<SEC-DOCUMENT>0001104659-25-045525.txt : 20250507
<SEC-HEADER>0001104659-25-045525.hdr.sgml : 20250507
<ACCEPTANCE-DATETIME>20250507160553
ACCESSION NUMBER:		0001104659-25-045525
CONFORMED SUBMISSION TYPE:	SCHEDULE 13G/A
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20250507
DATE AS OF CHANGE:		20250507

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Klaviyo, Inc.
		CENTRAL INDEX KEY:			0001835830
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-PREPACKAGED SOFTWARE [7372]
		ORGANIZATION NAME:           	06 Technology
		EIN:				000000000
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SCHEDULE 13G/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-94164
		FILM NUMBER:		25921287

	BUSINESS ADDRESS:	
		STREET 1:		125 SUMMER STREET, FLOOR 6
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02110
		BUSINESS PHONE:		800-338-1744

	MAIL ADDRESS:	
		STREET 1:		125 SUMMER STREET, FLOOR 6
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02110

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Accomplice Fund I, L.P.
		CENTRAL INDEX KEY:			0001636118
		ORGANIZATION NAME:           	
		EIN:				000000000
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SCHEDULE 13G/A

	BUSINESS ADDRESS:	
		STREET 1:		56 WAREHAM STREET, FLOOR 3
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02118
		BUSINESS PHONE:		617-588-2694

	MAIL ADDRESS:	
		STREET 1:		56 WAREHAM STREET, FLOOR 3
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02118

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	F/K/A VENTURES FUND I, L.P.
		DATE OF NAME CHANGE:	20150310
</SEC-HEADER>
<DOCUMENT>
<TYPE>SCHEDULE 13G/A
<SEQUENCE>1
<FILENAME>primary_doc.xml
<TEXT>
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    <submissionType>SCHEDULE 13G/A</submissionType>
    <previousAccessionNumber>0001104659-24-009202</previousAccessionNumber>
    <filerInfo>
      <filer>
        <filerCredentials>
          <!-- Field: Pseudo-Tag; ID: Name; Data: Accomplice Fund I, L.P. -->
          <cik>0001636118</cik>
          <ccc>XXXXXXXX</ccc>
        </filerCredentials>
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      <liveTestFlag>LIVE</liveTestFlag>



    </filerInfo>
  </headerData>
  <formData>
    <coverPageHeader>
      <amendmentNo>1</amendmentNo>
      <securitiesClassTitle>Series A Common Stock, $0.01</securitiesClassTitle>
      <eventDateRequiresFilingThisStatement>03/31/2025</eventDateRequiresFilingThisStatement>
      <issuerInfo>
        <issuerCik>0001835830</issuerCik>
        <issuerName>Klaviyo, Inc.</issuerName>
        <issuerCusip>49845K101</issuerCusip>
        <issuerPrincipalExecutiveOfficeAddress>
          <com:street1>125 Summer Street, 6th Floor</com:street1>
          <com:city>Boston</com:city>
          <com:stateOrCountry>MA</com:stateOrCountry>
          <com:zipCode>02110</com:zipCode>
        </issuerPrincipalExecutiveOfficeAddress>
      </issuerInfo>
      <designateRulesPursuantThisScheduleFiled>
        <designateRulePursuantThisScheduleFiled>Rule 13d-1(d)</designateRulePursuantThisScheduleFiled>
      </designateRulesPursuantThisScheduleFiled>
    </coverPageHeader>
    <coverPageHeaderReportingPersonDetails>


      <reportingPersonName>Accomplice Fund I, L.P.</reportingPersonName>
      <memberGroup>b</memberGroup>
      <citizenshipOrOrganization>DE</citizenshipOrOrganization>
      <reportingPersonBeneficiallyOwnedNumberOfShares>
        <soleVotingPower>11114110.00</soleVotingPower>
        <sharedVotingPower>0.00</sharedVotingPower>
        <soleDispositivePower>11114110.00</soleDispositivePower>
        <sharedDispositivePower>0.00</sharedDispositivePower>
      </reportingPersonBeneficiallyOwnedNumberOfShares>
      <reportingPersonBeneficiallyOwnedAggregateNumberOfShares>11114110.00</reportingPersonBeneficiallyOwnedAggregateNumberOfShares>
      <aggregateAmountExcludesCertainSharesFlag>N</aggregateAmountExcludesCertainSharesFlag>
      <classPercent>10.5</classPercent>
      <typeOfReportingPerson>PN</typeOfReportingPerson>
    </coverPageHeaderReportingPersonDetails>
    <coverPageHeaderReportingPersonDetails>

      <reportingPersonName>Accomplice Associates I, LLC</reportingPersonName>
      <memberGroup>b</memberGroup>
      <citizenshipOrOrganization>DE</citizenshipOrOrganization>
      <reportingPersonBeneficiallyOwnedNumberOfShares>
        <soleVotingPower>11114110.00</soleVotingPower>
        <sharedVotingPower>0.00</sharedVotingPower>
        <soleDispositivePower>11114110.00</soleDispositivePower>
        <sharedDispositivePower>0.00</sharedDispositivePower>
      </reportingPersonBeneficiallyOwnedNumberOfShares>
      <reportingPersonBeneficiallyOwnedAggregateNumberOfShares>11114110.00</reportingPersonBeneficiallyOwnedAggregateNumberOfShares>
      <aggregateAmountExcludesCertainSharesFlag>N</aggregateAmountExcludesCertainSharesFlag>
      <classPercent>10.5</classPercent>
      <typeOfReportingPerson>OO</typeOfReportingPerson>
    </coverPageHeaderReportingPersonDetails>
    <coverPageHeaderReportingPersonDetails>

