﻿<?xml version="1.0" encoding="utf-8"?>
<Return xmlns="http://www.irs.gov/efile" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.irs.gov/efile" returnVersion="2025v4.0">
  <ReturnHeader binaryAttachmentCnt="0">
    <ReturnTs>2026-02-26T18:03:10-06:00</ReturnTs>
    <TaxPeriodEndDt>2025-12-31</TaxPeriodEndDt>
    <PreparerFirmGrp>
      <PreparerFirmEIN>992277914</PreparerFirmEIN>
      <PreparerFirmName>
        <BusinessNameLine1Txt>EAG NEW ENGLAND LLC</BusinessNameLine1Txt>
      </PreparerFirmName>
      <PreparerUSAddress>
        <AddressLine1Txt>160 FEDERAL STREET 9TH FLOOR</AddressLine1Txt>
        <CityNm>BOSTON</CityNm>
        <StateAbbreviationCd>MA</StateAbbreviationCd>
        <ZIPCd>02110</ZIPCd>
      </PreparerUSAddress>
    </PreparerFirmGrp>
    <ReturnTypeCd>990EZ</ReturnTypeCd>
    <TaxPeriodBeginDt>2025-01-01</TaxPeriodBeginDt>
    <Filer>
      <EIN>452491829</EIN>
      <BusinessName>
        <BusinessNameLine1Txt>THE MS CENTER OF BOSTON A NONPROFIT</BusinessNameLine1Txt>
        <BusinessNameLine2Txt>CORPORATION</BusinessNameLine2Txt>
      </BusinessName>
      <BusinessNameControlTxt>MSCE</BusinessNameControlTxt>
      <PhoneNum>7815918305</PhoneNum>
      <USAddress>
        <AddressLine1Txt>110 CEDAR STREET 110</AddressLine1Txt>
        <CityNm>WELLESLEY</CityNm>
        <StateAbbreviationCd>MA</StateAbbreviationCd>
        <ZIPCd>02481</ZIPCd>
      </USAddress>
    </Filer>
    <BusinessOfficerGrp>
      <PersonNm>JOSHUA KATZ</PersonNm>
      <PersonTitleTxt>PRESIDENT</PersonTitleTxt>
      <PhoneNum>7815918305</PhoneNum>
      <SignatureDt>2026-02-26</SignatureDt>
      <DiscussWithPaidPreparerInd>1</DiscussWithPaidPreparerInd>
    </BusinessOfficerGrp>
    <PreparerPersonGrp>
      <PreparerPersonNm>EUGENE BORGONZI</PreparerPersonNm>
      <PTIN>P01269879</PTIN>
      <PhoneNum>6172276161</PhoneNum>
    </PreparerPersonGrp>
    <TaxYr>2025</TaxYr>
    <BuildTS>2025-03-06 01:10:19Z</BuildTS>
  </ReturnHeader>
  <ReturnData documentCnt="5">
    <IRS990EZ documentId="RetDoc1234200001" referenceDocumentId="RetDoc1051800001 RetDoc2278000001">
      <MethodOfAccountingCashInd>X</MethodOfAccountingCashInd>
      <WebsiteAddressTxt>WWW.ELCFOUNDATION.ORG</WebsiteAddressTxt>
      <Organization501c3Ind referenceDocumentId="RetDoc1039100001">X</Organization501c3Ind>
      <TypeOfOrganizationCorpInd>X</TypeOfOrganizationCorpInd>
      <GrossReceiptsAmt>72188</GrossReceiptsAmt>
      <InfoInScheduleOPartIInd>X</InfoInScheduleOPartIInd>
      <ContributionsGiftsGrantsEtcAmt>60902</ContributionsGiftsGrantsEtcAmt>
      <InvestmentIncomeAmt>11286</InvestmentIncomeAmt>
      <TotalRevenueAmt>72188</TotalRevenueAmt>
      <GrantsAndSimilarAmountsPaidAmt>14069</GrantsAndSimilarAmountsPaidAmt>
      <FeesAndOtherPymtToIndCntrctAmt>3677</FeesAndOtherPymtToIndCntrctAmt>
      <PrintingPublicationsPostageAmt>944</PrintingPublicationsPostageAmt>
      <OtherExpensesTotalAmt>24663</OtherExpensesTotalAmt>
      <TotalExpensesAmt>43353</TotalExpensesAmt>
      <ExcessOrDeficitForYearAmt>28835</ExcessOrDeficitForYearAmt>
      <NetAssetsOrFundBalancesBOYAmt>342970</NetAssetsOrFundBalancesBOYAmt>
      <OtherChangesInNetAssetsAmt>0</OtherChangesInNetAssetsAmt>
      <NetAssetsOrFundBalancesEOYAmt>371805</NetAssetsOrFundBalancesEOYAmt>
