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      <MissionDesc>COMPLETE THE DEVELOPMENT/REDEVELOPMENT OF SCIENCE PARK AND ITS ENVIRONS FOR THE PURPOSE OF INCREASING EMPLOYMENT IN THE CITY OF NEW HAVEN IN GENERAL AND THE DIXWELL AND NEWHALLVILLE NEIGHBORHOODS IN PARTICULAR, INCREASING THE TAX BASE IN THE CITY OF NEW HAVEN, ATTRACTING RESEARCH AND TECHNOLOGICAL ENTERPRISES, AND THE EXTENT COMPATIBLE WITH THE FOREGOING, INCREASING THE VARIETY OF HOUSING IN SCIENCE PARK AND ITS ENVIRONS.</MissionDesc>
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      <Desc>SCIENCE PARK DEVELOPMENT CORPORATION ("SPDC") WAS ESTABLISHED IN AUGUST OF 1981 AS A PART OF A COOPERATIVE EFFORT BY THE CITY OF NEW HAVEN, THE STATE OF CONNECTICUT, YALE UNIVERSITY, AND OLIN CORPORATION TO MOBILIZE THEIR CONSIDERABLE RESOURCES TO CREATE A NEW ECONOMIC BASE AT THE SITE OF A MULTI-TRACT, PREDOMINANTLY VACANT, INDUSTRIAL COMPLEX ADJACENT TO THE YALE SCIENCE HILL CAMPUS AND IN NEW HAVEN'S STATE-DESIGNATED ENTERPRISE ZONE. IT'S GOAL IS TO FURTHER THE REVITALIZATION OF THE CITY OF NEW HAVEN THROUGH THE DEVELOPMENT OF OFFICE AND LAB SPACES FOR TECH AND BIOTECH COMPANIES AND THROUGH THE ESTABLISHMENT OF A VARIETY OF HOUSING IN SCIENCE PARK WHICH WILL RESULT IN THE ENHANCEMENT EMPLOYMENT OPPORTUNITIES FOR AREA RESIDENTS, RELIEF OF POVERTY AND NEIGHBORHOOD TENSION, AND THE PREVENTION OF BLIGHT AND DETERIORATION IN THE SURROUNDING DIXWELL-NEWHALLVILLE NEIGHBORHOOD AREAS.IN JULY OF 1998, THE CONNECTICUT HOUSING FINANCE AUTHORITY ("CHFA") AND THE DEPARTMENT OF ECONOMIC AND COMMUNITY DEVELOPMENT ("DECD") COMMITTED $15 MILLION TO DEMOLISH OBSOLETE STRUCTURES, AND TO REHABILITATE AND/OR CONSTRUCT NEW BUILDINGS IN THE PARK TO SUPPORT THE REDEVELOPMENT AND EXPANSION 140,000 SQUARE FEET OF OFFICES AND LAB SPACE IN 4 AND 5 SCIENCE PARK. THESE WERE IN ADDITION TO PREVIOUS COMMITMENTS TO THE PARK FROM THE CONNECTICUT DEVELOPMENT AUTHORITY ("CDA", NOW CONNECTICUT INNOVATIONS INC. "CII") AND DECD. IN ADDITION, YALE UNIVERSITY, OLIN CORPORATION AND THE CITY OF NEW HAVEN PROVIDED ADDITIONAL FUNDS, LAND OR CAPITAL TO FURTHER DEVELOPMENT OF THE PARK.SINCE 2000, THROUGH VARIOUS GROUND LEASES WITH DEVELOPERS, OFFICE/LAB BUILDINGS AND PARKING LOTS HAVE BEEN RENOVATED AND ABANDONED AND DERELICT BUILDINGS HAVE BEEN DEMOLISHED. IN ADDITION, A 1000-CAR PARKING STRUCTURE, CHILLER PLAN AND PARKING LOTS HAVE BEEN CONSTRUCTED AND HISTORIC FACTORY BUILDINGS HAVE BEEN RENOVATED INTO AN OFFICE BUILDING (2011) AND 158 LOFT-STYLE RESIDENTIAL APARTMENTS (2015), 20% OF WHICH ARE CHFA AFFORDABLE UNITS.IN 2014, TWO OF THE GROUND LEASES WERE SOLD TO THE OWNERS OF THE BUILDINGS THEREON. SINCE THEN, OVER $2 MILLION WAS INVESTED IN REPAIRS TO 4 AND 5 SCIENCE PARK, AS WELL AS THE ENVIRONMENTAL ASSESSMENT AND DEVELOPMENT DESIGN FOR THE UNDEVELOPED REMAINS OF SCIENCE PARK'S EASTERN COURTYARD OF TRACT A ("EASTERN COURTYARD"). SPDC RECEIVED A $485,000 SUBGRANT THROUGH CTNEXT'S INNOVATION PLACES PROGRAM IN 2017 AND TOGETHER WITH A TENANT INVESTED OVER $700,000 AND EXPANDED THE INFRASTRUCTURE OF LIFE SCIENCE SUPPORT SERVICES IN 4 SCIENCE PARK, AVAILABLE FOR BOTH SPDC TENANTS AND THE NEW HAVEN BIOTECH COMMUNITY. THIS INFRASTRUCTURE WAS FURTHER EXPANDED IN 2021 BY ANOTHER TENANT IN ORDER TO MAXIMIZE SERVICES IN THE PARK. SINCE DECEMBER 2017, SPDC HAS BEEN WORKING WITH A NEW DEVELOPMENT PARTNER FOR THE LAST 300,000 SQUARE FEET AND COMPLETING THE ENVIRONMENTAL ASSESSMENT OF THE EASTERN COURTYARD WITH A $200,000 DECD BROWNFIELDS GRANT AWARDED IN LATE 2018 AND A $2 MILLION BROWNFIELDS REMEDIATION GRANT AWARDED IN 2021. IN DECEMBER 2022, THE CITY OF NEW HAVEN WAS AWARDED A CONDITIONAL $2 MILLION