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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART XII, LINE 2D - OTHER ADJUSTMENTS:</FormAndLineReferenceDesc>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, SCHEDULE D, PART XI, LINE 2D AND PART XII, LINE 2D</FormAndLineReferenceDesc>
        <ExplanationTxt>PART XI, LINE 2D - DIRECT EXPENSES FROM FUNDRAISING EVENTS INCLUDED ON PAGE 9, PART VIII, LINE 8B. PART XII, LINE 2D - DIRECT EXPENSES FROM FUNDRAISING EVENTS INCLUDED ON PAGE 9, PART VIII, LINE 8B.</ExplanationTxt>
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      <RecipientTable>
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          <BusinessNameLine1Txt>UNIVERSITY OF PENNSYLVANIA</BusinessNameLine1Txt>
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        <PurposeOfGrantTxt>UPENN 2023: RESEARCH, COLLABORATION &amp; LICENSE AGREEMENT</PurposeOfGrantTxt>
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      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>KECK GRADUATE INSTITUTE OF APPLIED LIFE SCIENCES</BusinessNameLine1Txt>
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          <AddressLine1Txt>535 WATSON DRIVE</AddressLine1Txt>
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      <RecipientTable>
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          <StateAbbreviationCd>DC</StateAbbreviationCd>
          <ZIPCd>20010</ZIPCd>
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        <RecipientEIN>521654453</RecipientEIN>
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        <CashGrantAmt>140846</CashGrantAmt>
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        <PurposeOfGrantTxt>FT2022-003: PEAK ALPHA FREQUENCY AS AN EEG BIOMARKER FOR ANGELMAN SYNDROME</PurposeOfGrantTxt>
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      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>BROWN UNIVERSITY</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
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          <CityNm>PROVIDENCE</CityNm>
          <StateAbbreviationCd>RI</StateAbbreviationCd>
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        <RecipientEIN>050258809</RecipientEIN>
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        <PurposeOfGrantTxt>FT2022-005: DEVELOPMENT OF BDNF POTENTIATING THERAPEUTICS FOR MOTOR AND COGNITIVE DYSFUNCTION IN AS</PurposeOfGrantTxt>
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      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>BROWN UNIVERSITY</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>CONTROLLERS OFFICE - BOX J</AddressLine1Txt>
          <CityNm>PROVIDENCE</CityNm>
          <StateAbbreviationCd>RI</StateAbbreviationCd>
          <ZIPCd>02912</ZIPCd>
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        <RecipientEIN>050258809</RecipientEIN>
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        <PurposeOfGrantTxt>PD2023-001: POSTDOCTORAL FELLOWSHIP PROGRAM</PurposeOfGrantTxt>
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      <RecipientTable>
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      <RecipientTable>
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          <CityNm>DAVIS</CityNm>
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        <PurposeOfGrantTxt>FT2022-007: GASTROINTESTINAL BIOMARKERS IN PRECLINICAL MODELS OF ANGELMAN SYNDROME</PurposeOfGrantTxt>
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      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>RUSH UNIVERSITY MEDICAL CENTER</BusinessNameLine1Txt>
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        <USAddress>