      <CashSavingsAndInvestmentsGrp>
        <BOYAmt>342970</BOYAmt>
        <EOYAmt>371805</EOYAmt>
      </CashSavingsAndInvestmentsGrp>
      <Form990TotalAssetsGrp>
        <BOYAmt>342970</BOYAmt>
        <EOYAmt>371805</EOYAmt>
      </Form990TotalAssetsGrp>
      <SumOfTotalLiabilitiesGrp>
        <BOYAmt>0</BOYAmt>
        <EOYAmt>0</EOYAmt>
      </SumOfTotalLiabilitiesGrp>
      <NetAssetsOrFundBalancesGrp>
        <BOYAmt>342970</BOYAmt>
        <EOYAmt>371805</EOYAmt>
      </NetAssetsOrFundBalancesGrp>
      <InfoInScheduleOPartIIIInd>X</InfoInScheduleOPartIIIInd>
      <PrimaryExemptPurposeTxt>TO ASSIST WITH THE MANY UNMET NEEDS FACED BY MULTIPLE SCLEROSIS PATIENTS, THEIR FAMILIES AND CAREGIVERS BY HELPING PATIENTS WITH LIMITED FINANCIAL RESOURCES OBTAIN DURABLE MEDICAL EQUIPMENT, HOME MODIFICATIONS, GYM MEMBERSHIPS, HOME PHYSICAL THERAPY ASSESSMENTS AND MORE. THE ORGANIZATION ALSO SUPPORTS EDUCATIONAL PROGRAMS AND A FINANCIAL ASSISTANCE PROGRAM FOR PEOPLE WITH MULTIPLE SCLEROSIS.</PrimaryExemptPurposeTxt>
      <ProgramSrvcAccomplishmentGrp>
        <DescriptionProgramSrvcAccomTxt>THE FOUNDATION SPONSORS A NUMBER OF PROGRAMS AND GROUPS FOR PATIENTS WITH MULTIPLE SCLEROSIS, THEIR FAMILIES, AND CAREGIVERS. WE ALSO OPEN THESE OFFERINGS TO THE COMMUNITY. 1) ANNUAL ELC EDUCATION DAY TYPICALLY INCLUDES A HEALTH FAIR, BRUNCH, SPECIAL PRESENTATIONS BY OUR PHYSICIANS, AND Q&amp;A. ALL ARE WELCOME. 2) WELLNESS SERIES PRESENTATIONS BY OUR PHYSICIANS AND GUEST EXPERTS</DescriptionProgramSrvcAccomTxt>
        <GrantsAndAllocationsAmt>0</GrantsAndAllocationsAmt>
        <ProgramServiceExpensesAmt>23156</ProgramServiceExpensesAmt>
      </ProgramSrvcAccomplishmentGrp>
      <ProgramSrvcAccomplishmentGrp>
        <DescriptionProgramSrvcAccomTxt>TO SUPPORT THE NEEDS OF PATIENTS WITH MULTIPLE SCLEROSIS, THEIR FAMILIES AND CAREGIVERS. THE CENTER SUPPORTS A FINANCIAL ASSISTANCE PROGRAM FOR PATIENTS WITH MULTIPLE SCLEROSIS, &amp; PATIENTS' SUPPORT GROUPS. THE FINANCIAL ASSISTANCE PROGRAM HELPS DECREASE THE FINANCIAL BURDEN OF SUCH NEEDS SUCH AS: 1) HOME MODIFICATIONS, 2) DURABLE MEDICAL EQUIPMENT AND ASSISTIVE DEVICES, 3) DRIVING EVALUATIONS, 4) RESPITE CARE, 5) SERVICE DOG PROGRAM EXPENSES, &amp; 6) OCCUPATIONAL THERAPY EVALUATIONS.</DescriptionProgramSrvcAccomTxt>
        <GrantsAndAllocationsAmt>14069</GrantsAndAllocationsAmt>
        <ProgramServiceExpensesAmt>14125</ProgramServiceExpensesAmt>
      </ProgramSrvcAccomplishmentGrp>
      <TotalProgramServiceExpensesAmt>37281</TotalProgramServiceExpensesAmt>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>ELLEN LATHI</PersonNm>
        <TitleTxt>TREASURER/DIRECTOR</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>0.08</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>JOSHUA KATZ</PersonNm>
        <TitleTxt>PRESIDENT/DIRECTOR</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>1.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>MARISSA SHACKLETON</PersonNm>
        <TitleTxt>SECRETARY/DIRECTOR</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>4.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>ANDREW BOULEY</PersonNm>
        <TitleTxt>DIRECTOR</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>1.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>JEAN FEDER-EWELL</PersonNm>