BROWNFIELD AWARD TO BENEFIT SPDC AS ADDITIONAL FUNDING FOR THE DEMOLITION AND REMEDIATION OF THE EASTERN COURTYARD. UPON ITS EXPIRATION IN DECEMBER 2023, THE CONDITIONAL AWARD WAS TRANSFERRED TO SPDC AS APPLICANT WITH A FIRM AWARD AND CERTAIN DEVELOPMENT REQUIREMENTS STIPULATED IN A MEMORANDUM OF AGREEMENT BETWEEN DECD AND SPDC. IN 2024, SPDC WAS AWARDED AN ADDITIONAL $6.8 MILLION FROM DECD BROWNFIELDS AND URBAN SITES REMEDIAL ACTION PROGRAM TO COMPLETE THE DEMOLITION AND REMEDIATION OF THE EASTERN COURTYARD. AN AGREEMENT WITH DECD WAS REACHED IN DECEMBER 2024 WHEREIN SPDC WOULD DEMOLISH AND REMEDIATE THE EASTERN COURTYARD BUILDINGS. UNDER THE TERMS OF THAT AGREEMENT, SPDC MUST BUILD OR CAUSE TO BE BUILT EITHER A MINIMUM OF 100 HOUSING UNITS OF 100,000 SQUARE FEET OF LAB/OFFICE SPACE BY 2030. BY THE END OF 2023, SPDC'S CURRENT DEVELOPMENT PARTNER HAD RECEIVED ALL STATE AND LOCAL APPROVALS, AND FINALIZED PLANS AND RELATED FINANCING TO DEVELOP A MIXED USE BUILDING WITH ALMOST 300 APARTMENTS, INCLUDING 20% RESERVED FOR AFFORDABLE HOUSING, AND PARKING ON THE WINCHESTER AVENUE SURFACE PARKING LOT KNOWN AS TRACT E. SIMULTANEOUSLY, SPDC WAS AWARDED A $5 MILLION DECD URBAN ACTION GRANT THROUGH THE CITY OF NEW HAVEN TO CREATE PUBLIC OPEN SPACE AND OPEN UP ROADS THROUGH THE SITE FOR COMMUNITY ACCESS AND ENJOYMENT. BOTH PROJECTS SHOULD BE COMPLETED IN THE FIRST QUARTER OF 2026.THE PARK HAS CONTINUED TO ATTRACT START-UP BIOTECH AND TECHNOLOGY FIRMS IN SMALL SUITES AS WELL AS SHARED LAB SPACES. SPDC HAS CONTINUED TO MAKE OFFICE SPACE AVAILABLE TO SOCIAL SERVICES, VOCATIONAL TRAINING AND LITERACY ORGANIZATIONS, WHICH DIRECTLY SERVE THE FAMILIES IN THE NEIGHBORHOOD AND THROUGHOUT NEW HAVEN. THE ENTIRE SCIENCE PARK PLANNED DEVELOPMENT DISTRICT, INCLUDING PROPERTIES NOT OWNED BY SPDC, TALLIES OVER 30 COMPANIES, CAFES, NOT-FOR-PROFIT ORGANIZATIONS AND UNIVERSITY AFFILIATES COMBINED WITH AN ESTIMATED 1600+ EMPLOYEES. DUE TO THE CLOSE PROXIMITY TO YALE'S RESEARCH FACILITIES AND NEW HAVEN'S POSITION AS A NEW BIOSCIENCE ECONOMIC CLUSTER, THE DEMAND FOR LAB SPACE IN NEW HAVEN HAS LED TO NEAR FULL OCCUPANCY OF SPDC-OWNED BUILDINGS SINCE 2019.</Desc>
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        <TitleTxt>EXEC. DIR. &amp; ASST. SECRETA</TitleTxt>
        <AverageHoursPerWeekRt>30.00</AverageHoursPerWeekRt>
        <OfficerInd>X</OfficerInd>
        <ReportableCompFromOrgAmt>97969</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>NICLAS A FERLAND</PersonNm>
        <TitleTxt>SECRETARY</TitleTxt>
        <AverageHoursPerWeekRt>1.00</AverageHoursPerWeekRt>
        <OfficerInd>X</OfficerInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <TotalReportableCompFromOrgAmt>169969</TotalReportableCompFromOrgAmt>
      <TotReportableCompRltdOrgAmt>0</TotReportableCompRltdOrgAmt>
      <TotalOtherCompensationAmt>0</TotalOtherCompensationAmt>
      <IndivRcvdGreaterThan100KCnt>0</IndivRcvdGreaterThan100KCnt>
      <FormerOfcrEmployeesListedInd>0</FormerOfcrEmployeesListedInd>
      <TotalCompGreaterThan150KInd>0</TotalCompGreaterThan150KInd>
      <CompensationFromOtherSrcsInd>0</CompensationFromOtherSrcsInd>
      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>WINCHESTER TRACT E SOUTH LLC</BusinessNameLine1Txt>
          </BusinessName>
        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>1865 PALMER AVENUE 2ND FLOOR</AddressLine1Txt>
            <CityNm>LARCHMONT</CityNm>
            <StateAbbreviationCd>NY</StateAbbreviationCd>
            <ZIPCd>10538</ZIPCd>
          </USAddress>
        </ContractorAddress>
        <ServicesDesc>LAND DEVELOPMENT</ServicesDesc>
        <CompensationAmt>1901431</CompensationAmt>
