<SEC-DOCUMENT>0001509411-23-000004.txt : 20231103
<SEC-HEADER>0001509411-23-000004.hdr.sgml : 20231103
<ACCEPTANCE-DATETIME>20231103194401
ACCESSION NUMBER:		0001509411-23-000004
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20231101
FILED AS OF DATE:		20231103
DATE AS OF CHANGE:		20231103

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Judd Jane Elizabeth
		CENTRAL INDEX KEY:			0001509411

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-34460
		FILM NUMBER:		231377830

	MAIL ADDRESS:	
		STREET 1:		10680 TREENA STREET, SUITE 600
		CITY:			SAN DIEGO
		STATE:			CA
		ZIP:			92131

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			KRATOS DEFENSE & SECURITY SOLUTIONS, INC.
		CENTRAL INDEX KEY:			0001069258
		STANDARD INDUSTRIAL CLASSIFICATION:	GUIDED MISSILES & SPACE VEHICLES & PARTS [3760]
		IRS NUMBER:				133818604
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		10680 TREENA STREET
		STREET 2:		SUITE 600
		CITY:			SAN DIEGO
		STATE:			CA
		ZIP:			92131
		BUSINESS PHONE:		858-812-7300

	MAIL ADDRESS:	
		STREET 1:		10680 TREENA STREET
		STREET 2:		SUITE 600
		CITY:			SAN DIEGO
		STATE:			CA
		ZIP:			92131

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	WIRELESS FACILITIES INC
		DATE OF NAME CHANGE:	19990817
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
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            <ownershipNature>
                <directOrIndirectOwnership>
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                </directOrIndirectOwnership>
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            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F1"/>
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            <transactionDate>
                <value>2023-11-01</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>M</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
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            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
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                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
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                <transactionAcquiredDisposedCode>
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                </transactionAcquiredDisposedCode>
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            <expirationDate>
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            <ownershipNature>
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                </directOrIndirectOwnership>
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        <derivativeTransaction>
            <securityTitle>
                <value>Restricted Stock Units</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F1"/>
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                <transactionFormType>4</transactionFormType>
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            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
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                </transactionShares>
                <transactionPricePerShare>
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                </transactionAcquiredDisposedCode>
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            <exerciseDate>
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            </exerciseDate>
            <expirationDate>
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            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
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                </transactionShares>
                <transactionPricePerShare>
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                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
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                </transactionAcquiredDisposedCode>
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            <exerciseDate>
                <footnoteId id="F10"/>
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            <expirationDate>
                <footnoteId id="F10"/>
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                </underlyingSecurityTitle>
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            </underlyingSecurity>
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                </directOrIndirectOwnership>
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        </derivativeTransaction>
        <derivativeTransaction>
            <securityTitle>
                <value>Restricted Stock Units</value>
            </securityTitle>
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                <transactionFormType>4</transactionFormType>
                <transactionCode>M</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>10000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F11"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F11"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>10000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
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                <sharesOwnedFollowingTransaction>
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                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
        <derivativeTransaction>
            <securityTitle>
                <value>Restricted Stock Units</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F1"/>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2023-11-01</value>
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                <transactionFormType>4</transactionFormType>
                <transactionCode>M</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>10000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
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            <exerciseDate>
                <footnoteId id="F12"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F12"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>10000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
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                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Each Restricted Stock Unit (RSU) represents a contingent right to receive one share of Issuer's common stock.</footnote>
        <footnote id="F2">RSUs were granted on January 3, 2011 that vested and then released November 1, 2023 after the issuance was deferred until retirement from the board.</footnote>
        <footnote id="F3">RSUs were granted on June 6, 2011 that vested and then released November 1, 2023 after the issuance was deferred until retirement from the board.</footnote>
        <footnote id="F4">RSUs were granted on January 3, 2012 that vested and then released November 1, 2023 after the issuance was deferred until retirement from the board.</footnote>
        <footnote id="F5">RSUs were granted on March 20, 2014 that vested and then released November 1, 2023 after the issuance was deferred until retirement from the board.</footnote>
        <footnote id="F6">RSUs were granted on January 1, 2015 that vested and then released November 1, 2023 after the issuance was deferred until retirement from the board.</footnote>
        <footnote id="F7">RSUs were granted on January 4, 2016 that vested and then released November 1, 2023 after the issuance was deferred until retirement from the board.</footnote>
        <footnote id="F8">RSUs were granted on January 4, 2017 that vested and then released November 1, 2023 after the issuance was deferred until retirement from the board.</footnote>
        <footnote id="F9">RSUs were granted on June 19, 2018 that vested and then released November 1, 2023 after the issuance was deferred until retirement from the board.</footnote>
        <footnote id="F10">RSUs were granted on May 10, 2019 that vested and then released November 1, 2023 after the issuance was deferred until retirement from the board.</footnote>
        <footnote id="F11">RSUs were granted on June 4, 2020 that vested and then released November 1, 2023 after the issuance was deferred until retirement from the board.</footnote>
        <footnote id="F12">RSUs were granted on May 24, 2023 that vested and were settled upon retirement from the board.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>Jane E. Judd, by Eva Yee, Attorney-In-Fact</signatureName>
        <signatureDate>2023-11-03</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
