Description Holder Properties can hold the fort and build it too. The company is a commercial real estate developer that builds and leases office and industrial space and offers property management services. Holder Properties has developed facilities for such companies as T-Mobile, Northrop Grumman, and Turner Broadcasting; it also builds speculative projects (properties built before tenants or buyers are lined up). The company's portfolio is located primarily in Georgia and other southeastern states, but it has expanded to midwestern, northwestern, and northeastern states in recent years. It manages more than 8 million sq. ft. of office and industrial space. Holder Properties was founded in 1980.