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      <ForeignIndividualsGrantsGrp>
        <TypeOfAssistanceTxt>SURGICAL OUTREACH AND EDUCATIONAL GRANTS</TypeOfAssistanceTxt>
        <RegionTxt>EUROPE (INCLUDING ICELAND &amp; GREENLAND)</RegionTxt>
        <RecipientCnt>2</RecipientCnt>
        <CashGrantAmt>33300</CashGrantAmt>
        <MannerOfCashDisbursementTxt>CASH PAYMENT</MannerOfCashDisbursementTxt>
      </ForeignIndividualsGrantsGrp>
      <TransferToForeignCorpInd>0</TransferToForeignCorpInd>
      <InterestInForeignTrustInd>0</InterestInForeignTrustInd>
      <ForeignCorpOwnershipInd>0</ForeignCorpOwnershipInd>
      <PassiveForeignInvestmestCoInd>0</PassiveForeignInvestmestCoInd>
      <ForeignPartnershipInd>0</ForeignPartnershipInd>
      <BoycottCountriesInd>0</BoycottCountriesInd>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART I, LINE 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>TSF REQUIRES INTERIM REPORTING FROM ALL AWARDEES, INCLUDING THOSE FROM OUTSIDE THE UNITED STATES. AT INTERVALS DURING THE AWARD TERM, AWARDEES MUST SUBMIT A WRITTEN UPDATE ON RESEARCH OR FELLOWSHIP PROGRESS, AIMS ACHIEVED OR IN PROCESS, OBSTACLES ENCOUNTERED, AND A BUDGET UPDATE THAT DESCRIBES USE OF AWARDED FUNDS. THESE REPORTS ARE REVIEWED BY TSF STAFF AND LEADERSHIP TO MONITOR THE APPROPRIATE USE OF GRANTS AND TO ENSURE THAT GRANTEE ACTIVITIES ALIGN WITH THE ORGANIZATION'S MISSION.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleF>
    <IRS990ScheduleI documentId="RetDoc1041900001">
      <GrantRecordsMaintainedInd>1</GrantRecordsMaintainedInd>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>DIVINE WILL FOUNDATION</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>PO BOX 235795</AddressLine1Txt>
          <CityNm>ENCINITAS</CityNm>
          <StateAbbreviationCd>CA</StateAbbreviationCd>
          <ZIPCd>92024</ZIPCd>
        </USAddress>
        <RecipientEIN>463820097</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>35000</CashGrantAmt>
        <NonCashAssistanceAmt>0</NonCashAssistanceAmt>
        <PurposeOfGrantTxt>EVERY HEART BEAT MATTERS</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>DUKE UNIVERSITY</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>ACCOUNTS RECEIVABLE LOCKBOX PO BOX</AddressLine1Txt>
          <AddressLine2Txt>602651</AddressLine2Txt>
          <CityNm>CHARLOTTE</CityNm>
          <StateAbbreviationCd>NC</StateAbbreviationCd>
          <ZIPCd>282602651</ZIPCd>
        </USAddress>
        <RecipientEIN>560532129</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>105000</CashGrantAmt>
        <NonCashAssistanceAmt>0</NonCashAssistanceAmt>
        <PurposeOfGrantTxt>EVERY HEART BEAT MATTERS</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>INDIANA UNIVERSITY HEALTH FOUNDATION INC</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>1633 N CAPITOL AVE SUITE 1200</AddressLine1Txt>
          <CityNm>INDIANAPOLIS</CityNm>
          <StateAbbreviationCd>IN</StateAbbreviationCd>
          <ZIPCd>46202</ZIPCd>
        </USAddress>
        <RecipientEIN>366043086</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>35000</CashGrantAmt>
        <NonCashAssistanceAmt>0</NonCashAssistanceAmt>
        <PurposeOfGrantTxt>EVERY HEART BEAT MATTERS</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>PERUVIAN AMERICAN MEDICAL SOCIETY</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>3009 TOREADOR DR NE</AddressLine1Txt>
          <CityNm>ALBUQUERQUE</CityNm>
          <StateAbbreviationCd>NM</StateAbbreviationCd>
