<SEC-DOCUMENT>0001675014-25-000001.txt : 20250107
<SEC-HEADER>0001675014-25-000001.hdr.sgml : 20250107
<ACCEPTANCE-DATETIME>20250107193506
ACCESSION NUMBER:		0001675014-25-000001
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20250103
FILED AS OF DATE:		20250107
DATE AS OF CHANGE:		20250107

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Cervantes de Burgreen Maria
		CENTRAL INDEX KEY:			0001675014
		ORGANIZATION NAME:           	

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-34460
		FILM NUMBER:		25516229

	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]
		ORGANIZATION NAME:           	04 Manufacturing
		IRS NUMBER:				133818604
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1229

	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>
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            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>2500</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F6"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F6"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>2500</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>2500</value>
                </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>2025-01-04</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>M</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>2500</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F7"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F7"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>2500</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>10000</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 vest ratably on each of the first five anniversaries of the date of grant, unless earlier vested or terminated pursuant to the terms of the RSU agreement.</footnote>
        <footnote id="F3">RSUs were granted and previously reported on a Form 4 filed January 6, 2020, where 12,500 RSUs vest ratably on each of the first five anniversaries of the January 3, 2020 date of grant.</footnote>
        <footnote id="F4">RSUs were granted and previously reported on a Form 4 filed January 5, 2022, where 12,500 RSUs vest ratably on each of the first five anniversaries of the January 3, 2022 date of grant.</footnote>
        <footnote id="F5">RSUs were granted and previously reported on a Form 4 filed January 5, 2023, where 12,500 RSUs vest ratably on each of the first five anniversaries of the January 3, 2023 date of grant.</footnote>
        <footnote id="F6">RSUs were granted and previously reported on a Form 4 filed January 5, 2021, where 12,500 RSUs vest ratably on each of the first five anniversaries of the January 4, 2021 date of grant.</footnote>
        <footnote id="F7">RSUs were granted and previously reported on a Form 4 filed January 5, 2024, where 12,500 RSUs vest ratably on each of the first five anniversaries of the January 4, 2024 date of grant.</footnote>
        <footnote id="F8">Shares withheld in a net transaction to satisfy the tax liability, in accordance with Issuer's trading policies, in connection with shares vested as reported in this Form 4.</footnote>
        <footnote id="F9">Includes 6,249 shares purchased through Issuer's Employee Stock Purchase Plan and approximately 6,470 shares held through Issuer's 401(k).</footnote>
        <footnote id="F10">This transaction was effected pursuant to a 10b5-1 trading plan adopted by the reporting person on June 6, 2024.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>Maria Cervantes de Burgreen, by Eva Yee, Attorney-In-Fact</signatureName>
        <signatureDate>2025-01-07</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