      <reportingPersonName>Jeff Fagnan</reportingPersonName>
      <memberGroup>b</memberGroup>
      <citizenshipOrOrganization>X1</citizenshipOrOrganization>
      <reportingPersonBeneficiallyOwnedNumberOfShares>
        <soleVotingPower>11137154.00</soleVotingPower>
        <sharedVotingPower>0.00</sharedVotingPower>
        <soleDispositivePower>11137154.00</soleDispositivePower>
        <sharedDispositivePower>0.00</sharedDispositivePower>
      </reportingPersonBeneficiallyOwnedNumberOfShares>
      <reportingPersonBeneficiallyOwnedAggregateNumberOfShares>11137154.00</reportingPersonBeneficiallyOwnedAggregateNumberOfShares>
      <aggregateAmountExcludesCertainSharesFlag>N</aggregateAmountExcludesCertainSharesFlag>
      <classPercent>10.5</classPercent>
      <typeOfReportingPerson>IN</typeOfReportingPerson>
    </coverPageHeaderReportingPersonDetails>
    <items>
      <item1>
        <issuerName>Klaviyo, Inc.</issuerName>
        <issuerPrincipalExecutiveOfficeAddress>125 Summer Street, 6th Floor Boston, MA, 02110</issuerPrincipalExecutiveOfficeAddress>
      </item1>
      <item2>
        <filingPersonName>This Statement is being filed on behalf of Accomplice Fund I, L.P. ("ACC I"), Accomplice Associates I, LLC ("AA I"), the sole general partner of ACC I, and Jeff Fagnan ("Fagnan"), the sole Class A Member of AAI.</filingPersonName>
        <principalBusinessOfficeOrResidenceAddress>The principal business address of each of ACC I, AA I and Fagnan is 56 Wareham Street, Floor 3, Boston, MA 02118.</principalBusinessOfficeOrResidenceAddress>
        <citizenship>Each of ACC I and AA I is organized under the laws of Delaware. Fagnan is a citizen of the United States of America.</citizenship>
      </item2>
      <item3>
        <notApplicableFlag>Y</notApplicableFlag>
      </item3>
      <item4>
        <amountBeneficiallyOwned>As of the close of business on March 31, 2025, ACC I directly owns 26,720 shares of Series A Common Stock, par value $0.01 ("Series A Common Stock") and 11,087,390 shares of Series B Common Stock, par value $0.01 ("Series B Common Stock"). AA I is the sole general partner of ACC I. Fagnan is the sole Class A Member of AA I. No person other than the respective owner referred to herein is known to have the right to receive or the power to direct the receipt of dividends from or the proceeds from the sale of such shares. In addition, Fagnan may be deemed to beneficially own 44 shares of Series A Common Stock held by an immediate family member and 23,000 shares of Series A Common Stock held directly by Tailwater Investments, LLC, an entity wholly owned by Fagnan.</amountBeneficiallyOwned>
        <classPercent>As of the close of business on March 31, 2025, each of ACC I, AA I and Fagnan was the beneficial owner of approximately 10.5% of the Series A Common Stock, based on 94,574,036 shares of Series A Common Stock outstanding as of March 31, 2025, as reported by the Issuer in its Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on May 6, 2025, plus 11,087,390 shares of the Issuer's Series B Common Stock held by the reporting persons as of March 31, 2025, which are treated as converted into Series A Common Stock only for the purpose of computing the reporting person's beneficial ownership percentage pursuant to Rule 13d-3 of the Securities Exchange Act of 1934.</classPercent>
        <numberOfSharesPersonHas>
          <solePowerOrDirectToVote>ACC I: 11,114,110 shares
AA I: 11,114,110 shares
Fagnan: 11,137,154 shares</solePowerOrDirectToVote>
          <sharedPowerOrDirectToVote>N/A</sharedPowerOrDirectToVote>
          <solePowerOrDirectToDispose>ACC I: 11,114,110 shares
AA I: 11,114,110 shares
Fagnan: 11,137,154 shares</solePowerOrDirectToDispose>
          <sharedPowerOrDirectToDispose>N/A</sharedPowerOrDirectToDispose>
        </numberOfSharesPersonHas>
      </item4>
      <item5>
        <notApplicableFlag>Y</notApplicableFlag>
      </item5>
      <item6>
        <notApplicableFlag>Y</notApplicableFlag>
      </item6>
      <item7>
        <notApplicableFlag>Y</notApplicableFlag>
      </item7>
      <item8>
        <notApplicableFlag>Y</notApplicableFlag>
      </item8>
      <item9>
        <notApplicableFlag>Y</notApplicableFlag>
      </item9>
      <item10>
        <notApplicableFlag>Y</notApplicableFlag>
      </item10>
    </items>
    <signatureInformation>
      <reportingPersonName>Accomplice Fund I, L.P.</reportingPersonName>
      <signatureDetails>
        <signature>/s/ Frank Castellucci</signature>
        <title>Frank Castellucci, General Counsel and Secretary of general partner</title>
        <date>05/07/2025</date>
      </signatureDetails>
    </signatureInformation>
    <signatureInformation>
      <reportingPersonName>Accomplice Associates I, LLC</reportingPersonName>
      <signatureDetails>
        <signature>/s/ Frank Castellucci</signature>
        <title>Frank Castellucci, General Counsel and Secretary</title>
        <date>05/07/2025</date>
      </signatureDetails>
    </signatureInformation>
    <signatureInformation>
      <reportingPersonName>Jeff Fagnan</reportingPersonName>
      <signatureDetails>
        <signature>/s/ Jeff Fagnan</signature>
        <title>Jeff Fagnan</title>
        <date>05/07/2025</date>
      </signatureDetails>
    </signatureInformation>
  </formData>
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</SEC-DOCUMENT>
