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      <filer>
        <filerCredentials>
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          <ccc>XXXXXXXX</ccc>
        </filerCredentials>
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      <liveTestFlag>LIVE</liveTestFlag>


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    <issuerInfo>
      <issuerCik>0001069258</issuerCik>
      <issuerName>KRATOS DEFENSE &amp; SECURITY SOLUTIONS, INC.</issuerName>
      <secFileNumber>001-34460</secFileNumber>
      <issuerAddress>
        <com:street1>10680 TREENA STREET</com:street1>
        <com:street2>SUITE 600</com:street2>
        <com:city>SAN DIEGO</com:city>
        <com:stateOrCountry>CA</com:stateOrCountry>
        <com:zipCode>92131</com:zipCode>
      </issuerAddress>
      <issuerContactPhone>512-238-9840</issuerContactPhone>
      <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Fendley Steven S.</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
      <relationshipsToIssuer>
        <relationshipToIssuer>Officer</relationshipToIssuer>
      </relationshipsToIssuer>
    </issuerInfo>
    <securitiesInformation>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <brokerOrMarketmakerDetails>
        <name>Fidelity Brokerage Services LLC</name>
        <address>
          <com:street1>245 Summer Street</com:street1>
          <com:city>Boston</com:city>
          <com:stateOrCountry>MA</com:stateOrCountry>
          <com:zipCode>02110</com:zipCode>
        </address>
      </brokerOrMarketmakerDetails>
      <noOfUnitsSold>25000</noOfUnitsSold>
      <aggregateMarketValue>352750.00</aggregateMarketValue>
      <noOfUnitsOutstanding>127603137</noOfUnitsOutstanding>
      <approxSaleDate>06/07/2023</approxSaleDate>
      <securitiesExchangeName>NASDAQ</securitiesExchangeName>
    </securitiesInformation>
    <securitiesToBeSold>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <acquiredDate>04/05/2022</acquiredDate>
      <natureOfAcquisitionTransaction>Share Grant</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>8088</amountOfSecuritiesAcquired>
      <paymentDate>04/05/2022</paymentDate>
      <natureOfPayment>N/A</natureOfPayment>
    </securitiesToBeSold>
    <securitiesToBeSold>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <acquiredDate>02/28/2022</acquiredDate>
      <natureOfAcquisitionTransaction>Share Grant</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>16710</amountOfSecuritiesAcquired>
      <paymentDate>02/28/2022</paymentDate>
      <natureOfPayment>N/A</natureOfPayment>
    </securitiesToBeSold>
    <securitiesToBeSold>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <acquiredDate>01/03/2022</acquiredDate>
      <natureOfAcquisitionTransaction>Share Grant</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>202</amountOfSecuritiesAcquired>
      <paymentDate>01/03/2022</paymentDate>
      <natureOfPayment>N/A</natureOfPayment>
    </securitiesToBeSold>
    <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
    <noticeSignature>
      <noticeDate>06/07/2023</noticeDate>
      <signature>/s/ Myra King, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Steven S. Fendley</signature>
    </noticeSignature>
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144
0001695434
XXXXXXXX
LIVE
0001069258
KRATOS DEFENSE & SECURITY SOLUTIONS, INC.
001-34460
10680 TREENA STREET
SUITE 600
SAN DIEGO
CA
92131
512-238-9840
Fendley Steven S.
Officer
Common Stock
Fidelity Brokerage Services LLC
245 Summer Street
Boston
MA
02110
25000
352750.00
127603137
06/07/2023
NASDAQ
Common Stock
04/05/2022
Share Grant
Issuer
N
8088
04/05/2022
N/A
Common Stock
02/28/2022
Share Grant
Issuer
N
16710
02/28/2022
N/A
Common Stock
01/03/2022
Share Grant
Issuer
N
202
01/03/2022
N/A
Y
06/07/2023
/s/ Myra King, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Steven S. Fendley