﻿<?xml version="1.0" encoding="utf-8"?>
<Return xmlns="http://www.irs.gov/efile" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" returnVersion="2009v1.7" xsi:schemaLocation="http://www.irs.gov/efile">
  <ReturnHeader binaryAttachmentCount="0">
    <Timestamp>2011-06-15T13:52:19-07:00</Timestamp>
    <TaxPeriodEndDate>2010-07-31</TaxPeriodEndDate>
    <PreparerFirm>
      <PreparerFirmBusinessName>
        <BusinessNameLine1>TCA Partners LLP</BusinessNameLine1>
      </PreparerFirmBusinessName>
      <PreparerFirmUSAddress>
        <AddressLine1>1111 East Herndon Avenue Suite 211</AddressLine1>
        <City>Fresno</City>
        <State>CA</State>
        <ZIPCode>93720</ZIPCode>
      </PreparerFirmUSAddress>
    </PreparerFirm>
    <ReturnType>990</ReturnType>
    <TaxPeriodBeginDate>2009-08-01</TaxPeriodBeginDate>
    <Filer>
      <EIN>942650833</EIN>
      <Name>
        <BusinessNameLine1>Mathematical Sciences Research Institute</BusinessNameLine1>
      </Name>
      <NameControl>MATH</NameControl>
      <Phone>5106420143</Phone>
      <USAddress>
        <AddressLine1>17 Gauss Way</AddressLine1>
        <City>Berkeley</City>
        <State>CA</State>
        <ZIPCode>94720</ZIPCode>
      </USAddress>
    </Filer>
    <Officer>
      <Name>Phyllis Carter</Name>
      <Title>CFO/CAO</Title>
      <DateSigned>2011-06-15</DateSigned>
    </Officer>
    <Preparer>
      <Name>Inger Sullenger CPA</Name>
      <Phone>5594317708</Phone>
      <SelfEmployed>X</SelfEmployed>
    </Preparer>
    <TaxYear>2009</TaxYear>
    <BuildTS>2016-02-24 21:20:13Z</BuildTS>
  </ReturnHeader>
  <ReturnData documentCount="8">
    <IRS990 documentId="IRS990" referenceDocumentId=" IRS990ScheduleO" softwareId="09000047" softwareVersion="2009v1.7">
      <AddressChange>X</AddressChange>
      <AmendedReturn>X</AmendedReturn>
      <NameOfPrincipalOfficerPerson>Phyllis Carter</NameOfPrincipalOfficerPerson>
      <GrossReceipts>3121835</GrossReceipts>
      <GroupReturnForAffiliates>false</GroupReturnForAffiliates>
      <AllAffiliatesIncluded>false</AllAffiliatesIncluded>
      <Organization501c typeOf501cOrganization="3">X</Organization501c>
      <WebSite>www.msri.org</WebSite>
      <TypeOfOrganizationCorporation>X</TypeOfOrganizationCorporation>
      <YearFormation>1980</YearFormation>
      <StateLegalDomicile>CA</StateLegalDomicile>
      <ActivityOrMissionDescription>MSRI fosters mathematical research by bringing together the foremost mathematical scientists from around the world in an environment that promotes creative and effective collaboration.</ActivityOrMissionDescription>
      <NbrVotingMembersGoverningBody>36</NbrVotingMembersGoverningBody>
      <NbrIndependentVotingMembers>36</NbrIndependentVotingMembers>
      <TotalNbrEmployees>29</TotalNbrEmployees>
      <TotalNbrVolunteers>70</TotalNbrVolunteers>
      <TotalGrossUBI>0</TotalGrossUBI>
      <ContributionsGrantsPriorYear>3563559</ContributionsGrantsPriorYear>
      <ContributionsGrantsCurrentYear>2668794</ContributionsGrantsCurrentYear>
      <ProgramServiceRevenuePriorYear>405146</ProgramServiceRevenuePriorYear>
      <ProgramServiceRevenueCY>369017</ProgramServiceRevenueCY>
      <InvestmentIncomePriorYear>112726</InvestmentIncomePriorYear>
      <InvestmentIncomeCurrentYear>79164</InvestmentIncomeCurrentYear>
      <OtherRevenueCurrentYear>4860</OtherRevenueCurrentYear>
      <TotalRevenuePriorYear>4081431</TotalRevenuePriorYear>
      <TotalRevenueCurrentYear>3121835</TotalRevenueCurrentYear>
      <GrantsAndSimilarAmntsPriorYear>1758874</GrantsAndSimilarAmntsPriorYear>
      <GrantsAndSimilarAmntsCY>2841458</GrantsAndSimilarAmntsCY>
      <BenefitsPaidToMembersCY>0</BenefitsPaidToMembersCY>
      <SalariesEtcPriorYear>1933283</SalariesEtcPriorYear>
      <SalariesEtcCurrentYear>1991231</SalariesEtcCurrentYear>
      <TotalProfFundrsngExpCY>0</TotalProfFundrsngExpCY>
      <TotalFundrsngExpCurrentYear>431759</TotalFundrsngExpCurrentYear>
      <OtherExpensePriorYear>3485434</OtherExpensePriorYear>
      <OtherExpensesCurrentYear>2587110</OtherExpensesCurrentYear>
      <TotalExpensesPriorYear>7177591</TotalExpensesPriorYear>
      <TotalExpensesCurrentYear>7419799</TotalExpensesCurrentYear>
      <RevenuesLessExpensesPriorYear>-3096160</RevenuesLessExpensesPriorYear>
      <RevenuesLessExpensesCY>-4297964</RevenuesLessExpensesCY>
      <TotalAssetsBOY>28584768</TotalAssetsBOY>
      <TotalAssetsEOY>24272636</TotalAssetsEOY>
      <TotalLiabilitiesBOY>140797</TotalLiabilitiesBOY>
      <TotalLiabilitiesEOY>152944</TotalLiabilitiesEOY>
      <NetAssetsOrFundBalancesBOY>28443971</NetAssetsOrFundBalancesBOY>
      <NetAssetsOrFundBalancesEOY>24119692</NetAssetsOrFundBalancesEOY>
      <MissionDescription>MSRI fosters mathematical research by bringing together the foremost mathematical scientists from around the world in an environment that promotes creative and effective collaboration.</MissionDescription>
      <SignificantNewProgramServices>false</SignificantNewProgramServices>
      <SignificantChange>false</SignificantChange>
      <Expense>5399767</Expense>
      <Grants>2841458</Grants>
      <Revenue>369017</Revenue>
      <Description>The Mathematical Sciences Research Institute (MSRI) exists to further mathematical research through broadly-based programs in the mathematical sciences and closely related fields. The major programs were:1) Semester entitled: Tropical Geometry2) Semester entitled: Sympletic and Contact Geometry and Topology3) Semester entitled: Homology Theory of Knots and LinksMSRI hosts mathematics scholars from all over the world to conduct research in their respective fields. In addition, MSRI holds workshops and conferences to discuss and disseminate mathematical research.</Description>
      <TotalProgramServiceExpense>5399767</TotalProgramServiceExpense>
      <DescribedIn501C3 referenceDocumentId=" IRS990ScheduleA">true</DescribedIn501C3>
      <ScheduleBRequired referenceDocumentId=" IRS990ScheduleB">true</ScheduleBRequired>
      <PoliticalActivities>false</PoliticalActivities>
      <LobbyingActivities>false</LobbyingActivities>
      <SubjectToProxyTax>false</SubjectToProxyTax>
      <DonorAdvisedFunds referenceDocumentId=" IRS990ScheduleD">false</DonorAdvisedFunds>
      <ConservationEasements referenceDocumentId=" IRS990ScheduleD">false</ConservationEasements>
      <CollectionsOfArt referenceDocumentId=" IRS990ScheduleD">false</CollectionsOfArt>
      <CreditCounseling referenceDocumentId=" IRS990ScheduleD">false</CreditCounseling>
      <TermOrPermanentEndowments referenceDocumentId=" IRS990ScheduleD">true</TermOrPermanentEndowments>
      <BalanceSheetAmountsReported referenceDocumentId=" IRS990ScheduleD">true</BalanceSheetAmountsReported>
      <IndependentAuditFinancialStmt referenceDocumentId=" IRS990ScheduleD">true</IndependentAuditFinancialStmt>
      <ConsolidatedAuditFinancialStmt referenceDocumentId=" IRS990ScheduleD">false</ConsolidatedAuditFinancialStmt>
      <School>false</School>
      <ForeignOffice>false</ForeignOffice>
      <ForeignActivities referenceDocumentId=" IRS990ScheduleF">false</ForeignActivities>
      <MoreThan5000KToOrganizations referenceDocumentId=" IRS990ScheduleF">false</MoreThan5000KToOrganizations>
      <MoreThan5000KToIndividuals referenceDocumentId=" IRS990ScheduleF">true</MoreThan5000KToIndividuals>
      <ProfessionalFundraising>false</ProfessionalFundraising>
      <FundraisingActivities>false</FundraisingActivities>
      <Gaming>false</Gaming>
