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        <Explanation>NET DECREASE IN 401(H) ACCOUNT -6,493,221.</Explanation>
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      <GeneralExplanation>
        <ReturnReference>FORM 990, PART VI, SECTION A, LINE 1</ReturnReference>
        <Explanation>AS OF MAY 2011, NORTHERN TRUST SERVES AS DIRECTED TRUSTEE OF THIS TRUST, THE PLAN SPONSOR IS EXELON CORPORATION. THE TRUST IS ADMINISTERED BY THE PLAN SPONSOR IN ACCORDANCE WITH THE TERMS OF THE TRUST AGREEMENT. THUS, THE TRUST HAS NO GOVERNING BODY THAT EXERCISES DISCRETION.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <ReturnReference>FORM 990, PART VI, SECTION A, LINE 6</ReturnReference>
        <Explanation>MEMBERS PARTICIPATE IN THE SPONSOR HEALTH BENEFIT PLANS AND RECEIVE MEDICAL AND DENTAL BENEFITS FROM THE FUNDED VEBA.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <ReturnReference>FORM 990, PART VI, SECTION B, LINE 11</ReturnReference>
        <Explanation>THE ORGANIZATION USES A CPA FIRM TO PREPARE FORM 990. THE RETURN IS REVIEWED BY EXELON ACCOUNTING, CORPORATE BENEFITS AND LEGAL DEPARTMENTS. THE RETURN IS REVIEWED BY THE PARTIES WHO ADMINISTER THE HEALTH AND WELFARE PLANS THAT ARE FUNDED BY THE ORGANIZATION AND MANAGE THE ASSETS OF THE ORGANIZATION. AS SUCH ALL RESPONSIBLE GOVERNING BODIES REVIEW AND APPROVE THE RETURN PRIOR TO FILING.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <ReturnReference>FORM 990, PART VI, SECTION B, LINE 12C</ReturnReference>
        <Explanation>THE PLAN HAS THE SAME WRITTEN CONFLICTS OF INTEREST POLICY, WRITTEN WHISTLEBLOWER POLICY, AND WRITTEN DOCUMENTATION, RETENTION AND DESTRUCTION POLICY AS THAT OF EXELON, THE EMPLOYER-PROVIDER OF THE PLAN.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <ReturnReference>FORM 990, PART VI, SECTION C, LINE 19</ReturnReference>
        <Explanation>THE ORGANIZATION MAKES ITS FORM 1024, FORM 990, GOVERNING DOCUMENTS, CONFLICT OF INTEREST POLICY AND FINANCIAL STATEMENTS AVAILABLE UPON REQUEST.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <ReturnReference>FORM 990 PART VII COLUMN B:</ReturnReference>
        <Explanation>AVERAGE HOURS WORKED PER WEEK DEVOTED TO POSITION AS TRUSTEE NORTHERN TRUST PROVIDES ADMINISTRATIVE SERVICES SUCH AS ACTING AS INVESTMENT MANAGER FOR THE NAMED ORGANIZATION. THESE SERVICES REQUIRE NUMEROUS INDIVIDUAL BANK EMPLOYEES' INVOLVEMENT IN THE ACTIVITIES OF THE ORGANIZATION, AND THUS CANNOT BE QUANTIFIED ON AN HOURLY BASIS. THEREFORE, THE TRUSTEE'S FEES ARE NOT BASED UPON AN HOURLY BASIS BUT ARE CALCULATED BASED UPON FACTORS SUCH AS THE MARKET VALUE OF THE ACCOUNT AND IN ACCORDANCE WITH OUR AGREEMENT WITH THE CLIENT.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <Identifier>CHANGES IN NET ASSETS OR FUND BALANCES:</Identifier>
        <ReturnReference>FORM 990, PART XI, LINE 5:</ReturnReference>
        <Explanation>NET UNREALIZED LOSSES ON INVESTMENTS: -10,569,915. NET DECREASE IN 401(H) ACCOUNT -6,493,221. TOTAL TO FORM 990, PART XI, LINE 5: -17,063,136.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <Explanation>THIS ORGANIZATION IS A VOLUNTARY EMPLOYEES' BENEFICIARY ASSOCIATIONS TRUST UNDER IRC 501(C)(9). THIS ORGANIZATION FUNDS HEALTHCARE BENEFITS PROVIDED UNDER CERTAIN HEALTH AND WELFARE PLANS SPONSORED BY EXELON CORPORATION FOR ITS RETIREES AND THEIR ELIGIBLE DEPENDENTS. THIS ORGANIZATION FOLLOWS EXELON'S CORPORATE POLICIES WHERE APPLICABLE INCLUDING PROPER DOCUMENTATION OF ALL ACTIONS TAKEN ON BEHALF OF THE PLAN.</Explanation>
      </GeneralExplanation>
    </IRS990ScheduleO>
    <IRS990ScheduleR documentId="RetDoc1043400001">
      <Form990ScheduleRPartI>
        <NameOfDisregardedEntity>
          <BusinessNameLine1>EXELON GENERATION CO LLC</BusinessNameLine1>
        </NameOfDisregardedEntity>
        <AddressUS>
          <AddressLine1>10 S DEARBORN 51ST FLOOR</AddressLine1>
          <City>CHICAGO</City>
