Registration Nos. 333-59601
                                                                       33-57658
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                       SECURITIES AND EXCHANGE COMMISSION


                       __________________________________



                         POST-EFFECTIVE AMENDMENT NO. 1

                                       TO

                                    FORM S-3

                             REGISTRATION STATEMENTS

                        UNDER THE SECURITIES ACT OF 1933


                      ____________________________________


                        Constellation Energy Group, Inc.
             (Exact Name of Registrant as Specified in its Charter)


                                    Maryland
                            (State of Incorporation)


                                   52-1964611
                      (I.R.S. Employer Identification No.)


                         David A. Brune, Vice President
                39 W. Lexington Street, Baltimore, Maryland 21201
                                 (410) 234-5511
     (Address, including Zip Code, and Telephone Number, including Area Code
       of Registrant's Principal Executive Offices and Agent for Service)

               
          
         Pursuant  to  Rule  429  under  the  Securities  Act  of  1933,   this
 Registration  Statement also  serves as  a  post-effective  amendment  to  the
 Registrant's  Registration Statements on Form S-3 (Registration Nos. 33-57658 
 and 333-59601).


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                                EXPLANATORY NOTE

     This Post-Effective Amendment No. 1 relates to the issuance of shares of
common stock, no par value, of Constellation Energy Group, Inc. which were
originally registered by Baltimore Gas and Electric Company on Form S-3.  
Constellation Energy Group, Inc. will succeed Baltimore Gas and Electric Company
as registrant of various effective registration statements filed with the
Securities and Exchange Commission.  The registration fee in respect of the
common stock was paid at the time of the original filing of the Registration 
Statements on Form S-3 by Baltimore Gas and Electric Company.







The information in this prospectus is not complete and may be changed.  We may
not sell these securities until the registration statement filed with the  
Securities and Exchange commission is effective.  This prospectus is not an
offer to sell these securities and it is not soliciting an offer to buy these
securities in any state where the offer or sale is not permitted.



                  Subject to completion dated March 25, 1999
   


[GRAPHIC OMITTED]


3,731,600 Shares
Common Stock

                                                Constellation Energy Group, Inc.
                                                          39 W. Lexington Street
                                                      Baltimore, Maryland  21201
                                                                  (410) 234-5000

________________________________________________________________________________
                             
                              P R O S P E C T U S
________________________________________________________________________________

     Constellation  Energy  may sell  shares of common  stock  from time to time
through the agent under our continuous offering program. We will receive all the
proceeds  from the sale of the stock,  less  expenses,  after paying the agent a
commission  of not more than 5 cents per share.  The  proceeds  we receive  will
depend on the number of shares we sell and the market  price of our stock at the
time of sale. We also may sell shares of common stock in fixed price  offerings,
special  offerings  or block  transactions.  For these  types of sales,  we will
prepare and distribute a prospectus supplement which will describe the sale. Our
common  stock is listed on the New York,  Chicago  and Pacific  stock  exchanges
under the symbol "CEG." 

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

     We urge you to  carefully  read this  prospectus  which will  describe  the
specific terms of the offering before you make your investment decision.


     Neither the  Securities and Exchange  Commission  nor any state  securities
commission has approved or  disapproved  of these  securities or passed upon the
adequacy or accuracy of this prospectus. Any representation to the contrary is a
criminal offense.



                              SALOMON SMITH BARNEY


                                    - Agent -

______________________________, 1999






                                TABLE OF CONTENTS

   

                                                                            Page

Constellation Energy...................................................       3
Use of Proceeds........................................................       3
Common Stock Dividends and Price Range.................................       4
Description of Common Stock............................................       5
Plan of Distribution...................................................       5
Legal Opinions.........................................................       6
Experts..................................................... ..........       6
Where You Can Find More Information.......................... ..........      6



                           FORWARD-LOOKING STATEMENTS

     We make  statements in this  prospectus and the documents we incorporate by
reference that are considered  forward-looking  statements within the meaning of
the Securities Act of 1933 and the  Securities  Exchange Act of 1934.  Sometimes
these  statements will contain words such as "believes,"  "expects,"  "intends,"
"plans" and other similar  words.  These  statements  are not  guarantees of our
future  performance and are subject to risks,  uncertainties and other important
factors that could cause our actual performance or achievements to be materially
different from those we project. These risks, uncertainties and factors include:

- -  general economic, business and regulatory conditions;
- -  energy supply and demand;
- -  competition;
- -  federal and state regulations;
- -  availability, terms and use of capital;
- -  nuclear and environmental issues;
- -  weather;
- -  industry restructuring and cost recovery (including the potential effect of 
   stranded investments).
- -  commodity price risk, and
- -  year 2000 readiness

Given  these  uncertainties,  you  should  not  place  undue  reliance  on these
forward-looking statements. Please see the documents we incorporate by reference
for  more  information  on  these  factors.  These  forward-looking   statements
represent our estimates and assumptions only as of the date of this prospectus.

