UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                              Washington, DC 20549
                                    FORM 11-K


               [X] ANNUAL REPORT PURSUANT TO SECTION 15(d) OF THE
                         SECURITIES EXCHANGE ACT OF 1934


                   For the fiscal year ended December 31, 1999


                                       OR


             [ ] TRANSITION REPORT PURSUANT TO SECTION 15(d) OF THE
                         SECURITIES EXCHANGE ACT OF 1934



                         Commission file number: 1-1401



                               PECO Energy Company
                              Employee Savings Plan
                            (Full title of the plan)




                               PECO Energy Company
                                 P. O. Box 8699
                               2301 Market Street
                             Philadelphia, PA 19101
           (Name of the issuer of the securities held pursuant to the
            plan and the address of its principal executive offices)



                              REQUIRED INFORMATION


FINANCIAL STATEMENTS

     Statements of Net Assets Available for Benefits as of December 31, 1999 and
     1998

     Statement  of Changes in Net Assets  Available  for  Benefits for the Years
     Ended December 31, 1999 and 1998


EXHIBITS

         Consent of Independent Accountants


CONTENTS
                                                                           Pages
                                                                           -----

Report of Independent Accountants                                              2

Financial Statements:
     Statements of Net Assets Available for Benefits,
         as of December 31, 1999 and 1998                                      3

     Statements of Changes in Net Assets Available for
         Benefits for the years ended December 31, 1999 and 1998               4

     Notes to Financial Statements                                          5-10

Supplemental Schedules:
     Schedule of Assets Held for Investment Purposes as of
         December 31, 1999, Schedule H, Part IV, Item 4i, Form 5500           11

List of Exhibits                                                              12

Signature                                                                     13




                        Report of Independent Accountants


To the Participants and Administrator of the
PECO Energy Company Employee Savings Plan:

In our  opinion,  the  accompanying  statements  of  net  assets  available  for
benefits,  and the related  statements  of changes in net assets  available  for
benefits present fairly, in all material respects,  the net assets available for
benefits  of the PECO  Energy  Company  Employee  Savings  Plan (the  "Plan") at
December 31, 1999 and 1998, and the changes in net assets available for benefits
for the years then ended,  in conformity with  accounting  principles  generally
accepted in the United States. These financial statements are the responsibility
of the Plan's  management;  our responsibility is to express an opinion on these
financial  statements  based on our  audits.  We  conducted  our audits of these
statements  in  accordance  with auditing  standards  generally  accepted in the
United  States,  which  require  that we plan and  perform  the  audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement.  An audit includes examining, on a test basis, evidence supporting
the  amounts  and  disclosures  in  the  financial  statements,   assessing  the
accounting  principles  used and significant  estimates made by management,  and
evaluating the overall  financial  statement  presentation.  We believe that our
audits provide a reasonable basis for the opinion expressed above.

Our audits  were  conducted  for the  purpose of forming an opinion on the basic
financial statements taken as a whole. The supplemental  schedule of Assets Held
for Investment  Purposes as of December 31, 1999,  Schedule H, Part IV, Item 4i,
Form 5500 is  presented  for the  purpose of  additional  analysis  and is not a
required part of the basic financial statements but is supplementary information
required by the  Department of Labor's Rules and  Regulations  for Reporting and
Disclosure  under the Employee  Retirement  Income  Security  Act of 1974.  This
supplemental  schedule  is the  responsibility  of the  Plan's  management.  The
supplemental  schedule has been subjected to the auditing  procedures applied in
the audits of the basic  financial  statements  and, in our  opinion,  is fairly
stated in all material  respects in relation to the basic  financial  statements
taken as a whole.



/s/PricewaterhouseCoopers LLP

Philadelphia, PA 19103
June 26, 2000


                                       2

                    PECO ENERGY COMPANY EMPLOYEE SAVINGS PLAN

                 Statement of Net Assets Available for Benefits
                        as of December 31, 1999 and 1998

                                              1999                1998
                                         ------------        ------------

Investments                              $812,725,928        $687,323,082
                                         ------------        ------------

Net assets available for benefits        $812,725,928        $687,323,082
                                         ============        ============

                       See notes to financial statements.

