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        <AverageHoursPerWeekRt>50.00</AverageHoursPerWeekRt>
        <HighestCompensatedEmployeeInd>X</HighestCompensatedEmployeeInd>
        <ReportableCompFromOrgAmt>118700</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>49537</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>KAY PINNER</PersonNm>
        <TitleTxt>DIRECTOR OF EDUCATION</TitleTxt>
        <AverageHoursPerWeekRt>45.00</AverageHoursPerWeekRt>
        <HighestCompensatedEmployeeInd>X</HighestCompensatedEmployeeInd>
        <ReportableCompFromOrgAmt>112230</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>16888</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>DANIEL WILLIAMS</PersonNm>
        <TitleTxt>DIRECTOR OF FACILITIES</TitleTxt>
        <AverageHoursPerWeekRt>45.00</AverageHoursPerWeekRt>
        <HighestCompensatedEmployeeInd>X</HighestCompensatedEmployeeInd>
        <ReportableCompFromOrgAmt>110649</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>15287</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>ELIZABETH DISCHERT</PersonNm>
        <TitleTxt>DIRECTOR OF MEETINGS &amp; SPONSORSHIPS</TitleTxt>
        <AverageHoursPerWeekRt>45.00</AverageHoursPerWeekRt>
        <HighestCompensatedEmployeeInd>X</HighestCompensatedEmployeeInd>
        <ReportableCompFromOrgAmt>107335</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>45124</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <TotalReportableCompFromOrgAmt>2494728</TotalReportableCompFromOrgAmt>
      <TotReportableCompRltdOrgAmt>0</TotReportableCompRltdOrgAmt>
      <TotalOtherCompensationAmt>363805</TotalOtherCompensationAmt>
      <IndivRcvdGreaterThan100KCnt>12</IndivRcvdGreaterThan100KCnt>
      <FormerOfcrEmployeesListedInd>0</FormerOfcrEmployeesListedInd>
      <TotalCompGreaterThan150KInd>1</TotalCompGreaterThan150KInd>
      <CompensationFromOtherSrcsInd>0</CompensationFromOtherSrcsInd>
      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>GOOGLE INC</BusinessNameLine1Txt>
          </BusinessName>
        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>1600 AMPITHEATRE PARKWAY</AddressLine1Txt>
            <CityNm>MOUNTAIN VIEW</CityNm>
            <StateAbbreviationCd>CA</StateAbbreviationCd>
            <ZIPCd>94043</ZIPCd>
          </USAddress>
        </ContractorAddress>
        <ServicesDesc>SOCIAL MEDIA</ServicesDesc>
        <CompensationAmt>2498623</CompensationAmt>
      </ContractorCompensationGrp>
      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>FACEBOOK</BusinessNameLine1Txt>
          </BusinessName>
        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>1 HACKER WAY</AddressLine1Txt>
            <CityNm>MENLO PARK</CityNm>
            <StateAbbreviationCd>CA</StateAbbreviationCd>
            <ZIPCd>94025</ZIPCd>
          </USAddress>
        </ContractorAddress>
        <ServicesDesc>SOCIAL MEDIA</ServicesDesc>
        <CompensationAmt>1818440</CompensationAmt>
      </ContractorCompensationGrp>
      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>AUSTIN 18 HOTEL LLC</BusinessNameLine1Txt>
          </BusinessName>
        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>10400 FERNWOOD ROAD</AddressLine1Txt>
            <CityNm>BETHESDA</CityNm>
            <StateAbbreviationCd>MD</StateAbbreviationCd>
            <ZIPCd>20817</ZIPCd>
          </USAddress>
        </ContractorAddress>
        <ServicesDesc>HOTEL</ServicesDesc>
        <CompensationAmt>493812</CompensationAmt>
      </ContractorCompensationGrp>
      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>FREEMAN</BusinessNameLine1Txt>
          </BusinessName>
        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>9260 W 55TH ST</AddressLine1Txt>
            <CityNm>MCCOOK</CityNm>
            <StateAbbreviationCd>IL</StateAbbreviationCd>
            <ZIPCd>605253654</ZIPCd>
          </USAddress>
        </ContractorAddress>
        <ServicesDesc>AUDIO VISUAL</ServicesDesc>
        <CompensationAmt>454744</CompensationAmt>
      </ContractorCompensationGrp>
      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>SNAP INC</BusinessNameLine1Txt>
          </BusinessName>
        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>2772 DONALD DOUGLAS LOOP NORTH</AddressLine1Txt>
            <CityNm>SANTA MONICA</CityNm>
            <StateAbbreviationCd>CA</StateAbbreviationCd>
            <ZIPCd>90406</ZIPCd>
          </USAddress>
        </ContractorAddress>
