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        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
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      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Steve Maiorisi</PersonNm>
        <TitleTxt>Director</TitleTxt>
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        <CompensationBasedOnRltdOrgsAmt>99728</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
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        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>3396</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>0</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>10625</DeferredCompRltdOrgsAmt>
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        <NontaxableBenefitsRltdOrgsAmt>8522</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>0</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>187271</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Maria Papola Megdal</PersonNm>
        <TitleTxt>Director</TitleTxt>
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        <CompensationBasedOnRltdOrgsAmt>382875</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
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        <DeferredCompRltdOrgsAmt>38190</DeferredCompRltdOrgsAmt>
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        <NontaxableBenefitsRltdOrgsAmt>18150</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>0</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>534861</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Elizabeth Nabel</PersonNm>
        <TitleTxt>Director</TitleTxt>
        <BaseCompensationFilingOrgAmt>0</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>1357200</CompensationBasedOnRltdOrgsAmt>
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        <DeferredCompensationFlngOrgAmt>0</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>29700</DeferredCompRltdOrgsAmt>
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        <NontaxableBenefitsRltdOrgsAmt>11251</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>0</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>2579912</TotalCompensationRltdOrgsAmt>
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      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Peter J Stroup</PersonNm>
        <TitleTxt>Director (part year)</TitleTxt>
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        <CompensationBasedOnRltdOrgsAmt>207910</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
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        <DeferredCompensationFlngOrgAmt>0</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>31931</DeferredCompRltdOrgsAmt>
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        <NontaxableBenefitsRltdOrgsAmt>26073</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>0</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>302713</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Walter Armstrong</PersonNm>
        <TitleTxt>Co-Chair</TitleTxt>
        <BaseCompensationFilingOrgAmt>0</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>339284</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>39129</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>27190</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>0</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>25030</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>0</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>22385</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>0</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>453018</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Christopher Dunleavy</PersonNm>
        <TitleTxt>Co-Chair &amp; Treasurer</TitleTxt>
        <BaseCompensationFilingOrgAmt>0</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>728831</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>113220</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>138058</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>0</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>14850</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>0</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>1717</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>0</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>996676</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Dorothy Puhy</PersonNm>
        <TitleTxt>Treasurer (part year)</TitleTxt>
        <BaseCompensationFilingOrgAmt>0</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>685042</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>172998</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>66802</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>0</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>38190</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>0</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>6302</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>0</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>969334</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Michele Garvin</PersonNm>
        <TitleTxt>Clerk</TitleTxt>
