SECURITIES AND EXCHANGE COMMISSION
                     Washington, D.C. 20549



                            Form 8-K


                          CURRENT REPORT


               Pursuant to Section 13 or 15(d) of
              the Securities Exchange Act of 1934


Date of Report (Date of earliest event reported): May 27, 1999




Commission    Registrant; State of Incorporation;      IRS Employer
File Number       Address; and Telephone Number      Identification No.
- -----------   ----------------------------------    -------------------

1-11375       UNICOM CORPORATION                        36-3961038
         (an Illinois corporation)
         37th Floor, 10 South Dearborn Street
         Post Office Box A-3005
         Chicago, Illinois 60690-3005
         312/394-7399


1-1839        COMMONWEALTH EDISON COMPANY               36-0938600
         (an Illinois corporation)
         37th Floor, 10 South Dearborn Street
         Post Office Box 767
         Chicago, Illinois 60690-0767
         312/394-4321






Item 5.  Other Events


Commonwealth Edison Company ("ComEd"), a subsidiary of Unicom
Corporation, issued a news release on May 27, 1999 (a copy of
which is filed as an exhibit to this report and is hereby
incorporated by reference) announcing that the Illinois
legislature passed a bill which modifies certain provisions of
the Illinois Electric Service Customer Choice and Rate Relief Law
of 1997.  The bill requires the signature of the Governor of
Illinois to be enacted into law.

Forward-Looking Statement:  The statement in the attached  press
release regarding projected earnings per share is a forward-
looking statement that involves risks and uncertainties.  Actual
results could differ materially as a result of such factors as
(a) unforeseen developments in the market for electricity in
Illinois resulting from regulatory changes, the influence of
developments in the regulatory environments in other Midwestern
states, adverse weather conditions and changes in the overall
economy, any or all of which may affect ComEd's sales of
electricity, and (b) the capacity factor of ComEd's nuclear
generating stations, which may affect ComEd's electricity
generation and purchased power costs.



                           SIGNATURES



    Pursuant to the requirements of the Securities Exchange Act
of 1934, the registrants have duly caused this report to be
signed on their behalf by the undersigned thereunto duly
authorized.



                                      UNICOM CORPORATION
                                          (Registrant)


Date: May 27, 1999        By:           John C. Bukovski
                                    ------------------------
                                        John C. Bukovski
                                     Senior Vice President





                                   COMMONWEALTH EDISON COMPANY
                                          (Registrant)


Date: May 27, 1999       By:            John C. Bukovski
                                    -------------------------
                                        John C. Bukovski
                                     Senior Vice President



                    EXHIBIT INDEX


Exhibit
Number         Description of Exhibit


1.   None

2.   None

4.   None

16.  None

17.  None

20.  None

23.  None

24.  None

27.  None

99.  News release dated May 27, 1999 issued by Commonwealth
     Edison Company