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      <OtherExpensesGrp>
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      <CYMinus4YrEndwmtFundGrp />
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        <ExplanationTxt>The independent board members act as the compensation committee and have in place a formal written process to evaluate and set the compensation of the CEO and other officers.</ExplanationTxt>
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    </IRS990ScheduleJ>
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        <SharingOfRevenuesInd>false</SharingOfRevenuesInd>
      </BusTrInvolveInterestedPrsnGrp>
      <BusTrInvolveInterestedPrsnGrp>
        <NameOfInterested>
          <PersonNm>Hamilton Brook Smith Reynolds</PersonNm>
        </NameOfInterested>
        <RelationshipDescriptionTxt>David Brook, partner</RelationshipDescriptionTxt>
        <TransactionAmt>23008</TransactionAmt>
        <TransactionDesc>legal fees</TransactionDesc>
        <SharingOfRevenuesInd>false</SharingOfRevenuesInd>
      </BusTrInvolveInterestedPrsnGrp>
    </IRS990ScheduleL>
    <IRS990ScheduleO documentId="IRS990ScheduleO">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>990, PART VI, SECTION A, LINE 2 - FAMILY RELATIONSHIP</FormAndLineReferenceDesc>
        <ExplanationTxt>MELINA FAN AND KENNETH FAN ARE SIBLINGs. MELINA FAN AND BENJIE CHEN ARE MARRIED.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>990, PART VI, SECTION B, LINE 11 - REVIEW PROCESS OF FORM 990</FormAndLineReferenceDesc>
        <ExplanationTxt>FORM 990 WAS REVIEWED BY MANAGEMENT ALONG WITH THE AUDITED FINANCIAL STATEMENTS. A FULL COPY OF FORM 990 IS PROVIDED TO ALL BOARD MEMBERS FOR REVIEW PRIOR FILING TO THE IRS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>990, PART VI, SECTION B, LINE 12 - CONFLICT OF INTEREST POLICY</FormAndLineReferenceDesc>
        <ExplanationTxt>ADDGENE, INC. HAS A CONFLICT OF INTEREST POLICY IN PLACE. ALL OFFICERS, DIRECTORS AND KEY EMPLOYEES ARE REQUIRED TO DISCLOSE ANNUALLY any INTERESTS THAT COULD GIVE RISE to CONFLICTS. INQUIRES ARE MADE DURING BOARD OF DIRECTOR MEETINGS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>990, PART VI, SECTION B, LINE 15 - PROCESS FOR DETERMINING COMPENSATION</FormAndLineReferenceDesc>
        <ExplanationTxt>ADDGENE, INC.'S INDEPENDENT BOARD MEMBERS REVIEWED AND DETERMINED THE COMPENSATION OF ALL OFFICERS ANNUALLY.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>990, PART VI, SECTION C, LINE 19 - ORGANIZATION DOCUMENTS</FormAndLineReferenceDesc>
        <ExplanationTxt>ADDGENE, INC.'S GOVERNING DOCUMENTS, CONFLICT OF INTEREST POLICY, AND FINANCIAL STATEMENTS are AVAILABLE TO THE PUBLIC UPON REQUEST.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>990, PART XI, LINE 9 - OTHER CHANGES IN NET ASSETS</FormAndLineReferenceDesc>
        <ExplanationTxt>Foreign currency translation (loss) (1,307)</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>