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      <GrassrootsNontaxableGrp>
        <FilingOrganizationsTotalAmt>94048</FilingOrganizationsTotalAmt>
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      <TotLbbyngGrassrootMnsNonTxGrp>
        <FilingOrganizationsTotalAmt>0</FilingOrganizationsTotalAmt>
      </TotLbbyngGrassrootMnsNonTxGrp>
      <TotLbbyExpendMnsLbbyngNonTxGrp>
        <FilingOrganizationsTotalAmt>0</FilingOrganizationsTotalAmt>
      </TotLbbyExpendMnsLbbyngNonTxGrp>
      <AvgLobbyingNontaxableAmountGrp>
        <CurrentYearMinus3Amt>366288</CurrentYearMinus3Amt>
        <CurrentYearMinus2Amt>355877</CurrentYearMinus2Amt>
        <CurrentYearMinus1Amt>342921</CurrentYearMinus1Amt>
        <CurrentYearAmt>376190</CurrentYearAmt>
        <TotalAmt>1441276</TotalAmt>
      </AvgLobbyingNontaxableAmountGrp>
      <LobbyingCeilingAmt>2161914</LobbyingCeilingAmt>
      <AvgTotalLobbyingExpendGrp>
        <CurrentYearMinus3Amt>241439</CurrentYearMinus3Amt>
        <CurrentYearMinus2Amt>240000</CurrentYearMinus2Amt>
        <CurrentYearMinus1Amt>240000</CurrentYearMinus1Amt>
        <CurrentYearAmt>240000</CurrentYearAmt>
        <TotalAmt>961439</TotalAmt>
      </AvgTotalLobbyingExpendGrp>
      <AvgGrassrootsNontaxableGrp>
        <CurrentYearMinus3Amt>91572</CurrentYearMinus3Amt>
        <CurrentYearMinus2Amt>88969</CurrentYearMinus2Amt>
        <CurrentYearMinus1Amt>85730</CurrentYearMinus1Amt>
        <CurrentYearAmt>94048</CurrentYearAmt>
        <TotalAmt>360319</TotalAmt>
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      <GrassrootsCeilingAmt>540479</GrassrootsCeilingAmt>
    </IRS990ScheduleC>
    <IRS990ScheduleD documentId="RetDoc1040000001">
      <CYEndwmtFundGrp>
        <BeginningYearBalanceAmt>8802235</BeginningYearBalanceAmt>
        <ContributionsAmt>925135</ContributionsAmt>
        <InvestmentEarningsOrLossesAmt>647969</InvestmentEarningsOrLossesAmt>
        <OtherExpendituresAmt>352713</OtherExpendituresAmt>
        <EndYearBalanceAmt>10022626</EndYearBalanceAmt>
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      <CYMinus1YrEndwmtFundGrp>
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        <ContributionsAmt>19880</ContributionsAmt>
        <InvestmentEarningsOrLossesAmt>6282</InvestmentEarningsOrLossesAmt>
        <OtherExpendituresAmt>13006</OtherExpendituresAmt>
        <EndYearBalanceAmt>8802235</EndYearBalanceAmt>
      </CYMinus1YrEndwmtFundGrp>
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        <ContributionsAmt>23211</ContributionsAmt>
        <InvestmentEarningsOrLossesAmt>3945</InvestmentEarningsOrLossesAmt>
        <OtherExpendituresAmt>14899</OtherExpendituresAmt>
        <EndYearBalanceAmt>8789079</EndYearBalanceAmt>
      </CYMinus2YrEndwmtFundGrp>
      <CYMinus3YrEndwmtFundGrp>
        <BeginningYearBalanceAmt>8732469</BeginningYearBalanceAmt>
        <ContributionsAmt>41910</ContributionsAmt>
        <InvestmentEarningsOrLossesAmt>15455</InvestmentEarningsOrLossesAmt>
        <OtherExpendituresAmt>13012</OtherExpendituresAmt>