                                        3



                    PECO ENERGY COMPANY EMPLOYEE SAVINGS PLAN

            Statement of Changes in Net Assets Available for Benefits
                 for the years ended December 31, 1999 and 1998

                                               1999                  1998
                                          -------------         -------------
Additions:
   Employee contributions                 $  32,677,666         $  31,934,765
   Employer contributions                     7,112,506             6,655,284
                                          -------------         -------------

        Total contributions                  39,790,172            38,590,049

   Investment income:
      Interest                                3,918,621             3,167,891

      Dividends                              54,898,793            27,654,438

   Net appreciation in fair value
        of investments                       70,936,190           125,540,832

   Interest on loan repayments                1,183,195             1,106,290

                                          -------------         -------------

                                            170,726,971           196,059,500

Deductions:
   Distributions                            (45,324,125)          (29,135,458)

                                          -------------         -------------


Net additions                               125,402,846           166,924,042

Net assets available for benefits:
   Beginning of year                        687,323,082           520,399,040
                                          -------------         -------------

   End of year                            $ 812,725,928         $ 687,323,082
                                          =============         =============


                       See notes to financial statements.

                                        4

                    PECO ENERGY COMPANY EMPLOYEE SAVINGS PLAN

                          Notes to Financial Statements


1.   Description of the PECO Energy Company Employee Savings Plan:

     The following  description of the PECO Energy Company Employee Savings Plan
     (Plan) provides only general information.  Participants should refer to the
     Plan agreement for a complete description of the Plan's provisions.

     General - The Plan is a trusteed  defined  contribution  plan. The Plan was
     formed on January 1, 1984 for the purpose of allowing eligible employees of
     PECO Energy Company and subsidiaries  (the Company) to reduce their taxable
     income pursuant to Section 401(k) of the Internal Revenue Code. The Plan is
     subject to the provisions of the Employee Retirement Income Security Act of
     1974 (ERISA).

     All employees classified as "regular," "part-time" or "probationary" become
     eligible to  participate  in the Plan  immediately  upon  completion of six
     months of service.

     Contributions - Participants  elect to have the Company make  contributions
     to the Plan on their behalf. Such contributions are made by authorizing the
     Company to withhold  from the  participant's  salary an amount equal to the
     contribution to be made. Participants may elect to authorize the Company to
     contribute from 1% to 17% of their base salary  depending upon their salary
     level, up to certain IRS limits.

     Effective  January 1, 1997, the Plan was amended to reflect the addition of
     employer  matching   contributions.   The  Company  will  make  a  matching
     contribution of 50 cents on each dollar of employee  contributions up to 4%
     of an employee's  base salary  deposited  into the Plan.  Effective July 1,
     1999,  the Company's  matching  contribution  was increased  from 4% to 5%.
     Employees are always fully vested on employer contributions.

     Effective  October  1,  1997,  Fidelity  Investments  assumed  the role and
     responsibility of Record Keeper and Trustee for the Plan.

     Participants may elect that their  contributions be invested in one or more
     of the  following  generic  fund  categories  - Growth,  Growth and Income,
     Balanced,  Equity  Income,  Small  Capitalization  Growth,  Foreign,  Money
     Market, Fixed Income, or Company Stock. (See Note 3)

     By giving notice to the Plan Record Keeper and subject to rules established
     by the Plan Administrator, participants may suspend or change the amount of
     their  contributions  and exchange their  investments  among the investment
     funds.

     Distributions  and  exchanges  can be made on a daily  basis  provided  the
     market is open and the request is confirmed  by the Record  Keeper prior to
     4:00 p.m. EST.

