4,000,000 Shares SOUTHWEST BANCORP, INC. Common Stock UNDERWRITING AGREEMENTUnderwriting Agreement • April 28th, 2010 • Southwest Bancorp Inc • National commercial banks • Missouri
Contract Type FiledApril 28th, 2010 Company Industry JurisdictionSTIFEL, NICOLAUS & COMPANY, INCORPORATED STEPHENS INC. as representatives of the several Underwriters named in Schedule I hereto c/o Stifel, Nicolaus & Company, Incorporated 501 North Broadway St. Louis, Missouri 63102