SECURITIES AND EXCHANGE COMMISSION

                              WASHINGTON, DC 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)  September 21, 1998

                                 HSB GROUP, INC.
             (Exact name of registrant as specified in its charter)

          Connecticut             001-13135            06-1475343
(State or other jurisdiction    (Commission         (IRS Employer
      of incorporation)         File Number)     Identification No.)

      One State Street, Hartford, Connecticut        06102-5024
     (Address of principal executive offices)       (Zip Code)

 Registrant's telephone number, including area code - (860)722-1866





     Item 5. Other Events - On September  21, 1998 the Board of Directors of HSB
     Group,  Inc.  (the  "Company")  approved the adoption of a new  shareholder
     rights plan to replace the plan that was set to expire on November 28, 1998
     (the  "Expiration  Date").  The new plan is  substantially  similar  to the
     expiring  plan that was adopted in 1988 and is  designed to deter  coercive
     takeover  tactics and  otherwise  encourage  third  parties  interested  in
     acquiring the Company to negotiate with the Board of Directors.

     Pursuant to the new Rights  Agreement  between  the Company and  BankBoston
     N.A., as rights agent,  (the "Rights  Agreement")  the Board has declared a
     dividend of one right for each share of common stock, without par value, of
     the Company  outstanding  on the Expiration  Date.  Each of the rights will
     permit  shareholders to buy one two-hundredth of a share of preferred stock
     at a price of $ 162. The rights are  generally  not  excercisable  until an
     acquiror obtains a 15 percent or greater ownership in the Company.  In such
     an event,  the rights of shareholders  other than the acquiror will entitle
     the  holder  to  purchase   shares  of  the  Company  (or,   under  certain
     circumstances,  of the  acquiror)  at a 50  percent  discount.  The  Rights
     Agreement  provides  that  Employers  Reinsurance  Corporation  will not be
     deemed  an  acquiror  in the  event of the  conversion  of the  Convertible
     Capital  Securities it holds into common stock of the Company  (which would
     currently   constitute   approximately   15.5  percent  of  the   Company's
     outstanding  shares)  unless  and  until  it  acquires  1  percent  or more
     additional  shares.  The new rights expire in ten years and are  redeemable
     for $.01 prior to the acquisition of 15 percent or more of the common stock
     of the Company.

     The foregoing  description  of the Rights  Agreement does not purport to be
     complete and is qualified  by  reference to the Rights  Agreement  attached
     hereto as an exhibit, which is incorporated herein by reference.


     Item 7. Financial Statements and Exhibits

     (c) Exhibits

     Exhibit No.                Description
     ----------                 -----------
      4                         Rights Agreement dated as of 
                                November 28, 1998 between HSB Group, Inc. and
                                BankBoston, N.A., which includes as Exhibit A 
                                thereto the Form of Rights Certificate.



                                   SIGNATURES

Pursuant  to the  requirements  of the  Securities  Exchange  Act of  1934,  the
registrant  has duly  caused  this  report  to be  signed  on its  behalf by the
undersigned, thereunto duly authorized.


                                            HSB GROUP, INC.

     
Dated: December 2, 1998                  /s/ R. Kevin Price
                                             R. Kevin Price
                                             Senior Vice President and
                                             Corporate Secretary







                                  EXHIBIT INDEX

     Exhibit No.    Description                          Page No.
     ----------     -----------                          --------
        4           Rights Agreement dated as of            5
                    November 28, 1998 between HSB
                    Group, Inc. and  BankBoston, N.A.,
                    which includes as Exhibit A thereto
                    the Form of Rights Certificate.