        <ServicesDesc>SOCIAL MEDIA</ServicesDesc>
        <CompensationAmt>345145</CompensationAmt>
      </ContractorCompensationGrp>
      <CntrctRcvdGreaterThan100KCnt>16</CntrctRcvdGreaterThan100KCnt>
      <AllOtherContributionsAmt>3480</AllOtherContributionsAmt>
      <TotalContributionsAmt>3480</TotalContributionsAmt>
      <ProgramServiceRevenueGrp>
        <Desc>MEMBERSHIP DUES AND FEES</Desc>
        <BusinessCd>541900</BusinessCd>
        <TotalRevenueColumnAmt>10000801</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>10000801</RelatedOrExemptFuncIncomeAmt>
      </ProgramServiceRevenueGrp>
      <ProgramServiceRevenueGrp>
        <Desc>EDUCATIONAL PROGRAMS</Desc>
        <BusinessCd>541900</BusinessCd>
        <TotalRevenueColumnAmt>463067</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>463067</RelatedOrExemptFuncIncomeAmt>
      </ProgramServiceRevenueGrp>
      <ProgramServiceRevenueGrp>
        <Desc>ANNUAL MEETINGS</Desc>
        <BusinessCd>541900</BusinessCd>
        <TotalRevenueColumnAmt>394651</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>394651</RelatedOrExemptFuncIncomeAmt>
      </ProgramServiceRevenueGrp>
      <ProgramServiceRevenueGrp>
        <Desc>PUBLICATIONS</Desc>
        <BusinessCd>541900</BusinessCd>
        <TotalRevenueColumnAmt>264598</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>264598</RelatedOrExemptFuncIncomeAmt>
      </ProgramServiceRevenueGrp>
      <ProgramServiceRevenueGrp>
        <Desc>AAO BULLETIN</Desc>
        <BusinessCd>541800</BusinessCd>
        <TotalRevenueColumnAmt>85925</TotalRevenueColumnAmt>
        <UnrelatedBusinessRevenueAmt>85925</UnrelatedBusinessRevenueAmt>
      </ProgramServiceRevenueGrp>
      <TotalProgramServiceRevenueAmt>11209042</TotalProgramServiceRevenueAmt>
      <InvestmentIncomeGrp>
        <TotalRevenueColumnAmt>624704</TotalRevenueColumnAmt>
        <ExclusionAmt>624704</ExclusionAmt>
      </InvestmentIncomeGrp>
      <RoyaltiesRevenueGrp>
        <TotalRevenueColumnAmt>976923</TotalRevenueColumnAmt>
        <ExclusionAmt>976923</ExclusionAmt>
      </RoyaltiesRevenueGrp>
      <GrossRentsGrp>
        <RealAmt>243827</RealAmt>
      </GrossRentsGrp>
      <LessRentalExpensesGrp>
        <RealAmt>257850</RealAmt>
      </LessRentalExpensesGrp>
      <RentalIncomeOrLossGrp>
        <RealAmt>-14023</RealAmt>
      </RentalIncomeOrLossGrp>
      <NetRentalIncomeOrLossGrp>
        <TotalRevenueColumnAmt>-14023</TotalRevenueColumnAmt>
        <ExclusionAmt>-14023</ExclusionAmt>
      </NetRentalIncomeOrLossGrp>
      <GrossAmountSalesAssetsGrp>
        <SecuritiesAmt>20155080</SecuritiesAmt>
      </GrossAmountSalesAssetsGrp>
      <LessCostOthBasisSalesExpnssGrp>
        <SecuritiesAmt>18260826</SecuritiesAmt>
      </LessCostOthBasisSalesExpnssGrp>
      <GainOrLossGrp>
        <SecuritiesAmt>1894254</SecuritiesAmt>
      </GainOrLossGrp>
      <NetGainOrLossInvestmentsGrp>
        <TotalRevenueColumnAmt>1894254</TotalRevenueColumnAmt>
        <ExclusionAmt>1894254</ExclusionAmt>
      </NetGainOrLossInvestmentsGrp>
      <GrossSalesOfInventoryAmt>256150</GrossSalesOfInventoryAmt>
      <CostOfGoodsSoldAmt>160451</CostOfGoodsSoldAmt>
      <NetIncomeOrLossGrp>
        <TotalRevenueColumnAmt>95699</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>11548</RelatedOrExemptFuncIncomeAmt>
        <UnrelatedBusinessRevenueAmt>84151</UnrelatedBusinessRevenueAmt>
      </NetIncomeOrLossGrp>
      <OtherRevenueMiscGrp>
        <Desc>OTHER REVENUE</Desc>
        <BusinessCd>900099</BusinessCd>
        <TotalRevenueColumnAmt>225930</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>225930</RelatedOrExemptFuncIncomeAmt>
      </OtherRevenueMiscGrp>
      <OtherRevenueTotalAmt>225930</OtherRevenueTotalAmt>
      <TotalRevenueGrp>
        <TotalRevenueColumnAmt>15016009</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>11360595</RelatedOrExemptFuncIncomeAmt>
        <UnrelatedBusinessRevenueAmt>170076</UnrelatedBusinessRevenueAmt>
        <ExclusionAmt>3481858</ExclusionAmt>
      </TotalRevenueGrp>
      <GrantsToDomesticOrgsGrp>
        <TotalAmt>6775</TotalAmt>
      </GrantsToDomesticOrgsGrp>
      <GrantsToDomesticIndividualsGrp>
        <TotalAmt>240000</TotalAmt>
      </GrantsToDomesticIndividualsGrp>
      <CompCurrentOfcrDirectorsGrp>
        <TotalAmt>2302634</TotalAmt>
      </CompCurrentOfcrDirectorsGrp>
      <OtherSalariesAndWagesGrp>
        <TotalAmt>2963175</TotalAmt>
      </OtherSalariesAndWagesGrp>