      <Hospital>false</Hospital>
      <GrantsToOrganizations referenceDocumentId=" IRS990ScheduleI">true</GrantsToOrganizations>
      <GrantsToIndividuals referenceDocumentId=" IRS990ScheduleI">true</GrantsToIndividuals>
      <ScheduleJRequired referenceDocumentId=" IRS990ScheduleJ">true</ScheduleJRequired>
      <TaxExemptBonds>false</TaxExemptBonds>
      <InvestTaxExemptBonds>false</InvestTaxExemptBonds>
      <EscrowAccount>false</EscrowAccount>
      <OnBehalfOfIssuer>false</OnBehalfOfIssuer>
      <ExcessBenefitTransaction>false</ExcessBenefitTransaction>
      <PriorExcessBenefitTransaction>false</PriorExcessBenefitTransaction>
      <LoanToOfficerOrDQP>false</LoanToOfficerOrDQP>
      <GrantToRelatedPerson>false</GrantToRelatedPerson>
      <BsnssRltnshpWithOrganization>false</BsnssRltnshpWithOrganization>
      <BsnssRltnshpThruFamilyMember>false</BsnssRltnshpThruFamilyMember>
      <OfficerEntityWithBsnssRltnshp>false</OfficerEntityWithBsnssRltnshp>
      <DeductibleNonCashContributions>false</DeductibleNonCashContributions>
      <DeductibleContributionsOfArt>false</DeductibleContributionsOfArt>
      <Terminated>false</Terminated>
      <PartialLiquidation>false</PartialLiquidation>
      <DisregardedEntity>false</DisregardedEntity>
      <RelatedEntity>false</RelatedEntity>
      <RelatedOrgControlledEntity>false</RelatedOrgControlledEntity>
      <TransfersToExemptNonChrtblOrg>false</TransfersToExemptNonChrtblOrg>
      <ActivitiesConductedPartnership>false</ActivitiesConductedPartnership>
      <ScheduleORequired>true</ScheduleORequired>
      <NumberFormsTransmittedWith1096>86</NumberFormsTransmittedWith1096>
      <NumberW2GIncluded>0</NumberW2GIncluded>
      <ComplianceWithBackupWitholding>true</ComplianceWithBackupWitholding>
      <NumberOfEmployees>29</NumberOfEmployees>
      <EmploymentTaxReturnsFiled>true</EmploymentTaxReturnsFiled>
      <UnrelatedBusinessIncome>false</UnrelatedBusinessIncome>
      <Form990-TFiled>false</Form990-TFiled>
      <ForeignFinancialAccount>false</ForeignFinancialAccount>
      <ProhibitedTaxShelterTrans>false</ProhibitedTaxShelterTrans>
      <TaxablePartyNotification>false</TaxablePartyNotification>
      <Form8886TFiled>false</Form8886TFiled>
      <NonDeductibleContributions>false</NonDeductibleContributions>
      <NonDeductibleDisclosure>false</NonDeductibleDisclosure>
      <QuidProQuoContributions>false</QuidProQuoContributions>
      <QuidProQuoDisclosure>false</QuidProQuoDisclosure>
      <Form8282PropertyDisposedOf>false</Form8282PropertyDisposedOf>
      <NumberOf8282Filed>0</NumberOf8282Filed>
      <FundsToPayPremiums>false</FundsToPayPremiums>
      <PremiumsPaid>false</PremiumsPaid>
      <Form8899Filed>false</Form8899Filed>
      <Form1098CFiled>false</Form1098CFiled>
      <ExcessBusinessHoldings>false</ExcessBusinessHoldings>
      <TaxableDistributions>false</TaxableDistributions>
      <DistributionToDonor>false</DistributionToDonor>
      <FiledLieu1041>false</FiledLieu1041>
      <NbrVotingGoverningBodyMembers>36</NbrVotingGoverningBodyMembers>
      <NumberIndependentVotingMembers>36</NumberIndependentVotingMembers>
      <FamilyOrBusinessRelationship>true</FamilyOrBusinessRelationship>
      <DelegationOfManagementDuties>false</DelegationOfManagementDuties>
      <ChangesToOrganizingDocs>false</ChangesToOrganizingDocs>
      <MaterialDiversionOrMisuse>false</MaterialDiversionOrMisuse>
      <MembersOrStockholders>false</MembersOrStockholders>
      <ElectionOfBoardMembers>false</ElectionOfBoardMembers>
      <DecisionsSubjectToApproval>false</DecisionsSubjectToApproval>
      <MinutesOfGoverningBody>true</MinutesOfGoverningBody>
      <MinutesOfCommittees>true</MinutesOfCommittees>
      <OfficerMailingAddress>false</OfficerMailingAddress>
      <LocalChapters>false</LocalChapters>
      <PoliciesReferenceChapters>false</PoliciesReferenceChapters>
      <Form990ProvidedToGoverningBody>true</Form990ProvidedToGoverningBody>
      <ConflictOfInterestPolicy>true</ConflictOfInterestPolicy>
      <AnnualDisclosureCoveredPersons>true</AnnualDisclosureCoveredPersons>
      <RegularMonitoringEnforcement>true</RegularMonitoringEnforcement>
      <WhistleblowerPolicy>true</WhistleblowerPolicy>
      <DocumentRetentionPolicy>true</DocumentRetentionPolicy>
      <CompensationProcessCEO>true</CompensationProcessCEO>
      <CompensationProcessOther>true</CompensationProcessOther>
      <InvestmentInJointVenture>false</InvestmentInJointVenture>
      <WrittenPolicyOrProcedure>false</WrittenPolicyOrProcedure>
      <StatesWhereCopyOfReturnIsFiled>WV</StatesWhereCopyOfReturnIsFiled>
      <StatesWhereCopyOfReturnIsFiled>WI</StatesWhereCopyOfReturnIsFiled>
      <StatesWhereCopyOfReturnIsFiled>WA</StatesWhereCopyOfReturnIsFiled>
      <StatesWhereCopyOfReturnIsFiled>VA</StatesWhereCopyOfReturnIsFiled>
      <StatesWhereCopyOfReturnIsFiled>UT</StatesWhereCopyOfReturnIsFiled>
      <StatesWhereCopyOfReturnIsFiled>TN</StatesWhereCopyOfReturnIsFiled>
      <StatesWhereCopyOfReturnIsFiled>SC</StatesWhereCopyOfReturnIsFiled>
      <StatesWhereCopyOfReturnIsFiled>RI</StatesWhereCopyOfReturnIsFiled>
      <StatesWhereCopyOfReturnIsFiled>PA</StatesWhereCopyOfReturnIsFiled>
      <StatesWhereCopyOfReturnIsFiled>OR</StatesWhereCopyOfReturnIsFiled>
      <StatesWhereCopyOfReturnIsFiled>OK</StatesWhereCopyOfReturnIsFiled>
      <StatesWhereCopyOfReturnIsFiled>OH</StatesWhereCopyOfReturnIsFiled>
      <StatesWhereCopyOfReturnIsFiled>NY</StatesWhereCopyOfReturnIsFiled>
      <StatesWhereCopyOfReturnIsFiled>NM</StatesWhereCopyOfReturnIsFiled>
      <StatesWhereCopyOfReturnIsFiled>NJ</StatesWhereCopyOfReturnIsFiled>
      <StatesWhereCopyOfReturnIsFiled>NH</StatesWhereCopyOfReturnIsFiled>
      <StatesWhereCopyOfReturnIsFiled>ND</StatesWhereCopyOfReturnIsFiled>
      <StatesWhereCopyOfReturnIsFiled>NC</StatesWhereCopyOfReturnIsFiled>
      <StatesWhereCopyOfReturnIsFiled>MS</StatesWhereCopyOfReturnIsFiled>
      <StatesWhereCopyOfReturnIsFiled>MN</StatesWhereCopyOfReturnIsFiled>
      <StatesWhereCopyOfReturnIsFiled>MI</StatesWhereCopyOfReturnIsFiled>
      <StatesWhereCopyOfReturnIsFiled>ME</StatesWhereCopyOfReturnIsFiled>
      <StatesWhereCopyOfReturnIsFiled>MD</StatesWhereCopyOfReturnIsFiled>
      <StatesWhereCopyOfReturnIsFiled>MA</StatesWhereCopyOfReturnIsFiled>
      <StatesWhereCopyOfReturnIsFiled>KY</StatesWhereCopyOfReturnIsFiled>
      <StatesWhereCopyOfReturnIsFiled>KS</StatesWhereCopyOfReturnIsFiled>
      <StatesWhereCopyOfReturnIsFiled>IL</StatesWhereCopyOfReturnIsFiled>
      <StatesWhereCopyOfReturnIsFiled>GA</StatesWhereCopyOfReturnIsFiled>
      <StatesWhereCopyOfReturnIsFiled>FL</StatesWhereCopyOfReturnIsFiled>
      <StatesWhereCopyOfReturnIsFiled>CT</StatesWhereCopyOfReturnIsFiled>
      <StatesWhereCopyOfReturnIsFiled>CA</StatesWhereCopyOfReturnIsFiled>
      <StatesWhereCopyOfReturnIsFiled>AZ</StatesWhereCopyOfReturnIsFiled>
      <StatesWhereCopyOfReturnIsFiled>AR</StatesWhereCopyOfReturnIsFiled>
      <StatesWhereCopyOfReturnIsFiled>AL</StatesWhereCopyOfReturnIsFiled>
      <StatesWhereCopyOfReturnIsFiled>AK</StatesWhereCopyOfReturnIsFiled>
      <OtherWebsite>X</OtherWebsite>
      <UponRequest>X</UponRequest>
      <TheBooksAreInCareOf>
        <NamePerson>Phyllis Carter</NamePerson>
        <TelephoneNumber>5106438321</TelephoneNumber>
        <AddressUS>
          <AddressLine1>17 Gauss Way</AddressLine1>
          <City>Berkeley</City>
          <State>CA</State>
          <ZIPCode>947205070</ZIPCode>
        </AddressUS>