          <ZIPCd>87111</ZIPCd>
        </USAddress>
        <RecipientEIN>382824781</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>70000</CashGrantAmt>
        <NonCashAssistanceAmt>0</NonCashAssistanceAmt>
        <PurposeOfGrantTxt>EVERY HEART BEAT MATTERS</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>REGENTS OF THE UNIVERSITY OF MINNESOTA</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>NW 5957 PO BOX 1450</AddressLine1Txt>
          <CityNm>MINNEAPOLIS</CityNm>
          <StateAbbreviationCd>MN</StateAbbreviationCd>
          <ZIPCd>554855957</ZIPCd>
        </USAddress>
        <RecipientEIN>416007513</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>70000</CashGrantAmt>
        <NonCashAssistanceAmt>0</NonCashAssistanceAmt>
        <PurposeOfGrantTxt>EVERY HEART BEAT MATTERS</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>REGENTS OF UNIVERSITY OF CAPE TOWN FUND INC</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>201 ALLEN ST UNIT 10019</AddressLine1Txt>
          <CityNm>NEW YORK</CityNm>
          <StateAbbreviationCd>NY</StateAbbreviationCd>
          <ZIPCd>10002</ZIPCd>
        </USAddress>
        <RecipientEIN>133202349</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>70000</CashGrantAmt>
        <NonCashAssistanceAmt>0</NonCashAssistanceAmt>
        <PurposeOfGrantTxt>EVERY HEART BEAT MATTERS</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>THE UNIVERSITY OF TEXAS AT AUSTIN</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>110 INNER CAMPUS DR MS K5300</AddressLine1Txt>
          <CityNm>AUSTIN</CityNm>
          <StateAbbreviationCd>TX</StateAbbreviationCd>
          <ZIPCd>78712</ZIPCd>
        </USAddress>
        <RecipientEIN>746000203</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>70000</CashGrantAmt>
        <NonCashAssistanceAmt>0</NonCashAssistanceAmt>
        <PurposeOfGrantTxt>EVERY HEART BEAT MATTERS</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>UNIVERSITY OF WASHINGTON</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>12455 COLLECTIONS DR</AddressLine1Txt>
          <CityNm>CHICAGO</CityNm>
          <StateAbbreviationCd>IL</StateAbbreviationCd>
          <ZIPCd>60693</ZIPCd>
        </USAddress>
        <RecipientEIN>916001537</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>70000</CashGrantAmt>
        <NonCashAssistanceAmt>0</NonCashAssistanceAmt>
        <PurposeOfGrantTxt>EVERY HEART BEAT MATTERS</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>VOOM FOUNDATION</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>1602 ROCK PRAIRIE RD SUITE 130 A</AddressLine1Txt>
          <CityNm>COLLEGE STATION</CityNm>
          <StateAbbreviationCd>TX</StateAbbreviationCd>
          <ZIPCd>77845</ZIPCd>
        </USAddress>
        <RecipientEIN>582678884</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>93300</CashGrantAmt>
        <NonCashAssistanceAmt>0</NonCashAssistanceAmt>
        <PurposeOfGrantTxt>EVERY HEART BEAT MATTERS</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>WILLIAM NOVICK GLOBAL CARDIAC ALLIANCE</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>1750 MADISON AVE STE 500</AddressLine1Txt>
          <CityNm>MEMPHIS</CityNm>
          <StateAbbreviationCd>TN</StateAbbreviationCd>
          <ZIPCd>38104</ZIPCd>
        </USAddress>
        <RecipientEIN>472184002</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>35000</CashGrantAmt>
        <NonCashAssistanceAmt>0</NonCashAssistanceAmt>
        <PurposeOfGrantTxt>EVERY HEART BEAT MATTERS</PurposeOfGrantTxt>
