EX-99.B 4 h04751aexv99wb.txt JOINT FILING AGREEMENT Exhibit B --------- JOINT FILING AGREEMENT The undersigned hereby agree that the statement on Schedule 13G filed herewith and any amendments thereto, relating to the common stock, $0.10 par value, of Argonaut Group, Inc., is, or will be, filed jointly with the Securities and Exchange Commission pursuant to Rule 13d-1(k)(1) under the Securities Exchange Act of 1934, as amended, on behalf of each such person. IN WITNESS WHEREOF, the undersigned have executed this Joint Filing Agreement. Dated: April 7, 2003 HCC Insurance Holdings, Inc. By: /s/ CHRISTOPHER L. MARTIN ---------------------------------- Name: Christopher L. Martin Title: Executive Vice President Houston Casualty Company By: /s/ CHRISTOPHER L. MARTIN ---------------------------------- Name: Christopher L. Martin Title: Executive Vice President U.S. Specialty Insurance Company By: /s/ CHRISTOPHER L. MARTIN ---------------------------------- Name: Christopher L. Martin Title: Executive Vice President HCC Life Insurance Company By: /s/ CHRISTOPHER L. MARTIN ---------------------------------- Name: Christopher L. Martin Title: Executive Vice President Avemco Insurance Company By: /s/ CHRISTOPHER L. MARTIN ---------------------------------- Name: Christopher L. Martin Title: Executive Vice President 9