        <BaseCompensationFilingOrgAmt>0</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>541028</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>188471</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>105011</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>0</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>21600</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>0</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>22175</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>0</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>878285</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Gretchen E May</PersonNm>
        <TitleTxt>President &amp; Executive Director</TitleTxt>
        <BaseCompensationFilingOrgAmt>0</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>187603</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>47153</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>121</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>0</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>21785</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>0</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>209</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>0</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>256871</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Andrew Cohn</PersonNm>
        <TitleTxt>Former President &amp; CEO</TitleTxt>
        <BaseCompensationFilingOrgAmt>259195</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
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        <DeferredCompensationFlngOrgAmt>0</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>0</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>259195</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
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        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part I, Line 3</FormAndLineReferenceDesc>
        <ExplanationTxt>Ms. May's compensation was set in advance by the LMEC Executive Committee, which had oversight for LMEC compensation matters. The Executive Committee reviewed and discussed the proposed compensation terms for the position and approved the compensation arrangements for the President and Executive Director. The Executive Committee deliberations were documented in minutes, and the LMEC members approved the hiring and compensation of Ms. May, which was contemporaneously documented in minutes.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part I, Line 4b</FormAndLineReferenceDesc>
        <ExplanationTxt>Various individuals included in Form 990, Part VII, participate in or receive payment from a supplemental non-qualified plan sponsored by related organizations. Each individual's participation in those plans arise in their capacity as employees or officers of those related organizations and are not compensation for services rendered to LMEC. Only the individuals mentioned below participated in or received compensation from non-qualified plans. Descriptions of the related-party non-qualified plans are as follows: Children's Hospital Corporation made contributions to the supplemental non-qualified retirement plan for the individual listed below. Contribution amounts are generally based on a percentage of compensation. Participants of the supplemental executive retirement plan are fully vested. All payments with respect to a participant's separation from service will be made in a single sum following the separation from service unless participant has elected to receive the accrued interest portion of his or her account in three annual installments. Michele Garvin, received in 2017, a contribution of $70,566. During the 2017 calendar year, Beth Israel Deaconess Medical Center was a participating employer in the Beth Israel Deaconess Medical Center 457(b) Plan. Pursuant to these plans, eligible employees receive certain retirement benefits and/or can defer part of their compensation. Under the definitions to this Form 990, these plans are considered supplemental nonqualified retirement plans. Amounts deferred by participants or received by participants and related to these plans are included in Form 990, Schoedule J, Part II, Column B(iii), Other Reportable Compensation, and/or Form 990, Schedule J, Part II, Column C, Deferred Compensation, in accordance with the instructions to the Form 990. The following individuals received deferred compensation from the above-described non-qualified retirement plans: Walter Armstrong received, during 2017, combined payments of $24,595. Dana Farber Cancer Institute (DFCI) offers a 457(f) retirement plan which is a nonqualified retirement plan that provides an additional retirement savings opportunity to participants in the qualified DFCI Retirement Plan whose annual compensation exceeds the federal limit on allowable compensation. Taxable amounts are included as reportable compensation in Schedule J, Part II, Column (B)(iii): Dorothy Puhy received, during 2017, contributions of $52,325. Maria Papola Megdal received, during 2017, contributions of $14,729.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleJ>
    <IRS990ScheduleO documentId="RetDoc1044400001">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section A, line 2</FormAndLineReferenceDesc>