      </RecipientTable>
      <Total501c3OrgCnt>10</Total501c3OrgCnt>
      <TotalOtherOrgCnt>0</TotalOtherOrgCnt>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>LEVI WATKINS FELLOWSHIP</GrantTypeTxt>
        <RecipientCnt>1</RecipientCnt>
        <CashGrantAmt>5000</CashGrantAmt>
      </GrantsOtherAsstToIndivInUSGrp>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>CAROLYN REED TRAVELING FELLOWSHIP</GrantTypeTxt>
        <RecipientCnt>2</RecipientCnt>
        <CashGrantAmt>17500</CashGrantAmt>
      </GrantsOtherAsstToIndivInUSGrp>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>MICHAEL DAVIDSON FELLOWSHIP</GrantTypeTxt>
        <RecipientCnt>2</RecipientCnt>
        <CashGrantAmt>67500</CashGrantAmt>
      </GrantsOtherAsstToIndivInUSGrp>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>TSF RESEARCH</GrantTypeTxt>
        <RecipientCnt>4</RecipientCnt>
        <CashGrantAmt>580000</CashGrantAmt>
      </GrantsOtherAsstToIndivInUSGrp>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>LUNG CANER RESEARCH AWARD</GrantTypeTxt>
        <RecipientCnt>2</RecipientCnt>
        <CashGrantAmt>200000</CashGrantAmt>
      </GrantsOtherAsstToIndivInUSGrp>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>AZ MINORITY HEALTH RESEARCH</GrantTypeTxt>
        <RecipientCnt>2</RecipientCnt>
        <CashGrantAmt>200000</CashGrantAmt>
      </GrantsOtherAsstToIndivInUSGrp>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>EVERY HEARTBEAT MATTERS</GrantTypeTxt>
        <RecipientCnt>1</RecipientCnt>
        <CashGrantAmt>1512</CashGrantAmt>
      </GrantsOtherAsstToIndivInUSGrp>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>BRAUNWALAD RESEARCH AWARD</GrantTypeTxt>
        <RecipientCnt>3</RecipientCnt>
        <CashGrantAmt>400000</CashGrantAmt>
      </GrantsOtherAsstToIndivInUSGrp>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>STSA RESEARCH AWARD</GrantTypeTxt>
        <RecipientCnt>2</RecipientCnt>
        <CashGrantAmt>160000</CashGrantAmt>
      </GrantsOtherAsstToIndivInUSGrp>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>REPLOGLE TRAVELING FELLOWSHIP</GrantTypeTxt>
        <RecipientCnt>1</RecipientCnt>
        <CashGrantAmt>10000</CashGrantAmt>
      </GrantsOtherAsstToIndivInUSGrp>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>ALLEY SHERIDAN</GrantTypeTxt>
        <RecipientCnt>1</RecipientCnt>
        <CashGrantAmt>2500</CashGrantAmt>
      </GrantsOtherAsstToIndivInUSGrp>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>STS RESEARCH AWARD</GrantTypeTxt>
        <RecipientCnt>1</RecipientCnt>
        <CashGrantAmt>180000</CashGrantAmt>
      </GrantsOtherAsstToIndivInUSGrp>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>SAHA SCHOLARSHIP</GrantTypeTxt>
        <RecipientCnt>8</RecipientCnt>
        <CashGrantAmt>15845</CashGrantAmt>
      </GrantsOtherAsstToIndivInUSGrp>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>STS CORONARY CONFERENCE RESIDENT SCHOLARSHIP</GrantTypeTxt>
        <RecipientCnt>5</RecipientCnt>
        <CashGrantAmt>8149</CashGrantAmt>
      </GrantsOtherAsstToIndivInUSGrp>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>NICHOLAS KOUCHOUKOS AWARD</GrantTypeTxt>
        <RecipientCnt>3</RecipientCnt>
        <CashGrantAmt>16000</CashGrantAmt>
      </GrantsOtherAsstToIndivInUSGrp>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>TSF UNDERREPRESENTED ROBOTIC GENERAL THORACIC SURGEON DEVELOPMENT AWARD</GrantTypeTxt>
        <RecipientCnt>3</RecipientCnt>
        <CashGrantAmt>30000</CashGrantAmt>
