AMENDMENT TO STOCK PURCHASE AGREEMENT This Amendment to Stock Purchase Agreement is made on October 7, 1993 by and among ALLEGHANY CORPORATION, a Delaware corporation, THE CONTINENTAL CORPORATION, a New York corporation, GOLDMAN, SACHS & CO. and certain funds which Goldman, Sachs & Co. either control or of which they are general partner, UNDERWRITERS RE HOLDINGS CORP., a Delaware corporation, and UNDERWRITERS RE CORPORATION, a Delaware corporation. All capitalized terms used but not defined herein shall have the meaning ascribed to such terms in the Stock Purchase Agreement, as defined below. W I T N E S S E T H : WHEREAS, the parties hereto have entered into a Stock Purchase Agreement (the "Stock Purchase Agreement") dated as of July 28, 1993; and WHEREAS, the parties hereto desire to amend the Stock Purchase Agreement to accurately reflect the number of shares of Common Stock of NHC to be issued and outstanding as of the Closing Date; NOW, THEREFORE, in consideration of the premises and the mutual covenants, agreements and provisions contained herein, the parties hereto agree as follows: 1. Amendment. It is understood and agreed that all references in the Stock Purchase Agreement to the number "9,282,130" as it relates to the number of shares of Common Stock of NHC to be issued and outstanding as of the Closing Date be and hereby are amended to be "9,282,129". It is further understood and agreed that any breach or default that would have occurred absent this Amendment to Stock Purchase Agreement be and hereby is waived. 2. Effectiveness. This Amendment to Stock Purchase Agreement shall be deemed to be effective, upon execution of the parties below, as of July 28, 1993. 3. Governing Law. This Amendment to Stock Purchase Agreement shall be governed by and construed in accordance with the laws and in the manner contemplated by the Stock Purchase Agreement. IN WITNESS WHEREOF, each party hereto has caused this Amendment to Stock Purchase Agreement to be duly executed on the date first above written. ALLEGHANY CORPORATION By: /s/David B. Cuming Title: Senior Vice President THE CONTINENTAL CORPORATION By: /s/Wayne H. Fisher Title: Executive Vice President STONE STREET FUND 1986 BY: Stone Street Advisors Corp., General Partner By: /s/Carla Skodinski Title: Vice President STONE STREET FUND 1987 BY: Stone Street Capital Corp., General Partner By: /s/Carla Skodinski Title: Vice President BROAD STREET INVESTMENT FUND I, L.P. BY: Goldman, Sachs & Co., General Partner By: /s/Richard A. Friedmen Title: Partner BRIDGE STREET FUND 1986 BY: Stone Street Advisors Corp., Managing General Partner By: /s/Carla Skodinski Title: Vice President BRIDGE STREET FUND 1987 BY: Stone Street Capital Corp., Managing General Partner By: /s/Carla Skodinski Title: Vice President GOLDMAN, SACHS & CO. By: Richard A. Friedman Title: General Partner UNDERWRITERS RE HOLDINGS CORP. By: /s/Peter A. Bengelsdorf Title: Chief Financial Officer UNDERWRITERS RE CORPORATION By: /s/Peter A. Bengelsdorf Title: Chief Financial Officer