        <ExplanationTxt>The following groups of two or three individuals have business relationships with one another which arise from each set of individuals' mutual affiliation with one of LMEC's Member organizations: -- William Johnston, member of the Beth Israel Deaconess Medical Center, Inc. (BIDMC) governing board, Walter Armstrong, Senior Vice President, Capital Engineering and Facilities of BIDMC, and Elizabeth Gerlach, Deputy General Counsel of BIDMC (Ms. Gerlach serves as an alternate BIDMC representative to the LMEC governing board and may attend and vote at meetings in the absence of either of the directors appointed by BIDMC); -- G. Marshall Moriarty, member of Brigham &amp; Women's Hospital, Inc. (BWH) governing board, Christopher Dunleavy, Senior Vice President and Chief Financial Officer of BWH, Elizabeth Nabel President of BWH, and Jack Higham, Office of General Counsel, Partners Healthcare (Mr. Higham serves as an alternate BWH representative to the LMEC governing board and may attend and vote at meetings in the absence of either of the directors appointed by BWH); -- Stephen R. Karp, member of Children's Hospital's governing board, Lisa Hogarty, Senior Vice President, Real Estate Planning and Development of Children's Hospital (Ms. Hogarty serves as an alternate Children's Hospital representative to the LMEC governing board and may attend and vote at meetings in the absence of either of the directors appointed by Children's), and Michele Garvin, Senior Vice President and General Counsel of Children's Hospital; -- John O'Connor, member of Dana-Farber Cancer Institute, Inc. (DFCI) governing board, Dorothy Puhy, Executive VP and Chief Operating Officer of DFCI, and Maria Papola Megdal, Vice President, Facilities Management and Real Estate of DFCI; and -- Douglas Garron, Managing Director of Energy and Facilities of Harvard University, Steve Maiorisi, Chief Campus Planning and Facilities Officer of Harvard University, and Peter Stroup, Director of Facilities of Harvard University.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section A, line 6</FormAndLineReferenceDesc>
        <ExplanationTxt>The Members of the Organization are Beth Israel Deaconess Medical Center, Inc., Brigham and Women's Hospital, Inc., Children's Medical Center Corporation, Dana-Farber Cancer Institute, Inc., Joslin Diabetes Center, Inc., and President and Fellows of Harvard College. At any special or regular meeting the Members may increase the number of Members and elect new Members to complete the number so fixed by a vote of majority of the Members then in office; or they may decrease the number of Members, but only to eliminate vacancies caused by the resignation, removal, or disqualification of one or more Members. Membership in the Organization shall be limited to organizations that are exempt from federal income taxation pursuant to the provisions of Section 501(c)(3) of the Internal Revenue Code. Each Member shall continue to be a Member until it dissolves, resigns, is removed, or becomes disqualified.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section A, line 7a</FormAndLineReferenceDesc>
        <ExplanationTxt>LMEC has six Member Corporations, each of which is a corporation that is exempt from federal income taxation pursuant to the provisions of Section 501(c)(3) of the Internal Revenue Code. Under the LMEC bylaws, each corporate Member appoints two directors to sit on the LMEC Governing Board, one from such Member's senior management and the other from the Member's governing board (except that President and Fellows of Harvard College, "Harvard," may appoint an alternate in lieu of a Member of the Harvard governing board), and each corporate Member may appoint an alternate to attend and vote at meetings of the Board of Directors in the absence of either of the directors it appoints. The bylaws provide that the Directors appointed by each Member jointly have one vote, and in the event of any disagreement between such directors, the vote of such Member shall be disregarded. An appointed Director may be suspended or removed with or without cause by the Member that appointed such director.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section A, line 7b</FormAndLineReferenceDesc>
        <ExplanationTxt>The authority of the Directors to exercise the following powers is conditioned upon approval by two-thirds of the total of the Members: a. To add new Members b. To change capital call obligations of the Members, if any c. To refinance or approve any unbudgeted debt instruments, bonds, notes, or guarantees d. To enter into or renegotiate any mortgages on or security interest in the Corporation's real property or physical plant, except for those mortgages or material liens entered into pursuant to previously approved financings. e. To add new customers f. To change auditors g. To file for bankruptcy h. To employ or terminate employment of the chief executive officer or chief financial officer of the Corporation. i. To make material changes in the sale or repurchase of energy from third parties j. To approve or make material changes to any standard user contract In addition to these reserved powers, the Members shall have such other powers and rights as the Directors may designate.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, line 11b</FormAndLineReferenceDesc>
        <ExplanationTxt>The Form 990, prepared by an independent public accounting firm, is reviewed by the President of Longwood Medical Energy Collaborative, Inc. ("LMEC"). The complete Form 990 is presented to the Audit Committee of LMEC for review and discussion. A copy of the complete return is then provided to each member of the LMEC Board of Directors prior to submission to the Internal Revenue Service.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, line 12c</FormAndLineReferenceDesc>