          <AddressLine1Txt>1653 W CONGRESS PKWY</AddressLine1Txt>
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      <RecipientTable>
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        <PurposeOfGrantTxt>FT2023-002: DEVELOPING A CRISPRA THERAPY FOR THE CLASSI/II DELETION GENOTYPE OF ANGELMAN SYNDROME</PurposeOfGrantTxt>
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        <ExplanationTxt>THE FOUNDATION REQUIRES SEMI-ANNUAL REPORTS FROM THE RECIPIENT OF THE FUNDS WHICH MUST INCLUDE A PROGRESS STATUS AND AN ACCOUNTING OF THE FUNDS. IN ADDITION, THE FOUNDATION RESERVES THE RIGHT TO MAKE PERIODIC SIGHT VISITS AS DEEEMED NECESSARY. THE FOUNDATION MAY ALSO OBTAIN MORE INFREQUENT INFORMAL UPDATES VIA TELEPHONE OR E-MAIL.</ExplanationTxt>
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      <SupplementalNonqualRtrPlanInd>0</SupplementalNonqualRtrPlanInd>
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        <TotalCompensationFilingOrgAmt>0</TotalCompensationFilingOrgAmt>
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        <PersonNm>RYAN K FISCHER</PersonNm>
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        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
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        <DeferredCompensationFlngOrgAmt>0</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>0</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>245000</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>KENA PEARSON</PersonNm>
        <TitleTxt>CHIEF FINANCIAL OFFICER</TitleTxt>
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        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
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        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
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        <PersonNm>MICHELE GOLOMBUSKI</PersonNm>
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        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>19375</BonusFilingOrganizationAmount>
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        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
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      <SupplementalInformationDetail>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 11B</FormAndLineReferenceDesc>
        <ExplanationTxt>THE BOOKS AND RECORDS ARE MAINTAINED BY FAST'S TREASURER AND REVIEWED BY THE CFO AND THE VICE CHAIRPERSON. FAST'S TREASURER GIVES FAST'S BOOKS AND RECORDS TO AN OUTSIDE CPA FIRM TO PREPARE FAST'S FORM 990. ONCE COMPLETED THE FORM 990 IS PROVIDED TO THE TREASURER, CFO AND VICE CHAIRPERSON FOR REVIEW. THE TREASURER, CFO AND VICE CHAIRPERSON REVIEW THE RETURN IN GREAT DETAIL, ASKING CLARIFYING QUESTIONS AND SUGGESTING CHANGES. ONCE THE RECOMMENDED CHANGES HAVE BEEN INCORPORATED INTO THE RETURN, THE FORM 990 IS DISTRIBUTED TO ALL BOARD MEMBERS FOR QUESTIONS, COMMENTS, AND RECOMMENDED CHANGES. ONCE THE BOARD MEMBERS QUESTIONS HAVE BEEN ANSWERED AND ANY CHANGES INCORPORATED INTO THE RETURN, THE FORM 990 IS FILED.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 12C</FormAndLineReferenceDesc>
        <ExplanationTxt>BOARD MEMBERS ARE REQUIRED TO CERTIFY ON AN ANNUAL BASIS ANY INTEREST THAT COULD GIVE RISE TO A CONFLICT. IF A CONFLICT APPEARS TO HAVE ARISEN, FAST BOARD OF DIRECTORS MEET TO DISCUSS THE POTENTIAL CONFLICT OF INTEREST AND CONSULT LEGAL COUNSEL AND OTHER APPLICABLE THIRD-PARTY EXPERTS AS DEEMED NECESSARY.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 15</FormAndLineReferenceDesc>
