Southwest Securities, Inc. was a financial services company founded in 1972 and headquartered in Dallas, Texas. In January 20 ... 15, the firm was acquired by Hilltop Holdings Inc. (NYSE: HTH). Hilltop Holdings was also the parent of First Southwest Company, a Dallas-based broker-dealer established in 1946 and renowned for its nationwide public finance advisory business. With complementary business lines and a shared history representing more than 112 years of industry experience, Southwest Securities and FirstSouthwest were combined as HilltopSecurities in January 2016. Learn more about HilltopSecurities at HilltopSecurities.com. read more