    
 
                                      2


   

CONSTELLATION ENERGY

Constellation  Energy became the holding  company for Baltimore Gas and Electric
Company  ("BGE")  on  __________,   1999.  Constellation  Energy  owns  all  the
outstanding shares of common stock of BGE and the subsidiaries formerly owned by
BGE.

BGE is a public utility that has served Central Maryland for over 180 years. BGE
produces,  purchases and sells  electricity and purchases,  transports and sells
natural gas. BGE also jointly owns and operates two electric  generating  plants
and one hydroelectric plant in Pennsylvania.

Constellation Energy owns the stock of several other companies primarily engaged
in diversified energy-services businesses. They are:

- -  Constellation Power Source, Inc. - our wholesale power marketing and trading
   business.

- -  Constellation Power, Inc. and subsidiaries - our power projects business;

- -  Constellation Energy Source, Inc. - our energy products and services
   business; and

- -  BGE Home Products & Services,  Inc. and subsidiaries - our home products,
   commercial  building  systems,  and residential and small  commercial gas 
   retail marketing business.

Constellation Energy also has two other subsidiaries:

- -  Constellation Investments, Inc. - our financial investments business; and

- -  Constellation Real Estate Group, Inc. - our real estate and senior living
   facilities business.

    


USE OF PROCEEDS

   

Based on our current plans and estimates, we  will use the net proceeds from the
sale of common stock for general corporate  purposes,  including  investments in
our  subsidiaries  and repayment of commercial paper  borrowings used to finance
capital  expenditures and operations.  We may, however, use the net proceeds for
other  purposes  if we find  it  necessary.  If we do not  use the net  proceeds
immediately,  we will  temporarily  invest them in short term,  interest bearing
obligations.  For current  information  on our  commercial  paper  balances  and
average interest rate, see our most recent Form 10-K and 10-Q. See Where You Can
Find More Information.
                                       3
    





                     COMMON STOCK DIVIDENDS AND PRICE RANGE

   

When our Board of Directors  declares  dividends they will also  set  the record
dates and payment dates. As was the practice  with  BGE  the  record  dates  are
expected to be the 10th of March, June, September and December, and we expect to
mail dividends to each shareholder on or  about the 1st of  January, April, July
and October.

The range of the high and low sale prices of BGE's common stock, reported by The
Wall Street  Journal,  as  New  York Stock Exchange-Composite  Transactions  and
dividends paid per share were as follows:





                                                                 
                                        Price Range               Dividends Paid
                               -------------------------------          Per
                                    High              Low              Share
                               ----------------    -------------   -------------
                                                             

1996                                                                      
First Quarter...................   29 1/2            26 1/8            .39
Second Quarter..................   28 5/8            25 1/2            .39
Third Quarter...................   28 5/8            25                .40
Fourth Quarter..................   28 3/4            25 3/4            .40

1997
First Quarter...................   28                26 1/2            .40
Second Quarter..................   27                24 3/4            .40
Third Quarter ..................   28 1/16           26                .41
Fourth Quarter .................   34 5/16           25 13/16          .41
                                           
1998
First Quarter..................    34 1/8            29 3/4            .41
Second Quarter.................    32 15/16          29 1/4            .41
Third Quarter..................    33 5/8            29 5/16           .42
Fourth Quarter.................    35 1/4            30 7/8            .42

1999
First Quarter..................    31 1/8           25 1/8             .42
(through March 19, 1999)




The book value per share of BGE's common stock at December 31, 1998  was $19.98.
The  last   reported   sale  price of BGE's common stock on the New  York  Stock
Exchange on March 19, 1999 was $25 3/16.

    

                                       4




DESCRIPTION OF COMMON STOCK

Below is a brief summary of your rights as holders of our common stock. You  can
find a complete  description  of these rights  in  our Charter.  See  Where  You
Can Find More Information.