      </GrantsOtherAsstToIndivInUSGrp>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>THE THORACIC SURGERY FOUNDATION/FRANCIS FONTAN FUND INTERNATIONAL TRAVELING FELLOWSHIP</GrantTypeTxt>
        <RecipientCnt>2</RecipientCnt>
        <CashGrantAmt>40000</CashGrantAmt>
      </GrantsOtherAsstToIndivInUSGrp>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>VIVIEN THOMAS AWARD</GrantTypeTxt>
        <RecipientCnt>1</RecipientCnt>
        <CashGrantAmt>10000</CashGrantAmt>
      </GrantsOtherAsstToIndivInUSGrp>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>EXTRAORDINARY WOMEN IN CT SURGERY</GrantTypeTxt>
        <RecipientCnt>3</RecipientCnt>
        <CashGrantAmt>15000</CashGrantAmt>
      </GrantsOtherAsstToIndivInUSGrp>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>DOUGLAS MATHISEN TRAVELING FELLOWSHIP</GrantTypeTxt>
        <RecipientCnt>1</RecipientCnt>
        <CashGrantAmt>20000</CashGrantAmt>
      </GrantsOtherAsstToIndivInUSGrp>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>ROBOTIC CARDIAC FELLOWSHIP</GrantTypeTxt>
        <RecipientCnt>1</RecipientCnt>
        <CashGrantAmt>9000</CashGrantAmt>
      </GrantsOtherAsstToIndivInUSGrp>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>STS DATABASE CLINICAL RESEARCH</GrantTypeTxt>
        <RecipientCnt>1</RecipientCnt>
        <CashGrantAmt>80000</CashGrantAmt>
      </GrantsOtherAsstToIndivInUSGrp>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART I, LINE 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>EACH TSF GRANT PROJECT IS THOROUGHLY EVALUATED AND SCORED BY THREE TSF RESEARCH COMMITTEE REVIEWERS. THE RESEARCH REVIEWERS HAVE BEEN APPOINTED BY THE TSF PRESIDENT AND APPROVED BY THE TSF BOARD OF DIRECTORS, AND SPECIALIZE IN THORACIC SURGERY. THE GRANT APPLICANT IS REQUIRED TO SUBMIT HIS/HER APPLICATION INCLUDING CV, HIS/HER MENTOR'S CV, RESEARCH DESCRIPTION, PHOTO, AND THREE LETTERS OF RECOMMENDATION FROM THE APPLICANT'S SUPERIOR AT THE INSTITUTION OF WHICH THEY ARE APPLYING THE RESEARCH. THE LETTERS OF RECOMMENDATION MUST COME FROM DEPARTMENT CHAIRS, PROGRAM DIRECTORS, OR SPONSORS AT THE INSTITUTION IN WHICH THE RESEARCH OCCURS. THE APPLICANT'S SPONSOR'S CV IS ALSO EVALUATED. EACH SUBSEQUENT GRANT PAYMENT IS ISSUED AFTER THE APPLICANT SUBMITS A VALID PROGRESS REPORT, AND AFTER THE INSTITUTION SUPPLIES A SIGNED FINANCIAL PROGRESS REPORT VALIDATING THE EXPENSES.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleI>
    <IRS990ScheduleJ documentId="RetDoc1042400001">
      <SubstantiationRequiredInd>1</SubstantiationRequiredInd>
      <SeverancePaymentInd>0</SeverancePaymentInd>
      <SupplementalNonqualRtrPlanInd>0</SupplementalNonqualRtrPlanInd>
      <EquityBasedCompArrngmInd>0</EquityBasedCompArrngmInd>
      <CompBasedOnRevenueOfFlngOrgInd>0</CompBasedOnRevenueOfFlngOrgInd>
      <CompBsdOnRevRelatedOrgsInd>0</CompBsdOnRevRelatedOrgsInd>
      <CompBsdNetEarnsFlngOrgInd>0</CompBsdNetEarnsFlngOrgInd>
      <CompBsdNetEarnsRltdOrgsInd>0</CompBsdNetEarnsRltdOrgsInd>
      <AnyNonFixedPaymentsInd>0</AnyNonFixedPaymentsInd>
      <InitialContractExceptionInd>0</InitialContractExceptionInd>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>LEE WIENSCH</PersonNm>
        <TitleTxt>EXECUTIVE DIRECTOR</TitleTxt>
        <BaseCompensationFilingOrgAmt>152911</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>2822</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>14484</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>32849</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>203066</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART I, LINE 3</FormAndLineReferenceDesc>