      </TheBooksAreInCareOf>
      <Form990PartVIISectionA>
        <NamePerson>William Hearst III</NamePerson>
        <Title>Trustee</Title>
        <AverageHoursPerWeek>1.00</AverageHoursPerWeek>
        <IndividualTrusteeOrDirector>X</IndividualTrusteeOrDirector>
        <ReportableCompFromOrganization>0</ReportableCompFromOrganization>
        <ReportableCompFromRelatedOrgs>0</ReportableCompFromRelatedOrgs>
        <OtherCompensation>0</OtherCompensation>
      </Form990PartVIISectionA>
      <Form990PartVIISectionA>
        <NamePerson>Tom Leighton</NamePerson>
        <Title>Secretary</Title>
        <AverageHoursPerWeek>1.00</AverageHoursPerWeek>
        <IndividualTrusteeOrDirector>X</IndividualTrusteeOrDirector>
        <ReportableCompFromOrganization>0</ReportableCompFromOrganization>
        <ReportableCompFromRelatedOrgs>0</ReportableCompFromRelatedOrgs>
        <OtherCompensation>0</OtherCompensation>
      </Form990PartVIISectionA>
      <Form990PartVIISectionA>
        <NamePerson>Sylvia Bozeman</NamePerson>
        <Title>Ex-Off Trustee</Title>
        <AverageHoursPerWeek>1.00</AverageHoursPerWeek>
        <IndividualTrusteeOrDirector>X</IndividualTrusteeOrDirector>
        <ReportableCompFromOrganization>0</ReportableCompFromOrganization>
        <ReportableCompFromRelatedOrgs>0</ReportableCompFromRelatedOrgs>
        <OtherCompensation>0</OtherCompensation>
      </Form990PartVIISectionA>
      <Form990PartVIISectionA>
        <NamePerson>Sun-Yung Alice Chang</NamePerson>
        <Title>Trustee</Title>
        <AverageHoursPerWeek>1.00</AverageHoursPerWeek>
        <IndividualTrusteeOrDirector>X</IndividualTrusteeOrDirector>
        <ReportableCompFromOrganization>0</ReportableCompFromOrganization>
        <ReportableCompFromRelatedOrgs>0</ReportableCompFromRelatedOrgs>
        <OtherCompensation>0</OtherCompensation>
      </Form990PartVIISectionA>
      <Form990PartVIISectionA>
        <NamePerson>Sanford Grossman</NamePerson>
        <Title>Trustee</Title>
        <AverageHoursPerWeek>1.00</AverageHoursPerWeek>
        <IndividualTrusteeOrDirector>X</IndividualTrusteeOrDirector>
        <ReportableCompFromOrganization>0</ReportableCompFromOrganization>
        <ReportableCompFromRelatedOrgs>0</ReportableCompFromRelatedOrgs>
        <OtherCompensation>0</OtherCompensation>
      </Form990PartVIISectionA>
      <Form990PartVIISectionA>
        <NamePerson>Sandor Straus</NamePerson>
        <Title>Trustee</Title>
        <AverageHoursPerWeek>1.00</AverageHoursPerWeek>
        <IndividualTrusteeOrDirector>X</IndividualTrusteeOrDirector>
        <ReportableCompFromOrganization>0</ReportableCompFromOrganization>
        <ReportableCompFromRelatedOrgs>0</ReportableCompFromRelatedOrgs>
        <OtherCompensation>0</OtherCompensation>
      </Form990PartVIISectionA>
      <Form990PartVIISectionA>
        <NamePerson>Ruth Charney</NamePerson>
        <Title>Trustee</Title>
        <AverageHoursPerWeek>1.00</AverageHoursPerWeek>
        <IndividualTrusteeOrDirector>X</IndividualTrusteeOrDirector>
        <ReportableCompFromOrganization>0</ReportableCompFromOrganization>
        <ReportableCompFromRelatedOrgs>0</ReportableCompFromRelatedOrgs>
        <OtherCompensation>0</OtherCompensation>
      </Form990PartVIISectionA>
      <Form990PartVIISectionA>
        <NamePerson>Roger Strauch</NamePerson>
        <Title>Trustee</Title>
        <AverageHoursPerWeek>1.00</AverageHoursPerWeek>
        <IndividualTrusteeOrDirector>X</IndividualTrusteeOrDirector>
        <ReportableCompFromOrganization>0</ReportableCompFromOrganization>
        <ReportableCompFromRelatedOrgs>0</ReportableCompFromRelatedOrgs>
        <OtherCompensation>0</OtherCompensation>
      </Form990PartVIISectionA>
      <Form990PartVIISectionA>
        <NamePerson>Robert Bryant</NamePerson>
        <Title>Director</Title>
        <AverageHoursPerWeek>40.00</AverageHoursPerWeek>
        <Officer>X</Officer>
        <ReportableCompFromOrganization>85360</ReportableCompFromOrganization>
        <ReportableCompFromRelatedOrgs>0</ReportableCompFromRelatedOrgs>
        <OtherCompensation>8536</OtherCompensation>
      </Form990PartVIISectionA>
      <Form990PartVIISectionA>
        <NamePerson>Rick Schoen</NamePerson>
        <Title>Ex-Off Trustee</Title>
        <AverageHoursPerWeek>1.00</AverageHoursPerWeek>
        <IndividualTrusteeOrDirector>X</IndividualTrusteeOrDirector>
        <ReportableCompFromOrganization>0</ReportableCompFromOrganization>
        <ReportableCompFromRelatedOrgs>0</ReportableCompFromRelatedOrgs>
        <OtherCompensation>0</OtherCompensation>
      </Form990PartVIISectionA>
      <Form990PartVIISectionA>
        <NamePerson>Ricardo Cortez</NamePerson>
        <Title>Ex-Off Trustee</Title>
        <AverageHoursPerWeek>1.00</AverageHoursPerWeek>
        <IndividualTrusteeOrDirector>X</IndividualTrusteeOrDirector>
        <ReportableCompFromOrganization>0</ReportableCompFromOrganization>
        <ReportableCompFromRelatedOrgs>0</ReportableCompFromRelatedOrgs>
        <OtherCompensation>0</OtherCompensation>
      </Form990PartVIISectionA>
      <Form990PartVIISectionA>
        <NamePerson>Phillip Griffiths</NamePerson>
        <Title>Trustee</Title>
        <AverageHoursPerWeek>1.00</AverageHoursPerWeek>
        <IndividualTrusteeOrDirector>X</IndividualTrusteeOrDirector>
        <ReportableCompFromOrganization>0</ReportableCompFromOrganization>
        <ReportableCompFromRelatedOrgs>0</ReportableCompFromRelatedOrgs>
        <OtherCompensation>0</OtherCompensation>
      </Form990PartVIISectionA>
      <Form990PartVIISectionA>
        <NamePerson>Phabhakar Raghavan</NamePerson>
        <Title>Trustee</Title>
        <AverageHoursPerWeek>1.00</AverageHoursPerWeek>
        <IndividualTrusteeOrDirector>X</IndividualTrusteeOrDirector>
        <ReportableCompFromOrganization>0</ReportableCompFromOrganization>
        <ReportableCompFromRelatedOrgs>0</ReportableCompFromRelatedOrgs>
        <OtherCompensation>0</OtherCompensation>
      </Form990PartVIISectionA>
      <Form990PartVIISectionA>
        <NamePerson>Peter Sarnak</NamePerson>
        <Title>Trustee</Title>
        <AverageHoursPerWeek>1.00</AverageHoursPerWeek>
        <IndividualTrusteeOrDirector>X</IndividualTrusteeOrDirector>
        <ReportableCompFromOrganization>0</ReportableCompFromOrganization>
        <ReportableCompFromRelatedOrgs>0</ReportableCompFromRelatedOrgs>
        <OtherCompensation>0</OtherCompensation>
      </Form990PartVIISectionA>
      <Form990PartVIISectionA>
        <NamePerson>Nathaniel Simons</NamePerson>
        <Title>Trustee</Title>
        <AverageHoursPerWeek>1.00</AverageHoursPerWeek>
        <IndividualTrusteeOrDirector>X</IndividualTrusteeOrDirector>
        <ReportableCompFromOrganization>0</ReportableCompFromOrganization>
        <ReportableCompFromRelatedOrgs>0</ReportableCompFromRelatedOrgs>
        <OtherCompensation>0</OtherCompensation>
      </Form990PartVIISectionA>
      <Form990PartVIISectionA>
        <NamePerson>Myron Scholes</NamePerson>
        <Title>Trustee</Title>
        <AverageHoursPerWeek>1.00</AverageHoursPerWeek>
        <IndividualTrusteeOrDirector>X</IndividualTrusteeOrDirector>
        <ReportableCompFromOrganization>0</ReportableCompFromOrganization>
        <ReportableCompFromRelatedOrgs>0</ReportableCompFromRelatedOrgs>
        <OtherCompensation>0</OtherCompensation>
      </Form990PartVIISectionA>
      <Form990PartVIISectionA>
        <NamePerson>Morris Kalka</NamePerson>
        <Title>Ex-Off Trustee</Title>