Dividend Rights

   

We will pay dividends on our common stock when declared by our Board of
Directors. However, we must first pay all dividends and any redemption payments
due on our preferred stock (if any become outstanding) before paying common
stock dividends.

    

Voting Rights

   

Holders of our common stock are entitled to one vote per share on all matters on
which shareholders vote. There are no cumulative voting rights.

    


Liquidation

   

Our common stock has no par value. If we liquidate or dissolve, you will share
equally in any assets remaining after full payment of liabilities to our
creditors and the liquidation value per share plus accrued dividends due to
holders of our preferred stock (if any become outstanding).

    

General

You do not have any preemptive or special rights to purchase any shares of
common stock we may issue at a later date. We have not issued any securities
convertible into shares of our common stock. In addition, as holders of common
stock, you have no redemption, conversion or sinking fund rights. When issued to
you, the common stock will be legally issued, fully paid and nonassessable.

PLAN OF DISTRIBUTION

The common stock will be sold on a continuing basis through our agent, Salomon
Smith Barney. The agent agrees to use its reasonable efforts to solicit
purchases for the period of its appointment. We will receive all the proceeds
from the sale of the stock, after paying the agent a commission of no more than
5 cents per share and before deducting expenses of approximately $150,000. In
addition, we have agreed to reimburse the agent for certain of its expenses in
connection with the sale of the common stock.

The agent will sell the shares on the New York Stock Exchange, or on any other
exchange on which the shares are listed, at prevailing market prices through (a)
ordinary brokers' transactions or (b) in block transactions. In block
transactions, the agent may purchase all or a portion of the shares as principal
for its own account and resell them.

The agent may also sell the shares in a fixed price offering. If this happens,
we will sell shares to the agent for its own account at a negotiated price
(which is related to the prevailing market price), and the agent may form a
group of dealers to participate with it in reselling the shares to you. For this
type of sale, we will prepare and distribute a prospectus supplement which will
describe the offering price and the number of shares sold and customary
distributors' or sellers' commissions payable, if any.

The agent may also sell the shares by conducting a special offering or exchange
distribution in accordance with the rules of the stock exchange on which the
shares are listed. We would also prepare and distribute a prospectus supplement
for these types of offerings.

General Information

Dealers and agents that participate in the distribution of the common stock may
be underwriters as defined in the Securities Act of 1933 (1933 Act), and any
discounts or commissions received by them from us and any profit on the resale
of the common stock by them may be treated as underwriting discounts and
commissions under the 1933 Act.

                                       5




We have an agreement with the agent to indemnify it from certain civil
liabilities, including liabilities under the 1933 Act or to contribute with
respect to payments which the agent may be required to make. We may have similar
agreements with dealers and other agents.

Dealers and agents may engage in transactions with, or perform services for, us
or our subsidiaries in the ordinary course of their business.

In connection with any fixed price offering, exchange distribution, or special
offering, the selling group, which would include dealers who enter into an
underwriting agreement with us, may engage in transactions which stabilize,
maintain or otherwise affect the market price of the common stock. Specifically,
the selling group may overallot in connection with the offering, creating a
short position. In addition, they may bid for, and purchase, the securities in
the open market to cover shorts or to stabilize the price of the common stock.
Finally, the selling group may reclaim selling concessions allowed for
distributing common stock in the offering, if the selling group repurchases
previously distributed common stock in the market to cover overallotments or to
stabilize the price of the common stock. Any of these activities may stabilize
or maintain the market price of the common stock above independent market
levels. The selling group is not required to engage in any of these activities,
and may stop any of the activities at any time.


LEGAL OPINION

One of our lawyers will issue an opinion regarding certain legal matters in
connection with the common stock offered pursuant to this prospectus. Cahill
Gordon & Reindel ( a partnership including a professional corporation), New
York, NY will issue an opinion for any underwriters, dealers or agents. Cahill
Gordon & Reindel will rely on the opinion of our lawyers as to matters of
Maryland law and the applicability of the Public Utility Holding Company Act of
1935.

EXPERTS

PricewaterhouseCoopers LLP, independent accountants, audited our annual
financial statements and schedule incorporated by reference in this prospectus
and elsewhere in the registration statement. These documents are incorporated by
reference herein in reliance upon the authority of PricewaterhouseCoopers LLP as
experts in accounting and auditing.