        <ExplanationTxt>THE SOCIETY OF THORACIC SURGEONS IS RESPONSIBLE FOR ALL COMPENSATION AND BENEFIT MATTERS. THE SOCIETY ANNUALLY PARTICIPATES IN AN INDUSTRY SPECIFIC EXECUTIVE COMPENSATION SURVEY. THE RESULTS OF THIS SURVEY ARE REVIEWED BY MANAGEMENT AND THE BOARD OF DIRECTORS. IN ADDITION THE BOARD OF DIRECTORS REGULARLY ENGAGES AN EXTERNAL COMPENSATION CONSULTING FIRM TO ASSIST IN ITS REVIEW OF THE LEVEL OF COMPENSATION, INCENTIVES AND BENEFITS FOR SENIOR EXECUTIVES AND KEY EMPLOYEES. ANNUALLY, THE SOCIETY'S STAFF AND/OR THE BOARD OF DIRECTORS PREPARES PERFORMANCE REVIEWS FOR ALL SENIOR MANAGERS AND KEY EMPLOYEES AND MAKES A RECOMMENDATION REGARDING COMPENSATION, INCENTIVES AND BENEFITS ADJUSTMENTS. THE BOARD OF DIRECTORS CONSIDERS THE PERFORMANCE RECOMMENDATION, COMPARISONS OF TOTAL COMPENSATION BY EXECUTIVE TO MARKET COMPENSATION PERCENTILE FOR INDUSTRY EXECUTIVES WITH SIMILAR JOB TITLES AND/OR SKILL SETS, AND ORGANIZATIONAL NEEDS. A RECOMMENDATION REGARDING COMPENSATION AND BENEFITS CHANGES FOR SENIOR MANAGEMENT IS MADE, WHICH IS APPROVED ANNUALLY BY THE FULL BOARD OF DIRECTORS WITHIN THE BUDGET PROCESS. THE BOARD OF DIRECTORS PROCEEDINGS ARE CONTEMPORANEOUSLY DOCUMENTED AND MINUTES ARE MAINTAINED.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleJ>
    <IRS990ScheduleO documentId="RetDoc1044400001">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 3</FormAndLineReferenceDesc>
        <ExplanationTxt>THE SOCIETY OF THORACIC SURGEONS (STS) OF CHICAGO, ILLINOIS, MAINTAINS THE BOOKS AND RECORDS OF THE ORGANIZATION AND PERFORMS OTHER RELATED MANAGERIAL AND ADMINISTRATIVE FUNCTIONS FOR WHICH IT IS COMPENSATED.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 4</FormAndLineReferenceDesc>
        <ExplanationTxt>DURING 2023, TSF REVISED ITS BYLAWS. THESE REVISIONS WERE AS FOLLOWS: 1. TO UPDATE THE ORGANIZATION'S MISSION STATEMENT 2. TO EXTEND OFFICER TERMS FROM TWO YEARS TO THREE YEARS WITH STAGGERED TERMS AND ADJUST THE MINIMUM AND MAXIMUM NUMBER OF SEATS ON THE TSF BOARD TO COMPLY WITH ILLINOIS STATE REQUIREMENTS ALLOWING A RANGE OF NO MORE THAN FIVE SEATS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 7A</FormAndLineReferenceDesc>
        <ExplanationTxt>THE SOCIETY OF THORACIC SURGEONS OF CHICAGO, A RELATED ORGANIZATION, IS RESPONSIBLE FOR THE APPROVAL OF BYLAW CHANGES AS WELL AS APPROVAL AND APPOINTMENT OF OFFICERS AND BOARD MEMBERS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 7B</FormAndLineReferenceDesc>
        <ExplanationTxt>THE SOCIETY OF THORACIC SURGEONS OF CHICAGO, A RELATED ORGANIZATION, IS RESPONSIBLE FOR THE APPROVAL OF BYLAW CHANGES AS WELL AS APPROVAL AND APPOINTMENT OF OFFICERS AND BOARD MEMBERS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 11B</FormAndLineReferenceDesc>
        <ExplanationTxt>THE 990 IS REVIEWED BY THE ADMINISTRATIVE STAFF OF THE MANAGEMENT COMPANY (STS) AND IS THEN PROVIDED TO THE TREASURER, AND THEN GOVERNING BODY, FOR FINAL REVIEW BEFORE IT IS FILED.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 12C</FormAndLineReferenceDesc>
        <ExplanationTxt>TSF HAS A FORMAL CONFLICT OF INTEREST POLICY. ALL BOARD AND COMMITTEE MEMBERS ARE REQUIRED TO SIGN THE POLICY AND DISCLOSE CONFLICTS ANNUALLY. THE SIGNED POLICY AND DISCLOSURES ARE SENT TO TSF ADMINISTRATION. THEY ARE RECORDED AND MONITORED PERIODICALLY THROUGHOUT THE YEAR. IF THERE IS A CONFLICT, IT IS BROUGHT TO THE ATTENTION OF THE BOARD PRESIDENT FOR FURTHER ACTION. THE BOARD PRESIDENT READS A DISCLOSURE STATEMENT AT THE BEGINNING OF EACH BOARD MEETING.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 15</FormAndLineReferenceDesc>