                                       5

                    PECO ENERGY COMPANY EMPLOYEE SAVINGS PLAN

                          Notes to Financial Statements

1.   Description of the PECO Energy Company Employee Savings Plan, Continued:

     Participant  Accounts - Each  participant's  account is  credited  with the
     participant's contribution, the Company's contribution and an allocation of
     Plan earnings.

     Payment of Benefits - Upon termination of service a participant  receives a
     lump-sum amount equal to the value in his or her account.

     Participant  Loans  -  The  Plan  allows   participants  to  obtain  loans.
     Participants  may borrow up to 50% of their account  balances  subject to a
     minimum  of $500 and a maximum  of  $50,000.  Loans  have terms of up to 30
     years for the  purchase  of a primary  residence  or one to four  years for
     other  purposes  and  bear  interest  at  rates   determined  by  the  Plan
     Administrator  based  on  similar  rates  charged  by  regional  commercial
     lenders.  Loans are  repayable  in equal  installments  by means of payroll
     deductions.  A participant  may not have more than one loan  outstanding at
     any time or take more than one loan in a plan year.


2.   Summary of Significant Accounting Policies:

     Valuation of Investments and Income Recognition
     -----------------------------------------------
     Investments  in mutual  funds are valued at the reported net asset value on
     the last day of the year.  The Fidelity  Money Market Fund is valued at the
     cost of contributions made plus earnings less withdrawals.  The PECO Energy
     Common Stock Fund is valued  primarily  using the  Company's  closing stock
     price. The insurance contracts are benefit-responsive guaranteed investment
     contracts and are valued at contract value.  Contract value  represents the
     cost of contributions made under the contract plus earnings at the contract
     rate less withdrawals.  Purchases and sales of investments are reflected on
     a trade-date basis. Dividend income is recorded when declared payable.

     Net Appreciation/(Depreciation) in Investments
     ----------------------------------------------
     The Plan presents in the  statement of changes in net assets  available for
     benefits  the net  appreciation/(depreciation)  in the  fair  value  of its
     investments  which  consists  of the  realized  gains  or  losses  and  the
     unrealized appreciation/(depreciation) on those investments.

     Distributions
     -------------
     Distributions are recorded when paid.


                                       6


                    PECO ENERGY COMPANY EMPLOYEE SAVINGS PLAN

                          Notes to Financial Statements

2.   Summary of Significant Accounting Policies, Continued:

     Concentration of Credit Risk
     ----------------------------
     The Plan invests in benefit-responsive guaranteed investment contracts with
     two insurance companies and is subject to credit risk with respect to these
     insurance  companies.  This  risk  is  mitigated  by the  fact  that  these
     companies are rated A and A+ by A.M. Best.

     Use of Estimates
     ----------------
     The  preparation  of financial  statements  in  conformity  with  generally
     accepted  accounting  principles  requires management to make estimates and
     assumptions  that affect the reported  amounts of assets,  liabilities  and
     changes  therein,  and  disclosure  of contingent  assets and  liabilities.
     Actual results could differ from those estimates.

     Risk and Uncertainties
     ----------------------
     The Plan  provides for various  investment  options in any  combination  of
     stocks, bonds, fixed income securities,  mutual funds, and other investment
     securities.  Investment  securities are exposed to various  risks,  such as
     interest rate, market and credit.  Due to the level of risk associated with
     certain  investment  securities  and the level of  uncertainty  related  to
     changes in the value of investment  securities,  it is at least  reasonably
     possible  that  changes in risks in the near term would  materially  affect
     participants' account balances and the amounts reported in the statement of
     net assets  available  for  benefits  and the  statement  of changes in net
     assets available for benefits.


3.   Investments:

     The Plan investments consist of the following funds:

     Growth - The growth  mutual  fund  invests  primarily  in U.S.  and foreign
     common stocks of companies that are considered  undervalued or out of favor
     and whose products show potential for improvement.  Investments can include
     any type of security  that may produce  capital  growth.  The goal of these
     funds is to provide capital growth over the long-term.

