Southern Insurance Underwriters (SIU) was established in 1964 as a Georgia corporation. Since that time SIU has grown to beco ... me one of the largest family owned MGAs in the country. SIU has a broad range of property, casualty, and transportation products and specializes in hard to place, specialty and excess & surplus lines risks. With an experienced staff of seasoned underwriters, the scope of risks that can be underwritten ranges from the most simple property risks to highly sophisticated self-insured programs. SIU is active in the American Association of Managing General Agents (AAMGA), National Association of Professional Surplus Lines Offices (NAPSLO), the Independent Insurance Agents of Georgia, Alabama, Florida, and South Carolina and the Professional Insurance Agents (PIA) of Georgia, Alabama, Florida and South Carolina. read more