        <AverageHoursPerWeek>1.00</AverageHoursPerWeek>
        <IndividualTrusteeOrDirector>X</IndividualTrusteeOrDirector>
        <ReportableCompFromOrganization>0</ReportableCompFromOrganization>
        <ReportableCompFromRelatedOrgs>0</ReportableCompFromRelatedOrgs>
        <OtherCompensation>0</OtherCompensation>
      </Form990PartVIISectionA>
      <Form990PartVIISectionA>
        <NamePerson>May Chu</NamePerson>
        <Title>Trustee</Title>
        <AverageHoursPerWeek>1.00</AverageHoursPerWeek>
        <IndividualTrusteeOrDirector>X</IndividualTrusteeOrDirector>
        <ReportableCompFromOrganization>0</ReportableCompFromOrganization>
        <ReportableCompFromRelatedOrgs>0</ReportableCompFromRelatedOrgs>
        <OtherCompensation>0</OtherCompensation>
      </Form990PartVIISectionA>
      <Form990PartVIISectionA>
        <NamePerson>Maria Klawe</NamePerson>
        <Title>Trustee</Title>
        <AverageHoursPerWeek>1.00</AverageHoursPerWeek>
        <IndividualTrusteeOrDirector>X</IndividualTrusteeOrDirector>
        <ReportableCompFromOrganization>0</ReportableCompFromOrganization>
        <ReportableCompFromRelatedOrgs>0</ReportableCompFromRelatedOrgs>
        <OtherCompensation>0</OtherCompensation>
      </Form990PartVIISectionA>
      <Form990PartVIISectionA>
        <NamePerson>Lucy Sanders</NamePerson>
        <Title>Trustee</Title>
        <AverageHoursPerWeek>1.00</AverageHoursPerWeek>
        <IndividualTrusteeOrDirector>X</IndividualTrusteeOrDirector>
        <ReportableCompFromOrganization>0</ReportableCompFromOrganization>
        <ReportableCompFromRelatedOrgs>0</ReportableCompFromRelatedOrgs>
        <OtherCompensation>0</OtherCompensation>
      </Form990PartVIISectionA>
      <Form990PartVIISectionA>
        <NamePerson>Kathleen O'Hara</NamePerson>
        <Title>Ex-Off Trustee</Title>
        <AverageHoursPerWeek>1.00</AverageHoursPerWeek>
        <IndividualTrusteeOrDirector>X</IndividualTrusteeOrDirector>
        <ReportableCompFromOrganization>0</ReportableCompFromOrganization>
        <ReportableCompFromRelatedOrgs>0</ReportableCompFromRelatedOrgs>
        <OtherCompensation>0</OtherCompensation>
      </Form990PartVIISectionA>
      <Form990PartVIISectionA>
        <NamePerson>Julius Krevans</NamePerson>
        <Title>Vice-Chair</Title>
        <AverageHoursPerWeek>1.00</AverageHoursPerWeek>
        <IndividualTrusteeOrDirector>X</IndividualTrusteeOrDirector>
        <ReportableCompFromOrganization>0</ReportableCompFromOrganization>
        <ReportableCompFromRelatedOrgs>0</ReportableCompFromRelatedOrgs>
        <OtherCompensation>0</OtherCompensation>
      </Form990PartVIISectionA>
      <Form990PartVIISectionA>
        <NamePerson>Jim Sotoris</NamePerson>
        <Title>Development</Title>
        <AverageHoursPerWeek>40.00</AverageHoursPerWeek>
        <Officer>X</Officer>
        <ReportableCompFromOrganization>119927</ReportableCompFromOrganization>
        <ReportableCompFromRelatedOrgs>0</ReportableCompFromRelatedOrgs>
        <OtherCompensation>20799</OtherCompensation>
      </Form990PartVIISectionA>
      <Form990PartVIISectionA>
        <NamePerson>Jerry Fiddler</NamePerson>
        <Title>Trustee</Title>
        <AverageHoursPerWeek>1.00</AverageHoursPerWeek>
        <IndividualTrusteeOrDirector>X</IndividualTrusteeOrDirector>
        <ReportableCompFromOrganization>0</ReportableCompFromOrganization>
        <ReportableCompFromRelatedOrgs>0</ReportableCompFromRelatedOrgs>
        <OtherCompensation>0</OtherCompensation>
      </Form990PartVIISectionA>
      <Form990PartVIISectionA>
        <NamePerson>Jennifer Chayes</NamePerson>
        <Title>Trustee</Title>
        <AverageHoursPerWeek>1.00</AverageHoursPerWeek>
        <IndividualTrusteeOrDirector>X</IndividualTrusteeOrDirector>
        <ReportableCompFromOrganization>0</ReportableCompFromOrganization>
        <ReportableCompFromRelatedOrgs>0</ReportableCompFromRelatedOrgs>
        <OtherCompensation>0</OtherCompensation>
      </Form990PartVIISectionA>
      <Form990PartVIISectionA>
        <NamePerson>Jeff Goodby</NamePerson>
        <Title>Trustee</Title>
        <AverageHoursPerWeek>1.00</AverageHoursPerWeek>
        <IndividualTrusteeOrDirector>X</IndividualTrusteeOrDirector>
        <ReportableCompFromOrganization>0</ReportableCompFromOrganization>
        <ReportableCompFromRelatedOrgs>0</ReportableCompFromRelatedOrgs>
        <OtherCompensation>0</OtherCompensation>
      </Form990PartVIISectionA>
      <Form990PartVIISectionA>
        <NamePerson>James Simons</NamePerson>
        <Title>Trustee</Title>
        <AverageHoursPerWeek>1.00</AverageHoursPerWeek>
        <IndividualTrusteeOrDirector>X</IndividualTrusteeOrDirector>
        <ReportableCompFromOrganization>0</ReportableCompFromOrganization>
        <ReportableCompFromRelatedOrgs>0</ReportableCompFromRelatedOrgs>
        <OtherCompensation>0</OtherCompensation>
      </Form990PartVIISectionA>
      <Form990PartVIISectionA>
        <NamePerson>Hugo Sonnenschein</NamePerson>
        <Title>Trustee</Title>
        <AverageHoursPerWeek>1.00</AverageHoursPerWeek>
        <IndividualTrusteeOrDirector>X</IndividualTrusteeOrDirector>
        <ReportableCompFromOrganization>0</ReportableCompFromOrganization>
        <ReportableCompFromRelatedOrgs>0</ReportableCompFromRelatedOrgs>
        <OtherCompensation>0</OtherCompensation>
      </Form990PartVIISectionA>
      <Form990PartVIISectionA>
        <NamePerson>Helmut Hofer</NamePerson>
        <Title>Ex-Off Trustee</Title>
        <AverageHoursPerWeek>1.00</AverageHoursPerWeek>
        <IndividualTrusteeOrDirector>X</IndividualTrusteeOrDirector>
        <ReportableCompFromOrganization>0</ReportableCompFromOrganization>
        <ReportableCompFromRelatedOrgs>0</ReportableCompFromRelatedOrgs>
        <OtherCompensation>0</OtherCompensation>
      </Form990PartVIISectionA>
      <Form990PartVIISectionA>
        <NamePerson>Helene Barcelo</NamePerson>
        <Title>Deputy Director</Title>
        <AverageHoursPerWeek>40.00</AverageHoursPerWeek>
        <Officer>X</Officer>
        <ReportableCompFromOrganization>153850</ReportableCompFromOrganization>
        <ReportableCompFromRelatedOrgs>0</ReportableCompFromRelatedOrgs>
        <OtherCompensation>24964</OtherCompensation>
      </Form990PartVIISectionA>
      <Form990PartVIISectionA>
        <NamePerson>Enrico Hernandez</NamePerson>
        <Title>CFO/COA</Title>
        <AverageHoursPerWeek>40.00</AverageHoursPerWeek>
        <Officer>X</Officer>
        <ReportableCompFromOrganization>107158</ReportableCompFromOrganization>
        <ReportableCompFromRelatedOrgs>0</ReportableCompFromRelatedOrgs>
        <OtherCompensation>16154</OtherCompensation>
      </Form990PartVIISectionA>
      <Form990PartVIISectionA>
        <NamePerson>Elwyn Berlekamp</NamePerson>
        <Title>Trustee</Title>
        <AverageHoursPerWeek>1.00</AverageHoursPerWeek>
        <IndividualTrusteeOrDirector>X</IndividualTrusteeOrDirector>
        <ReportableCompFromOrganization>0</ReportableCompFromOrganization>
        <ReportableCompFromRelatedOrgs>0</ReportableCompFromRelatedOrgs>
        <OtherCompensation>0</OtherCompensation>
      </Form990PartVIISectionA>
      <Form990PartVIISectionA>
        <NamePerson>Edward Baker</NamePerson>
        <Title>Trustee</Title>
        <AverageHoursPerWeek>1.00</AverageHoursPerWeek>
        <IndividualTrusteeOrDirector>X</IndividualTrusteeOrDirector>
        <ReportableCompFromOrganization>0</ReportableCompFromOrganization>