        <ExplanationTxt>Longwood Medical Energy Collaborative, Inc. (LMEC) has a conflict of interest policy which establishes that directors, officers, and other necessary individuals have an ongoing duty to disclose the existence of financial interests which may result in a conflict of interest. To administer the conflict of interest policy, annually LMEC distributes a copy of the policy along with a conflict of interest form. The conflict of interest form must be returned by each such individual annually to affirm that he or she (i) has received a copy of the conflict of interest policy, (ii) has read and understands the policy, and (iii) has agreed to comply with the policy. Any activity that requires action under the conflict of interest policy is subject to review and action through the Board of Directors and the organization's general counsel. Pursuant to the conflict of interest policy, certain activities which could create conflicts of interest are prohibited while other types of relationships are permitted, subject to compliance with disclosure and recusal requirements.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, line 15a</FormAndLineReferenceDesc>
        <ExplanationTxt>During the filing period, Gretchen May was paid by President and Fellows of Harvard College (Harvard) and served as the Longwood Medical Energy Collaborative, Inc. (LMEC) President and Executive Director during the year. Ms. May commenced that role on October 1, 2017, having previously served as a Director of LMEC since July 2011. The Executive Committee of LMEC had oversight for LMEC compensation matters. The Executive Committee reviewed and discussed the proposed compensation terms for the position and approved the compensation arrangements for the President and Executive Director. The Executive Committee deliberations were documented in minutes, and the LMEC Member Organizations also ratified, approved, and confirmed the hiring and compensation of the Executive Director. During the period covered by this filing, LMEC did not have any other officers or key employees.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section C, line 19</FormAndLineReferenceDesc>
        <ExplanationTxt>The Organization makes its governing documents, conflict of interest policy, and financial statements available to the public upon request.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VII, Section A:</FormAndLineReferenceDesc>
        <ExplanationTxt>Director Compensation: A majority of the Organization's directors are compensated by related organizations, as they serve as representatives of the Organization's supported organizations. However, the compensation reported in Part VII of Form 990 does not represent compensation for the individuals' services in their capacity as officers or directors of Longwood Medical Energy Collaborative. Rather, this compensation reflects remuneration for services those individuals performed in their capacity as full-time employees of those related organizations.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VII, Section A:</FormAndLineReferenceDesc>
        <ExplanationTxt>Alternate Board Members The Organization is listing in Part VII, Section A one or more alternate board members. According to the bylaws, alternate board members may be appointed by certain Member organizations of LMEC to have the power to vote on all matters that come before the governing body in the absence of a board member from their respective organization.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part IX, line 11g</FormAndLineReferenceDesc>
        <ExplanationTxt>Energy Conservation and Efficiency Services: Program service expenses 261,275. Management and general expenses 0. Fundraising expenses 0. Total expenses 261,275.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part XII, Line 2c:</FormAndLineReferenceDesc>
        <ExplanationTxt>Oversight of Audit The Organization has an audit committee that performs general oversight of the audit process. The audit process has not changed from the prior year.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
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          <BusinessNameLine1Txt>Beth Israel Deaconess Medical Center Inc</BusinessNameLine1Txt>
        </DisregardedEntityName>
        <USAddress>
          <AddressLine1Txt>330 Brookline Avenue</AddressLine1Txt>
          <CityNm>Boston</CityNm>
          <StateAbbreviationCd>MA</StateAbbreviationCd>
          <ZIPCd>02115</ZIPCd>
        </USAddress>
        <EIN>042103881</EIN>
        <PrimaryActivitiesTxt>Tertiary Care Academic Medical Center</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>MA</LegalDomicileStateCd>
        <ExemptCodeSectionTxt>501(c)(3)</ExemptCodeSectionTxt>
        <PublicCharityStatusTxt>Line 3</PublicCharityStatusTxt>
        <DirectControllingNACd>N/A</DirectControllingNACd>
        <ControlledOrganizationInd>0</ControlledOrganizationInd>
      </IdRelatedTaxExemptOrgGrp>
      <IdRelatedTaxExemptOrgGrp>
        <DisregardedEntityName>
          <BusinessNameLine1Txt>Joslin Diabetes Center Inc</BusinessNameLine1Txt>
        </DisregardedEntityName>
        <USAddress>
          <AddressLine1Txt>One Joslin Place</AddressLine1Txt>
