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                    <ccc>XXXXXXXX</ccc>
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            <liveTestFlag>LIVE</liveTestFlag>



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            <issuerCik>0001364885</issuerCik>
            <issuerName>SPIRIT AEROSYSTEMS HOLDINGS INC.</issuerName>
            <secFileNumber>001-33160</secFileNumber>
            <issuerAddress>
                <ns2:street1>3801 South Oliver</ns2:street1>
                <ns2:city>Wichita</ns2:city>
                <ns2:stateOrCountry>KS</ns2:stateOrCountry>
                <ns2:zipCode>67210</ns2:zipCode>
            </issuerAddress>
            <issuerContactPhone>(316) 526-9000</issuerContactPhone>
            <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>BILL BROWN</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
            <relationshipsToIssuer>
                <relationshipToIssuer>Officer</relationshipToIssuer>
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        <securitiesInformation>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <brokerOrMarketmakerDetails>
                <name>Morgan Stanley Smith Barney LLC Executive Financial Services</name>
                <address>
                    <ns2:street1>1 New York Plaza</ns2:street1>
                    <ns2:street2>8th Floor</ns2:street2>
                    <ns2:city>New York</ns2:city>
                    <ns2:stateOrCountry>NY</ns2:stateOrCountry>
                    <ns2:zipCode>10004</ns2:zipCode>
                </address>
            </brokerOrMarketmakerDetails>
            <noOfUnitsSold>48781</noOfUnitsSold>
            <aggregateMarketValue>1666295.54</aggregateMarketValue>
            <noOfUnitsOutstanding>116620424</noOfUnitsOutstanding>
            <approxSaleDate>08/14/2024</approxSaleDate>
            <securitiesExchangeName>NYSE</securitiesExchangeName>
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            <acquiredDate>02/26/2023</acquiredDate>
            <natureOfAcquisitionTransaction>Restricted stock vesting under a registered plan</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>2636</amountOfSecuritiesAcquired>
            <paymentDate>02/26/2023</paymentDate>
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        <securitiesToBeSold>
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            <acquiredDate>09/03/2021</acquiredDate>
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            <amountOfSecuritiesAcquired>29599</amountOfSecuritiesAcquired>
            <paymentDate>09/03/2021</paymentDate>
            <natureOfPayment>Services Rendered</natureOfPayment>
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        <securitiesToBeSold>
            <securitiesClassTitle>common</securitiesClassTitle>
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            <paymentDate>10/23/2021</paymentDate>
            <natureOfPayment>Services Rendered</natureOfPayment>
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        <securitiesToBeSold>
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            <acquiredDate>02/06/2022</acquiredDate>
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            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>965</amountOfSecuritiesAcquired>
            <paymentDate>02/06/2022</paymentDate>
            <natureOfPayment>Services Rendered</natureOfPayment>
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        <securitiesToBeSold>
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            <amountOfSecuritiesAcquired>2076</amountOfSecuritiesAcquired>
            <paymentDate>02/26/2022</paymentDate>
            <natureOfPayment>Services Rendered</natureOfPayment>
        </securitiesToBeSold>
        <securitiesToBeSold>
            <securitiesClassTitle>common</securitiesClassTitle>
            <acquiredDate>03/04/2022</acquiredDate>
            <natureOfAcquisitionTransaction>Restricted stock vesting under a registered plan</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>1746</amountOfSecuritiesAcquired>
            <paymentDate>03/04/2022</paymentDate>
            <natureOfPayment>Services Rendered</natureOfPayment>
        </securitiesToBeSold>
        <securitiesToBeSold>
            <securitiesClassTitle>common</securitiesClassTitle>
            <acquiredDate>02/07/2024</acquiredDate>
            <natureOfAcquisitionTransaction>Restricted stock vesting under a registered plan</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>1768</amountOfSecuritiesAcquired>
            <paymentDate>02/07/2024</paymentDate>
            <natureOfPayment>Services Rendered</natureOfPayment>
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        <securitiesToBeSold>
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            <acquiredDate>02/10/2024</acquiredDate>
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            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>2811</amountOfSecuritiesAcquired>
            <paymentDate>02/10/2024</paymentDate>
            <natureOfPayment>Services Rendered</natureOfPayment>
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        <securitiesToBeSold>
            <securitiesClassTitle>common</securitiesClassTitle>
            <acquiredDate>02/26/2024</acquiredDate>
            <natureOfAcquisitionTransaction>Restricted stock vesting under a registered plan</natureOfAcquisitionTransaction>
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            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>2646</amountOfSecuritiesAcquired>
            <paymentDate>02/26/2024</paymentDate>
            <natureOfPayment>Services Rendered</natureOfPayment>
        </securitiesToBeSold>
        <securitiesToBeSold>
            <securitiesClassTitle>common</securitiesClassTitle>
            <acquiredDate>03/04/2023</acquiredDate>
            <natureOfAcquisitionTransaction>Restricted stock vesting under a registered plan</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>2217</amountOfSecuritiesAcquired>
            <paymentDate>03/04/2023</paymentDate>
            <natureOfPayment>Services Rendered</natureOfPayment>
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        <securitiesToBeSold>
            <securitiesClassTitle>common</securitiesClassTitle>
            <acquiredDate>02/07/2023</acquiredDate>
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            <paymentDate>02/07/2023</paymentDate>
            <natureOfPayment>Services Rendered</natureOfPayment>
        </securitiesToBeSold>
        <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
        <noticeSignature>
            <noticeDate>08/14/2024</noticeDate>
            <planAdoptionDates/>
            <signature>/s/ WIlliam E Brown</signature>
        </noticeSignature>
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144
0001256559
XXXXXXXX
LIVE
0001364885
SPIRIT AEROSYSTEMS HOLDINGS INC.
001-33160
3801 South Oliver
Wichita
KS
67210
(316) 526-9000
BILL BROWN
Officer
Common
Morgan Stanley Smith Barney LLC Executive Financial Services
1 New York Plaza
8th Floor
New York
NY
10004
48781
1666295.54
116620424
08/14/2024
NYSE
common
02/26/2023
Restricted stock vesting under a registered plan
Issuer
N
2636
02/26/2023
Services Rendered
common
09/03/2021
Restricted stock vesting under a registered plan
Issuer
N
29599
09/03/2021
Services Rendered
common
10/23/2021
Restricted stock vesting under a registered plan
Issuer
N
438
10/23/2021
Services Rendered
common
02/06/2022
Restricted stock vesting under a registered plan
Issuer
N
965
02/06/2022
Services Rendered
common
02/26/2022
Restricted stock vesting under a registered plan
Issuer
N
2076
02/26/2022
Services Rendered
common
03/04/2022
Restricted stock vesting under a registered plan
Issuer
N
1746
03/04/2022
Services Rendered
common
02/07/2024
Restricted stock vesting under a registered plan
Issuer
N
1768
02/07/2024
Services Rendered
common
02/10/2024
Restricted stock vesting under a registered plan
Issuer
N
2811
02/10/2024
Services Rendered
common
02/26/2024
Restricted stock vesting under a registered plan
Issuer
N
2646
02/26/2024
Services Rendered
common
03/04/2023
Restricted stock vesting under a registered plan
Issuer
N
2217
03/04/2023
Services Rendered
common
02/07/2023
Restricted stock vesting under a registered plan
Issuer
N
1879
02/07/2023
Services Rendered
Y
08/14/2024
/s/ WIlliam E Brown