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          <ccc>XXXXXXXX</ccc>
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        <classId>C000052853</classId>
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      <regStreet1>550 SCIENCE DRIVE</regStreet1>
      <regCity>MADISON</regCity>
      <regStateConditional regCountry="US" regState="US-WI"/>
      <regZipOrPostalCode>53711</regZipOrPostalCode>
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      <seriesName>Madison Target Retirement 2020 Fund</seriesName>
      <seriesId>S000019110</seriesId>
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      <repPdEnd>2025-12-31</repPdEnd>
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    <signature>
      <ncom:dateSigned>2025-04-14</ncom:dateSigned>
      <ncom:nameOfApplicant>ULTRA SERIES FUND</ncom:nameOfApplicant>
      <ncom:signature>Greg Hoppe</ncom:signature>
      <ncom:signerName>Greg Hoppe</ncom:signerName>
      <ncom:title>Chief Financial Officer</ncom:title>
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