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      <periodOfReport>06-30-2025</periodOfReport>
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        <dateDeniedExpired>03-04-2026</dateDeniedExpired>
        <dateReported>08-01-2025</dateReported>
        <reasonForNonConfidentiality>Confidential Treatment Expired</reasonForNonConfidentiality>
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        <name>Banco Santander, S.A.</name>
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          <com:street1>Ciudad Grupo Santander</com:street1>
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    <signatureBlock>
      <name>Ruben Navajo</name>
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      <signature>/s/ Ruben Navajo</signature>
      <city>Madrid</city>
      <stateOrCountry>U3</stateOrCountry>
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