   


WHERE YOU CAN FIND
MORE INFORMATION

Constellation Energy will file annual, quarterly and current reports, proxy
statements and other information with the SEC. Prior to Constellation Energy
becoming BGE's holding company, reports, statements and other information were
filed by BGE under the name "Baltimore Gas and Electric Company." You may read
and copy any document filed by BGE or Constellation Energy at the SEC's public
reference room at 450 Fifth Street, N. W. Washington, D.C. 20549. Please call
the SEC at 1-800-SEC-0330 for further information on the public reference room.
The SEC maintains an internet site at http://www.sec.gov that contains reports,
proxy and information statements regarding issuers (including Constellation
Energy and BGE) that file documents with the SEC electronically. Constellation
Energy's SEC filings may also be obtained from our web site at
http://www.constellationenergy.com.

This prospectus is part of a registration statement that we filed with the SEC.
In addition, the SEC allows us to "incorporate by reference" the information we
file with them, which means that we can disclose important information to you by
referring you to those documents. The information incorporated by reference is
considered to be part of this prospectus, and later information that we file
with the SEC will automatically update and supersede this information. We
incorporate by reference the documents listed below and any future filings made
with the SEC under Sections 13(a), 13(c), 14, or 15(d) of the Securities

                                       6



Exchange Act of 1934 until we sell all the common stock.
                                  
- -    BGE's Annual Report on Form 10-K for the year ended December 31, 1998.

You may request a copy of these filings, at no cost, by writing us at:

      Shareholder Services
      Constellation Energy Group, Inc.
      39 W. Lexington Street
      Baltimore, Maryland 21201
      410-783-5920

You should rely only on the information incorporated by reference or provided in
this prospectus or any prospectus supplement. We have not authorized anyone else
to provide you with different information. We are not making an offer of the
common stock in any state where the offer is not permitted. You should not
assume that the information in this prospectus or any prospectus supplement is
accurate as of any date other than the date on the front of those documents.

    

                                       7


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                               [GRAPHIC OMITTED]






                        Constellation Energy Group, Inc.

                                3,731,600 Shares

                                  Common Stock



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

                                   PROSPECTUS

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



                              Salomon Smith Barney



                             _________________,1999




    

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                                     PART II

                     INFORMATION NOT REQUIRED IN PROSPECTUS
   


Item 14.  Other Expenses of Issuance and Distribution.
     Securities and Exchange Commission Registration Fee.............. $28,410*
     Services of Independent Accountants......................... ....  45,000**
     Listing Fees.....................................................  15,000*
     Legal Fees and Expenses..........................................  35,000**
     Transfer Agent and Registrar Fees................................   5,000**
     Printing and Delivery Expenses...................................  10,000**
     Miscellaneous Expenses...........................................  11,590**
                                                                       ---------
     Total.............................................................$150,000

         --------------
         *  Previously paid
         ** Estimated
    


Item 15.  Indemnification of Directors and Officers.

     The  following  description  of  indemnification   allowed  under  Maryland
statutory law is a summary rather than a complete description. Reference is made
to Section 2-418 of the Corporations  and  Associations  Article of the Maryland
Annotated  Code,  which is incorporated  herein by reference,  and the following
summary is qualified in its entirety by such reference.

     By a Maryland  statute,  a Maryland  corporation may indemnify any director
who was or is a party or is  threatened  to be made a party  to any  threatened,
pending,  or completed  action,  suit or proceeding,  whether  civil,  criminal,
administrative or investigative  ("Proceeding") by reason of the fact that he is
a present or former  director of the  corporation  and any person  who,  while a
director of the corporation, is or was serving at the request of the corporation
as a  director,  officer,  partner,  trustee,  employee,  or  agent  of  another
corporation,  partnership,  joint venture, trust, other enterprise,  or employee
benefit  plan  ("Director").  Such  indemnification  may be  against  judgments,
penalties,  fines,  settlements and reasonable expenses actually incurred by him
in  connection  with the  Proceeding  unless  it is  proven  that (a) the act or
omission  of  the  Director  was  material  to the  matter  giving  rise  to the
Proceeding and (i) was committed in bad faith,  or (ii) was the result of active
and deliberate  dishonesty;  or (b) the Director  actually  received an improper
personal  benefit in money,  property,  or  services;  or (c) in the case of any
criminal action or proceeding,  the Director had reasonable cause to believe his
act or omission was unlawful.  However,  the  corporation  may not indemnify any
Director in connection  with a Proceeding by or in the right of the  corporation
if the Director has been adjudged to be liable to the corporation. A Director or
officer who has been successful in the defense of any Proceeding described above
shall be indemnified against reasonable expenses incurred in connection with the
Proceeding.  The  corporation  may not  indemnify  a Director  in respect of any
Proceeding  charging  improper  personal  benefits to the  Director in which the
Director  was  adjudged  to be liable on the basis  that  personal  benefit  was
improperly received.

