By Loretta Fulton The leader of Hilltop Securities, Inc., and its subsidiaries will be the next speaker in the fall  Fletcher Lecture Series at Hardin-Simmons University. Brad Winges, president and Chief Executive Officer, will speak at 11:30 a.m. Sept. 29 in the Houston-Lantrip Center, located at 2241 Pine St. The lectures are free, but registration is required by Sept. 21.