     Growth and Income - The growth and income mutual fund invests  primarily in
     common stocks, focusing on larger, more established companies.  Investments
     are spread out across many different kinds of companies and industries. The
     goal of these  funds is to  provide  capital  growth  and  income  over the
     long-term.

                                       7


                    PECO ENERGY COMPANY EMPLOYEE SAVINGS PLAN

                          Notes to Financial Statements

3.   Investments, Continued:

     Small  Capitalization  -  The  small  capitalization  growth  fund  invests
     primarily in stocks of companies which have market  capitalization  of less
     than $1 billion at the time of investment.  The fund tries to keep at least
     one-third of its assets in stocks of companies with market  capitalizations
     of $550 million or less and also invests up to 25% of its assets in foreign
     securities.  This  fund's  goal  is to  provide  capital  growth  over  the
     long-term.

     Equity  Income  - The  equity  income  mutual  fund  invests  primarily  in
     attractively priced,  dividend paying,  income-producing equity securities;
     including common and preferred  stocks,  convertible  securities,  and debt
     securities  (bonds).  The goal of this fund is to invest for capital growth
     and current income.

     Foreign - The foreign fund invests  primarily in common stocks of companies
     in any foreign country,  developed or developing.  The goal of this fund is
     to provide capital growth over the long-term by investing internationally.

     Money  Market  Fund - The  money  market  fund  invests  primarily  in high
     quality, investment grade, short-term, U.S. dollar denominated money market
     securities of domestic and foreign issuers.  Investments include short-term
     corporate  obligations,  U.S. government  obligations,  and certificates of
     deposit.  The goal of this fund is to preserve  participants'  investments,
     maintain a stable price, and provide current income.

     Fixed  Income  Fund - This  fund  is  comprised  of  both  contracted  rate
     investments  through  a  managed  income  portfolio  as well  as  insurance
     contracts.  The contract rate is  established  at the  commencement  of the
     contract and remains  fixed  (except for certain  conditions)  at that rate
     until maturity.  The contract rate reflects market and other  conditions at
     the commencement of the contract.

     Balanced Fund - The balanced fund invests primarily in a diversified mix of
     common and  preferred  stocks,  and  investment  grade  bonds.  The fund is
     diversified across many sectors and industries. The goal of this fund is to
     provide  regular  income,  conservation of principal and an opportunity for
     long-term growth of principal and income.

     PECO Energy Common Stock Fund - The Company stock fund invests in primarily
     PECO  Energy  Company  common  stock  and  a  small  amount  of  short-term
     investments  which  enables  participants  to buy or sell without the usual
     trade settlement period of individual stock transactions.

                                       8

                    PECO ENERGY COMPANY EMPLOYEE SAVINGS PLAN

                          Notes to Financial Statements

3.   Investments, Continued:

     As of December 31, 1999 and 1998, respectively, the Plan held the following
     investments,  each of which  accounted  for more  than 5% of the  total net
     assets available for benefits:

          Investments                              1999                 1998
          -----------                         -------------        -------------

          Legg Mason NAV Value Trust Fund     $ 331,945,229        $ 249,649,394
          Fidelity Contrafund                   207,589,326          183,395,100
          Putnam Growth & Income Fund A          69,122,232           78,782,668

     During 1999 and 1998, the Plan's investments (including gains and losses on
     investments  bought and sold, as well as held during the year)  appreciated
     by $70,936,190 and $125,540,832, respectively, as follows:

                                                   1999                 1998
                                              -------------        -------------

          Mutual Funds                        $  75,902,582        $ 112,782,821
          Common Stock                           (4,966,392)          12,758,011
                                              -------------        -------------

          Total                               $  70,936,190        $ 125,540,832
                                              =============        =============

     As of December  31, 1999 and 1998,  respectively,  the Plan held  insurance
     contracts  with  interest rate ranges of 6.30% to 7.13% and 6.30% to 7.70%,
     respectively.

