetails>
        <name>Fidelity Brokerage Services LLC</name>
        <address>
          <com:street1>900 Salem St</com:street1>
          <com:city>Smithfield</com:city>
          <com:stateOrCountry>RI</com:stateOrCountry>
          <com:zipCode>02917</com:zipCode>
        </address>
      </brokerOrMarketmakerDetails>
      <noOfUnitsSold>40000</noOfUnitsSold>
      <aggregateMarketValue>106428.00</aggregateMarketValue>
      <noOfUnitsOutstanding>406760629</noOfUnitsOutstanding>
      <approxSaleDate>06/13/2023</approxSaleDate>
      <securitiesExchangeName>NASDAQ</securitiesExchangeName>
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      <securitiesClassTitle>Common</securitiesClassTitle>
      <acquiredDate>12/12/2022</acquiredDate>
      <natureOfAcquisitionTransaction>Restricted Stock Vesting</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>4933</amountOfSecuritiesAcquired>
      <paymentDate>12/12/2022</paymentDate>
      <natureOfPayment>Compensation</natureOfPayment>
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    <securitiesToBeSold>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <acquiredDate>03/24/2023</acquiredDate>
      <natureOfAcquisitionTransaction>Restricted Stock Vesting</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>35067</amountOfSecuritiesAcquired>
      <paymentDate>03/24/2023</paymentDate>
      <natureOfPayment>Compensation</natureOfPayment>
    </securitiesToBeSold>
    <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
    <noticeSignature>
      <noticeDate>06/13/2023</noticeDate>
      <signature>/s/Wade Moss, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Mark Feasel</signature>
    </noticeSignature>
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144
0001921889
XXXXXXXX
LIVE
0000886128
FUELCELL ENERGY INC
001-14204
3 GREAT PASTURE RD
DANBURY
CT
06813
2038256000
Feasel Mark
Officer
Common
Fidelity Brokerage Services LLC
900 Salem St
Smithfield
RI
02917
40000
106428.00
406760629
06/13/2023
NASDAQ
Common
12/12/2022
Restricted Stock Vesting
Issuer
N
4933
12/12/2022
Compensation
Common
03/24/2023
Restricted Stock Vesting
Issuer
N
35067
03/24/2023
Compensation
Y
06/13/2023
/s/Wade Moss, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Mark Feasel