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        <PersonNm>Nancy Yang</PersonNm>
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        <PersonNm>Jonathan D Klein</PersonNm>
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        <ExplanationTxt>The School follows FASB ASC 740, "Income Taxes", which clarifies the accounting for uncertain income tax positions by prescribing the recognition threshold a tax position is required to meet before being recognized in the financial statements. The School recognizes a tax benefit from an uncertain tax position only if it is more likely than not that the tax position will be sustained on examination by the taxing authorities. Management evaluated the School's tax positions and concluded that the School had no material uncertain income tax positions as of June 30, 2016 or 2015. The School is no longer subject to income tax examinations by the US federal, state, or local tax authorities for fiscal years before 2013. The School will account for interest and penalties related to uncertain tax positions, if any, as part of the tax expense.</ExplanationTxt>
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        <TotalCompensationFilingOrgAmt>174606</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Schedule J, Part I, Line 1a</FormAndLineReferenceDesc>
        <ExplanationTxt>Faculty are required to live in on-campus housing as a condition of employment. The Headmaster's home includes some space that is reserved for School related meetings and student activities. The cost of maintaining this allotted space is paid by the School and recorded as an operating expense. The Headmaster's contract, which is approved by the Board President and the Compensation Committee, includes the cost of residential cleaning. The cost is recorded by the School as a taxable benefit and reported on the W-2. The School will only pay for the cost of a traveling spouse when they are an authorized participant in School related functions. In such a case, the cost is treated as a non-taxable work related event. The discretionary account is provided to the Headmaster as part of the approved annual budget. The account is used to fund small School related expenses and, as a result, is not reported as a taxable fringe benefit.</ExplanationTxt>
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    </IRS990ScheduleJ>
    <IRS990ScheduleK documentId="R000010" softwareId="15000352" softwareVersionNum="v1.00">
      <TaxExemptBondsIssuesGrp>
        <BondReferenceCd>A</BondReferenceCd>
        <IssuerName>
          <BusinessNameLine1Txt>Massachusetts Development Finance Agency</BusinessNameLine1Txt>
        </IssuerName>
        <BondIssuerEIN>043431814</BondIssuerEIN>
        <BondIssuedDt>2013-10-17</BondIssuedDt>
        <IssuePriceAmt>75000000</IssuePriceAmt>
        <PurposeDesc>Building renovations &amp; refinancing existing debt</PurposeDesc>
        <DefeasedInd>0</DefeasedInd>
        <OnBehalfOfIssuerInd>0</OnBehalfOfIssuerInd>
        <PoolFinancingInd>0</PoolFinancingInd>
      </TaxExemptBondsIssuesGrp>
      <TaxExemptBondsProceedsGrp>
        <BondReferenceCd>A</BondReferenceCd>
        <RetiredAmt>3457500</RetiredAmt>
        <BondDefeasedAmt>0</BondDefeasedAmt>
        <TotalProceedsAmt>75000000</TotalProceedsAmt>
        <InReserveFundAmt>0</InReserveFundAmt>
        <CapitalizedInterestAmt>644020</CapitalizedInterestAmt>
        <RefundingEscrowAmt>48640000</RefundingEscrowAmt>
        <IssuanceCostsFromProceedsAmt>474250</IssuanceCostsFromProceedsAmt>
        <CreditEnhancementAmt>0</CreditEnhancementAmt>
        <WorkingCapitalExpendituresAmt>0</WorkingCapitalExpendituresAmt>
        <CapitalExpendituresAmt>25885750</CapitalExpendituresAmt>
        <OtherSpentProceedsAmt>0</OtherSpentProceedsAmt>
        <UnspentAmt>0</UnspentAmt>
        <SubstantialCompletionYr>2016</SubstantialCompletionYr>
        <CurrentRefundingInd>1</CurrentRefundingInd>
