National Security Group, Inc. Common Stock, also called National Security Group, is a holding company, which engages in the provision of insurance products. Read More It operates through two segments: Property & Casualty (P&C) Insurance, and Life Insurance. The P&C Insurance segment, through the National Security Fire and Casualty, and Omega One Insurance Company, primarily writes personal lines dwelling coverage including dwelling fire and windstorm, homeowners, and mobile home owners lines of insurance. The Life Insurance segment, through the National Security Insurance Company, offers a basic line of life and health and accident insurance products. The National Security Group was founded in 1947 and is headquartered in Elba, AL. The listed name for NSEC is National Security Group, Inc. Common Stock.