<SEC-DOCUMENT>0000950170-23-060602.txt : 20231107
<SEC-HEADER>0000950170-23-060602.hdr.sgml : 20231107
<ACCEPTANCE-DATETIME>20231107211312
ACCESSION NUMBER:		0000950170-23-060602
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20231103
FILED AS OF DATE:		20231107
DATE AS OF CHANGE:		20231107

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Agarwal Vineet
		CENTRAL INDEX KEY:			0001997973

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-39062
		FILM NUMBER:		231385694

	MAIL ADDRESS:	
		STREET 1:		C/O KORRO BIO, INC.
		STREET 2:		ONE KENDALL SQUARE, BUILDING 600-700
		CITY:			CAMBRIDGE
		STATE:			MA
		ZIP:			02139

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Korro Bio, Inc.
		CENTRAL INDEX KEY:			0001703647
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				472324450
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		ONE KENDALL SQUARE. BUILDING 600-700
		STREET 2:		SUITE 6-401
		CITY:			CAMBRIDGE
		STATE:			MA
		ZIP:			02139
		BUSINESS PHONE:		617-468-1900

	MAIL ADDRESS:	
		STREET 1:		ONE KENDALL SQUARE. BUILDING 600-700
		STREET 2:		SUITE 6-401
		CITY:			CAMBRIDGE
		STATE:			MA
		ZIP:			02139

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Frequency Therapeutics, Inc.
		DATE OF NAME CHANGE:	20170412
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
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    <schemaVersion>X0508</schemaVersion>

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    <periodOfReport>2023-11-03</periodOfReport>

    <issuer>
        <issuerCik>0001703647</issuerCik>
        <issuerName>Korro Bio, Inc.</issuerName>
        <issuerTradingSymbol>KRRO</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001997973</rptOwnerCik>
            <rptOwnerName>Agarwal Vineet</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O KORRO BIO, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>ONE KENDALL SQUARE, BUILDING 600-700</rptOwnerStreet2>
            <rptOwnerCity>CAMBRIDGE</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02139</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>false</isDirector>
            <isOfficer>true</isOfficer>
            <isTenPercentOwner>false</isTenPercentOwner>
            <isOther>false</isOther>
            <officerTitle>Chief Financial Officer</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <aff10b5One>false</aff10b5One>

    <derivativeTable>
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            <securityTitle>
                <value>Stock Option (Right to Buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>11.68</value>
                <footnoteId id="F1"/>
                <footnoteId id="F2"/>
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                <footnoteId id="F2"/>
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            <transactionAmounts>
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                    <footnoteId id="F2"/>
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                    <footnoteId id="F1"/>
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                <value>2031-05-29</value>
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        <derivativeTransaction>
            <securityTitle>
                <value>Stock Option (Right to Buy)</value>
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            <expirationDate>
                <value>2032-01-26</value>
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                <equitySwapInvolved>false</equitySwapInvolved>
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            <expirationDate>
                <value>2033-01-23</value>
            </expirationDate>
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                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>2591</value>
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                    <footnoteId id="F2"/>
                </underlyingSecurityShares>
            </underlyingSecurity>
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                <sharesOwnedFollowingTransaction>
                    <value>2591</value>
                </sharesOwnedFollowingTransaction>
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            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
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        </derivativeTransaction>
        <derivativeTransaction>
            <securityTitle>
                <value>Stock Option (Right to Buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>14.98</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2023-11-03</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>false</equitySwapInvolved>
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            <transactionAmounts>
                <transactionShares>
                    <value>46547</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.00</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F9"/>
            </exerciseDate>
            <expirationDate>
                <value>2033-11-02</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>46547</value>
                </underlyingSecurityShares>
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                <sharesOwnedFollowingTransaction>
                    <value>46547</value>
                </sharesOwnedFollowingTransaction>
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            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Under the terms of an Agreement and Plan of Merger dated as of July 14, 2023 by and among Korro Bio Ops, Inc. (f/k/a Korro Bio, Inc., &quot;Legacy Korro&quot;), the Issuer (f/k/a Frequency Therapeutics, Inc.) and Frequency Merger Sub, Inc., a wholly owned subsidiary of the Issuer (&quot;Merger Sub&quot;), on November 3, 2023, Merger Sub merged with and into Legacy Korro (the &quot;Merger&quot;), with Legacy Korro surviving the Merger as a wholly owned subsidiary of the Issuer. Upon the closing of the Merger, each outstanding option to purchase shares of Legacy Korro common stock issued under the Korro Bio, Inc. 2019 Stock Incentive Plan (the &quot;2019 Plan&quot;) was assumed by the Issuer and converted into an option to purchase the Issuer's common stock, at an exchange ratio of 0.049688 per share, on the same terms and conditions as were applicable under the 2019 Plan prior to the Merger, after giving effect to a reverse stock split of the Issuer's common stock of 1-for-50.</footnote>
        <footnote id="F2">(Continued from Footnote 1) Subsequent to the Merger, the name of the Issuer was changed from Frequency Therapeutics, Inc. to Korro Bio, Inc.</footnote>
        <footnote id="F3">The shares subject to the option vest as to 25% of the shares on May 11, 2022, with the remainder vesting in 36 equal monthly installments thereafter, subject to the Reporting Person's continued service on each such vesting date.</footnote>
        <footnote id="F4">Received in exchange for a stock option to acquire 822,539 shares of Legacy Korro common stock issued under the 2019 Plan pursuant to the Merger Agreement.</footnote>
        <footnote id="F5">The shares subject to the option vest as to 25% of the shares on January 27, 2023, with the remainder vesting in 36 equal monthly installments thereafter, subject to the Reporting Person's continued service on each such vesting date.</footnote>
        <footnote id="F6">Received in exchange for a stock option to acquire 120,000 shares of Legacy Korro common stock issued under the 2019 Plan pursuant to the Merger Agreement.</footnote>
        <footnote id="F7">The shares subject to the option vest as to 25% of the shares on January 1, 2024, with the remainder vesting in 36 equal monthly installments thereafter, subject to the Reporting Person's continued service on each such vesting date.</footnote>
        <footnote id="F8">Received in exchange for a stock option to acquire 52,156 shares of Legacy Korro common stock issued under the 2019 Plan pursuant to the Merger Agreement.</footnote>
        <footnote id="F9">The shares subject to the option vest in 48 equal monthly installments commencing from November 3, 2023, subject to the Reporting Person's continued service on each such vesting date.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Shelby Walker, Attorney-in-fact</signatureName>
        <signatureDate>2023-11-07</signatureDate>
    </ownerSignature>
</ownershipDocument>
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</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