      </ContractorCompensationGrp>
      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>SSC INC</BusinessNameLine1Txt>
          </BusinessName>
        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>25 CONTROLS DRIVE</AddressLine1Txt>
            <CityNm>SHELTON</CityNm>
            <StateAbbreviationCd>CT</StateAbbreviationCd>
            <ZIPCd>06484</ZIPCd>
          </USAddress>
        </ContractorAddress>
        <ServicesDesc>SECURITY</ServicesDesc>
        <CompensationAmt>305378</CompensationAmt>
      </ContractorCompensationGrp>
      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>THE WM M HOTCHKISS CO</BusinessNameLine1Txt>
          </BusinessName>
        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>PO BOX 801</AddressLine1Txt>
            <CityNm>NEW HAVEN</CityNm>
            <StateAbbreviationCd>CT</StateAbbreviationCd>
            <ZIPCd>06503</ZIPCd>
          </USAddress>
        </ContractorAddress>
        <ServicesDesc>PROPERTY MANAGEMENT</ServicesDesc>
        <CompensationAmt>251323</CompensationAmt>
      </ContractorCompensationGrp>
      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>COLLIERS</BusinessNameLine1Txt>
          </BusinessName>
        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>864 WETHERSFIELD AVENUE</AddressLine1Txt>
            <CityNm>HARTFORD</CityNm>
            <StateAbbreviationCd>CT</StateAbbreviationCd>
            <ZIPCd>06114</ZIPCd>
          </USAddress>
        </ContractorAddress>
        <ServicesDesc>LEASING</ServicesDesc>
        <CompensationAmt>194862</CompensationAmt>
      </ContractorCompensationGrp>
      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>PERFORMANCE ENVIROMENTAL SERVICES LLC</BusinessNameLine1Txt>
          </BusinessName>
        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>111 KENDALL ST</AddressLine1Txt>
            <CityNm>NEW HAVEN</CityNm>
            <StateAbbreviationCd>CT</StateAbbreviationCd>
            <ZIPCd>06512</ZIPCd>
          </USAddress>
        </ContractorAddress>
        <ServicesDesc>JANITORIAL SERVICES</ServicesDesc>
        <CompensationAmt>145106</CompensationAmt>
      </ContractorCompensationGrp>
      <CntrctRcvdGreaterThan100KCnt>7</CntrctRcvdGreaterThan100KCnt>
      <GovernmentGrantsAmt>2569342</GovernmentGrantsAmt>
      <TotalContributionsAmt>2569342</TotalContributionsAmt>
      <ProgramServiceRevenueGrp>
        <Desc>RENTAL REVENUE</Desc>
        <BusinessCd>531120</BusinessCd>
        <TotalRevenueColumnAmt>3998737</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>3998737</RelatedOrExemptFuncIncomeAmt>
      </ProgramServiceRevenueGrp>
      <TotalProgramServiceRevenueAmt>3998737</TotalProgramServiceRevenueAmt>
      <InvestmentIncomeGrp>
        <TotalRevenueColumnAmt>36979</TotalRevenueColumnAmt>
        <ExclusionAmt>36979</ExclusionAmt>
      </InvestmentIncomeGrp>
      <OtherRevenueMiscGrp>
        <Desc>MISCELLANEOUS INCOME</Desc>
        <BusinessCd>541900</BusinessCd>
        <TotalRevenueColumnAmt>83310</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>83310</RelatedOrExemptFuncIncomeAmt>
      </OtherRevenueMiscGrp>
      <OtherRevenueTotalAmt>83310</OtherRevenueTotalAmt>
      <TotalRevenueGrp>
        <TotalRevenueColumnAmt>6688368</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>4082047</RelatedOrExemptFuncIncomeAmt>
        <UnrelatedBusinessRevenueAmt>0</UnrelatedBusinessRevenueAmt>
        <ExclusionAmt>36979</ExclusionAmt>
      </TotalRevenueGrp>
      <CompCurrentOfcrDirectorsGrp>
        <TotalAmt>169969</TotalAmt>
        <ProgramServicesAmt>118978</ProgramServicesAmt>