      <PensionPlanContributionsGrp>
        <TotalAmt>298774</TotalAmt>
      </PensionPlanContributionsGrp>
      <OtherEmployeeBenefitsGrp>
        <TotalAmt>576649</TotalAmt>
      </OtherEmployeeBenefitsGrp>
      <PayrollTaxesGrp>
        <TotalAmt>304946</TotalAmt>
      </PayrollTaxesGrp>
      <FeesForServicesLegalGrp>
        <TotalAmt>251122</TotalAmt>
      </FeesForServicesLegalGrp>
      <FeesForServicesAccountingGrp>
        <TotalAmt>29500</TotalAmt>
      </FeesForServicesAccountingGrp>
      <FeesForServicesLobbyingGrp>
        <TotalAmt>363500</TotalAmt>
      </FeesForServicesLobbyingGrp>
      <FeesForSrvcInvstMgmntFeesGrp>
        <TotalAmt>66809</TotalAmt>
      </FeesForSrvcInvstMgmntFeesGrp>
      <FeesForServicesOtherGrp>
        <TotalAmt>622931</TotalAmt>
      </FeesForServicesOtherGrp>
      <AdvertisingGrp>
        <TotalAmt>23384</TotalAmt>
      </AdvertisingGrp>
      <OfficeExpensesGrp>
        <TotalAmt>155366</TotalAmt>
      </OfficeExpensesGrp>
      <InformationTechnologyGrp>
        <TotalAmt>593595</TotalAmt>
      </InformationTechnologyGrp>
      <OccupancyGrp>
        <TotalAmt>204399</TotalAmt>
      </OccupancyGrp>
      <TravelGrp>
        <TotalAmt>169470</TotalAmt>
      </TravelGrp>
      <ConferencesMeetingsGrp>
        <TotalAmt>458698</TotalAmt>
      </ConferencesMeetingsGrp>
      <InterestGrp>
        <TotalAmt>3563</TotalAmt>
      </InterestGrp>
      <DepreciationDepletionGrp>
        <TotalAmt>289261</TotalAmt>
      </DepreciationDepletionGrp>
      <InsuranceGrp>
        <TotalAmt>209712</TotalAmt>
      </InsuranceGrp>
      <OtherExpensesGrp>
        <Desc>CONSUMER ED. CAMPAIGN</Desc>
        <TotalAmt>5022836</TotalAmt>
      </OtherExpensesGrp>
      <OtherExpensesGrp>
        <Desc>MEMBER COMMUNICATIONS</Desc>
        <TotalAmt>745186</TotalAmt>
      </OtherExpensesGrp>
      <OtherExpensesGrp>
        <Desc>BANK AND CREDIT CARD FE</Desc>
        <TotalAmt>311119</TotalAmt>
      </OtherExpensesGrp>
      <OtherExpensesGrp>
        <Desc>HONORARIA AND SPEAKER F</Desc>
        <TotalAmt>17471</TotalAmt>
      </OtherExpensesGrp>
      <AllOtherExpensesGrp>
        <TotalAmt>172394</TotalAmt>
      </AllOtherExpensesGrp>
      <TotalFunctionalExpensesGrp>
        <TotalAmt>16403269</TotalAmt>
      </TotalFunctionalExpensesGrp>
      <CashNonInterestBearingGrp>
        <BOYAmt>372816</BOYAmt>
        <EOYAmt>1247077</EOYAmt>
      </CashNonInterestBearingGrp>
      <SavingsAndTempCashInvstGrp>
        <BOYAmt>425434</BOYAmt>
        <EOYAmt>278921</EOYAmt>
      </SavingsAndTempCashInvstGrp>
      <AccountsReceivableGrp>
        <BOYAmt>550578</BOYAmt>
        <EOYAmt>624908</EOYAmt>
      </AccountsReceivableGrp>
      <InventoriesForSaleOrUseGrp>
        <BOYAmt>79634</BOYAmt>
        <EOYAmt>67156</EOYAmt>
      </InventoriesForSaleOrUseGrp>
      <PrepaidExpensesDefrdChargesGrp>
        <BOYAmt>782209</BOYAmt>
        <EOYAmt>1288398</EOYAmt>
      </PrepaidExpensesDefrdChargesGrp>
      <LandBldgEquipCostOrOtherBssAmt>9979764</LandBldgEquipCostOrOtherBssAmt>
      <LandBldgEquipAccumDeprecAmt>5782569</LandBldgEquipAccumDeprecAmt>
      <LandBldgEquipBasisNetGrp>
        <BOYAmt>4146008</BOYAmt>
        <EOYAmt>4197195</EOYAmt>
      </LandBldgEquipBasisNetGrp>
      <InvestmentsPubTradedSecGrp>
        <BOYAmt>27792310</BOYAmt>
        <EOYAmt>29497951</EOYAmt>
      </InvestmentsPubTradedSecGrp>
      <InvestmentsOtherSecuritiesGrp>
        <BOYAmt>337644</BOYAmt>
        <EOYAmt>462643</EOYAmt>
      </InvestmentsOtherSecuritiesGrp>
      <OtherAssetsTotalGrp>
        <BOYAmt>108983</BOYAmt>
        <EOYAmt>106185</EOYAmt>
      </OtherAssetsTotalGrp>
      <TotalAssetsGrp>
        <BOYAmt>34595616</BOYAmt>
        <EOYAmt>37770434</EOYAmt>
      </TotalAssetsGrp>
      <AccountsPayableAccrExpnssGrp>
        <BOYAmt>1200782</BOYAmt>
        <EOYAmt>2065213</EOYAmt>
      </AccountsPayableAccrExpnssGrp>
      <DeferredRevenueGrp>
        <BOYAmt>640326</BOYAmt>
        <EOYAmt>1821544</EOYAmt>
      </DeferredRevenueGrp>
      <MortgNotesPyblScrdInvstPropGrp>
        <BOYAmt>2500000</BOYAmt>
        <EOYAmt>908685</EOYAmt>
      </MortgNotesPyblScrdInvstPropGrp>
      <TotalLiabilitiesGrp>
        <BOYAmt>4341108</BOYAmt>
        <EOYAmt>4795442</EOYAmt>
      </TotalLiabilitiesGrp>
      <OrganizationFollowsFASB117Ind>X</OrganizationFollowsFASB117Ind>
      <NoDonorRestrictionNetAssetsGrp>
        <BOYAmt>30166614</BOYAmt>
        <EOYAmt>32883855</EOYAmt>