        <ReportableCompFromRelatedOrgs>0</ReportableCompFromRelatedOrgs>
        <OtherCompensation>0</OtherCompensation>
      </Form990PartVIISectionA>
      <Form990PartVIISectionA>
        <NamePerson>Dusa McDuff</NamePerson>
        <Title>Trustee</Title>
        <AverageHoursPerWeek>1.00</AverageHoursPerWeek>
        <IndividualTrusteeOrDirector>X</IndividualTrusteeOrDirector>
        <ReportableCompFromOrganization>0</ReportableCompFromOrganization>
        <ReportableCompFromRelatedOrgs>0</ReportableCompFromRelatedOrgs>
        <OtherCompensation>0</OtherCompensation>
      </Form990PartVIISectionA>
      <Form990PartVIISectionA>
        <NamePerson>Deborah Loewenberg Ball</NamePerson>
        <Title>Trustee</Title>
        <AverageHoursPerWeek>1.00</AverageHoursPerWeek>
        <IndividualTrusteeOrDirector>X</IndividualTrusteeOrDirector>
        <ReportableCompFromOrganization>0</ReportableCompFromOrganization>
        <ReportableCompFromRelatedOrgs>0</ReportableCompFromRelatedOrgs>
        <OtherCompensation>0</OtherCompensation>
      </Form990PartVIISectionA>
      <Form990PartVIISectionA>
        <NamePerson>David Eisenbud</NamePerson>
        <Title>Trustee</Title>
        <AverageHoursPerWeek>1.00</AverageHoursPerWeek>
        <IndividualTrusteeOrDirector>X</IndividualTrusteeOrDirector>
        <ReportableCompFromOrganization>0</ReportableCompFromOrganization>
        <ReportableCompFromRelatedOrgs>0</ReportableCompFromRelatedOrgs>
        <OtherCompensation>0</OtherCompensation>
      </Form990PartVIISectionA>
      <Form990PartVIISectionA>
        <NamePerson>David Auckly</NamePerson>
        <Title>Assoc Director</Title>
        <AverageHoursPerWeek>40.00</AverageHoursPerWeek>
        <Officer>X</Officer>
        <ReportableCompFromOrganization>134700</ReportableCompFromOrganization>
        <ReportableCompFromRelatedOrgs>0</ReportableCompFromRelatedOrgs>
        <OtherCompensation>15893</OtherCompensation>
      </Form990PartVIISectionA>
      <Form990PartVIISectionA>
        <NamePerson>Charles Fefferman</NamePerson>
        <Title>Chair</Title>
        <AverageHoursPerWeek>1.00</AverageHoursPerWeek>
        <IndividualTrusteeOrDirector>X</IndividualTrusteeOrDirector>
        <ReportableCompFromOrganization>0</ReportableCompFromOrganization>
        <ReportableCompFromRelatedOrgs>0</ReportableCompFromRelatedOrgs>
        <OtherCompensation>0</OtherCompensation>
      </Form990PartVIISectionA>
      <Form990PartVIISectionA>
        <NamePerson>Andrew Viterbi</NamePerson>
        <Title>Trustee</Title>
        <AverageHoursPerWeek>1.00</AverageHoursPerWeek>
        <IndividualTrusteeOrDirector>X</IndividualTrusteeOrDirector>
        <ReportableCompFromOrganization>0</ReportableCompFromOrganization>
        <ReportableCompFromRelatedOrgs>0</ReportableCompFromRelatedOrgs>
        <OtherCompensation>0</OtherCompensation>
      </Form990PartVIISectionA>
      <Form990PartVIISectionA>
        <NamePerson>Andrea Okounkov</NamePerson>
        <Title>Ex-Off Trustee</Title>
        <AverageHoursPerWeek>1.00</AverageHoursPerWeek>
        <IndividualTrusteeOrDirector>X</IndividualTrusteeOrDirector>
        <ReportableCompFromOrganization>0</ReportableCompFromOrganization>
        <ReportableCompFromRelatedOrgs>0</ReportableCompFromRelatedOrgs>
        <OtherCompensation>0</OtherCompensation>
      </Form990PartVIISectionA>
      <Form990PartVIISectionA>
        <NamePerson>Andrea Bertozzi</NamePerson>
        <Title>Trustee</Title>
        <AverageHoursPerWeek>1.00</AverageHoursPerWeek>
        <IndividualTrusteeOrDirector>X</IndividualTrusteeOrDirector>
        <ReportableCompFromOrganization>0</ReportableCompFromOrganization>
        <ReportableCompFromRelatedOrgs>0</ReportableCompFromRelatedOrgs>
        <OtherCompensation>0</OtherCompensation>
      </Form990PartVIISectionA>
      <TotalReportableCompFromOrg>600995</TotalReportableCompFromOrg>
      <TotalOtherCompensation>86346</TotalOtherCompensation>
      <NumberIndividualsGT100K>4</NumberIndividualsGT100K>
      <FormersListed>false</FormersListed>
      <TotalCompGT150K>true</TotalCompGT150K>
      <CompensationFromOtherSources>false</CompensationFromOtherSources>
      <NumberOfContractorsGT100K>0</NumberOfContractorsGT100K>
      <GovernmentGrants>570347</GovernmentGrants>
      <AllOtherContributions>2098447</AllOtherContributions>
      <TotalContributions>2668794</TotalContributions>
      <ProgramServiceRevenue>
        <Description>Academic Svc Fees &amp; Other</Description>
        <TotalRevenueColumn>369017</TotalRevenueColumn>
        <RelatedOrExemptFunctionIncome>369017</RelatedOrExemptFunctionIncome>
      </ProgramServiceRevenue>
      <TotalProgramServiceRevenue>369017</TotalProgramServiceRevenue>
      <InvestmentIncome>
        <TotalRevenueColumn>79164</TotalRevenueColumn>
        <ExclusionAmount>79164</ExclusionAmount>
      </InvestmentIncome>
      <IncomeFromInvestBondProceeds>
        <TotalRevenueColumn>0</TotalRevenueColumn>
      </IncomeFromInvestBondProceeds>
      <RoyaltiesRevenue>
        <TotalRevenueColumn>4860</TotalRevenueColumn>
        <ExclusionAmount>4860</ExclusionAmount>
      </RoyaltiesRevenue>
      <NetRentalIncomeOrLoss>
        <TotalRevenueColumn>0</TotalRevenueColumn>
      </NetRentalIncomeOrLoss>
      <NetGainOrLossInvestments>
        <TotalRevenueColumn>0</TotalRevenueColumn>
      </NetGainOrLossInvestments>
      <NetIncomeFromFundraisingEvents>
        <TotalRevenueColumn>0</TotalRevenueColumn>
      </NetIncomeFromFundraisingEvents>
      <NetIncomeFromGaming>
        <TotalRevenueColumn>0</TotalRevenueColumn>
      </NetIncomeFromGaming>
      <NetIncomeOrLoss>
        <TotalRevenueColumn>0</TotalRevenueColumn>
      </NetIncomeOrLoss>
      <TotalOtherRevenue>0</TotalOtherRevenue>
      <TotalRevenue>
        <TotalRevenueColumn>3121835</TotalRevenueColumn>
        <RelatedOrExemptFunctionIncome>369017</RelatedOrExemptFunctionIncome>
        <ExclusionAmount>84024</ExclusionAmount>
      </TotalRevenue>
      <GrantsToDomesticOrgs>
        <Total>10041</Total>
        <ProgramServices>10041</ProgramServices>
      </GrantsToDomesticOrgs>
      <GrantsToDomesticIndividuals>
        <Total>1428220</Total>
        <ProgramServices>1428220</ProgramServices>
      </GrantsToDomesticIndividuals>
      <ForeignGrants>
        <Total>1403197</Total>
        <ProgramServices>1403197</ProgramServices>
      </ForeignGrants>
      <BenefitsToMembers>
        <Total>0</Total>
      </BenefitsToMembers>
      <CompCurrentOfficersDirectors>
        <Total>373210</Total>
        <ManagementAndGeneral>352517</ManagementAndGeneral>
        <Fundraising>20693</Fundraising>
      </CompCurrentOfficersDirectors>
      <CompDisqualPersons>
        <Total>0</Total>
      </CompDisqualPersons>
      <OtherSalariesAndWages>
        <Total>1158027</Total>
        <ProgramServices>377245</ProgramServices>
        <ManagementAndGeneral>589038</ManagementAndGeneral>
        <Fundraising>191744</Fundraising>
      </OtherSalariesAndWages>
      <PensionPlanContributions>
        <Total>146998</Total>
        <ProgramServices>38452</ProgramServices>
        <ManagementAndGeneral>87823</ManagementAndGeneral>
        <Fundraising>20723</Fundraising>
      </PensionPlanContributions>
      <OtherEmployeeBenefits>
        <Total>191062</Total>
        <ProgramServices>53291</ProgramServices>
        <ManagementAndGeneral>112254</ManagementAndGeneral>
        <Fundraising>25517</Fundraising>