        <ManagementAndGeneralAmt>50991</ManagementAndGeneralAmt>
      </CompCurrentOfcrDirectorsGrp>
      <PayrollTaxesGrp>
        <TotalAmt>7770</TotalAmt>
        <ProgramServicesAmt>5439</ProgramServicesAmt>
        <ManagementAndGeneralAmt>2331</ManagementAndGeneralAmt>
      </PayrollTaxesGrp>
      <FeesForServicesManagementGrp>
        <TotalAmt>223616</TotalAmt>
        <ProgramServicesAmt>223616</ProgramServicesAmt>
      </FeesForServicesManagementGrp>
      <FeesForServicesLegalGrp>
        <TotalAmt>73139</TotalAmt>
        <ProgramServicesAmt>69945</ProgramServicesAmt>
        <ManagementAndGeneralAmt>3194</ManagementAndGeneralAmt>
      </FeesForServicesLegalGrp>
      <FeesForServicesAccountingGrp>
        <TotalAmt>40170</TotalAmt>
        <ProgramServicesAmt>28119</ProgramServicesAmt>
        <ManagementAndGeneralAmt>12051</ManagementAndGeneralAmt>
      </FeesForServicesAccountingGrp>
      <FeesForSrvcInvstMgmntFeesGrp>
        <TotalAmt>4900</TotalAmt>
        <ManagementAndGeneralAmt>4900</ManagementAndGeneralAmt>
      </FeesForSrvcInvstMgmntFeesGrp>
      <FeesForServicesOtherGrp>
        <TotalAmt>139594</TotalAmt>
        <ProgramServicesAmt>96048</ProgramServicesAmt>
        <ManagementAndGeneralAmt>43546</ManagementAndGeneralAmt>
      </FeesForServicesOtherGrp>
      <AdvertisingGrp>
        <TotalAmt>1600</TotalAmt>
        <ManagementAndGeneralAmt>1600</ManagementAndGeneralAmt>
      </AdvertisingGrp>
      <OfficeExpensesGrp>
        <TotalAmt>12216</TotalAmt>
        <ManagementAndGeneralAmt>12216</ManagementAndGeneralAmt>
      </OfficeExpensesGrp>
      <OccupancyGrp>
        <TotalAmt>1848769</TotalAmt>
        <ProgramServicesAmt>1848340</ProgramServicesAmt>
        <ManagementAndGeneralAmt>429</ManagementAndGeneralAmt>
      </OccupancyGrp>
      <InterestGrp>
        <TotalAmt>777570</TotalAmt>
        <ProgramServicesAmt>777570</ProgramServicesAmt>
      </InterestGrp>
      <DepreciationDepletionGrp>
        <TotalAmt>747808</TotalAmt>
        <ProgramServicesAmt>747048</ProgramServicesAmt>
        <ManagementAndGeneralAmt>760</ManagementAndGeneralAmt>
      </DepreciationDepletionGrp>
      <InsuranceGrp>
        <TotalAmt>227041</TotalAmt>
        <ProgramServicesAmt>212689</ProgramServicesAmt>
        <ManagementAndGeneralAmt>14352</ManagementAndGeneralAmt>
      </InsuranceGrp>
      <OtherExpensesGrp>
        <Desc>REPAIRS &amp; MAINTENANCE</Desc>
        <TotalAmt>604687</TotalAmt>
        <ProgramServicesAmt>604687</ProgramServicesAmt>
      </OtherExpensesGrp>
      <OtherExpensesGrp>
        <Desc>BUILDING SECURITY</Desc>
        <TotalAmt>311133</TotalAmt>
        <ProgramServicesAmt>311133</ProgramServicesAmt>
      </OtherExpensesGrp>
      <OtherExpensesGrp>
        <Desc>INCUBATOR OPERATING EXP</Desc>
        <TotalAmt>69994</TotalAmt>
        <ProgramServicesAmt>69994</ProgramServicesAmt>
      </OtherExpensesGrp>
      <OtherExpensesGrp>
        <Desc>TELECOMMUNICATIONS</Desc>
        <TotalAmt>18208</TotalAmt>
        <ProgramServicesAmt>12253</ProgramServicesAmt>
        <ManagementAndGeneralAmt>5955</ManagementAndGeneralAmt>
      </OtherExpensesGrp>
      <TotalFunctionalExpensesGrp>
        <TotalAmt>5278184</TotalAmt>
        <ProgramServicesAmt>5125859</ProgramServicesAmt>
        <ManagementAndGeneralAmt>152325</ManagementAndGeneralAmt>
        <FundraisingAmt>0</FundraisingAmt>
      </TotalFunctionalExpensesGrp>
      <CashNonInterestBearingGrp>
        <BOYAmt>62316</BOYAmt>
        <EOYAmt>149462</EOYAmt>
      </CashNonInterestBearingGrp>
      <PledgesAndGrantsReceivableGrp>
        <EOYAmt>667911</EOYAmt>
      </PledgesAndGrantsReceivableGrp>
