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<headerData>
<submissionType>SCHEDULE 13G</submissionType>
<filerInfo>
<filer>
<filerCredentials>
<cik>0001086619</cik>
<ccc>XXXXXXXX</ccc>
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<liveTestFlag>LIVE</liveTestFlag>



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<formData>
<coverPageHeader>
<securitiesClassTitle>COM</securitiesClassTitle>
<eventDateRequiresFilingThisStatement>09/30/2025</eventDateRequiresFilingThisStatement>
<issuerInfo>
<issuerCik>0001365135</issuerCik>
<issuerName>Western Union CO</issuerName>
<issuerCusip>959802109</issuerCusip>
<issuerPrincipalExecutiveOfficeAddress>
<com:street1>7001 East Belleview Avenue</com:street1>
<com:city>Denver</com:city>
<com:stateOrCountry>CO</com:stateOrCountry>
<com:zipCode>80237</com:zipCode>
</issuerPrincipalExecutiveOfficeAddress>
</issuerInfo>
<designateRulesPursuantThisScheduleFiled>
<designateRulePursuantThisScheduleFiled>Rule 13d-1(b)</designateRulePursuantThisScheduleFiled>
</designateRulesPursuantThisScheduleFiled>
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<coverPageHeaderReportingPersonDetails>

<reportingPersonName>SCHRODER INVESTMENT MANAGEMENT GROUP</reportingPersonName>
<citizenshipOrOrganization>X0</citizenshipOrOrganization>
<reportingPersonBeneficiallyOwnedNumberOfShares>
<soleVotingPower>16948328</soleVotingPower>
<sharedVotingPower>0</sharedVotingPower>
<soleDispositivePower>16948328</soleDispositivePower>
<sharedDispositivePower>0</sharedDispositivePower>
</reportingPersonBeneficiallyOwnedNumberOfShares>
<reportingPersonBeneficiallyOwnedAggregateNumberOfShares>16948328</reportingPersonBeneficiallyOwnedAggregateNumberOfShares>
<aggregateAmountExcludesCertainSharesFlag>N</aggregateAmountExcludesCertainSharesFlag>
<classPercent>5.2</classPercent>
<typeOfReportingPerson>IA</typeOfReportingPerson>
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<reportingPersonName>Schroder Investment Management Limited</reportingPersonName>
<citizenshipOrOrganization>X0</citizenshipOrOrganization>
<reportingPersonBeneficiallyOwnedNumberOfShares>
<soleVotingPower>16948328</soleVotingPower>
<sharedVotingPower>0</sharedVotingPower>
<soleDispositivePower>16948328</soleDispositivePower>
<sharedDispositivePower>0</sharedDispositivePower>
</reportingPersonBeneficiallyOwnedNumberOfShares>
<reportingPersonBeneficiallyOwnedAggregateNumberOfShares>16948328</reportingPersonBeneficiallyOwnedAggregateNumberOfShares>
<aggregateAmountExcludesCertainSharesFlag>N</aggregateAmountExcludesCertainSharesFlag>
<classPercent>5.2</classPercent>
<typeOfReportingPerson>IA</typeOfReportingPerson>
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<items>
<item1>
<issuerName>Western Union CO</issuerName>
<issuerPrincipalExecutiveOfficeAddress>7001 East Belleview Avenue, Denver, Colorado, 80237</issuerPrincipalExecutiveOfficeAddress>
</item1>
<item2>
<filingPersonName>Schroder Investment Management Group</filingPersonName>
<principalBusinessOfficeOrResidenceAddress>1 London Wall Place, London, EC2Y 5AU, United Kingdom</principalBusinessOfficeOrResidenceAddress>
<citizenship>United Kingdom</citizenship>
</item2>
<item3>
<notApplicableFlag>N</notApplicableFlag>
<typeOfPersonFiling>IA</typeOfPersonFiling>
</item3>
<item4>
<amountBeneficiallyOwned>16,948,328</amountBeneficiallyOwned>
<classPercent>5.2</classPercent>
<numberOfSharesPersonHas>
<solePowerOrDirectToVote>16,948,328</solePowerOrDirectToVote>
<sharedPowerOrDirectToVote>0</sharedPowerOrDirectToVote>
<solePowerOrDirectToDispose>16,948,328</solePowerOrDirectToDispose>
<sharedPowerOrDirectToDispose>0</sharedPowerOrDirectToDispose>
</numberOfSharesPersonHas>
</item4>
<item5>
<notApplicableFlag>Y</notApplicableFlag>
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<notApplicableFlag>Y</notApplicableFlag>
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<notApplicableFlag>Y</notApplicableFlag>
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<item8>
<notApplicableFlag>Y</notApplicableFlag>
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<item9>
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<item10>
<notApplicableFlag>N</notApplicableFlag>
<certifications>By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11.</certifications>
</item10>
</items>
<signatureInformation>
<reportingPersonName>SCHRODER INVESTMENT MANAGEMENT GROUP</reportingPersonName>
<signatureDetails>
<signature>/s/ Thomas Darnowski</signature>
<title>Chief Executive Officer, Schroder Investment Management North America Inc.</title>
<date>11/13/2025</date>
</signatureDetails>
</signatureInformation>
<signatureInformation>
<reportingPersonName>Schroder Investment Management Limited</reportingPersonName>
<signatureDetails>
<signature>/s/ Schroder Investment Management Limited</signature>
<title>Schroder Investment Management Limited</title>
<date>11/13/2025</date>
</signatureDetails>
</signatureInformation>
<signatureComments>**Authorized by Power of Attorney to sign on behalf of the below Advisers:&#13;
Schroder Investment Management Group&#13;
Schroder Investment Management Limited</signatureComments>
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</edgarSubmission>