      </NoDonorRestrictionNetAssetsGrp>
      <DonorRestrictionNetAssetsGrp>
        <BOYAmt>87894</BOYAmt>
        <EOYAmt>91137</EOYAmt>
      </DonorRestrictionNetAssetsGrp>
      <TotalNetAssetsFundBalanceGrp>
        <BOYAmt>30254508</BOYAmt>
        <EOYAmt>32974992</EOYAmt>
      </TotalNetAssetsFundBalanceGrp>
      <TotLiabNetAssetsFundBalanceGrp>
        <BOYAmt>34595616</BOYAmt>
        <EOYAmt>37770434</EOYAmt>
      </TotLiabNetAssetsFundBalanceGrp>
      <ReconcilationRevenueExpnssAmt>-1387260</ReconcilationRevenueExpnssAmt>
      <NetUnrlzdGainsLossesInvstAmt>4107744</NetUnrlzdGainsLossesInvstAmt>
      <OtherChangesInNetAssetsAmt>0</OtherChangesInNetAssetsAmt>
      <MethodOfAccountingAccrualInd>X</MethodOfAccountingAccrualInd>
      <AccountantCompileOrReviewInd>0</AccountantCompileOrReviewInd>
      <FSAuditedInd>1</FSAuditedInd>
      <FSAuditedBasisGrp>
        <ConsolidatedBasisFinclStmtInd>X</ConsolidatedBasisFinclStmtInd>
      </FSAuditedBasisGrp>
      <AuditCommitteeInd>1</AuditCommitteeInd>
      <FederalGrantAuditRequiredInd>0</FederalGrantAuditRequiredInd>
    </IRS990>
    <IRS990ScheduleC documentId="RetDoc1039700001">
      <SubstantiallyAllDuesNondedInd>0</SubstantiallyAllDuesNondedInd>
      <OnlyInHouseLobbyingInd>0</OnlyInHouseLobbyingInd>
      <AgreeCarryoverPriorYearInd>1</AgreeCarryoverPriorYearInd>
      <DuesAssessmentsAmt>9941346</DuesAssessmentsAmt>
      <NonDeductibleLbbyngPltclCYAmt>422104</NonDeductibleLbbyngPltclCYAmt>
      <NonDedLbbyngPltclCyovAmt>164301</NonDedLbbyngPltclCyovAmt>
      <NonDeductibleLbbyngPltclTotAmt>586405</NonDeductibleLbbyngPltclTotAmt>
      <AggregateReportedDuesNtcAmt>914585</AggregateReportedDuesNtcAmt>
      <TaxableAmt>-328180</TaxableAmt>
    </IRS990ScheduleC>
    <IRS990ScheduleD documentId="RetDoc1040000001">
      <CYEndwmtFundGrp>
        <BeginningYearBalanceAmt>87894</BeginningYearBalanceAmt>
        <InvestmentEarningsOrLossesAmt>3243</InvestmentEarningsOrLossesAmt>
        <OtherExpendituresAmt>2266</OtherExpendituresAmt>
        <EndYearBalanceAmt>88871</EndYearBalanceAmt>
      </CYEndwmtFundGrp>
      <CYMinus1YrEndwmtFundGrp>
        <BeginningYearBalanceAmt>82987</BeginningYearBalanceAmt>
        <InvestmentEarningsOrLossesAmt>5092</InvestmentEarningsOrLossesAmt>
        <OtherExpendituresAmt>185</OtherExpendituresAmt>
        <EndYearBalanceAmt>87894</EndYearBalanceAmt>
      </CYMinus1YrEndwmtFundGrp>
      <CYMinus2YrEndwmtFundGrp>
        <BeginningYearBalanceAmt>82357</BeginningYearBalanceAmt>
        <InvestmentEarningsOrLossesAmt>4190</InvestmentEarningsOrLossesAmt>
        <OtherExpendituresAmt>3560</OtherExpendituresAmt>
        <EndYearBalanceAmt>82987</EndYearBalanceAmt>
      </CYMinus2YrEndwmtFundGrp>
      <CYMinus3YrEndwmtFundGrp>
        <BeginningYearBalanceAmt>86096</BeginningYearBalanceAmt>
        <InvestmentEarningsOrLossesAmt>261</InvestmentEarningsOrLossesAmt>
        <OtherExpendituresAmt>4000</OtherExpendituresAmt>
        <EndYearBalanceAmt>82357</EndYearBalanceAmt>
      </CYMinus3YrEndwmtFundGrp>
      <CYMinus4YrEndwmtFundGrp>
        <BeginningYearBalanceAmt>86398</BeginningYearBalanceAmt>
        <InvestmentEarningsOrLossesAmt>4191</InvestmentEarningsOrLossesAmt>
        <OtherExpendituresAmt>4493</OtherExpendituresAmt>
        <EndYearBalanceAmt>86096</EndYearBalanceAmt>
      </CYMinus4YrEndwmtFundGrp>
      <PrmnntEndowmentBalanceEOYPct>0.76510</PrmnntEndowmentBalanceEOYPct>
      <TermEndowmentBalanceEOYPct>0.23490</TermEndowmentBalanceEOYPct>
      <EndowmentsHeldUnrelatedOrgInd>0</EndowmentsHeldUnrelatedOrgInd>
      <EndowmentsHeldRelatedOrgInd>0</EndowmentsHeldRelatedOrgInd>
      <LandGrp>
        <OtherCostOrOtherBasisAmt>684000</OtherCostOrOtherBasisAmt>
        <BookValueAmt>684000</BookValueAmt>
      </LandGrp>
      <BuildingsGrp>
        <OtherCostOrOtherBasisAmt>6902015</OtherCostOrOtherBasisAmt>
        <DepreciationAmt>4263250</DepreciationAmt>
        <BookValueAmt>2638765</BookValueAmt>
      </BuildingsGrp>
      <LeaseholdImprovementsGrp>
        <OtherCostOrOtherBasisAmt>157157</OtherCostOrOtherBasisAmt>
        <DepreciationAmt>73550</DepreciationAmt>
        <BookValueAmt>83607</BookValueAmt>
      </LeaseholdImprovementsGrp>
      <EquipmentGrp>
        <OtherCostOrOtherBasisAmt>952761</OtherCostOrOtherBasisAmt>
        <DepreciationAmt>726430</DepreciationAmt>
        <BookValueAmt>226331</BookValueAmt>
      </EquipmentGrp>
      <OtherLandBuildingsGrp>