      </OtherEmployeeBenefits>
      <PayrollTaxes>
        <Total>121934</Total>
        <ProgramServices>38065</ProgramServices>
        <ManagementAndGeneral>68895</ManagementAndGeneral>
        <Fundraising>14974</Fundraising>
      </PayrollTaxes>
      <FeesForServicesManagement>
        <Total>0</Total>
      </FeesForServicesManagement>
      <FeesForServicesLegal>
        <Total>10867</Total>
        <ManagementAndGeneral>3354</ManagementAndGeneral>
        <Fundraising>7513</Fundraising>
      </FeesForServicesLegal>
      <FeesForServicesAccounting>
        <Total>34430</Total>
        <ManagementAndGeneral>34430</ManagementAndGeneral>
      </FeesForServicesAccounting>
      <FeesForServicesLobbying>
        <Total>0</Total>
      </FeesForServicesLobbying>
      <FeesForServicesProfFundraising>
        <Total>0</Total>
      </FeesForServicesProfFundraising>
      <FeesForServicesInvstMgmntFees>
        <Total>0</Total>
      </FeesForServicesInvstMgmntFees>
      <FeesForServicesOther>
        <Total>9596</Total>
        <ManagementAndGeneral>9596</ManagementAndGeneral>
      </FeesForServicesOther>
      <Advertising>
        <Total>0</Total>
      </Advertising>
      <OfficeExpenses>
        <Total>85469</Total>
        <ProgramServices>13051</ProgramServices>
        <ManagementAndGeneral>9949</ManagementAndGeneral>
        <Fundraising>62469</Fundraising>
      </OfficeExpenses>
      <InformationTechnology>
        <Total>0</Total>
      </InformationTechnology>
      <Royalties>
        <Total>0</Total>
      </Royalties>
      <Occupancy>
        <Total>0</Total>
      </Occupancy>
      <Travel>
        <Total>35695</Total>
        <ProgramServices>10716</ProgramServices>
        <ManagementAndGeneral>13783</ManagementAndGeneral>
        <Fundraising>11196</Fundraising>
      </Travel>
      <TravelEntrtnmntPublicOfficials>
        <Total>0</Total>
      </TravelEntrtnmntPublicOfficials>
      <ConferencesMeetings>
        <Total>399730</Total>
        <ProgramServices>399730</ProgramServices>
      </ConferencesMeetings>
      <Interest>
        <Total>0</Total>
      </Interest>
      <PaymentsToAffiliates>
        <Total>0</Total>
      </PaymentsToAffiliates>
      <DepreciationDepletion>
        <Total>584568</Total>
        <ProgramServices>514420</ProgramServices>
        <ManagementAndGeneral>64302</ManagementAndGeneral>
        <Fundraising>5846</Fundraising>
      </DepreciationDepletion>
      <Insurance>
        <Total>26193</Total>
        <ProgramServices>22855</ProgramServices>
        <ManagementAndGeneral>3059</ManagementAndGeneral>
        <Fundraising>279</Fundraising>
      </Insurance>
      <OtherExpenses>
        <Description>Purchased Services</Description>
        <Total>304674</Total>
        <ProgramServices>141036</ProgramServices>
        <ManagementAndGeneral>111892</ManagementAndGeneral>
        <Fundraising>51746</Fundraising>
      </OtherExpenses>
      <OtherExpenses>
        <Description>Math &amp; Society - Outreach</Description>
        <Total>504512</Total>
        <ProgramServices>504512</ProgramServices>
      </OtherExpenses>
      <OtherExpenses>
        <Description>Equipment &amp; Furn Repairs</Description>
        <Total>187214</Total>
        <ProgramServices>147578</ProgramServices>
        <ManagementAndGeneral>25273</ManagementAndGeneral>
        <Fundraising>14363</Fundraising>
      </OtherExpenses>
      <OtherExpenses>
        <Description>Building Lease &amp; Maintenance</Description>
        <Total>119409</Total>
        <ProgramServices>103646</ProgramServices>
        <ManagementAndGeneral>14450</ManagementAndGeneral>
        <Fundraising>1313</Fundraising>
      </OtherExpenses>
      <OtherExpenses>
        <Description>Benefits - Scientists</Description>
        <Total>125483</Total>
        <ProgramServices>125483</ProgramServices>
      </OtherExpenses>
      <AllOtherExpenses>
        <Total>159270</Total>
        <ProgramServices>68229</ProgramServices>
        <ManagementAndGeneral>87658</ManagementAndGeneral>
        <Fundraising>3383</Fundraising>
      </AllOtherExpenses>
      <TotalFunctionalExpenses>
        <Total>7419799</Total>
        <ProgramServices>5399767</ProgramServices>
        <ManagementAndGeneral>1588273</ManagementAndGeneral>
        <Fundraising>431759</Fundraising>
      </TotalFunctionalExpenses>
      <CashNonInterestBearing>
        <BOY>511</BOY>
        <EOY>321615</EOY>
      </CashNonInterestBearing>
      <SavingsAndTempCashInvestments>
        <BOY>29767</BOY>
        <EOY>1523725</EOY>
      </SavingsAndTempCashInvestments>
      <PledgesAndGrantsReceivable>
        <BOY>8070048</BOY>
        <EOY>2420721</EOY>
      </PledgesAndGrantsReceivable>
      <AccountsReceivable>
        <BOY>42216</BOY>
        <EOY>664</EOY>
      </AccountsReceivable>
      <ReceivablesFromOfficersEtc>
        <EOY>0</EOY>
      </ReceivablesFromOfficersEtc>
      <ReceivablesFromDisqualPersons>
        <EOY>0</EOY>
      </ReceivablesFromDisqualPersons>
      <OtherNotesLoansReceivableNet>
        <EOY>0</EOY>
      </OtherNotesLoansReceivableNet>
      <InventoriesForSaleOrUse>
        <EOY>0</EOY>
      </InventoriesForSaleOrUse>
      <PrepaidExpensesDeferredCharges>
        <BOY>30811</BOY>
        <EOY>47808</EOY>
      </PrepaidExpensesDeferredCharges>
      <LandBuildingsEquipmentBasis>14129256</LandBuildingsEquipmentBasis>
      <LandBldgEquipmentAccumDeprec>2587996</LandBldgEquipmentAccumDeprec>
      <LandBuildingsEquipmentBasisNet>
        <BOY>11928110</BOY>
        <EOY>11541260</EOY>
      </LandBuildingsEquipmentBasisNet>
      <InvestmentsPubTradedSecurities>
        <EOY>0</EOY>
      </InvestmentsPubTradedSecurities>
      <InvestmentsOtherSecurities>
        <BOY>8483305</BOY>
        <EOY>8416843</EOY>
      </InvestmentsOtherSecurities>
      <InvestmentsProgramRelated>
        <EOY>0</EOY>
      </InvestmentsProgramRelated>
      <IntangibleAssets>
        <EOY>0</EOY>
      </IntangibleAssets>
      <OtherAssetsTotal>
        <EOY>0</EOY>
      </OtherAssetsTotal>
      <TotalAssets>
        <BOY>28584768</BOY>
        <EOY>24272636</EOY>
      </TotalAssets>
      <AccountsPayableAccruedExpenses>
        <BOY>140797</BOY>
        <EOY>152943</EOY>
      </AccountsPayableAccruedExpenses>
      <OtherLiabilities>
        <EOY>1</EOY>
      </OtherLiabilities>
      <TotalLiabilities>
        <BOY>140797</BOY>
        <EOY>152944</EOY>
      </TotalLiabilities>
      <FollowSFAS117>X</FollowSFAS117>
      <UnrestrictedNetAssets>
        <BOY>14371743</BOY>
        <EOY>12636292</EOY>
      </UnrestrictedNetAssets>
      <TemporarilyRestrictedNetAssets>
        <BOY>6273951</BOY>
        <EOY>3364816</EOY>
      </TemporarilyRestrictedNetAssets>
      <PermanentlyRestrictedNetAssets>
        <BOY>7798277</BOY>
        <EOY>8118584</EOY>
      </PermanentlyRestrictedNetAssets>
      <TotalNetAssetsFundBalances>
        <BOY>28443971</BOY>
        <EOY>24119692</EOY>
      </TotalNetAssetsFundBalances>
      <TotalLiabNetAssetsFundBalances>
        <BOY>28584768</BOY>
        <EOY>24272636</EOY>
      </TotalLiabNetAssetsFundBalances>
      <MethodOfAccountingAccrual>X</MethodOfAccountingAccrual>
      <AccountantCompileOrReview>false</AccountantCompileOrReview>
      <FSAudited>true</FSAudited>
      <AuditCommittee>true</AuditCommittee>
      <FinancialStatementSeparate>X</FinancialStatementSeparate>
      <FederalGrantAuditRequired>true</FederalGrantAuditRequired>