                                      II-1




Notwithstanding the above provisions, a court of appropriate jurisdiciton,  upon
application of  the  Director  or o fficer,  may  order  indemnification  if  it
determines that  in  view  of all the  entitle  to   indemnification;   however,
indemnification  with   respect   to   any  Proceeding by or in the right of the
corporation or  in w hich liability was  adjudged  on the  basis  that  personal
benefit  was  improperly received  shall be limited to  expenses.  A corporation
may  advance reasonable  expenses  to  a  Director  under certain circumstances,
including a written undertaking by or on behalf of such Director to repay he
amount if it shall ultimately be determined that the standard of conduct
necessary for indemnification by the corporation has not been met.

                                  
     A  corporation  may  indemnify  and  advance  expenses to an officer of the
corporation  to the  same  extent  that it may  indemnify  Directors  under  the
statute.

     The  indemnification  and advancement of expenses provided or authorized by
this statute may not be deemed exclusive of any other rights, by indemnification
or otherwise,  to which a Director or officer may be entitled under the charter,
by-laws, a resolution of shareholders or directors, an agreement or otherwise.

     A corporation  may purchase and maintain  insurance on behalf of any person
who is or was a Director or officer,  whether or not the corporation  would have
the power to  indemnify  a  Director  or  officer  against  liability  under the
provision of this section of Maryland law.  Further,  a corporation  may provide
similar protection, including a trust fund, letter of credit or surety bond, not
inconsistent with the statute.

   


         Article Eighth of the Company's Charter reads as follows:

         " (a)    (i)  The Corporation shall indemnify


             (A) its Directors and Officers,  whether serving the corporation or
at its request any other entity, to the full extent required or permitted by the
general laws of the State of Maryland,  now or hereafter in force, including the
advance of expenses,  under the procedures  and to the full extent  permitted by
law, and

             (B)  other  employees  and  agents,  to such  extent  as  shall  be
 authorized  by the  Board of  Directors  or the  Corporation's  by-laws  and be
 permitted by law.

            (ii) The foregoing rights of indemnification  shall not be exclusive
of any other rights to which those seeking indemnification may be entitled.

           (iii) The Board of Directors  may take such action as is necessary to
carry out these indemnification  provisions and is expressly empowered to adopt,
approve  and amend  from time to time such  by-laws,  resolutions  or  contracts
implementing such provisions or such further indemnification arrangements as may
be permitted by law. No amendment of the Charter of the Corporation or repeal of

                                      II-2



any of its provisions shall limit or eliminate the right to indemnification prov
ided hereunder with respect to any act or omission occurring prior to such amend
ment or repeal.
                        
                  (b) To the fullest extent  permitted by Maryland  statutory or
decisional  law,  as  amended or  interpreted,  no  director  or Officer of this
Corporation  shall be personally  liable to the Corporation or its  stockholders
for money damages.  No amendment of the Charter of the  Corporation or repeal of
any of its  provisions  shall limit or  eliminate  the  limitation  on liability
provided to Directors and Officers hereunder with respect to any act or omission
occurring prior to such amendment or repeal."

         Article V of the Company's By-Laws reads as follows:

         "The Corporation shall indemnify all directors,  Officers and employees
to the fullest extent permitted by the general laws of the State of Maryland and
shall  provide  indemnification  expenses  in advance  to the  extent  permitted
thereby.  The Corporation will follow the procedures  required by applicable law
in   determining   persons   eligible   for   indemnification   and  in   making
indemnification payments and advances.