        <OtherCostOrOtherBasisAmt>1283831</OtherCostOrOtherBasisAmt>
        <DepreciationAmt>719339</DepreciationAmt>
        <BookValueAmt>564492</BookValueAmt>
      </OtherLandBuildingsGrp>
      <TotalBookValueLandBuildingsAmt>4197195</TotalBookValueLandBuildingsAmt>
      <FootnoteTextInd>X</FootnoteTextInd>
      <TotalRevEtcAuditedFinclStmtAmt>19475245</TotalRevEtcAuditedFinclStmtAmt>
      <NetUnrealizedGainsInvstAmt>4107744</NetUnrealizedGainsInvstAmt>
      <RevenueNotReportedAmt>4107744</RevenueNotReportedAmt>
      <RevenueSubtotalAmt>15367501</RevenueSubtotalAmt>
      <InvestmentExpensesNotIncldAmt>66809</InvestmentExpensesNotIncldAmt>
      <OtherRevenuesNotIncludedAmt>-418301</OtherRevenuesNotIncludedAmt>
      <RevenueNotReportedFinclStmtAmt>-351492</RevenueNotReportedFinclStmtAmt>
      <TotalRevenuePerForm990Amt>15016009</TotalRevenuePerForm990Amt>
      <TotExpnsEtcAuditedFinclStmtAmt>16754761</TotExpnsEtcAuditedFinclStmtAmt>
      <OtherExpensesIncludedAmt>418301</OtherExpensesIncludedAmt>
      <ExpensesNotReportedAmt>418301</ExpensesNotReportedAmt>
      <ExpensesSubtotalAmt>16336460</ExpensesSubtotalAmt>
      <InvestmentExpensesNotIncld2Amt>66809</InvestmentExpensesNotIncld2Amt>
      <ExpensesNotRptFinclStmtAmt>66809</ExpensesNotRptFinclStmtAmt>
      <TotalExpensesPerForm990Amt>16403269</TotalExpensesPerForm990Amt>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART V, LINE 4:</FormAndLineReferenceDesc>
        <ExplanationTxt>INCOME IS APPLIED TOWARD THE EXPENSES AND HONORARIUM FOR THE MERSHON LECTURE PRESENTED AT THE ANNUAL SESSION.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART X, LINE 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>AAO IS EXEMPT FROM FEDERAL INCOME TAXES UNDER SECTION 501(C)(6) OF THE INTERNAL REVENUE CODE (THE "CODE"), EXCEPT ON NET INCOME DERIVED FROM UNRELATED BUSINESS ACTIVITIES AS DEFINED IN THE CODE. ACCORDINGLY, AAO FILES AS A TAX EXEMPT ORGANIZATION. AAOSI IS A FOR-PROFIT SUBSIDIARY AND FILES A SEPARATE INCOME TAX RETURN. INCOME TAXES ARE PROVIDED FOR THE TAX EFFECTS OF THE TRANSACTIONS OF AAOSI AS REPORTED IN THESE CONSOLIDATED FINANCIAL STATEMENTS. PAC CONSTITUTES A POLITICAL ORGANIZATION UNDER SECTION 527(F)(3) OF THE INTERNAL REVENUE CODE, AND IS, THEREFORE, SUBJECT TO INCOME TAX ON TAXABLE INCOME. FOR THESE PURPOSES, CAMPAIGN CONTRIBUTIONS ARE NOT INCLUDIBLE AND EXPENDITURES FOR CAMPAIGN PURPOSES ARE NOT DEDUCTIBLE IN DETERMINING TAXABLE INCOME. DRF IS EXEMPT FROM FEDERAL INCOME TAXES UNDER SECTION 501(C)(3) OF THE CODE, EXCEPT ON NET INCOME DERIVED FROM UNRELATED BUSINESS ACTIVITIES AS DEFINED IN THE CODE. ACCORDINGLY, DRF FILES AS A TAX EXEMPT ORGANIZATION. DOS IS EXEMPT FROM FEDERAL INCOME TAXES UNDER SECTION 501(C)(3) OF THE CODE, EXCEPT ON NET INCOME DERIVED FROM UNRELATED BUSINESS ACTIVITIES AS DEFINED IN THE CODE. ACCORDINGLY, DOS FILES AS A TAX EXEMPT ORGANIZATION. AS DISCUSSED IN NOTE 1 OF THE CONSOLIDATED AUDIT, DRF AND DOS WERE DISSOLVED IN 2020. THE ASSOCIATION IS REQUIRED TO EVALUATE TAX POSITIONS TAKEN (OR EXPECTED TO BE TAKEN) IN THE COURSE OF PREPARING THE ASSOCIATION'S TAX RETURNS AND RECOGNIZE A TAX LIABILITY IF THE ASSOCIATION HAS TAKEN AN UNCERTAIN TAX POSITION THAT MORE LIKELY THAN NOT WOULD NOT BE SUSTAINED UPON EXAMINATION BY THE APPLICABLE TAXING AUTHORITIES. THE ASSOCIATION HAS ANALYZED THE TAX POSITIONS TAKEN AND HAS CONCLUDED THAT AS OF MAY 31, 2021, THERE ARE NO UNCERTAIN TAX POSITIONS TAKEN, OR EXPECTED TO BE TAKEN, THAT WOULD REQUIRE RECOGNITION OF A LIABILITY OR DISCLOSURE IN THE CONSOLIDATED FINANCIAL STATEMENTS. IF APPLICABLE, THE ASSOCIATION RECOGNIZES INTEREST AND PENALTIES RELATED TO UNRECOGNIZED TAX LIABILITIES IN THE CONSOLIDATED STATEMENTS OF INCOME. THE ASSOCIATION FOLLOWS GUIDANCE ISSUED BY THE FASB ON ACCOUNTING FOR INCOME TAXES AND HAS EVALUATED ITS TAX POSITIONS, EXPIRING STATUTES OF LIMITATIONS, AUDITS, PROPOSED SETTLEMENTS, CHANGES IN TAX LAW AND NEW AUTHORITATIVE RULINGS, AND BELIEVES THAT NO PROVISION FOR INCOME TAXES IS NECESSARY TO COVER ANY UNCERTAIN TAX POSITIONS. THE ASSOCIATION'S RETURNS FOR TAX YEARS 2018 AND LATER REMAIN SUBJECT TO EXAMINATION BY TAXING AUTHORITIES.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART XI, LINE 4B - OTHER ADJUSTMENTS:</FormAndLineReferenceDesc>
        <ExplanationTxt>RENTAL EXPENSES -257,850. COST OF GOODS SOLD -160,451.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART XII, LINE 2D - OTHER ADJUSTMENTS:</FormAndLineReferenceDesc>