      <AccountsReceivableGrp>
        <BOYAmt>286743</BOYAmt>
        <EOYAmt>43350</EOYAmt>
      </AccountsReceivableGrp>
      <PrepaidExpensesDefrdChargesGrp>
        <BOYAmt>230209</BOYAmt>
        <EOYAmt>239251</EOYAmt>
      </PrepaidExpensesDefrdChargesGrp>
      <LandBldgEquipCostOrOtherBssAmt>31411188</LandBldgEquipCostOrOtherBssAmt>
      <LandBldgEquipAccumDeprecAmt>18078414</LandBldgEquipAccumDeprecAmt>
      <LandBldgEquipBasisNetGrp>
        <BOYAmt>11353163</BOYAmt>
        <EOYAmt>13332774</EOYAmt>
      </LandBldgEquipBasisNetGrp>
      <InvestmentsPubTradedSecGrp>
        <BOYAmt>509001</BOYAmt>
        <EOYAmt>693112</EOYAmt>
      </InvestmentsPubTradedSecGrp>
      <OtherAssetsTotalGrp>
        <BOYAmt>341588</BOYAmt>
        <EOYAmt>483250</EOYAmt>
      </OtherAssetsTotalGrp>
      <TotalAssetsGrp>
        <BOYAmt>12783020</BOYAmt>
        <EOYAmt>15609110</EOYAmt>
      </TotalAssetsGrp>
      <AccountsPayableAccrExpnssGrp>
        <BOYAmt>295009</BOYAmt>
        <EOYAmt>421200</EOYAmt>
      </AccountsPayableAccrExpnssGrp>
      <DeferredRevenueGrp>
        <BOYAmt>7400</BOYAmt>
        <EOYAmt>27566</EOYAmt>
      </DeferredRevenueGrp>
      <MortgNotesPyblScrdInvstPropGrp>
        <BOYAmt>14093358</BOYAmt>
        <EOYAmt>14019985</EOYAmt>
      </MortgNotesPyblScrdInvstPropGrp>
      <OtherLiabilitiesGrp>
        <BOYAmt>9343642</BOYAmt>
        <EOYAmt>10690908</EOYAmt>
      </OtherLiabilitiesGrp>
      <TotalLiabilitiesGrp>
        <BOYAmt>23739409</BOYAmt>
        <EOYAmt>25159659</EOYAmt>
      </TotalLiabilitiesGrp>
      <OrganizationFollowsFASB117Ind>X</OrganizationFollowsFASB117Ind>
      <NoDonorRestrictionNetAssetsGrp>
        <BOYAmt>-10956389</BOYAmt>
        <EOYAmt>-9550549</EOYAmt>
      </NoDonorRestrictionNetAssetsGrp>
      <TotalNetAssetsFundBalanceGrp>
        <BOYAmt>-10956389</BOYAmt>
        <EOYAmt>-9550549</EOYAmt>
      </TotalNetAssetsFundBalanceGrp>
      <TotLiabNetAssetsFundBalanceGrp>
        <BOYAmt>12783020</BOYAmt>
        <EOYAmt>15609110</EOYAmt>
      </TotLiabNetAssetsFundBalanceGrp>
      <ReconcilationRevenueExpnssAmt>1410184</ReconcilationRevenueExpnssAmt>
      <NetUnrlzdGainsLossesInvstAmt>-4344</NetUnrlzdGainsLossesInvstAmt>
      <OtherChangesInNetAssetsAmt>0</OtherChangesInNetAssetsAmt>
      <InfoInScheduleOPartXIIInd>X</InfoInScheduleOPartXIIInd>
      <MethodOfAccountingAccrualInd>X</MethodOfAccountingAccrualInd>
      <AccountantCompileOrReviewInd>0</AccountantCompileOrReviewInd>
      <FSAuditedInd>1</FSAuditedInd>
      <FSAuditedBasisGrp>
        <ConsolidatedBasisFinclStmtInd>X</ConsolidatedBasisFinclStmtInd>
      </FSAuditedBasisGrp>
      <AuditCommitteeInd>1</AuditCommitteeInd>
      <FederalGrantAuditRequiredInd>0</FederalGrantAuditRequiredInd>
    </IRS990>
    <IRS990ScheduleA documentId="RetDoc1039100001">
      <PubliclySupportedOrg509a2Ind>X</PubliclySupportedOrg509a2Ind>
      <GiftsGrantsContrisRcvd509Grp>
        <CurrentTaxYearMinus4YearsAmt>162472</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>28780</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearAmt>2569342</CurrentTaxYearAmt>
        <TotalAmt>2760594</TotalAmt>
      </GiftsGrantsContrisRcvd509Grp>
      <GrossReceiptsAdmissionsGrp>
        <CurrentTaxYearMinus4YearsAmt>3344714</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>3562877</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>3769919</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>3894497</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>3998737</CurrentTaxYearAmt>
        <TotalAmt>18570744</TotalAmt>
      </GrossReceiptsAdmissionsGrp>
      <Total509Grp>