      <FederalGrantAuditPerformed>true</FederalGrantAuditPerformed>
    </IRS990>
    <IRS990ScheduleA documentId="IRS990ScheduleA" softwareId="09000047" softwareVersion="2009v1.7">
      <PubliclySupportedOrg170b1Avi>X</PubliclySupportedOrg170b1Avi>
      <GiftsGrantsContribReceived170>
        <CurrentTaxYearMinus4Years>2296103</CurrentTaxYearMinus4Years>
        <CurrentTaxYearMinus3Years>1633596</CurrentTaxYearMinus3Years>
        <CurrentTaxYearMinus2Years>9376734</CurrentTaxYearMinus2Years>
        <CurrentTaxYearMinus1Year>3563559</CurrentTaxYearMinus1Year>
        <CurrentTaxYear>2668794</CurrentTaxYear>
        <Total>19538786</Total>
      </GiftsGrantsContribReceived170>
      <TaxRevLeviedForOrgBenefit170>
        <Total>0</Total>
      </TaxRevLeviedForOrgBenefit170>
      <ValueSrvcFcltsFurnishedByGovt>
        <Total>0</Total>
      </ValueSrvcFcltsFurnishedByGovt>
      <Total170>
        <CurrentTaxYearMinus4Years>2296103</CurrentTaxYearMinus4Years>
        <CurrentTaxYearMinus3Years>1633596</CurrentTaxYearMinus3Years>
        <CurrentTaxYearMinus2Years>9376734</CurrentTaxYearMinus2Years>
        <CurrentTaxYearMinus1Year>3563559</CurrentTaxYearMinus1Year>
        <CurrentTaxYear>2668794</CurrentTaxYear>
        <Total>19538786</Total>
      </Total170>
      <AmountsSubstContributorsTotal>4534305</AmountsSubstContributorsTotal>
      <PublicSupportTotal170>15004481</PublicSupportTotal170>
      <GrossInvestmentIncome170>
        <CurrentTaxYearMinus4Years>203778</CurrentTaxYearMinus4Years>
        <CurrentTaxYearMinus3Years>151039</CurrentTaxYearMinus3Years>
        <CurrentTaxYearMinus2Years>246078</CurrentTaxYearMinus2Years>
        <CurrentTaxYearMinus1Year>112726</CurrentTaxYearMinus1Year>
        <CurrentTaxYear>84024</CurrentTaxYear>
        <Total>797645</Total>
      </GrossInvestmentIncome170>
      <NetUBI>
        <Total>0</Total>
      </NetUBI>
      <OtherIncome170>
        <Total>0</Total>
      </OtherIncome170>
      <TotalSupport>20336431</TotalSupport>
      <PublicSupportPertcentage170>0.73780</PublicSupportPertcentage170>
      <PublicSupportPertcentPriorYear>0.97140</PublicSupportPertcentPriorYear>
      <ThirtyThreePercntTestsCY170>X</ThirtyThreePercntTestsCY170>
    </IRS990ScheduleA>
    <IRS990ScheduleB documentId="IRS990ScheduleB" softwareId="09000047" softwareVersion="2009v1.7">
      <ContributorInfo>
        <ContributorNumber>RESTRICTED</ContributorNumber>
        <ContributorNameBusiness>
          <BusinessNameLine1>RESTRICTED</BusinessNameLine1>
        </ContributorNameBusiness>
        <ContributorAddressUS>
          <AddressLine1>RESTRICTED</AddressLine1>
          <AddressLine2>RESTRICTED</AddressLine2>
          <City>RESTRICTED</City>
          <State>RESTRICTED</State>
          <ZIPCode>RESTRICTED</ZIPCode>
        </ContributorAddressUS>
        <AggregateContributions>RESTRICTED</AggregateContributions>
      </ContributorInfo>
    </IRS990ScheduleB>
    <IRS990ScheduleD documentId="IRS990ScheduleD" softwareId="09000047" softwareVersion="2009v1.7">
      <CurrentYear>
        <BeginningOfYearBalance>8386968</BeginningOfYearBalance>
        <Contributions>9200</Contributions>
        <InvestmentEarningsOrLosses>44561</InvestmentEarningsOrLosses>
        <AdministrativeExpenses>52433</AdministrativeExpenses>
        <EndOfYearBalance>8493162</EndOfYearBalance>
      </CurrentYear>
      <CurrentYearMinus1Year>
        <BeginningOfYearBalance>6863715</BeginningOfYearBalance>
        <Contributions>44561</Contributions>
        <InvestmentEarningsOrLosses>73190</InvestmentEarningsOrLosses>
        <EndOfYearBalance>6936905</EndOfYearBalance>
      </CurrentYearMinus1Year>
      <BoardDesignatedEOYBalance>0.03300</BoardDesignatedEOYBalance>
      <PermanentEndowmentEOYBalance>0.96700</PermanentEndowmentEOYBalance>
      <EndowmentsHeldByUnrelatedOrgs>false</EndowmentsHeldByUnrelatedOrgs>
      <EndowmentsHeldByRelatedOrgs>false</EndowmentsHeldByRelatedOrgs>
      <AreRelatedOrgsListedScheduleR>false</AreRelatedOrgsListedScheduleR>
      <LeaseholdImprovements>
        <OtherCostOrOtherBasis>11268381</OtherCostOrOtherBasis>
        <Depreciation>517530</Depreciation>
        <BookValue>10750851</BookValue>
      </LeaseholdImprovements>
      <Equipment>
        <OtherCostOrOtherBasis>2860875</OtherCostOrOtherBasis>
        <Depreciation>2070466</Depreciation>
        <BookValue>790409</BookValue>
      </Equipment>
      <TotalOfBookValueLandBuildings>11541260</TotalOfBookValueLandBuildings>
      <TotalOfBookValueSecurities>8416843</TotalOfBookValueSecurities>
      <OtherLiabilities>
        <Description>Rounding</Description>
        <Amount>1</Amount>
      </OtherLiabilities>
      <TotalOfAmounts>1</TotalOfAmounts>
      <TotalRevenue>3121835</TotalRevenue>
      <TotalExpenses>7419799</TotalExpenses>
      <ExcessOrDeficitForYear>-4297964</ExcessOrDeficitForYear>
      <DonatedServicesAndFacilities>7870</DonatedServicesAndFacilities>
      <PriorPeriodAdjustments>-34185</PriorPeriodAdjustments>
      <TotalAdjustments>-26315</TotalAdjustments>
      <ExcessOrDeficitPerFS>-4324279</ExcessOrDeficitPerFS>
      <TotRevenueEtcAuditedFinclStmt>3129705</TotRevenueEtcAuditedFinclStmt>
      <DonatedSrvcAndUseOfFacilities>7870</DonatedSrvcAndUseOfFacilities>
      <RevenueNotRptdF990>7870</RevenueNotRptdF990>
      <RevenueSubtotal>3121835</RevenueSubtotal>
      <TotalRevenuePerForm990>3121835</TotalRevenuePerForm990>
      <TotExpensesEtcAuditedFinclStmt>7419799</TotExpensesEtcAuditedFinclStmt>
      <ExpensesSubtotal>7419799</ExpensesSubtotal>
      <TotalExpensesPerForm990>7419799</TotalExpensesPerForm990>
      <Form990ScheduleDPartXIV>
        <Identifier>Part V, Line 4</Identifier>
        <ReturnReference>Part V, Line 4: Intended uses of the endowment fund.</ReturnReference>
        <Explanation>Endowments are held to support the work of research professors, postdoctoral scholars, and mathematics circle programs.Part V, Line 1a: The current year beginning balance reflects restatement of prior year ending balance.</Explanation>
      </Form990ScheduleDPartXIV>
    </IRS990ScheduleD>
    <IRS990ScheduleF documentId="IRS990ScheduleF" softwareId="09000047" softwareVersion="2009v1.7">
      <GrantRecordsMaintained>true</GrantRecordsMaintained>
      <TotalNumberOfOffices>0</TotalNumberOfOffices>
      <TotalNumberOfEmployees>0</TotalNumberOfEmployees>
      <TotalAmountSpent>0</TotalAmountSpent>
      <NoRecipientOver5K>X</NoRecipientOver5K>
      <GrantsToIndOutsideUS>
        <TypeOfAssistance>Stipends, Travel Reimbursment and Per Diem</TypeOfAssistance>
        <Region>South America</Region>
        <NumberOfRecipients>13</NumberOfRecipients>
        <AmountOfCashGrant>37244</AmountOfCashGrant>
        <MannerOfCashDisbursement>Check</MannerOfCashDisbursement>
      </GrantsToIndOutsideUS>
      <GrantsToIndOutsideUS>
        <TypeOfAssistance>Stipends, Travel Reimbursment and Per Diem</TypeOfAssistance>
        <Region>North America (Non-US)</Region>
        <NumberOfRecipients>30</NumberOfRecipients>
        <AmountOfCashGrant>81070</AmountOfCashGrant>
        <MannerOfCashDisbursement>Check</MannerOfCashDisbursement>
      </GrantsToIndOutsideUS>
      <GrantsToIndOutsideUS>
        <TypeOfAssistance>Stipends, Travel Reimbursment and Per Diem</TypeOfAssistance>
        <Region>Middle East &amp; North Africa</Region>
        <NumberOfRecipients>2</NumberOfRecipients>
        <AmountOfCashGrant>1496</AmountOfCashGrant>