        <EndYearBalanceAmt>8776822</EndYearBalanceAmt>
      </CYMinus3YrEndwmtFundGrp>
      <CYMinus4YrEndwmtFundGrp>
        <BeginningYearBalanceAmt>8703232</BeginningYearBalanceAmt>
        <ContributionsAmt>27735</ContributionsAmt>
        <InvestmentEarningsOrLossesAmt>12369</InvestmentEarningsOrLossesAmt>
        <OtherExpendituresAmt>10867</OtherExpendituresAmt>
        <EndYearBalanceAmt>8732469</EndYearBalanceAmt>
      </CYMinus4YrEndwmtFundGrp>
      <BoardDesignatedBalanceEOYPct>0.95700</BoardDesignatedBalanceEOYPct>
      <PrmnntEndowmentBalanceEOYPct>0.04000</PrmnntEndowmentBalanceEOYPct>
      <TermEndowmentBalanceEOYPct>0.00300</TermEndowmentBalanceEOYPct>
      <EndowmentsHeldUnrelatedOrgInd>0</EndowmentsHeldUnrelatedOrgInd>
      <EndowmentsHeldRelatedOrgInd>0</EndowmentsHeldRelatedOrgInd>
      <OtherLandBuildingsGrp>
        <OtherCostOrOtherBasisAmt>86688</OtherCostOrOtherBasisAmt>
        <DepreciationAmt>20564</DepreciationAmt>
        <BookValueAmt>66124</BookValueAmt>
      </OtherLandBuildingsGrp>
      <TotalBookValueLandBuildingsAmt>66124</TotalBookValueLandBuildingsAmt>
      <FootnoteTextInd>X</FootnoteTextInd>
      <TotalRevEtcAuditedFinclStmtAmt>5626351</TotalRevEtcAuditedFinclStmtAmt>
      <NetUnrealizedGainsInvstAmt>930346</NetUnrealizedGainsInvstAmt>
      <RevenueNotReportedAmt>930346</RevenueNotReportedAmt>
      <RevenueSubtotalAmt>4696005</RevenueSubtotalAmt>
      <InvestmentExpensesNotIncldAmt>68247</InvestmentExpensesNotIncldAmt>
      <OtherRevenuesNotIncludedAmt>281483</OtherRevenuesNotIncludedAmt>
      <RevenueNotReportedFinclStmtAmt>349730</RevenueNotReportedFinclStmtAmt>
      <TotalRevenuePerForm990Amt>5045735</TotalRevenuePerForm990Amt>
      <TotExpnsEtcAuditedFinclStmtAmt>4817729</TotExpnsEtcAuditedFinclStmtAmt>
      <ExpensesNotReportedAmt>0</ExpensesNotReportedAmt>
      <ExpensesSubtotalAmt>4817729</ExpensesSubtotalAmt>
      <InvestmentExpensesNotIncld2Amt>68247</InvestmentExpensesNotIncld2Amt>
      <ExpensesNotRptFinclStmtAmt>68247</ExpensesNotRptFinclStmtAmt>
      <TotalExpensesPerForm990Amt>4885976</TotalExpensesPerForm990Amt>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART V, LINE 4:</FormAndLineReferenceDesc>
        <ExplanationTxt>INCOME FROM THE ENDOWMENT FUNDS SUPPORTS CORE AST PROGRAMS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART X, LINE 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>GAAP REQUIRES ENTITIES TO EVALUATE, MEASURE, RECOGNIZE AND DISCLOSE ANY UNCERTAIN INCOME TAX POSITIONS TAKEN ON THEIR TAX RETURNS. GAAP PRESCRIBES A MINIMUM THRESHOLD THAT A TAX POSITION IS REQUIRED TO MEET IN ORDER TO BE RECOGNIZED IN THE CONSOLIDATED FINANCIAL STATEMENTS. AST AND TNFTAP BELIEVE THAT THEY HAD NO UNCERTAIN TAX POSITIONS AS DEFINED IN GAAP.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART XI, LINE 4B - OTHER ADJUSTMENTS:</FormAndLineReferenceDesc>
        <ExplanationTxt>CONTRACT SEVERANCE PAYMENT 281,483.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleD>
    <IRS990ScheduleI documentId="RetDoc1041900001">