        <CurrentTaxYearMinus4YearsAmt>3507186</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>3591657</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>3769919</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>3894497</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>6568079</CurrentTaxYearAmt>
        <TotalAmt>21331338</TotalAmt>
      </Total509Grp>
      <AmountsRcvdDsqlfyPersonGrp>
        <TotalAmt>0</TotalAmt>
      </AmountsRcvdDsqlfyPersonGrp>
      <SubstantialContributorsAmtGrp>
        <CurrentTaxYearMinus2YearsAmt>3161576</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>3474815</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>3266122</CurrentTaxYearAmt>
        <TotalAmt>9902513</TotalAmt>
      </SubstantialContributorsAmtGrp>
      <SubstAndDsqlfyPrsnsTotGrp>
        <CurrentTaxYearMinus2YearsAmt>3161576</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>3474815</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>3266122</CurrentTaxYearAmt>
        <TotalAmt>9902513</TotalAmt>
      </SubstAndDsqlfyPrsnsTotGrp>
      <PublicSupportTotal509Amt>11428825</PublicSupportTotal509Amt>
      <GrossInvestmentIncome509Grp>
        <CurrentTaxYearMinus4YearsAmt>3267</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>235</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>5594</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>23533</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>36979</CurrentTaxYearAmt>
        <TotalAmt>69608</TotalAmt>
      </GrossInvestmentIncome509Grp>
      <InvestmentIncomeAndUBTIGrp>
        <CurrentTaxYearMinus4YearsAmt>3267</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>235</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>5594</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>23533</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>36979</CurrentTaxYearAmt>
        <TotalAmt>69608</TotalAmt>
      </InvestmentIncomeAndUBTIGrp>
      <OtherIncome509Grp>
        <CurrentTaxYearMinus3YearsAmt>6500</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>70629</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>7393</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>83310</CurrentTaxYearAmt>
        <TotalAmt>167832</TotalAmt>
      </OtherIncome509Grp>
      <TotalSupportCalendarYearGrp>
        <CurrentTaxYearMinus4YearsAmt>3510453</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>3598392</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>3846142</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>3925423</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>6688368</CurrentTaxYearAmt>
        <TotalAmt>21568778</TotalAmt>
      </TotalSupportCalendarYearGrp>
      <PublicSupportCY509Pct>0.52990</PublicSupportCY509Pct>
      <PublicSupportPY509Pct>0.62650</PublicSupportPY509Pct>
      <InvestmentIncomeCYPct>0.00320</InvestmentIncomeCYPct>
      <InvestmentIncomePYPct>0.00230</InvestmentIncomePYPct>
      <ThirtyThrPctSuprtTestsCY509Ind>X</ThirtyThrPctSuprtTestsCY509Ind>
      <Form990ScheduleAPartVIGrp>
        <FormAndLineReferenceDesc>SCHEDULE A, PART III, LINE 12, EXPLANATION OF OTHER INCOME:</FormAndLineReferenceDesc>
        <ExplanationTxt>MISCELLANEOUS INCOME - 2021 AMOUNT: $ 6,500. 2022 AMOUNT: $ 70,629. 2023 AMOUNT: $ 7,393. 2024 AMOUNT: $ 83,310.</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>
    <IRS990ScheduleD documentId="RetDoc1040000001">
      <LandGrp>
        <OtherCostOrOtherBasisAmt>2738098</OtherCostOrOtherBasisAmt>
        <BookValueAmt>2738098</BookValueAmt>
      </LandGrp>
      <BuildingsGrp>
        <OtherCostOrOtherBasisAmt>22794752</OtherCostOrOtherBasisAmt>