        <AdvanceRefundingInd>0</AdvanceRefundingInd>
        <FinalAllocationMadeInd>1</FinalAllocationMadeInd>
        <AdequateBooksAndRecMaintInd>1</AdequateBooksAndRecMaintInd>
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      <TaxExemptBondsPrivateBusUseGrp>
        <BondReferenceCd>A</BondReferenceCd>
        <OwningBondFinancedPropertyInd>0</OwningBondFinancedPropertyInd>
        <AnyLeaseArrangementsInd>0</AnyLeaseArrangementsInd>
        <MgmtContractBondFincdPropInd>0</MgmtContractBondFincdPropInd>
        <AnyResearchAgreementsInd>0</AnyResearchAgreementsInd>
        <PrivateBusUseByOthersPct>0</PrivateBusUseByOthersPct>
        <PrivateBusConcerningUBIPct>0</PrivateBusConcerningUBIPct>
        <TotalPrivateBusinessUsePct>0</TotalPrivateBusinessUsePct>
        <BondIssMeetPrvtSecPymtTestInd>0</BondIssMeetPrvtSecPymtTestInd>
        <ChangeInUseBondFinancedPropInd>0</ChangeInUseBondFinancedPropInd>
        <ProcsNonqualifiedBondRemdtdInd>1</ProcsNonqualifiedBondRemdtdInd>
      </TaxExemptBondsPrivateBusUseGrp>
      <TaxExemptBondsArbitrageGrp>
        <BondReferenceCd>A</BondReferenceCd>
        <Form8038TFiledInd>0</Form8038TFiledInd>
        <RebateNotDueYetInd>0</RebateNotDueYetInd>
        <ExceptionToRebateInd>0</ExceptionToRebateInd>
        <NoRebateDueInd>0</NoRebateDueInd>
        <VariableRateIssueInd>1</VariableRateIssueInd>
        <HedgeIdentifiedInBksAndRecInd>1</HedgeIdentifiedInBksAndRecInd>
        <HedgeProviderName>
          <BusinessNameLine1Txt>Morgan Stanley Capital Services</BusinessNameLine1Txt>
          <BusinessNameLine2Txt>Bank of New York Mellon</BusinessNameLine2Txt>
        </HedgeProviderName>
        <TermOfHedgePct>30</TermOfHedgePct>
        <SuperintegratedHedgeInd>0</SuperintegratedHedgeInd>
        <HedgeTerminatedInd>0</HedgeTerminatedInd>
        <GrossProceedsInvestedInGICInd>0</GrossProceedsInvestedInGICInd>
        <GrossProceedsInvestedInd>0</GrossProceedsInvestedInd>
        <WrittenProcToMonitorReqsInd>1</WrittenProcToMonitorReqsInd>
      </TaxExemptBondsArbitrageGrp>
      <ProceduresCorrectiveActionGrp>
        <BondReferenceCd>A</BondReferenceCd>
        <ProceduresCorrectiveActionInd>1</ProceduresCorrectiveActionInd>
      </ProceduresCorrectiveActionGrp>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Schedule K, Part IV, Line 4b-10/17/2013 75,000,000 Massachusetts Development Finance Agency</FormAndLineReferenceDesc>
        <ExplanationTxt>The Bank of New York Mellon Swap 15 Years, The Bank of New York Mellon Swap 38 Years, and Morgan Stanley Capital Services Swap 30 Years.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleK>
    <IRS990ScheduleL documentId="R000011" softwareId="15000352" softwareVersionNum="v1.00">
      <BusTrInvolveInterestedPrsnGrp>
        <NameOfInterested>
          <PersonNm>Vuyelwa M Maqubela</PersonNm>
        </NameOfInterested>
        <RelationshipDescriptionTxt>Family member of Temba Maqubela, Headmaster</RelationshipDescriptionTxt>
        <TransactionAmt>108067</TransactionAmt>
        <TransactionDesc>Employment</TransactionDesc>
        <SharingOfRevenuesInd>0</SharingOfRevenuesInd>
      </BusTrInvolveInterestedPrsnGrp>
    </IRS990ScheduleL>
    <IRS990ScheduleM documentId="R000012" softwareId="15000352" softwareVersionNum="v1.00">
      <SecuritiesPubliclyTradedGrp>
        <NonCashCheckboxInd>X</NonCashCheckboxInd>
        <ContributionCnt>97</ContributionCnt>
        <NoncashContributionsRptF990Amt>1667250</NoncashContributionsRptF990Amt>
        <MethodOfDeterminingRevenuesTxt>FMV</MethodOfDeterminingRevenuesTxt>
      </SecuritiesPubliclyTradedGrp>
      <Form8283ReceivedCnt>0</Form8283ReceivedCnt>
      <AnyPropertyThatMustBeHeldInd>0</AnyPropertyThatMustBeHeldInd>
      <ReviewProcessUnusualNCGiftsInd>1</ReviewProcessUnusualNCGiftsInd>
      <ThirdPartiesUsedInd>0</ThirdPartiesUsedInd>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Schedule M, Part I, Line 33</FormAndLineReferenceDesc>