      <GrantRecordsMaintainedInd>1</GrantRecordsMaintainedInd>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>NATIONAL ACADEMY OF SCIENCES</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>2101 CONSTITUTION AVE NW</AddressLine1Txt>
          <CityNm>WASHINGTON</CityNm>
          <StateAbbreviationCd>DC</StateAbbreviationCd>
          <ZIPCd>20418</ZIPCd>
        </USAddress>
        <RecipientEIN>530196932</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>25000</CashGrantAmt>
        <ValuationMethodUsedDesc>FMV</ValuationMethodUsedDesc>
        <PurposeOfGrantTxt>FOR INSTITUTION OF MEDICINE DONOR INTERVENTION STUDY.</PurposeOfGrantTxt>
      </RecipientTable>
      <Total501c3OrgCnt>1</Total501c3OrgCnt>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>RESEARCH GRANTS &amp; CAREER DEVELOPMENT AWARDS</GrantTypeTxt>
        <RecipientCnt>34</RecipientCnt>
        <CashGrantAmt>521250</CashGrantAmt>
        <ValuationMethodUsedDesc>FMV</ValuationMethodUsedDesc>
      </GrantsOtherAsstToIndivInUSGrp>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>FELLOWS SYMPOSIUM TRAVEL GRANTS</GrantTypeTxt>
        <RecipientCnt>180</RecipientCnt>
        <CashGrantAmt>82720</CashGrantAmt>
        <ValuationMethodUsedDesc>FMV</ValuationMethodUsedDesc>
      </GrantsOtherAsstToIndivInUSGrp>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART I, LINE 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>AST DETERMINES THE ALLOCATION OF RESEARCH GRANT FUNDS THROUGH ITS GRANT APPLICATION PROCESS. APPLICANTS PROVIDE A DETAILED PROPOSAL, AND A DIVERSE COMMITTEE OF EXPERTS REVIEWS/SCORES EACH PROPOSAL USING ESTABLISHED SCORING CRITERIA. GRANT RECIPIENTS MUST SIGN A LETTER OF AGREEMENT OUTLINING THE TERMS OF THE GRANT FUNDING. AST REQUIRES GRANT RECIPIENTS TO CONFIRM QUARTERLY THAT THEY STILL MEET THE GRANT CRITERIA BEFORE PAYMENTS ARE ISSUED. EACH GRANT RECIPIENT IS ALSO REQUIRED TO SUBMIT AN INTERIM REPORT TO DEMONSTRATE PROGRESS. A FINAL REPORT IS REQUESTED OF THE GRANT RECIPIENT ONCE THE GRANT PERIOD HAS ENDED.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleI>
    <IRS990ScheduleO documentId="RetDoc1044400001">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 3</FormAndLineReferenceDesc>
        <ExplanationTxt>AST AND TNFTAP RECEIVED VARIOUS MANAGEMENT SERVICES INCLUDING THOSE RELATED TO ADMINISTRATION, MEETINGS, EDUCATION AND WEBSITE SERVICES FROM ASSOCIATION HEADQUARTERS, INC.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 6</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ORGANIZATION HAS ONE CLASS OF VOTING MEMBERS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 7A</FormAndLineReferenceDesc>
        <ExplanationTxt>FULL AND INTERNATIONAL MEMBERS HAVE THE RIGHT TO HOLD OFFICE ON THE COUNCIL AND SERVE ON COMMITTEES.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 7B</FormAndLineReferenceDesc>
        <ExplanationTxt>ALL FULL, INTERNATIONAL, AND TRAINEE MEMBERS HAVE THE RIGHT TO VOTE ON ALL MATTERS BROUGHT BEFORE THE GENERAL MEMBERSHIP, SUCH AS APPROVAL OF REVISIONS TO BYLAWS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 11B</FormAndLineReferenceDesc>