        <ExplanationTxt>RENTAL EXPENSES 257,850. COST OF GOODS SOLD 160,451.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleD>
    <IRS990ScheduleI documentId="RetDoc1041900001">
      <GrantRecordsMaintainedInd>1</GrantRecordsMaintainedInd>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>FACULTY FELLOWSHIP</GrantTypeTxt>
        <RecipientCnt>7</RecipientCnt>
        <CashGrantAmt>210000</CashGrantAmt>
      </GrantsOtherAsstToIndivInUSGrp>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>CRANIOFACIAL ORTHODONTIC FELLOWSHIP</GrantTypeTxt>
        <RecipientCnt>1</RecipientCnt>
        <CashGrantAmt>30000</CashGrantAmt>
      </GrantsOtherAsstToIndivInUSGrp>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART I, LINE 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE AMERICAN ASSOCIATION OF ORTHODONTISTS PROVIDES SPONSORSHIPS AND SIMILAR FUNDING TO ESTABLISHED PROGRAMS AND ORGANIZATIONS.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleI>
    <IRS990ScheduleJ documentId="RetDoc1042400001">
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      <TravelForCompanionsInd>X</TravelForCompanionsInd>
      <IdemnificationGrossUpPmtsInd>X</IdemnificationGrossUpPmtsInd>
      <ClubDuesOrFeesInd>X</ClubDuesOrFeesInd>
      <WrittenPolicyRefTAndEExpnssInd>1</WrittenPolicyRefTAndEExpnssInd>
      <SubstantiationRequiredInd>1</SubstantiationRequiredInd>
      <IndependentConsultantInd>X</IndependentConsultantInd>
      <CompensationSurveyInd>X</CompensationSurveyInd>
      <BoardOrCommitteeApprovalInd>X</BoardOrCommitteeApprovalInd>
      <SeverancePaymentInd>1</SeverancePaymentInd>
      <SupplementalNonqualRtrPlanInd>0</SupplementalNonqualRtrPlanInd>
      <EquityBasedCompArrngmInd>0</EquityBasedCompArrngmInd>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>LYNNE THOMAS GORDON</PersonNm>
        <TitleTxt>CHIEF EXECUTIVE OFFICER</TitleTxt>
        <BaseCompensationFilingOrgAmt>407567</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>30900</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>22800</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>10010</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>471277</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>CASANDRA SCALES</PersonNm>
        <TitleTxt>VP OF FINANCE &amp; ADMINISTRA</TitleTxt>
        <BaseCompensationFilingOrgAmt>206284</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>17113</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>47763</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>271160</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>MLINDA BROTHERS</PersonNm>
        <TitleTxt>VP OF GROWTH &amp; TRANSFORMAT</TitleTxt>
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        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>15020</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>29638</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>230176</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>ROBERT KENT</PersonNm>
        <TitleTxt>VP OF ADVOCACY AND GENERAL COUNSEL (</TitleTxt>
        <BaseCompensationFilingOrgAmt>161827</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>7909</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>30573</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>200309</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>AIMEE SNYDER-JACKSON</PersonNm>
        <TitleTxt>VP OF HR AND GOVERNANCE</TitleTxt>
        <BaseCompensationFilingOrgAmt>160286</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>13116</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>21242</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>194644</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
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      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>ALAN BAUM</PersonNm>
        <TitleTxt>DIRECTOR OF INFORMATION TECHNOLOGY</TitleTxt>
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        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>11471</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>10314</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>169905</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>PAUL LAWRENCE</PersonNm>
        <TitleTxt>ASSOCIATE GENERAL COUNSEL</TitleTxt>
        <BaseCompensationFilingOrgAmt>118700</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>7053</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>42484</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>168237</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
