GOLUB CAPITAL BDC, INC. 6,000,000 Shares of Common Stock UNDERWRITING AGREEMENT Dated: May 7, 2013Underwriting Agreement • May 8th, 2013 • Golub Capital BDC, Inc. • New York
Wells Fargo Securities, LLC Morgan Stanley & Co. LLC UBS Securities LLC, as representatives of the underwriters named in Exhibit A c/o Wells Fargo Securities, LLC 375 Park Avenue 4th Floor New York, New York 10152
