<SEC-DOCUMENT>0000899243-22-020478.txt : 20220601
<SEC-HEADER>0000899243-22-020478.hdr.sgml : 20220601
<ACCEPTANCE-DATETIME>20220601173000
ACCESSION NUMBER:		0000899243-22-020478
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20220527
FILED AS OF DATE:		20220601
DATE AS OF CHANGE:		20220601

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Smith Christopher M
		CENTRAL INDEX KEY:			0001436707

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-41409
		FILM NUMBER:		22988444

	MAIL ADDRESS:	
		STREET 1:		125 CONSTITUTION DRIVE
		CITY:			MENLO PARK
		STATE:			CA
		ZIP:			94025

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			QuidelOrtho Corp
		CENTRAL INDEX KEY:			0001906324
		STANDARD INDUSTRIAL CLASSIFICATION:	IN VITRO & IN VIVO DIAGNOSTIC SUBSTANCES [2835]
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		9975 SUMMERS RIDGE ROAD
		CITY:			SAN DIEGO
		STATE:			CA
		ZIP:			92121
		BUSINESS PHONE:		(858) 552-1100

	MAIL ADDRESS:	
		STREET 1:		9975 SUMMERS RIDGE ROAD
		CITY:			SAN DIEGO
		STATE:			CA
		ZIP:			92121

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Coronado Topco, Inc.
		DATE OF NAME CHANGE:	20220124
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>doc4.xml
<DESCRIPTION>FORM 4 SUBMISSION
<TEXT>
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<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2022-05-27</periodOfReport>

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    <issuer>
        <issuerCik>0001906324</issuerCik>
        <issuerName>QuidelOrtho Corp</issuerName>
        <issuerTradingSymbol>QDEL</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001436707</rptOwnerCik>
            <rptOwnerName>Smith Christopher M</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>9975 SUMMERS RIDGE ROAD</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>SAN DIEGO</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>92121</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
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        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2022-05-27</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
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            <transactionTimeliness>
                <value></value>
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            <transactionAmounts>
                <transactionShares>
                    <value>34554</value>
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                <transactionPricePerShare>
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                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Stock Options</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>119.06</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2022-05-27</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
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            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>207984</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.00</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
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            <exerciseDate>
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            <expirationDate>
                <value>2029-12-20</value>
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    <footnotes>
        <footnote id="F1">Pursuant to the Business Combination Agreement, dated as of December 22, 2021 (the &quot;Business Combination Agreement&quot;) by and among Quidel Corporation, Ortho Clinical Diagnostics Holdings plc (&quot;Ortho&quot;), QuidelOrtho Corporation (&quot;QuidelOrtho&quot;), Orca Holdco, Inc., Laguna Merger Sub, Inc. and Orca Holdco 2, Inc., each ordinary share of Ortho beneficially owned by the Reporting Person at the effective time of the transaction contemplated by the Business Combination Agreement was exchanged for (i) 0.1055 shares of common stock of QuidelOrtho and (ii) $7.14 in cash.</footnote>
        <footnote id="F2">Includes 29,418 restricted stock awards, of which 2,101 shares will vest on July 28, 2022, 8,404 shares will vest on September 9, 2022, 2,100 shares will vest on February 28, 2023 and 8,406 shares will vest on May 27, 2023.</footnote>
        <footnote id="F3">Pursuant to the Business Combination Agreement, each Ortho stock option was converted into an equal number of Stock Options to purchase shares of common stock of QuidelOrtho on the same terms and conditions (including applicable vesting conditions), except as adjusted by the Business Combination Agreement.</footnote>
        <footnote id="F4">Vested in full.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Phillip S. Askim, attorney-in-fact for Christopher M. Smith</signatureName>
        <signatureDate>2022-06-01</signatureDate>
    </ownerSignature>
</ownershipDocument>
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</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