4.   Plan Termination:

     While it is the  Company's  intention  to  continue  the Plan in  operation
     indefinitely, the Company may terminate the Plan in whole or in part at any
     time.  Any such  termination,  partial  termination  or  discontinuance  of
     contributions  shall be effected  only upon  condition  that such action is
     taken as shall render it impossible  for any part of the assets of the Plan
     to be used for, or diverted to,  purposes other than the exclusive  benefit
     of the Plan participants and their beneficiaries.


                                       9



                    PECO ENERGY COMPANY EMPLOYEE SAVINGS PLAN

                          Notes to Financial Statements

5.   Tax Status:

     The Internal  Revenue  Service has determined and informed the Company that
     the Plan is  qualified  under  Sections  401(a) and 401(k) of the  Internal
     Revenue  Code and that the Plan is exempt  from  federal  income  tax under
     Section  501(a) by letter dated April 15,  1995.  The Plan has been amended
     since receiving the original  determination  letter,  however,  the Company
     believes  that the Plan is  designed  and is  currently  being  operated in
     compliance with the applicable requirements of the Internal Revenue Code.

6.   General and Administrative Expenses:

     All administrative fees are paid by the Company on behalf of the Plan.


                                       10




                                             PECO ENERGY COMPANY EMPLOYEE SAVINGS PLAN

                                          Schedule of Assets Held for Investment Purposes
                                                      as of December 31, 1999
                                              Schedule H, Part IV, Item 4i, Form 5500

                                                                                                                     e. Current
a.   b. Identity of Issuer, Lessor Similar Party         c. Description of Investment               d. Cost             Value
- ---  -----------------------------------------------  ------------------------------------------   --------------  ----------------

                                                                                                       
     Legg Mason NAV Value Trust                       Mutual Fund                                  $ 219,939,040    $  331,945,229
*    Fidelity Contrafund                              Mutual Fund                                    184,210,351       207,589,326
     Putnam Fund                                      Mutual Fund                                     78,163,986        69,122,232
     Spartan                                          Mutual Fund                                     19,726,619        24,960,256
     Franklin Small Capitalization Fund               Mutual Fund                                     11,996,439        17,793,289
     Putnam Equity Income Fund                        Mutual Fund                                      2,489,813         2,196,170
*    Fidelity Retirement Money Market                 Mutual Fund                                     33,045,196        33,045,196
     Dodge & Cox Balanced Fund                        Mutual Fund                                     21,262,495        20,305,136
*    Managed Income Portfolio II                      Mutual Fund                                     35,349,000        35,349,000
     Continental Assurance Company (1997)             Insurance Contract maturing 12/29/01, 7.13%      9,206,963         9,206,963
     Continental Assurance Company (1996)             Insurance Contract maturing 12/29/00, 6.30%     13,849,729        13,849,729
     Principal Mutual Life Insurance Company (1995)   Insurance Contract maturing 12/30/99, 7.70%            295               295
     Templeton Foreign Fund                           Mutual Fund                                      3,675,674         4,121,993
*    PECO Energy Company                              Common stock                                    19,262,912        27,741,632
     Participant Loans                                Rates ranged from 6.30% to 8.75%                        --        15,499,482
                                                                                                   -------------     -------------
                                                                                                   $ 652,178,512     $ 812,725,928
                                                                                                   =============     =============
<FN>
 * - Denotes parties in interest
</FN>






                                       11

                                    EXHIBITS


List of Exhibits:
- ----------------

Exhibit 23.1 - Consent of Independent Accountants











                                       12



                                    SIGNATURE



     Pursuant to the  requirements  of the Securities  Exchange Act of 1934, the
     trustees (or other persons who  administer  the plan) have duly caused this
     annual report to be signed by the undersigned hereunto duly authorized.




                                          By: /s/ J. Barry Mitchell
                                          --------------------------------------
                                          J. Barry Mitchell
                                          Vice President - Finance and Treasurer
                                          Plan Administrator






                                       13