        <DepreciationAmt>18003711</DepreciationAmt>
        <BookValueAmt>4791041</BookValueAmt>
      </BuildingsGrp>
      <LeaseholdImprovementsGrp>
        <OtherCostOrOtherBasisAmt>3324820</OtherCostOrOtherBasisAmt>
        <DepreciationAmt>58431</DepreciationAmt>
        <BookValueAmt>3266389</BookValueAmt>
      </LeaseholdImprovementsGrp>
      <EquipmentGrp>
        <OtherCostOrOtherBasisAmt>18843</OtherCostOrOtherBasisAmt>
        <DepreciationAmt>16272</DepreciationAmt>
        <BookValueAmt>2571</BookValueAmt>
      </EquipmentGrp>
      <OtherLandBuildingsGrp>
        <OtherCostOrOtherBasisAmt>2534675</OtherCostOrOtherBasisAmt>
        <BookValueAmt>2534675</BookValueAmt>
      </OtherLandBuildingsGrp>
      <TotalBookValueLandBuildingsAmt>13332774</TotalBookValueLandBuildingsAmt>
      <OtherLiabilitiesOrgGrp>
        <Desc>SECURITY DEPOSITS</Desc>
        <Amt>241707</Amt>
      </OtherLiabilitiesOrgGrp>
      <OtherLiabilitiesOrgGrp>
        <Desc>ACCRUED INTEREST</Desc>
        <Amt>9819604</Amt>
      </OtherLiabilitiesOrgGrp>
      <OtherLiabilitiesOrgGrp>
        <Desc>GRANT ACCRUED EXPENSES</Desc>
        <Amt>629597</Amt>
      </OtherLiabilitiesOrgGrp>
      <TotalLiabilityAmt>10690908</TotalLiabilityAmt>
      <FootnoteTextInd>X</FootnoteTextInd>
      <TotalRevEtcAuditedFinclStmtAmt>6734024</TotalRevEtcAuditedFinclStmtAmt>
      <NetUnrealizedGainsInvstAmt>-4344</NetUnrealizedGainsInvstAmt>
      <DonatedServicesAndUseFcltsAmt>50000</DonatedServicesAndUseFcltsAmt>
      <RevenueNotReportedAmt>45656</RevenueNotReportedAmt>
      <RevenueSubtotalAmt>6688368</RevenueSubtotalAmt>
      <RevenueNotReportedFinclStmtAmt>0</RevenueNotReportedFinclStmtAmt>
      <TotalRevenuePerForm990Amt>6688368</TotalRevenuePerForm990Amt>
      <TotExpnsEtcAuditedFinclStmtAmt>5328184</TotExpnsEtcAuditedFinclStmtAmt>
      <DonatedServicesUseFcltsAmt>50000</DonatedServicesUseFcltsAmt>
      <ExpensesNotReportedAmt>50000</ExpensesNotReportedAmt>
      <ExpensesSubtotalAmt>5278184</ExpensesSubtotalAmt>
      <ExpensesNotRptFinclStmtAmt>0</ExpensesNotRptFinclStmtAmt>
      <TotalExpensesPerForm990Amt>5278184</TotalExpensesPerForm990Amt>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART X, LINE 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE CORPORATION HAS BEEN RECOGNIZED BY THE INTERNAL REVENUE SERVICE AS A NOT-FOR-PROFIT CORPORATION AS DESCRIBED IN SECTION 501(C)(3) OF THE INTERNAL REVENUE CODE AND IS EXEMPT FROM FEDERAL INCOME TAXES ON RELATED INCOME PURSUANT TO SECTION 501(A) OF THE CODE. ACCOUNTING PRINCIPLES GENERALLY ACCEPTED IN THE UNITED STATES OF AMERICA REQUIRE MANAGEMENT TO EVALUATE TAX POSITIONS TAKEN AND RECOGNIZE A TAX LIABILITY (OR ASSET) IF THE ORGANIZATION HAS TAKEN AN UNCERTAIN POSITION THAT MORE LIKELY THAN NOT WOULD NOT BE SUSTAINED UPON EXAMINATION BY TAXING AUTHORITIES. MANAGEMENT HAS ANALYZED THE TAX POSITIONS TAKEN AND HAS CONCLUDED THAT AS OF DECEMBER 31, 2024, THERE ARE NO UNCERTAIN POSITIONS TAKEN OR EXPECTED TO BE TAKEN THAT WOULD REQUIRE RECOGNITION OF A LIABILITY (OR ASSET) OR DISCLOSURE IN THE FINANCIAL STATEMENTS. THE CORPORATION IS SUBJECT TO ROUTINE AUDITS BY TAXING JURISDICTIONS; HOWEVER, THERE ARE CURRENTLY NO AUDITS FOR ANY TAX PERIODS PENDING OR IN PROGRESS.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleD>
    <IRS990ScheduleL documentId="RetDoc1042800001">
      <BusTrInvolveInterestedPrsnGrp>
        <NameOfInterested>
          <PersonNm>DAVID SHARE</PersonNm>
        </NameOfInterested>
        <RelationshipDescriptionTxt>DIRECTOR OF SPDC AND VP OF ENVIRONMENTAL REMEDIATION AT OLIN CORP</RelationshipDescriptionTxt>
        <TransactionAmt>250000</TransactionAmt>
