<?xml version="1.0" encoding="UTF-8"?>
<npx:edgarSubmission xmlns:npx="http://www.sec.gov/edgar/npx" xmlns:com="http://www.sec.gov/edgar/common">
  <!--Generated by Workiva-->
  <npx:headerData>
    <npx:submissionType>N-PX</npx:submissionType>
    <npx:filerInfo>
      <npx:registrantType>IM</npx:registrantType>
      <npx:liveTestFlag>LIVE</npx:liveTestFlag>
      <npx:filer>
        <npx:issuerCredentials>
          <npx:cik>0001403385</npx:cik>
          <npx:ccc>XXXXXXXX</npx:ccc>
        </npx:issuerCredentials>
      </npx:filer>
      <npx:flags>
        <npx:overrideInternetFlag>false</npx:overrideInternetFlag>
        <npx:confirmingCopyFlag>false</npx:confirmingCopyFlag>
      </npx:flags>
      <npx:periodOfReport>06/30/2026</npx:periodOfReport>
    </npx:filerInfo>
  </npx:headerData>
  <npx:formData>
    <npx:coverPage>
      <npx:yearOrQuarter>YEAR</npx:yearOrQuarter>
      <npx:reportCalendarYear>2026</npx:reportCalendarYear>
      <npx:reportingPerson>
        <npx:name>Symetra Financial CORP</npx:name>
        <npx:phoneNumber>425-256-5436</npx:phoneNumber>
        <npx:address>
          <com:street1>777 108th AVENUE NE</com:street1>
          <com:city>Bellevue</com:city>
          <com:stateOrCountry>WA</com:stateOrCountry>
          <com:zipCode>98004-5135</com:zipCode>
        </npx:address>
      </npx:reportingPerson>
      <npx:reportInfo>
        <npx:reportType>INSTITUTIONAL MANAGER NOTICE REPORT</npx:reportType>
        <npx:noticeExplanation>ALL VOTES BY OTHER PERSONS</npx:noticeExplanation>
        <npx:confidentialTreatment>N</npx:confidentialTreatment>
      </npx:reportInfo>
      <npx:fileNumber>028-20275</npx:fileNumber>
      <npx:leiNumber>5493004WNE7ORFD3AZ54</npx:leiNumber>
      <npx:otherManagersInfo>
        <npx:otherManager>
          <npx:icaOr13FFileNumber>028-20275</npx:icaOr13FFileNumber>
          <npx:crdNumber>312176</npx:crdNumber>
          <npx:otherFileNumber>801-120578</npx:otherFileNumber>
          <npx:leiNumberOM>549300GPUSUTJ741PG93</npx:leiNumberOM>
          <npx:managerName>Symetra Investment Management Co</npx:managerName>
        </npx:otherManager>
      </npx:otherManagersInfo>
      <npx:explanatoryInformation>
        <npx:explanatoryChoice>N</npx:explanatoryChoice>
      </npx:explanatoryInformation>
    </npx:coverPage>
    <npx:summaryPage>
      <npx:otherIncludedManagersCount>0</npx:otherIncludedManagersCount>
    </npx:summaryPage>
    <npx:signaturePage>
      <npx:reportingPerson>Symetra Financial CORP</npx:reportingPerson>
      <npx:txSignature>Erika Witt</npx:txSignature>
      <npx:txPrintedSignature>Erika Witt</npx:txPrintedSignature>
      <npx:txTitle>AVP Finance</npx:txTitle>
      <npx:txAsOfDate>08/28/2026</npx:txAsOfDate>
    </npx:signaturePage>
  </npx:formData>
</npx:edgarSubmission>