        <ExplanationTxt>The number of security contributions is based on the number of gifts and not the number of shares received.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleM>
    <IRS990ScheduleO documentId="R000013" softwareId="15000352" softwareVersionNum="v1.00">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, Line 11b</FormAndLineReferenceDesc>
        <ExplanationTxt>A draft of the Form 990 without Schedule B was distributed electronically to each member of the Audit Committee. After a thorough review, the Committee had an opportunity to ask questions and suggest revisions during a group conference call. The draft was also posted to a secure electronic portal, accessible by the full Board, prior to filing.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, Line 12c</FormAndLineReferenceDesc>
        <ExplanationTxt>All School officers, key employees, and members of the Board of Trustees are required annually to read the conflict of interest policy and sign the document. This signature indicates an understanding of the guidelines and an assurance to the Board that they are in compliance with the policy. Any potential conflict must be disclosed and reviewed by the President of the Board to determine if further action is required. Any identified conflict will prohibit such individual from participating in the governing body's deliberations and transaction decisions related to the conflict.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, Line 15</FormAndLineReferenceDesc>
        <ExplanationTxt>An employment contract between the Headmaster and the School is updated periodically and renewed annually. Each year, the President of the Board and the Compensation Committee review the Headmaster's and other senior administrator's salaries and benefits. The salary survey provided by the Association of Business Officers of Preparatory Schools is used as a guide and a point of comparison. The annual salary and benefit offerings for the Chief Financial Officer are made by the Headmaster. All salaries and benefit offerings for the remaining School employees are updated annually and approved by the Chief Financial Officer or the Headmaster up to the aggregate salary increase approved by the Board of Trustees.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section C, Line 19</FormAndLineReferenceDesc>
        <ExplanationTxt>The Form 990 without Schedule B can be viewed on-line by going to guidestar.org, an independently operated website. The Conflict of Interest Policy and the Governing Documents may be viewed any time upon request for the same period of disclosure set forth in Section 6104(d).</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part XI, Line 9</FormAndLineReferenceDesc>
        <ExplanationTxt>Change in value of interest rate swap agreements (3,026,155), accrued pension liability (2,527,291), recovery provision for uncollectible pledges (283,126), and split interest agreements 43,118.</ExplanationTxt>
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    </IRS990ScheduleO>
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        <RelatedOrganizationName>
          <BusinessNameLine1Txt>Charitable Remainder Trust (5)</BusinessNameLine1Txt>
        </RelatedOrganizationName>
        <USAddress>
          <AddressLine1Txt>PO Box 991</AddressLine1Txt>
          <CityNm>Groton</CityNm>
          <StateAbbreviationCd>MA</StateAbbreviationCd>
          <ZIPCd>01450</ZIPCd>
        </USAddress>
        <PrimaryActivitiesTxt>Charitable Trust</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>MA</LegalDomicileStateCd>
        <DirectControllingEntityName>
          <BusinessNameLine1Txt>Groton School</BusinessNameLine1Txt>
        </DirectControllingEntityName>
        <EntityTypeTxt>T</EntityTypeTxt>
        <ControlledOrganizationInd>1</ControlledOrganizationInd>
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      <IdRelatedOrgTxblCorpTrGrp>
