Welcome to Wealth Management For over 100 years, Security National Bank has helped individuals, families, organizations, and businesses formulate and reach their financial goals. Security National Bank is a market leader in Trust services, Investments and 401(k) retirement plans in the Siouxland area, and offers a full range of financial services, from brokerage accounts and IRAs, to managed investments and estate planning. Our professional staff of 20 has over 300 years of combined experience to serve you. We offer a full range of services to meet your needs, and the personalized attention you deserve.