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      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>ELIZABETH DISCHERT</PersonNm>
        <TitleTxt>DIRECTOR OF MEETINGS &amp; SPONSORSHIPS</TitleTxt>
        <BaseCompensationFilingOrgAmt>107335</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>9096</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>36028</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>152459</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
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        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART I, LINE 1A</FormAndLineReferenceDesc>
        <ExplanationTxt>BOARD MEMBERS AND OFFICERS MAY BE REIMBURSED FOR THE TRAVEL OF A SPOUSE OR GUEST TO MEETINGS SPECIFIED IN THE POLICY. GENERALLY, BOARD AND COMMITTEE MEETINGS ARE NOT ELIGIBLE FOR REIMBURSEMENT OF COMPANION TRAVEL. FOR SPECIFIED MEETINGS INVOLVING FLIGHTS OVER 2 HOURS, OFFICERS MAY BE REIMBURSED FOR THE NEXT CLASS ABOVE COACH SUBJECT TO THE WRITTEN TRAVEL POLICY.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART I, LINE 4A</FormAndLineReferenceDesc>
        <ExplanationTxt>DANIEL WILLIAMS RECEIVED A SEVERANCE PAYMENT OF $20,470.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleJ>
    <IRS990ScheduleO documentId="RetDoc1044400001">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 1</FormAndLineReferenceDesc>
        <ExplanationTxt>THE EXECUTIVE COMMITTEE IS COMPOSED OF FIVE MEMBERS: THE PRESIDENT, THE PRESIDENT-ELECT, THE SECRETARY-TREASURER, AND THE TWO MOST SENIOR TRUSTEES. THIS COMMITTEE SHALL HAVE THE POWER TO ACT FOR THE FULL BOARD OF TRUSTEES IN THE INTERIM BETWEEN SESSIONS OF THE BOARD, AND IT SHALL REPORT SUCH ACTIONS TO THE BOARD AT ITS NEXT MEETING.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 6</FormAndLineReferenceDesc>
        <ExplanationTxt>AAO HAS A TOTAL OF 18,132 MEMBERS (INCLUDING APPROXIMATELY 2,800 INTERNATIONAL MEMBERS)</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 7A</FormAndLineReferenceDesc>
        <ExplanationTxt>THE HOUSE OF DELEGATES AND THE BOARD OF TRUSTEES ARE CHOSEN BY MEMBERS OF THE AAO CONSTITUENT ORGANIZATIONS. MEMBERS OF THE CONSTITUENT ORGANIZATIONS ARE ALSO MEMBERS OF THE AAO.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 11B</FormAndLineReferenceDesc>
        <ExplanationTxt>FORM 990 IS PREPARED BY OUTSIDE ACCOUNTANTS, BASED UPON INFORMATION PROVIDED BY AAO. THE FORM 990 IS REVIEWED BY THE ACCOUNTING MANAGER AND THE VP OF FINANCE. THE 990 IS PROVIDED TO THE BOARD OF TRUSTEES BEFORE FILING.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 12C</FormAndLineReferenceDesc>
        <ExplanationTxt>ANNUALLY, ALL BOARD MEMBERS SIGN A CONFLICT OF INTEREST POLICY ACKNOWLEDGEMENT, WHICH ASKS THEM TO LIST ANY POTENTIAL CONFLICT. ALL DISCLOSED CONFLICTS ARE EXAMINED BY THE APPROPRIATE PERSON. IN ADDITION, EACH BOARD MEETING INCLUDES INQUIRY AS TO WHETHER THERE ARE ANY POTENTIAL CONFLICTS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 15</FormAndLineReferenceDesc>
        <ExplanationTxt>COAC (CENTRAL OFFICE ADVISORY COMMITTEE) MADE UP OF VOTING MEMBERS OF THE BOT (BOARD OF TRUSTEES) DETERMINES THE CHIEF EXECUTIVE OFFICER'S COMPENSATION. THEY DO A WRITTEN EVALUATION BASED ON A BOARD SOURCE EXECUTIVE DIRECTOR/CHIEF STAFF FORM. INFORMATION FROM SALARY SURVEYS BY ASAE, THE QUATT SURVEY AND ASSOCIATION FORUM BENCHMARKING ARE PROVIDED TO THE COAC. FOR COMPENSATION OTHER THAN THE CHIEF EXECUTIVE OFFICER, THE INDEPENDENT SOURCE (AAIMS) IS USED.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>SUMMARY FINANCIAL STATEMENTS ARE PUBLISHED ON THE AAO MEMBERS' WEBSITE. BYLAWS AND ALL POLICIES ARE AVAILABLE UPON REQUEST AND ARE POSTED ON THE AAO MEMBERS' WEBSITE. FINANCIAL INFORMATION IS UPDATED WITH D&amp;B ANNUALLY.</ExplanationTxt>
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          <BusinessNameLine1Txt>AAO DISASTER RELIEF FUND</BusinessNameLine1Txt>
        </DisregardedEntityName>
        <USAddress>
          <AddressLine1Txt>401 N LINDBERGH BLVD</AddressLine1Txt>
          <CityNm>ST LOUIS</CityNm>
          <StateAbbreviationCd>MO</StateAbbreviationCd>
          <ZIPCd>63141</ZIPCd>
        </USAddress>
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        <ExemptCodeSectionTxt>501(C)(3)</ExemptCodeSectionTxt>
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      <IdRelatedTaxExemptOrgGrp>