        <TransactionDesc>OLIN CORP IS RESPONSIBLE UNDER CT LAW FOR CERTAIN REMEDIATION ACTIVITIES ON SITES OWNED BY SCIENCE PARK DEVELOPMENT CORPORATION.</TransactionDesc>
        <SharingOfRevenuesInd>0</SharingOfRevenuesInd>
      </BusTrInvolveInterestedPrsnGrp>
      <BusTrInvolveInterestedPrsnGrp>
        <NameOfInterested>
          <PersonNm>MICHAEL PISCITELLI</PersonNm>
        </NameOfInterested>
        <RelationshipDescriptionTxt>DIRECTOR OF SPDC AND ECONOMIC DEVELOPMENT DIRECTOR CITY OF NEW HAVEN</RelationshipDescriptionTxt>
        <TransactionAmt>2531028</TransactionAmt>
        <TransactionDesc>SPDC IS A SUBGRANT RECIPIENT FROM THE CITY OF NEW HAVEN OF A DECD URBAN ACTION GRANT THROUGH THE STATE OF CONNECTICUT DEPARTMENT OF COMMUNITY AND ECONOMIC DEVELOPMENT</TransactionDesc>
        <SharingOfRevenuesInd>0</SharingOfRevenuesInd>
      </BusTrInvolveInterestedPrsnGrp>
    </IRS990ScheduleL>
    <IRS990ScheduleO documentId="RetDoc1044400001">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 11B</FormAndLineReferenceDesc>
        <ExplanationTxt>THE COMPLETE 990 IS PROVIDED THE BOARD OF DIRECTORS FOR REVIEW, DIGITALLY, BEFORE IT IS FILED. THE 990 IS NOT FILED UNTIL THE BOARD HAS CONDUCTED ITS REVIEW.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 12C</FormAndLineReferenceDesc>
        <ExplanationTxt>ALL OFFICERS, DIRECTORS AND KEY EMPLOYEES ARE REQUIRED TO DISCLOSE TO THE PRESIDENT ANNUALLY, BY THE DATE OF THE ANNUAL MEETING, INTERESTS THAT COULD GIVE RISE TO CONFLICTS. WHEN A CONFLICT OF INTEREST REQUIRES ACTION BY THE BOARD, THE PRESIDENT SHALL CALL IT TO THE ATTENTION OF THE BOARD.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 15</FormAndLineReferenceDesc>
        <ExplanationTxt>THE CORPORATION HAS ONE EMPLOYEE WHOSE COMPENSATION IS DETERMINED BY THE PRESIDENT, WHO RELIES ON HIS KNOWLEDGE OF THE MARKETPLACE FOR PEOPLE OF SIMILAR SKILLS AND RESPONSIBILITIES. THE SALARY IS ADJUSTED ANNUALLY AND APPROVED BY THE BOARD DURING THE BUDGET PROCESS. THE CHAIRMAN AND PRESIDENT'S COMPENSATION IS DETERMINED BY THE BOD WITH REFERENCE TO HIS KNOWLEDGE, EXPERIENCE AND LEVEL OF RESPONSIBILITY. THE CHAIRMAN'S COMPENSATION IS ALSO APPROVED ANNUALLY THROUGH THE BUDGET PROCESS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 18</FormAndLineReferenceDesc>
        <ExplanationTxt>THE CORPORATION'S ANNUAL FORM 990, INCLUDING FINANCIAL STATEMENTS AND CONFLICT OF INTEREST POLICY ARE AVAILABLE UPON REQUEST. THE ORGANIZATION'S CERTIFICATE OF ORGANIZATION AND BY-LAWS ARE AVAILABLE AT THE CONNECTICUT SECRETARY OF STATE'S OFFICES.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>THE CORPORATION'S ANNUAL FORM 990, INCLUDING FINANCIAL STATEMENTS AND CONFLICT OF INTEREST POLICY ARE AVAILABLE UPON REQUEST. THE ORGANIZATION'S CERTIFICATE OF ORGANIZATION AND BY-LAWS ARE AVAILABLE AT THE CONNECTICUT SECRETARY OF STATE'S OFFICES.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART XII, LINE 2C:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE PROCESS HAS NOT CHANGED FROM THE PRIOR YEAR.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
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      <IdDisregardedEntitiesGrp>
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          <AddressLine1Txt>5 SCIENCE PARK</AddressLine1Txt>
          <CityNm>NEW HAVEN</CityNm>
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        <EIN>680489628</EIN>
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        <TotalIncomeAmt>0</TotalIncomeAmt>
        <EndOfYearAssetsAmt>60362</EndOfYearAssetsAmt>
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    </IRS990ScheduleR>
  </ReturnData>
</Return>