          <State>IL</State>
          <ZIPCode>60603</ZIPCode>
        </AddressUS>
        <EIN>233064219</EIN>
        <PrimaryActivities>POWER GENERATION</PrimaryActivities>
        <LegalDomicileState>DE</LegalDomicileState>
        <DirectControllingEntityName>
          <BusinessNameLine1>EXELON CORPORATION</BusinessNameLine1>
        </DirectControllingEntityName>
      </Form990ScheduleRPartI>
      <Form990ScheduleRPartI>
        <NameOfDisregardedEntity>
          <BusinessNameLine1>EXELON NUCLEAR SECURITY LLC</BusinessNameLine1>
        </NameOfDisregardedEntity>
        <AddressUS>
          <AddressLine1>10 S DEARBORN 51ST FLOOR</AddressLine1>
          <City>CHICAGO</City>
          <State>IL</State>
          <ZIPCode>60603</ZIPCode>
        </AddressUS>
        <EIN>261248912</EIN>
        <PrimaryActivities>SECURITY TO EXELON'S NUCLEAR POWER PLANTS</PrimaryActivities>
        <LegalDomicileState>DE</LegalDomicileState>
        <DirectControllingEntityName>
          <BusinessNameLine1>EXELON CORPORATION</BusinessNameLine1>
        </DirectControllingEntityName>
      </Form990ScheduleRPartI>
      <Form990ScheduleRPartI>
        <NameOfDisregardedEntity>
          <BusinessNameLine1>EXELON BUSINESS SERVICES CO LLC</BusinessNameLine1>
        </NameOfDisregardedEntity>
        <AddressUS>
          <AddressLine1>10 S DEARBORN 51ST FLOOR</AddressLine1>
          <City>CHICAGO</City>
          <State>IL</State>
          <ZIPCode>60603</ZIPCode>
        </AddressUS>
        <EIN>233063219</EIN>
        <PrimaryActivities>PROVIDES SUPPORT TO OPERATING COMPANIES</PrimaryActivities>
        <LegalDomicileState>DE</LegalDomicileState>
        <DirectControllingEntityName>
          <BusinessNameLine1>EXELON CORPORATION</BusinessNameLine1>
        </DirectControllingEntityName>
      </Form990ScheduleRPartI>
      <Form990ScheduleRPartI>
        <NameOfDisregardedEntity>
          <BusinessNameLine1>PECO ENERGY COMPANY</BusinessNameLine1>
        </NameOfDisregardedEntity>
        <AddressUS>
          <AddressLine1>10 S DEARBORN 51ST FLOOR</AddressLine1>
          <City>CHICAGO</City>
          <State>IL</State>
          <ZIPCode>60603</ZIPCode>
        </AddressUS>
        <EIN>230970240</EIN>
        <PrimaryActivities>ELECTRIC DISTRIBUTION UTILITY</PrimaryActivities>
        <LegalDomicileState>DE</LegalDomicileState>
        <DirectControllingEntityName>
          <BusinessNameLine1>EXELON CORPORATION</BusinessNameLine1>
        </DirectControllingEntityName>
      </Form990ScheduleRPartI>
      <Form990ScheduleRPartI>
        <NameOfDisregardedEntity>
          <BusinessNameLine1>EXELON WIND LLC</BusinessNameLine1>
        </NameOfDisregardedEntity>
        <AddressUS>
          <AddressLine1>10 S DEARBORN 51ST FLOOR</AddressLine1>
          <City>CHICAGO</City>
          <State>IL</State>
          <ZIPCode>60603</ZIPCode>
        </AddressUS>
        <EIN>273687029</EIN>
        <PrimaryActivities>POWER GENERATION</PrimaryActivities>
        <LegalDomicileState>DE</LegalDomicileState>
        <DirectControllingEntityName>
          <BusinessNameLine1>EXELON CORPORATION</BusinessNameLine1>
        </DirectControllingEntityName>
      </Form990ScheduleRPartI>
      <Form990ScheduleRPartII>
        <NameOfDisregardedEntity>
          <BusinessNameLine1>PECO ENERY CO RETIREE LIFE INSURANCE TRUST</BusinessNameLine1>
        </NameOfDisregardedEntity>
        <AddressUS>
          <AddressLine1>10 S DEARBORN 51ST FLOOR</AddressLine1>
          <City>CHICAGO</City>
          <State>IL</State>
          <ZIPCode>60603</ZIPCode>
        </AddressUS>
        <EIN>251755732</EIN>
        <PrimaryActivities>VEBA</PrimaryActivities>
        <LegalDomicileState>PA</LegalDomicileState>
        <ExemptCodeSection>501(C)(9)</ExemptCodeSection>
        <PublicCharityStatus>N/A</PublicCharityStatus>
        <DirectControllingEntityName>