        <MannerOfCashDisbursement>Check</MannerOfCashDisbursement>
      </GrantsToIndOutsideUS>
      <GrantsToIndOutsideUS>
        <TypeOfAssistance>Stipends, Travel Reimbursment and Per Diem</TypeOfAssistance>
        <Region>Europe</Region>
        <NumberOfRecipients>167</NumberOfRecipients>
        <AmountOfCashGrant>923772</AmountOfCashGrant>
        <MannerOfCashDisbursement>Check</MannerOfCashDisbursement>
      </GrantsToIndOutsideUS>
      <GrantsToIndOutsideUS>
        <TypeOfAssistance>Stipends, Travel Reimbursment and Per Diem</TypeOfAssistance>
        <Region>East Asia &amp; The Pacific</Region>
        <NumberOfRecipients>121</NumberOfRecipients>
        <AmountOfCashGrant>359615</AmountOfCashGrant>
        <MannerOfCashDisbursement>Check</MannerOfCashDisbursement>
      </GrantsToIndOutsideUS>
      <Form990ScheduleFPartIV>
        <Identifier>Grantmaker's Description of How Grants are Used in Foreign Country</Identifier>
        <Explanation>MSRI requires submission of hotel and travel receipts before reimbursing the grantees' expenses.</Explanation>
      </Form990ScheduleFPartIV>
    </IRS990ScheduleF>
    <IRS990ScheduleI documentId="IRS990ScheduleI" softwareId="09000047" softwareVersion="2009v1.7">
      <RecordsMaintained>true</RecordsMaintained>
      <NoGrantMoreThan5000>X</NoGrantMoreThan5000>
      <TotalNbrOf501C3AndGovtGrants>0</TotalNbrOf501C3AndGovtGrants>
      <TotalNbrOfOtherOrganizations>0</TotalNbrOfOtherOrganizations>
      <Form990ScheduleIPartIII>
        <TypeOfGrant>Stipends, Travel Reimbursment and Per Diem</TypeOfGrant>
        <NumberOfRecipients>441</NumberOfRecipients>
        <AmountOfCashGrant>1428220</AmountOfCashGrant>
      </Form990ScheduleIPartIII>
      <Form990ScheduleIPartIV>
        <Identifier>Grantmaker's Description of How Grants are Used</Identifier>
        <Explanation>MSRI requires submission of hotel and travel receipts before reimbursing the grantees' expenses. In addition, for National Security Agency grants, verification of the recipients' United States citizenship is obtained.</Explanation>
      </Form990ScheduleIPartIV>
    </IRS990ScheduleI>
    <IRS990ScheduleJ documentId="IRS990ScheduleJ" softwareId="09000047" softwareVersion="2009v1.7">
      <HousingAllowanceOrResidence>X</HousingAllowanceOrResidence>
      <WrittenPolicyReTAndEExpenses>true</WrittenPolicyReTAndEExpenses>
      <SubstantiationRequired>true</SubstantiationRequired>
      <WrittenEmploymentContract>X</WrittenEmploymentContract>
      <BoardOrCommitteeApproval>X</BoardOrCommitteeApproval>
      <SeverancePayment>false</SeverancePayment>
      <SupplementalNonqualRetirePlan>false</SupplementalNonqualRetirePlan>
      <EquityBasedCompArrangement>false</EquityBasedCompArrangement>
      <CompBasedOnRevenueOfFilingOrg>false</CompBasedOnRevenueOfFilingOrg>
      <CompBasedOnRevenueRelatedOrgs>false</CompBasedOnRevenueRelatedOrgs>
      <CompBasedNetEarningsFilingOrg>false</CompBasedNetEarningsFilingOrg>
      <CompBasedNetEarningsRelateOrgs>false</CompBasedNetEarningsRelateOrgs>
      <AnyNonFixedPayments>false</AnyNonFixedPayments>
      <InitialContractException>false</InitialContractException>
      <RebuttablePresumptionProcedure>false</RebuttablePresumptionProcedure>
      <Form990ScheduleJPartII>
        <NamePerson>Helene Barcelo</NamePerson>
        <BaseCompensationFilingOrg>153850</BaseCompensationFilingOrg>
        <DeferredCompFilingOrg>15375</DeferredCompFilingOrg>
        <NontaxableBenefitsFilingOrg>9589</NontaxableBenefitsFilingOrg>
        <TotalCompensationFilingOrg>178814</TotalCompensationFilingOrg>
      </Form990ScheduleJPartII>
      <Form990ScheduleJPartII>
        <NamePerson>David Auckly</NamePerson>
        <BaseCompensationFilingOrg>134700</BaseCompensationFilingOrg>
        <DeferredCompFilingOrg>11310</DeferredCompFilingOrg>
        <NontaxableBenefitsFilingOrg>4583</NontaxableBenefitsFilingOrg>
        <TotalCompensationFilingOrg>150593</TotalCompensationFilingOrg>
      </Form990ScheduleJPartII>
      <Form990ScheduleJPartIII>
        <Identifier>Sch J, Part III, Additional Information</Identifier>
        <ReturnReference>Part III, Additional Information</ReturnReference>
        <Explanation>MSRI offers a monetary housing allowance to incent successful job candidates to accept their offer. The cost of living is very high in the CA Bay Area. In addition, the associate director position is a two-year position. The annual value of the housing allowance received was $21,600.</Explanation>
      </Form990ScheduleJPartIII>
      <Form990ScheduleJPartIII>
        <Identifier>Sch J, Part I, Line 1a</Identifier>
        <ReturnReference>Part I, Line 1a: Relevant information in regards to selections on 1a.</ReturnReference>
      </Form990ScheduleJPartIII>
    </IRS990ScheduleJ>
    <IRS990ScheduleO documentId="IRS990ScheduleO" softwareId="09000047" softwareVersion="2009v1.7">
      <GeneralExplanation>
        <Identifier>Amended Explanation</Identifier>
        <Explanation>Due to management turnover and delays in the completion of the audit, the process of trying to file the returns timely was rushed, and some small changes were overlooked. These involved the following: Form 990, Part VI, Line 2: Amendments were made to disclose business relationships between the Officers and Directors.Form 990, Part VII, Section A: Amendments were made to reflect all of the current officers, misclassified previously as key employees and/or highest paid employees. A correction was made to the spelling of a Board member's name.Form 990, Schedule D, Part V, Line 1c: The net investment earnings were erroneously left off of the previously filed return.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <Identifier>Form 990, Part VI, Line 19</Identifier>
        <ReturnReference>Form 990, Part VI, Line 19: Other Organization Documents Publicly Available</ReturnReference>
        <Explanation>Documents are made available upon request.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <Identifier>Form 990, Part VI, Line 15b</Identifier>
        <ReturnReference>Form 990, Part VI, Line 15b: Compensation Review and Approval Process for Officers and Key Employees</ReturnReference>
        <Explanation>Key employee compensation is set by the Director and approved by the Board of Trustees in the budgeting process.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <Identifier>Form 990, Part VI, Line 12c</Identifier>
        <ReturnReference>Form 990, Part VI, Line 12c: Explanation of Monitoring and Enforcement of Conflicts</ReturnReference>
        <Explanation>Conflict of interest statements are completed annually and reviewed by the Board of Directors. Follow-up on any resulting conflicts occurs at the time of the annual review.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <Identifier>Form 990, Part VI, Line 11</Identifier>
        <ReturnReference>Form 990, Part VI, Line 11: Form 990 Review Process</ReturnReference>
        <Explanation>The Form 990 was distributed to the finance committee before filing.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <Identifier>Form 990, Part VI, Line 2</Identifier>
        <ReturnReference>Form 990, Part VI, Line 2: Description of Business or Family Relationship of Officers, Directors, Et</ReturnReference>
        <Explanation>Some of the directors have careers as investors and fellow directors hold investments in funds they manage.</Explanation>
      </GeneralExplanation>
    </IRS990ScheduleO>
  </ReturnData>
</Return>