        <TitleTxt>DIRECTOR</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>0.08</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <InfoInScheduleOPartVInd>X</InfoInScheduleOPartVInd>
      <ActivitiesNotPreviouslyRptInd>0</ActivitiesNotPreviouslyRptInd>
      <ChgMadeToOrgnzngDocNotRptInd>0</ChgMadeToOrgnzngDocNotRptInd>
      <OrganizationHadUBIInd>0</OrganizationHadUBIInd>
      <SubjectToProxyTaxInd>0</SubjectToProxyTaxInd>
      <OrganizationDissolvedEtcInd>0</OrganizationDissolvedEtcInd>
      <DirectIndirectPltclExpendAmt>0</DirectIndirectPltclExpendAmt>
      <MadeLoansToFromOfficersInd>0</MadeLoansToFromOfficersInd>
      <TaxImposedUnderIRC4911Amt>0</TaxImposedUnderIRC4911Amt>
      <TaxImposedUnderIRC4912Amt>0</TaxImposedUnderIRC4912Amt>
      <TaxImposedUnderIRC4955Amt>0</TaxImposedUnderIRC4955Amt>
      <EngagedInExcessBenefitTransInd>0</EngagedInExcessBenefitTransInd>
      <TaxImposedOnOrganizationMgrAmt>0</TaxImposedOnOrganizationMgrAmt>
      <TaxReimbursedByOrganizationAmt>0</TaxReimbursedByOrganizationAmt>
      <ProhibitedTaxShelterTransInd>0</ProhibitedTaxShelterTransInd>
      <StatesWhereCopyOfReturnIsFldCd>MA</StatesWhereCopyOfReturnIsFldCd>
      <BooksInCareOfDetail>
        <PersonNm>ELLEN LATHI MD</PersonNm>
        <USAddress>
          <AddressLine1Txt>110 CEDAR STREET STE 110</AddressLine1Txt>
          <CityNm>WELLESLEY</CityNm>
          <StateAbbreviationCd>MA</StateAbbreviationCd>
          <ZIPCd>02481</ZIPCd>
        </USAddress>
        <PhoneNum>7815918305</PhoneNum>
      </BooksInCareOfDetail>
      <ForeignFinancialAccountInd>0</ForeignFinancialAccountInd>
      <ForeignOfficeInd>0</ForeignOfficeInd>
      <DonorAdvisedFndsInd>0</DonorAdvisedFndsInd>
      <OperateHospitalInd>0</OperateHospitalInd>
      <TanningServicesProvidedInd>0</TanningServicesProvidedInd>
      <RelatedOrganizationCtrlEntInd>0</RelatedOrganizationCtrlEntInd>
      <PoliticalCampaignActyInd>0</PoliticalCampaignActyInd>
      <LobbyingActivitiesInd>0</LobbyingActivitiesInd>
      <SchoolOperatingInd>0</SchoolOperatingInd>
      <TrnsfrExmptNonChrtblRltdOrgInd>0</TrnsfrExmptNonChrtblRltdOrgInd>
      <PartVIOfCompOfHghstPdEmplTxt>NONE</PartVIOfCompOfHghstPdEmplTxt>
      <PartVIHghstPdCntrctProfSrvcTxt>NONE</PartVIHghstPdCntrctProfSrvcTxt>
      <FiledScheduleAInd>1</FiledScheduleAInd>
    </IRS990EZ>
    <IRS990ScheduleA documentId="RetDoc1039100001">
      <PublicOrganization170Ind>X</PublicOrganization170Ind>
      <GiftsGrantsContriRcvd170Grp>
        <CurrentTaxYearMinus4YearsAmt>34994</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>21608</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>47686</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>68640</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>60902</CurrentTaxYearAmt>
        <TotalAmt>233830</TotalAmt>
      </GiftsGrantsContriRcvd170Grp>
      <TotalCalendarYear170Grp>
        <CurrentTaxYearMinus4YearsAmt>34994</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>21608</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>47686</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>68640</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>60902</CurrentTaxYearAmt>
        <TotalAmt>233830</TotalAmt>
      </TotalCalendarYear170Grp>