                  The  indemnification  and advance of expenses  provided by the
Charter and these by-laws  shall not be deemed  exclusive of any other rights to
which a person  seeking  indemnification  or advance of expenses may be entitled
under any law (common or statutory),  or any agreement,  vote of stockholders or
disinterested  Directors or other provision that is consistent with law, both as
to action in his or her official  capacity and as to action in another  capacity
while  holding  office  or  while  employed  by  or  acting  as  agent  for  the
corporation,  shall continue in respect of all events  occurring  while a person
was a Director  or  Officer  after  such  person has ceased to be a Director  or
Officer,  and shall  inure to the benefit of the estate,  heirs,  executors  and
administrators  of such  person.  All rights to  indemnification  and advance of
expenses under the Charter of the  Corporation  and hereunder shall be deemed to
be a  contract  between  the  corporation  and each  Director  or Officer of the
Corporation  who serves or served in such capacity at any time while this by-law
is in effect.  Nothing  herein  shall  prevent  the  amendment  of this  by-law,
provided  that no  such  amendment  shall  diminish  the  rights  of any  person
hereunder with respect to events occurring or claims made before its adoption or
as to claims made after its adoption in respect of events  occurring  before its
adoption.  Any  repeal  or  modification  of this  by-law  shall  not in any way
diminish any rights to  indemnification  or advance of expenses of such Director
or Officer or the obligations of the Corporation  arising hereunder with respect
to events  occurring,  or claims made, while this by-law or any provision hereof
is in force."

    

         The  Directors  and  officers of the  Company are covered by  insurance
indemnifying them against certain liabilities which might be incurred by them in
their  capacities  as such,  including  certain  liabilities  arising  under the


                                      II-3



Securities Act of 1933. The premium for this insurance is paid by the Company.
 
   
                                   
         Also,  see  indemnification  provisions  in the  Form of  Sales  Agency
Agreement which is Exhibit 1(a) to this Post Effective Amendment.

    

Item 16.  Exhibits.
   


         Reference  is made to the  Exhibit  Index  filed as a part of this Post
Effective Amendment.

    

Item 17.  Undertakings.

(a)  The undersigned Registrant hereby undertakes:

                  (1) To file,  during any  period in which  offers or sales are
         being made, a post-effective amendment to this Registration Statement:

                      (i) To include any  prospectus  required by Section  10(a)
                  (3) of the  Securities  Act of 1933;

                           (ii) To reflect in the prospectus any facts or events
                  arising after the effective date of the Registration Statement
                  (or the most recent  post-effective  amendment thereof) which,
                  individually  or in the  aggregate,  represent  a  fundamental
                  change  in the  information  set  forth  in  the  Registration
                  Statement.  Notwithstanding  the  foregoing,  any  increase or
                  decrease in volume of securities  offered (if the total dollar
                  value of  securities  offered  would not exceed that which was
                  registered)  and any deviation from the low or high end of the
                  estimated  maximum offering range may be reflected in the form
                  of  prospectus  filed  with the  Commission  pursuant  to Rule
                  424(b) if, in the  aggregate,  the changes in volume and price
                  represent  no more than a 20% change in the maximum  aggregate
                  offering price set forth in the  "Calculation  of Registration
                  Fee" table in the effective registration statement;
                                      
                           (iii)  To  include  any  material   information  with
                  respect to the plan of distribution  not previously  disclosed
                  in the  Registration  Statement or any material change to such
                  information in the Registration Statement;

                  Provided, however, that paragraphs (a)(1)(i) and (a)(1)(ii) do
         not apply if the  Registration  Statement is on Form S-3,  Form S-8, or
         Form  F-3  and  the   information   required   to  be   included  in  a
         post-effective  amendment by those  paragraphs is contained in periodic
         reports  filed  with  or  furnished  to  the  Securities  and  Exchange
         Commission by the Registrant pursuant to Section 13 or Section 15(d) of
         the Securities  Exchange Act of 1934 that are incorporated by reference
         in the Registration Statement.
                                     
                                      II-4



                  (2) That, for the purpose of determining  any liability  under
         the Securities Act of 1933, each such post-effective amendment shall be
         deemed to be a new  Registration  Statement  relating to the securities
         offered therein, and the offering of such securities at that time shall
         be deemed to be the initial bona fide offering thereof.

                  (3) To remove from  registration by means of a  post-effective
         amendment any of the securities being registered which remain unsold at
         the termination of the offering.

