EXHIBIT 99.1
 
                            BERKSHIRE HATHAWAY INC.
 
                            PROXY FOR COMMON STOCK
                      SOLICITED BY THE BOARD OF DIRECTORS
                    FOR THE SPECIAL MEETING OF STOCKHOLDERS
                              SEPTEMBER 16, 1998
 
  The undersigned stockholder of Berkshire Hathaway Inc. ("Berkshire") hereby
appoints Warren E. Buffett, Charles T. Munger, and Marc D. Hamburg as
attorneys, agents, and proxies of the undersigned, with full power of
substitution in each of them, to vote, in the name and on behalf of the
undersigned at the Special Meeting of Stockholders (the "Special Meeting") of
Berkshire to be held on September 16, 1998 at 9:30 a.m., at the Orpheum
Theater, 409 South 16th Street, Omaha, Nebraska, and at all adjournments
thereof, all of the shares of Class A Common Stock and Class B Common Stock of
Berkshire which the undersigned would be entitled to vote if personally
present, with all powers the undersigned would possess if personally present.
 
  PROPOSAL: To approve and adopt the Agreement and Plan of Mergers dated June
19, 1998 (the "Merger Agreement") by and between Berkshire and General Re
Corporation, a Delaware corporation ("General Re"), and to approve the
transactions contemplated thereby, including either the merger of Berkshire
with Wyllis Merger Sub Inc., a Delaware corporation ("Merger Sub A"), pursuant
to a Plan of Merger between Berkshire, NBH, Inc., a Delaware corporation, and
Merger Sub A, or the Alternative Transaction (as defined in the Proxy
Statement) involving the merger of General Re with a subsidiary of Berkshire
pursuant to a Plan of Merger between General Re, Berkshire and such
subsidiary.
 
    [_] FOR                  [_] AGAINST                  [_] ABSTAIN
 
  PROPOSAL: To approve an amendment to the Restated Certificate of
Incorporation of Berkshire to increase the number of shares of Berkshire Class
A Common Stock authorized for issuance from 1,500,000 to 1,650,000, and to
increase the number of shares of Berkshire Class B Common Stock authorized for
issuance from 50,000,000 to 55,000,000. This amendment will be effective if
the Alternative Transaction occurs.
 
    [_] FOR                  [_] AGAINST                  [_] ABSTAIN
 
  The undersigned hereby acknowledged receipt of the Notice of Special Meeting
and the Joint Proxy Statement/Prospectus (the "Proxy Statement") dated August
13, 1998 relating to the Special Meeting.
 
  ALL SHARES WILL BE VOTED AS SPECIFIED. IF THE PROXY IS SIGNED AND SENT BUT
NO CHOICE IS SPECIFIED, THE SHARES WILL BE VOTED FOR APPROVAL AND ADOPTION OF
THE MERGER AGREEMENT AND FOR APPROVAL OF THE AMENDMENT TO THE CERTIFICATE OF
INCORPORATION. SHARES WILL BE VOTED AT THE DISCRETION OF THE PROXY HOLDERS AS
TO ANY OTHER MATTER THAT MAY PROPERLY COME BEFORE THE MEETING FOR WHICH
DISCRETIONARY AUTHORITY MAY BE GRANTED. PROXIES NOT RECEIVED OR VOTES TO
ABSTAIN WILL BE TREATED AS VOTES AGAINST THE PROPOSALS.

 
  Any of said proxies or their substitutes who shall be present and act, or if
only one shall attend, then that one, shall have and may exercise all the
powers of said proxies hereunder.
 
                                          _________________________  __________
                                                 (SIGNATURE)           (DATE)
 
                                          _________________________  __________
                                                 (SIGNATURE)           (DATE)
 
                                          Please sign exactly as your name(s)
                                          appear(s) hereon. All holders must
                                          sign. When signing in a fiduciary
                                          capacity, please indicate full title
                                          as such. If a corporation or a
                                          partnership, please sign in full
                                          corporate or partnership name by
                                          authorized person.
 
                PLEASE EXECUTE AND RETURN THIS PROXY PROMPTLY.
                     YOUR COOPERATION WILL BE APPRECIATED.