      <SubstantialContributorsTotAmt>115968</SubstantialContributorsTotAmt>
      <PublicSupportTotal170Amt>117862</PublicSupportTotal170Amt>
      <GrossInvestmentIncome170Grp>
        <CurrentTaxYearMinus4YearsAmt>0</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>0</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>2744</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>10715</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>11286</CurrentTaxYearAmt>
        <TotalAmt>24745</TotalAmt>
      </GrossInvestmentIncome170Grp>
      <TotalSupportAmt>258575</TotalSupportAmt>
      <PublicSupportCY170Pct>0.45580</PublicSupportCY170Pct>
      <PublicSupportPY170Pct>0.48480</PublicSupportPY170Pct>
      <ThirtyThrPctSuprtTestsCY170Ind>X</ThirtyThrPctSuprtTestsCY170Ind>
      <Form990ScheduleAPartVIGrp>
        <FormAndLineReferenceDesc>SCHEDULE A, PART VI, LIST OF UNUSUAL GRANTS:</FormAndLineReferenceDesc>
        <ExplanationTxt>DESCRIPTION: BEQUEST FOR GENERAL PROGRAM SUPPORT DATE: 05/17/22 AMOUNT: 50000.</ExplanationTxt>
      </Form990ScheduleAPartVIGrp>
    </IRS990ScheduleA>
    <IRS990ScheduleB documentId="RetDoc1234500001">
      <ContributorInformationGrp>
        <ContributorNum>RESTRICTED</ContributorNum>
        <ContributorBusinessName>
          <BusinessNameLine1>RESTRICTED</BusinessNameLine1>
        </ContributorBusinessName>
        <ContributorUSAddress>
          <AddressLine1>RESTRICTED</AddressLine1>
          <AddressLine2>RESTRICTED</AddressLine2>
          <City>RESTRICTED</City>
          <State>RESTRICTED</State>
          <ZIPCode>RESTRICTED</ZIPCode>
        </ContributorUSAddress>
        <TotalContributionsAmt>RESTRICTED</TotalContributionsAmt>
      </ContributorInformationGrp>
    </IRS990ScheduleB>
    <IRS990ScheduleO documentId="RetDoc1051800001">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990-EZ, PART I, LINE 4 - OTHER INVESTMENT INCOME</FormAndLineReferenceDesc>
        <ExplanationTxt>DESCRIPTION: INTEREST INCOME. AMOUNT: 11,286.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990-EZ, PART I, LINE 16 - OTHER EXPENSES</FormAndLineReferenceDesc>
        <ExplanationTxt>DESCRIPTION: STATE FILING FEE. AMOUNT: 73. DESCRIPTION: INSURANCE. AMOUNT: 1,485. DESCRIPTION: SUPPORT &amp; EDUCATION GROUPS. AMOUNT: 22,267. DESCRIPTION: WEBSITE EXPENSES. AMOUNT: 167. DESCRIPTION: ONLINE &amp; CREDIT CARD PROCESSING FEES. AMOUNT: 249. DESCRIPTION: BANK FEES. AMOUNT: 152. DESCRIPTION: MARKETING. AMOUNT: 270. TOTAL TO FORM 990-EZ, LINE 16: 24,663.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990EZ, PART I, LINE 10</FormAndLineReferenceDesc>
        <ExplanationTxt>NO ONE PERSON RECEIVED MORE THAN $5,000 IN FINANCIAL ASSISTANCE DURING 2025. THEREFORE, IN ACCORDANCE WITH THE IRS INSTRUCTIONS, NO GRANTEES ARE REPORTED IN SCHEDULE O.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
    <TransferPrsnlBnftContractsDecl documentId="RetDoc2278000001">
      <DeclarationDesc>THE ORGANIZATION DID NOT, DURING THE YEAR, RECEIVE ANY FUNDS, DIRECTLY,OR INDIRECTLY, TO PAY PREMIUMS ON A PERSONAL BENEFIT CONTRACT.THE ORGANIZATION, DID NOT, DURING THE YEAR, PAY ANY PREMIUMS, DIRECTLY,OR INDIRECTLY, ON A PERSONAL BENEFIT CONTRACT.</DeclarationDesc>
    </TransferPrsnlBnftContractsDecl>
  </ReturnData>
</Return>