        <DisregardedEntityName>
          <BusinessNameLine1Txt>AAO DONATED ORTHODONTIC SERVICES</BusinessNameLine1Txt>
        </DisregardedEntityName>
        <USAddress>
          <AddressLine1Txt>401 N LINDBERGH BLVD</AddressLine1Txt>
          <CityNm>ST LOUIS</CityNm>
          <StateAbbreviationCd>MO</StateAbbreviationCd>
          <ZIPCd>63141</ZIPCd>
        </USAddress>
        <EIN>465292569</EIN>
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        <PublicCharityStatusTxt>LINE 7</PublicCharityStatusTxt>
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      <IdRelatedTaxExemptOrgGrp>
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          <BusinessNameLine1Txt>AAO POLITICAL ACTION COMMITTEE</BusinessNameLine1Txt>
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          <AddressLine1Txt>401 N LINDBERGH BLVD</AddressLine1Txt>
          <CityNm>ST LOUIS</CityNm>
          <StateAbbreviationCd>MO</StateAbbreviationCd>
          <ZIPCd>63141</ZIPCd>
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        <PrimaryActivitiesTxt>SUPPORT CANDIDATES FOR ELECTION TO LEGISLATIVE AND EXECUTIVE OFFICE</PrimaryActivitiesTxt>
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          <AddressLine1Txt>401 N LINDBERGH BLVD</AddressLine1Txt>
          <CityNm>ST LOUIS</CityNm>
          <StateAbbreviationCd>MO</StateAbbreviationCd>
          <ZIPCd>63141</ZIPCd>
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        <PrimaryActivitiesTxt>INSURANCE</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>MO</LegalDomicileStateCd>
        <DirectControllingEntityName>
          <BusinessNameLine1Txt>AAO</BusinessNameLine1Txt>
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        <ShareOfEOYAssetsAmt>1421884</ShareOfEOYAssetsAmt>
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      <GiftGrntCapContriFromOthOrgInd>0</GiftGrntCapContriFromOthOrgInd>
      <LoansOrGuaranteesToOtherOrgInd>0</LoansOrGuaranteesToOtherOrgInd>
      <LoansOrGuaranteesFromOthOrgInd>0</LoansOrGuaranteesFromOthOrgInd>
      <DivRelatedOrganizationInd>0</DivRelatedOrganizationInd>
      <AssetSaleToOtherOrgInd>0</AssetSaleToOtherOrgInd>
      <AssetPurchaseFromOtherOrgInd>0</AssetPurchaseFromOtherOrgInd>
      <AssetExchangeInd>0</AssetExchangeInd>
      <RentalOfFacilitiesToOthOrgInd>0</RentalOfFacilitiesToOthOrgInd>
      <RentalOfFcltsFromOthOrgInd>0</RentalOfFcltsFromOthOrgInd>
      <PerformOfServicesForOthOrgInd>0</PerformOfServicesForOthOrgInd>
      <PerformOfServicesByOtherOrgInd>0</PerformOfServicesByOtherOrgInd>
      <SharingOfFacilitiesInd>1</SharingOfFacilitiesInd>
      <PaidEmployeesSharingInd>1</PaidEmployeesSharingInd>
      <ReimbursementPaidToOtherOrgInd>0</ReimbursementPaidToOtherOrgInd>
      <ReimbursementPaidByOtherOrgInd>1</ReimbursementPaidByOtherOrgInd>
      <TransferToOtherOrgInd>0</TransferToOtherOrgInd>
      <TransferFromOtherOrgInd>0</TransferFromOtherOrgInd>
      <TransactionsRelatedOrgGrp>
        <OtherOrganizationName>
          <BusinessNameLine1Txt>AAO SERVICES INC</BusinessNameLine1Txt>
        </OtherOrganizationName>
        <TransactionTypeTxt>A</TransactionTypeTxt>
        <InvolvedAmt>82500</InvolvedAmt>
        <MethodOfAmountDeterminationTxt>CASH</MethodOfAmountDeterminationTxt>
      </TransactionsRelatedOrgGrp>
      <TransactionsRelatedOrgGrp>
        <OtherOrganizationName>
          <BusinessNameLine1Txt>AAO SERVICES INC</BusinessNameLine1Txt>
        </OtherOrganizationName>
        <TransactionTypeTxt>N</TransactionTypeTxt>
        <InvolvedAmt>135597</InvolvedAmt>
        <MethodOfAmountDeterminationTxt>CASH</MethodOfAmountDeterminationTxt>
      </TransactionsRelatedOrgGrp>
      <TransactionsRelatedOrgGrp>
        <OtherOrganizationName>
          <BusinessNameLine1Txt>AAO SERVICES INC</BusinessNameLine1Txt>
        </OtherOrganizationName>
        <TransactionTypeTxt>O</TransactionTypeTxt>
        <InvolvedAmt>149883</InvolvedAmt>
        <MethodOfAmountDeterminationTxt>CASH</MethodOfAmountDeterminationTxt>
      </TransactionsRelatedOrgGrp>
      <TransactionsRelatedOrgGrp>
        <OtherOrganizationName>
          <BusinessNameLine1Txt>AAO SERVICES INC</BusinessNameLine1Txt>
        </OtherOrganizationName>
        <TransactionTypeTxt>Q</TransactionTypeTxt>
        <InvolvedAmt>1178020</InvolvedAmt>
        <MethodOfAmountDeterminationTxt>CASH</MethodOfAmountDeterminationTxt>
      </TransactionsRelatedOrgGrp>
    </IRS990ScheduleR>
  </ReturnData>
</Return>