          <BusinessNameLine1>EXELON CORP</BusinessNameLine1>
        </DirectControllingEntityName>
        <ControlledOrg>0</ControlledOrg>
      </Form990ScheduleRPartII>
      <Form990ScheduleRPartIV>
        <NameOfRelatedOrg>
          <BusinessNameLine1>EXELON CORPORATION</BusinessNameLine1>
        </NameOfRelatedOrg>
        <AddressUS>
          <AddressLine1>10 S DEARBORN 51ST FLOOR</AddressLine1>
          <City>CHICAGO</City>
          <State>IL</State>
          <ZIPCode>60603</ZIPCode>
        </AddressUS>
        <EIN>222990190</EIN>
        <PrimaryActivity>GENERATION &amp; DISTRIBUTION</PrimaryActivity>
        <LegalDomicileState>DE</LegalDomicileState>
        <TypeOfEntity>C</TypeOfEntity>
      </Form990ScheduleRPartIV>
      <ReceiptOfIntAnnRentsRoyalties>0</ReceiptOfIntAnnRentsRoyalties>
      <GiftGrantOrCapContrToOtherOrg>0</GiftGrantOrCapContrToOtherOrg>
      <GiftGrantOrCapContrFrOtherOrg>0</GiftGrantOrCapContrFrOtherOrg>
      <LoansOrGuaranteesToOtherOrg>0</LoansOrGuaranteesToOtherOrg>
      <LoansOrGuaranteesFromOtherOrg>0</LoansOrGuaranteesFromOtherOrg>
      <SaleOfAssetsToOtherOrg>0</SaleOfAssetsToOtherOrg>
      <PurchaseOfAssetsFromOtherOrg>0</PurchaseOfAssetsFromOtherOrg>
      <ExchangeOfAssets>0</ExchangeOfAssets>
      <RentalOfFacilitiesToOtherOrgs>0</RentalOfFacilitiesToOtherOrgs>
      <RentalOfFacilitiesFrOtherOrgs>0</RentalOfFacilitiesFrOtherOrgs>
      <PerformOfServicesForOtherOrgs>0</PerformOfServicesForOtherOrgs>
      <PerformOfServicesByOtherOrgs>0</PerformOfServicesByOtherOrgs>
      <SharingOfFacilities>0</SharingOfFacilities>
      <SharingOfPaidEmployees>0</SharingOfPaidEmployees>
      <ReimbursementPaidToOtherOrg>0</ReimbursementPaidToOtherOrg>
      <ReimbursementPaidByOtherOrg>0</ReimbursementPaidByOtherOrg>
      <OtherTransferToOtherOrg>0</OtherTransferToOtherOrg>
      <OtherTransferFromOtherOrg>1</OtherTransferFromOtherOrg>
      <TransactionsRelatedOrgsTable>
        <NameOfOtherOrganization>
          <BusinessNameLine1>EXELON GENERATION CO LLC</BusinessNameLine1>
        </NameOfOtherOrganization>
        <TransactionType>R</TransactionType>
        <AmountInvolved>30678632</AmountInvolved>
        <MethodOfAmtDetermination>MAINTAINED RECORDS AT FMV</MethodOfAmtDetermination>
      </TransactionsRelatedOrgsTable>
      <TransactionsRelatedOrgsTable>
        <NameOfOtherOrganization>
          <BusinessNameLine1>EXELON NUCLEAR SECURITY LLC</BusinessNameLine1>
        </NameOfOtherOrganization>
        <TransactionType>R</TransactionType>
        <AmountInvolved>2443712</AmountInvolved>
        <MethodOfAmtDetermination>MAINTAINED RECORDS AT FMV</MethodOfAmtDetermination>
      </TransactionsRelatedOrgsTable>
      <TransactionsRelatedOrgsTable>
        <NameOfOtherOrganization>
          <BusinessNameLine1>EXELON BUSINESS SERVICES CO LLC</BusinessNameLine1>
        </NameOfOtherOrganization>
        <TransactionType>R</TransactionType>
        <AmountInvolved>3714726</AmountInvolved>
        <MethodOfAmtDetermination>MAINTAINED RECORDS AT FMV</MethodOfAmtDetermination>
      </TransactionsRelatedOrgsTable>
      <TransactionsRelatedOrgsTable>
        <NameOfOtherOrganization>
          <BusinessNameLine1>PECO ENERGY COMPANY</BusinessNameLine1>
        </NameOfOtherOrganization>
        <TransactionType>R</TransactionType>
        <AmountInvolved>26059452</AmountInvolved>
        <MethodOfAmtDetermination>MAINTAINED RECORDS AT FMV</MethodOfAmtDetermination>
      </TransactionsRelatedOrgsTable>
      <TransactionsRelatedOrgsTable>
        <NameOfOtherOrganization>
          <BusinessNameLine1>EXELON WIND LLC</BusinessNameLine1>
        </NameOfOtherOrganization>
        <TransactionType>R</TransactionType>
        <AmountInvolved>76919</AmountInvolved>
        <MethodOfAmtDetermination>MAINTAINED RECORDS AT FMV</MethodOfAmtDetermination>
      </TransactionsRelatedOrgsTable>
    </IRS990ScheduleR>
  </ReturnData>
</Return>