        <RelatedOrganizationName>
          <BusinessNameLine1Txt>Pooled Income Fund</BusinessNameLine1Txt>
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        <USAddress>
          <AddressLine1Txt>PO Box 991</AddressLine1Txt>
          <CityNm>Groton</CityNm>
          <StateAbbreviationCd>MA</StateAbbreviationCd>
          <ZIPCd>01450</ZIPCd>
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        <PrimaryActivitiesTxt>Pooled Income Fund</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>MA</LegalDomicileStateCd>
        <DirectControllingEntityName>
          <BusinessNameLine1Txt>Groton School</BusinessNameLine1Txt>
        </DirectControllingEntityName>
        <EntityTypeTxt>T</EntityTypeTxt>
        <ControlledOrganizationInd>1</ControlledOrganizationInd>
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      <IdRelatedOrgTxblCorpTrGrp>
        <RelatedOrganizationName>
          <BusinessNameLine1Txt>Growth Pooled Income Fund</BusinessNameLine1Txt>
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        <USAddress>
          <AddressLine1Txt>PO Box 991</AddressLine1Txt>
          <CityNm>Groton</CityNm>
          <StateAbbreviationCd>MA</StateAbbreviationCd>
          <ZIPCd>01450</ZIPCd>
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        <PrimaryActivitiesTxt>Pooled Income Fund</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>MA</LegalDomicileStateCd>
        <DirectControllingEntityName>
          <BusinessNameLine1Txt>Groton School</BusinessNameLine1Txt>
        </DirectControllingEntityName>
        <EntityTypeTxt>T</EntityTypeTxt>
        <ControlledOrganizationInd>1</ControlledOrganizationInd>
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      <ReceiptOfIntAnntsRntsRyltsInd>0</ReceiptOfIntAnntsRntsRyltsInd>
      <GiftGrntOrCapContriToOthOrgInd>0</GiftGrntOrCapContriToOthOrgInd>
      <GiftGrntCapContriFromOthOrgInd>0</GiftGrntCapContriFromOthOrgInd>
      <LoansOrGuaranteesToOtherOrgInd>0</LoansOrGuaranteesToOtherOrgInd>
      <LoansOrGuaranteesFromOthOrgInd>0</LoansOrGuaranteesFromOthOrgInd>
      <DivRelatedOrganizationInd>0</DivRelatedOrganizationInd>
      <AssetSaleToOtherOrgInd>0</AssetSaleToOtherOrgInd>
      <AssetPurchaseFromOtherOrgInd>0</AssetPurchaseFromOtherOrgInd>
      <AssetExchangeInd>1</AssetExchangeInd>
      <RentalOfFacilitiesToOthOrgInd>0</RentalOfFacilitiesToOthOrgInd>
      <RentalOfFcltsFromOthOrgInd>0</RentalOfFcltsFromOthOrgInd>
      <PerformOfServicesForOthOrgInd>0</PerformOfServicesForOthOrgInd>
      <PerformOfServicesByOtherOrgInd>0</PerformOfServicesByOtherOrgInd>
      <SharingOfFacilitiesInd>0</SharingOfFacilitiesInd>
      <PaidEmployeesSharingInd>0</PaidEmployeesSharingInd>
      <ReimbursementPaidToOtherOrgInd>0</ReimbursementPaidToOtherOrgInd>
      <ReimbursementPaidByOtherOrgInd>0</ReimbursementPaidByOtherOrgInd>
      <TransferToOtherOrgInd>0</TransferToOtherOrgInd>
      <TransferFromOtherOrgInd>0</TransferFromOtherOrgInd>
      <TransactionsRelatedOrgGrp>
        <OtherOrganizationName>
          <BusinessNameLine1Txt>Pooled Income Fund</BusinessNameLine1Txt>
        </OtherOrganizationName>
        <TransactionTypeTxt>s</TransactionTypeTxt>
        <InvolvedAmt>124531</InvolvedAmt>
        <MethodOfAmountDeterminationTxt>The aggregate annual transfers from the fund to the School that represent the value of the fund assigned to the beneficiaries upon their death.</MethodOfAmountDeterminationTxt>
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    </IRS990ScheduleR>
    <ReasonableCauseExplanation documentId="R000015" softwareId="15000352" softwareVersionNum="v1.00">
      <ExplanationTxt>The form 8868, an application for Extension of Time to File an Exempt Organization Return, was filed on November 14, 2016. This extension provides the School's Board of Trustees the time necessary to complete a thorough review of the return.</ExplanationTxt>
    </ReasonableCauseExplanation>
  </ReturnData>
</Return>