EX-99.9 5 y53177ex99-9.txt JOINT FILING AGREEMENT 1 CUSIP NO. 855546107 EXHIBIT 9 EXHIBIT 9 JOINT FILING AGREEMENT The undersigned reporting persons hereby agree that the statements filed pursuant to this Schedule 13D, to which this Agreement is filed as an exhibit, are filed on behalf of each of them. Date: September 10, 2001 J.P. MORGAN PARTNERS (SBIC), LLC By: /s/ Jeffery C. Walker ----------------------------------------- Name: Jeffery C. Walker Title: President Date: September 10, 2001 J.P. MORGAN PARTNERS (BHCA), L.P. By: JPMP MASTER FUND MANAGER, L.P., ITS GENERAL PARTNER By: JPMP CAPITAL CORP., ITS GENERAL PARTNER By: /s/ Jeffery C. Walker ----------------------------------------- Name: Jeffery C. Walker Title: President Date: September 10, 2001 QUETZAL/J.P. MORGAN PARTNERS, L.P. By: Quetzal/J.P. Morgan Partners (GP), LLC, it General Partner By: /s/ Lauren M. Tyler ----------------------------------------- Name: Lauren M. Tyler Title: Managing Member