        <ExplanationTxt>THE BOARD OBTAINED A WRITTEN COMPENSATION ANALYSIS FROM WILLIS TOWERS WATSON, WHO SPECIALIZES IN EXECUTIVE COMPENSATION ASSESSMENTS. THE BOARD REVIEWED THIS COMPENSATION ANALYSIS, THE JOB DESCRIPTION, AND THE CURRENT NEEDS OF THE FOUNDATION TO SET THE COMPENSATION LEVELS FOR THE COO AND CFO POSITION. ALL BOARD OF DIRECTORS, OFFICERS, AND SCIENTIFIC ADVISORY BOARD MEMBERS ARE NON-COMPENSATED VOLUNTEERS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>GOVERNING DOCUMENTS, THE CONFLICT OF INTEREST POLICY, AND THE FINANCIAL STATEMENTS ARE AVAILABLE UPON REQUEST AS WELL AS ON THE FOUNDATION'S WEBSITE.</ExplanationTxt>
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          <BusinessNameLine1Txt>AS2 BIO INC</BusinessNameLine1Txt>
        </RelatedOrganizationName>
        <USAddress>
          <AddressLine1Txt>35 VILLAGE ROAD SUITE 100</AddressLine1Txt>
          <CityNm>MIDDLETON</CityNm>
          <StateAbbreviationCd>MA</StateAbbreviationCd>
          <ZIPCd>01949</ZIPCd>
        </USAddress>
        <PrimaryActivitiesTxt>MANAGEMENT COMPANY</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>DE</LegalDomicileStateCd>
        <DirectControllingEntityName>
          <BusinessNameLine1Txt>FAST</BusinessNameLine1Txt>
        </DirectControllingEntityName>
        <EntityTypeTxt>C</EntityTypeTxt>
        <ShareOfTotalIncomeAmt>-34027</ShareOfTotalIncomeAmt>
        <ShareOfEOYAssetsAmt>708945</ShareOfEOYAssetsAmt>
        <OwnershipPct>0.62000</OwnershipPct>
        <ControlledOrganizationInd>0</ControlledOrganizationInd>
      </IdRelatedOrgTxblCorpTrGrp>
      <ReceiptOfIntAnntsRntsRyltsInd>0</ReceiptOfIntAnntsRntsRyltsInd>
      <GiftGrntOrCapContriToOthOrgInd>1</GiftGrntOrCapContriToOthOrgInd>
      <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>1</PerformOfServicesByOtherOrgInd>
      <SharingOfFacilitiesInd>0</SharingOfFacilitiesInd>
      <PaidEmployeesSharingInd>0</PaidEmployeesSharingInd>
      <ReimbursementPaidToOtherOrgInd>0</ReimbursementPaidToOtherOrgInd>
      <ReimbursementPaidByOtherOrgInd>0</ReimbursementPaidByOtherOrgInd>
      <TransferToOtherOrgInd>0</TransferToOtherOrgInd>
      <TransferFromOtherOrgInd>0</TransferFromOtherOrgInd>
      <TransactionsRelatedOrgGrp>
        <OtherOrganizationName>
          <BusinessNameLine1Txt>AS2 BIO</BusinessNameLine1Txt>
        </OtherOrganizationName>
        <TransactionTypeTxt>M</TransactionTypeTxt>
        <InvolvedAmt>1679065</InvolvedAmt>
        <MethodOfAmountDeterminationTxt>BOOK</MethodOfAmountDeterminationTxt>
      </TransactionsRelatedOrgGrp>
      <TransactionsRelatedOrgGrp>
        <OtherOrganizationName>
          <BusinessNameLine1Txt>MAVRIX BIO LLC</BusinessNameLine1Txt>
        </OtherOrganizationName>
        <TransactionTypeTxt>B</TransactionTypeTxt>
        <InvolvedAmt>2000000</InvolvedAmt>
        <MethodOfAmountDeterminationTxt>BOOK</MethodOfAmountDeterminationTxt>
      </TransactionsRelatedOrgGrp>
      <TransactionsRelatedOrgGrp>
        <OtherOrganizationName>
          <BusinessNameLine1Txt>AS2 BIO</BusinessNameLine1Txt>
        </OtherOrganizationName>
        <TransactionTypeTxt>B</TransactionTypeTxt>
        <InvolvedAmt>386761</InvolvedAmt>
        <MethodOfAmountDeterminationTxt>BOOK</MethodOfAmountDeterminationTxt>
      </TransactionsRelatedOrgGrp>
      <TransactionsRelatedOrgGrp>
        <OtherOrganizationName>
          <BusinessNameLine1Txt>TRANSFORMATX BIOTHERAPEUTICS LLC</BusinessNameLine1Txt>
        </OtherOrganizationName>
        <TransactionTypeTxt>B</TransactionTypeTxt>
        <InvolvedAmt>947303</InvolvedAmt>
        <MethodOfAmountDeterminationTxt>BOOK</MethodOfAmountDeterminationTxt>
      </TransactionsRelatedOrgGrp>
    </IRS990ScheduleR>
  </ReturnData>
</Return>