        <ExplanationTxt>PRIOR TO ITS FILING WITH THE IRS, THE AUDIT COMMITTEE THOROUGHLY REVIEWS THE FORM 990 AND RECOMMENDS ITS APPROVAL TO THE COUNCIL. A COPY OF THE FORM 990 IS PROVIDED TO EACH VOTING MEMBER OF THE COUNCIL FOR REVIEW BEFORE IT IS FILED WITH THE IRS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 12C</FormAndLineReferenceDesc>
        <ExplanationTxt>THE COUNCIL AND EVERY COMMITTEE REVIEWS THE SUMMARY OF INDIVIDUAL DISCLOSURES AND NOTES ANY AREAS OF BUSINESS. CONFLICTS OF INTEREST ARE ALSO MANAGED AND RESOLVED BY THE CONFLICT OF INTEREST COMMITTEE.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 15A</FormAndLineReferenceDesc>
        <ExplanationTxt>THE AST BOARD OF DIRECTORS TAKES ITS FIDUCIARY RESPONSIBILITY VERY SERIOUSLY. DURING THE ANNUAL BUDGETING PROCESS, THE AST BOARD UTILIZES A RIGOROUS METHOD FOR THE REVIEW AND APPROVAL OF THE AST'S SCOPE OF WORK, STAFFING MODEL AND ASSOCIATED MANAGEMENT FEE. TO ENSURE THAT THE MANAGEMENT FEE IS APPROPRIATE, THE AST BOARD USES TWO SOURCES OF BENCHMARKING DATA: 1) THE AMERICAN SOCIETY OF ASSOCIATION EXECUTIVES, OPERATING RATIOS REPORT, A DESKTOP REFERENCE USED BY ASSOCIATION EXECUTIVES AND VOLUNTEER LEADERS FOR BENCHMARKING THE FINANCIAL AND OPERATIONAL PERFORMANCE OF THEIR ORGANIZATIONS AGAINST SIMILAR ORGANIZATIONS; AND, 2) COMPARABLE PERSONNEL AND OVERHEAD DATA MINED FROM THE FORM 990S OF RELATED ASSOCIATIONS. THE BOARD FULLY SUPPORTS TRANSPARENCY IN THE REPORTING OF THE CEO'S COMPENSATION. FOR THE YEAR 2016 THE COMPENSATION FOR AST'S CHIEF STAFF EXECUTIVE WAS $135,415. THIS IS INCLUSIVE OF SALARY AND BENEFITS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>COPIES OF THE ORGANIZATIONS GOVERNING DOCUMENTS, CONFLICT OF INTEREST POLICY AND FINANCIAL STATEMENTS ARE PROVIDED UPON REQUEST.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART XI, LINE 9:</FormAndLineReferenceDesc>
        <ExplanationTxt>CONTRACT SEVERANCE PAYMENT -281,483.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
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          <BusinessNameLine1Txt>AST TRANSPLANT NEPHROLOGY FELLOWSHIP TRAINING ACCREDITATION PROGRAM LLC</BusinessNameLine1Txt>
        </DisregardedEntityName>
        <USAddress>
          <AddressLine1Txt>1120 ROUTE 73 SUITE 200</AddressLine1Txt>
          <CityNm>MOUNT LAUREL</CityNm>
          <StateAbbreviationCd>NJ</StateAbbreviationCd>
          <ZIPCd>08054</ZIPCd>
        </USAddress>
        <PrimaryActivitiesTxt>PROMOTES THE EDUCATION, TRAINING AND KNOWLEDGE OF RENAL TRANSPLANT PHYSICIAN</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>IA</LegalDomicileStateCd>
        <TotalIncomeAmt>84250</TotalIncomeAmt>
        <EndOfYearAssetsAmt>78224</EndOfYearAssetsAmt>
        <DirectControllingEntityName>
          <BusinessNameLine1Txt>AMERICAN SOCIETY OF TRANSPLANTATION</BusinessNameLine1Txt>
        </DirectControllingEntityName>
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    </IRS990ScheduleR>
  </ReturnData>
</Return>