          <CityNm>Boston</CityNm>
          <StateAbbreviationCd>MA</StateAbbreviationCd>
          <ZIPCd>02115</ZIPCd>
        </USAddress>
        <EIN>042203836</EIN>
        <PrimaryActivitiesTxt>Education Research Healthcare Facility</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>MA</LegalDomicileStateCd>
        <ExemptCodeSectionTxt>501(c)(3)</ExemptCodeSectionTxt>
        <PublicCharityStatusTxt>Line 3</PublicCharityStatusTxt>
        <DirectControllingNACd>N/A</DirectControllingNACd>
        <ControlledOrganizationInd>0</ControlledOrganizationInd>
      </IdRelatedTaxExemptOrgGrp>
      <IdRelatedTaxExemptOrgGrp>
        <DisregardedEntityName>
          <BusinessNameLine1Txt>Children's Hospital Corporation</BusinessNameLine1Txt>
        </DisregardedEntityName>
        <USAddress>
          <AddressLine1Txt>300 Longwood Avenue</AddressLine1Txt>
          <CityNm>Boston</CityNm>
          <StateAbbreviationCd>MA</StateAbbreviationCd>
          <ZIPCd>02115</ZIPCd>
        </USAddress>
        <EIN>042774441</EIN>
        <PrimaryActivitiesTxt>Education Research Healthcare Facility</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>MA</LegalDomicileStateCd>
        <ExemptCodeSectionTxt>501(c)(3)</ExemptCodeSectionTxt>
        <PublicCharityStatusTxt>Line 3</PublicCharityStatusTxt>
        <DirectControllingEntityName>
          <BusinessNameLine1Txt>Children's Medical Center Corp</BusinessNameLine1Txt>
        </DirectControllingEntityName>
        <ControlledOrganizationInd>0</ControlledOrganizationInd>
      </IdRelatedTaxExemptOrgGrp>
      <IdRelatedTaxExemptOrgGrp>
        <DisregardedEntityName>
          <BusinessNameLine1Txt>President and Fellows of Harvard College</BusinessNameLine1Txt>
        </DisregardedEntityName>
        <USAddress>
          <AddressLine1Txt>1033 Massachusetts Avenue 3rd Floor</AddressLine1Txt>
          <CityNm>Cambridge</CityNm>
          <StateAbbreviationCd>MA</StateAbbreviationCd>
          <ZIPCd>02138</ZIPCd>
        </USAddress>
        <EIN>042103580</EIN>
        <PrimaryActivitiesTxt>Education</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>MA</LegalDomicileStateCd>
        <ExemptCodeSectionTxt>501(c)(3)</ExemptCodeSectionTxt>
        <PublicCharityStatusTxt>Line 2</PublicCharityStatusTxt>
        <DirectControllingNACd>N/A</DirectControllingNACd>
        <ControlledOrganizationInd>0</ControlledOrganizationInd>
      </IdRelatedTaxExemptOrgGrp>
      <IdRelatedTaxExemptOrgGrp>
        <DisregardedEntityName>
          <BusinessNameLine1Txt>Dana Farber Cancer Institute Inc</BusinessNameLine1Txt>
        </DisregardedEntityName>
        <USAddress>
          <AddressLine1Txt>450 Brookline Avenue</AddressLine1Txt>
          <CityNm>Boston</CityNm>
          <StateAbbreviationCd>MA</StateAbbreviationCd>
          <ZIPCd>02115</ZIPCd>
        </USAddress>
        <EIN>042263040</EIN>
        <PrimaryActivitiesTxt>Education Research Healthcare Facility</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>MA</LegalDomicileStateCd>
        <ExemptCodeSectionTxt>501(c)(3)</ExemptCodeSectionTxt>
        <PublicCharityStatusTxt>Line 7</PublicCharityStatusTxt>
        <DirectControllingNACd>N/A</DirectControllingNACd>
        <ControlledOrganizationInd>0</ControlledOrganizationInd>
      </IdRelatedTaxExemptOrgGrp>
      <IdRelatedTaxExemptOrgGrp>
        <DisregardedEntityName>
          <BusinessNameLine1Txt>Brigham &amp; Women's Hospital Inc</BusinessNameLine1Txt>
        </DisregardedEntityName>
        <USAddress>
          <AddressLine1Txt>75 Francis Street</AddressLine1Txt>
          <CityNm>Boston</CityNm>
          <StateAbbreviationCd>MA</StateAbbreviationCd>
          <ZIPCd>02115</ZIPCd>
        </USAddress>
        <EIN>042312909</EIN>
        <PrimaryActivitiesTxt>Please see Schedule R, Part VII, Supplemental Information</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>MA</LegalDomicileStateCd>
        <ExemptCodeSectionTxt>501(c)(3)</ExemptCodeSectionTxt>
        <PublicCharityStatusTxt>Line 3</PublicCharityStatusTxt>
        <DirectControllingNACd>N/A</DirectControllingNACd>
        <ControlledOrganizationInd>0</ControlledOrganizationInd>
      </IdRelatedTaxExemptOrgGrp>
      <ReceiptOfIntAnntsRntsRyltsInd>0</ReceiptOfIntAnntsRntsRyltsInd>
      <GiftGrntOrCapContriToOthOrgInd>0</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>1</RentalOfFcltsFromOthOrgInd>
      <PerformOfServicesForOthOrgInd>1</PerformOfServicesForOthOrgInd>
      <PerformOfServicesByOtherOrgInd>1</PerformOfServicesByOtherOrgInd>
      <SharingOfFacilitiesInd>1</SharingOfFacilitiesInd>
      <PaidEmployeesSharingInd>1</PaidEmployeesSharingInd>
      <ReimbursementPaidToOtherOrgInd>1</ReimbursementPaidToOtherOrgInd>
      <ReimbursementPaidByOtherOrgInd>1</ReimbursementPaidByOtherOrgInd>
      <TransferToOtherOrgInd>1</TransferToOtherOrgInd>
      <TransferFromOtherOrgInd>0</TransferFromOtherOrgInd>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Schedule R, Part II, Brigham &amp; Women's Hospital:</FormAndLineReferenceDesc>
        <ExplanationTxt>Throughout Brigham Health, every decision we make is guided by our vision of a healthier world, and delivered through our mission of maintaining and restoring health through leadership in compassionate care, scientific discovery and education.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleR>
  </ReturnData>
</Return>