        <ExplanationTxt>COMPENSATION OF THE EXECUTIVE DIRECTOR IS DETERMINED BY A RELATED ORGANIZATION, THE SOCIETY OF THORACIC SURGEONS OF CHICAGO. THE RELATED ORGANIZATION UTILIZES AN INDEPENDENT COMPENSATION CONSULTANT, AND COMPENSATION SURVEYS OR STUDIES, TO DETERMINE COMPENSATION OF THE EXECUTIVE DIRECTOR OF TSF.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 18</FormAndLineReferenceDesc>
        <ExplanationTxt>FORM 990 IS AVAILABLE TO THE PUBLIC UPON REQUEST AT THE ADMINISTRATIVE OFFICES OF THE ORGANIZATION'S MANAGEMENT COMPANY (STS), AND ON THE FOUNDATION'S WEBSITE.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>THE CONFLICT OF INTEREST POLICY AND FINANCIAL STATEMENTS ARE AVAILABLE TO THE PUBLIC UPON REQUEST AT THE ADMINISTRATIVE OFFICES OF THE ORGANIZATION'S MANAGEMENT COMPANY.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VII, SECTION A - COMPENSATION:</FormAndLineReferenceDesc>
        <ExplanationTxt>COMPENSATION REPORTED FOR LEE WIENSCH, TSF'S CURRENT EXECUTIVE DIRECTOR, IS PAID BY A RELATED ORGANIZATION AND COMMON PAYMASTER, THE SOCIETY OF THORACIC SURGEONS (STS) EIN 36-3022713. SINCE ALL SERVICES PERFORMED BY THIS INDIVIDUAL ARE FOR THE THORACIC SURGERY FOUNDATION, THE COMPENSATION HAS BEEN REPORTED IN COLUMN D AS IF PAID BY THE FILING ORGANIZATION. STS HAS COMPLIED WITH PAYROLL FILING REQUIREMENTS.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
    <IRS990ScheduleR documentId="RetDoc1043400001">
      <IdRelatedTaxExemptOrgGrp>
        <DisregardedEntityName>
          <BusinessNameLine1Txt>THE SOCIETY OF THORACIC SURGEONS</BusinessNameLine1Txt>
        </DisregardedEntityName>
        <USAddress>
          <AddressLine1Txt>633 N SAINT CLAIR ST</AddressLine1Txt>
          <CityNm>CHICAGO</CityNm>
          <StateAbbreviationCd>IL</StateAbbreviationCd>
          <ZIPCd>60611</ZIPCd>
        </USAddress>
        <EIN>363022713</EIN>
        <PrimaryActivitiesTxt>TO ENHANCE THE ABILITY OF CARDIOTHORACIC SURGEONS.</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>IL</LegalDomicileStateCd>
        <ExemptCodeSectionTxt>501(C)(6)</ExemptCodeSectionTxt>
        <ControlledOrganizationInd>0</ControlledOrganizationInd>
      </IdRelatedTaxExemptOrgGrp>
      <ReceiptOfIntAnntsRntsRyltsInd>0</ReceiptOfIntAnntsRntsRyltsInd>
      <GiftGrntOrCapContriToOthOrgInd>0</GiftGrntOrCapContriToOthOrgInd>
      <GiftGrntCapContriFromOthOrgInd>1</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>1</PerformOfServicesForOthOrgInd>
      <PerformOfServicesByOtherOrgInd>1</PerformOfServicesByOtherOrgInd>
      <SharingOfFacilitiesInd>1</SharingOfFacilitiesInd>
      <PaidEmployeesSharingInd>1</PaidEmployeesSharingInd>
      <ReimbursementPaidToOtherOrgInd>1</ReimbursementPaidToOtherOrgInd>
      <ReimbursementPaidByOtherOrgInd>0</ReimbursementPaidByOtherOrgInd>
      <TransferToOtherOrgInd>0</TransferToOtherOrgInd>
      <TransferFromOtherOrgInd>1</TransferFromOtherOrgInd>
      <TransactionsRelatedOrgGrp>
        <OtherOrganizationName>
          <BusinessNameLine1Txt>THE SOCIETY OF THORACIC SURGEONS</BusinessNameLine1Txt>
        </OtherOrganizationName>
        <TransactionTypeTxt>C</TransactionTypeTxt>
        <InvolvedAmt>387833</InvolvedAmt>
        <MethodOfAmountDeterminationTxt>CASH PAID</MethodOfAmountDeterminationTxt>
      </TransactionsRelatedOrgGrp>
    </IRS990ScheduleR>
  </ReturnData>
</Return>