(b)  The  undersigned   Registrant  hereby  undertakes  that,  for  purposes  of
determining  any liability  under the Securities Act of 1933, each filing of the
Registrant's  annual  report  pursuant to Section  13(a) or Section 15(d) of the
Securities  Exchange  Act of 1934  (and,  where  applicable,  each  filing of an
employee  benefit  plan's  annual  report  pursuant  to  Section  15(d)  of  the
Securities  Exchange  Act of 1934)  that is  incorporated  by  reference  in the
Registration  Statement  shall  be  deemed  to be a new  Registration  Statement
relating to the securities offered therein,  and the offering of such securities
at that time shall be deemed to be the initial bona fide offering thereof.

(c) Insofar as indemnification  for liabilities arising under the Securities Act
of 1933 may be permitted to Directors,  officers and controlling  persons of the
Registrant  pursuant  to the  provisions  described  under  Item  15  above,  or
otherwise, the Registrant has been advised that in the opinion of the Securities
and  Exchange  Commission  such  indemnification  is  against  public  policy as
expressed in the Act and is, therefore, unenforceable. In the event that a claim
for  indemnification  against  such  liabilities  (other than the payment by the
Registrant of expenses  incurred or paid by a Director,  officer or  controlling
person of the  Registrant  in the  successful  defense  of any  action,  suit or
proceeding)  is  asserted by such  Director,  officer or  controlling  person in
connection with the securities being registered,  the Registrant will, unless in
the opinion of its counsel the matter has been settled by controlling precedent,
submit  to a  court  of  appropriate  jurisdiction  the  question  whether  such
indemnification  by it is against public policy as expressed in the Act and will
be governed by the final adjudication of such issue.

                                      II-5





                                   SIGNATURES

   


         Pursuant  to  the   requirements   of  the   Securities  Act  of  1933,
Constellation  Energy  Group,  Inc.,  the  Registrant,  certifies  that  it  has
reasonable  grounds to believe that it meets all of the  requirements for filing
on Form S-3 and has duly  caused  this Post-Effective  Amendment  No. 1 to this
Registration Statement to be signed on its behalf by the undersigned,  thereunto
duly authorized, in the City of Baltimore,  State of Maryland on the 25th day of
March, 1999.

                                               CONSTELLATION ENERGY GROUP, INC.
                                               (Registrant)

    

                                               By:    /s/ David A. Brune  
                                                      -------------------
                                                          David A. Brune
                                                          Vice President

   

         Pursuant to the requirements  of the Securities Act of 1933, this Post-
Effective  Amendment No. 1 to this Registration  Statement has been signed below
by the following persons in the capacities and on the dates indicated.

    


        Signature                       Title                    Date
       ----------                     --------                  ------

Principal executive
officer and director:

   

* Charles W. Shivery              Chairman of the         March 25, 1999
                                  Board, President
                                  and Director
                           


Principal financial
and accounting officer:



/s/ David A. Brune                 Vice President,         March 25, 1999
- -------------------                Secretary and                                
   David A. Brune                  Director
                          


/s/ Thomas E. Ruszin, Jr.         Treasurer and            March 25, 1999
- -------------------------         Director         
    Thomas E. Ruszin, Jr.   


*By: /s/ David A. Brune
    --------------------
     David A. Brune, Attorney-in-Fact

    


                                      II-6




                                   
                                     
                                  EXHIBIT INDEX
   

Exhibit
Number
- -------
 1                -   Form  of  Sales  Agency  Agreement,  
                      including  Form  of  Volume  and  Pricing
                      Parameters and Form of Terms Agreement.

 4(a)*            -   Amended and Restated  Articles of Incorporation of
                      Constellation  Energy Group, Inc.  (Designated  as 
                      Exhibit  3.1 to  Post-Effective  Amendment  No.1 to the
                      Registration Statement on Form S-4 filed March 3, 1999,
                      File No. 33-64799.)

 4(b)*            -   By-Laws of  Constellation  Energy  Group,  Inc. 
                      Designated  as Exhibit 3.2 to Post-Effective  Amendment
                      No.1 to the Registration  Statement on Form S-4 filed
                      March 3, 1999, File No. 33-64799.)

 4(c)             -   Form of Common Stock Certificate.

 5                -   Opinion of Company Counsel as to legality.

 23(a)            -   Consent of PricewaterhouseCoopers LLP, Independent 
                      Public Accountants.                    

 23(b)            -   Consent of Company Counsel (included in Exhibit 5).

 24               -   Power of Attorney.

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

       *  Incorporated by reference.


                                      II-7