D.D. Pyle Company. For more than 50 years, D.D. Pyle Company has served as a trusted business partner to clients throughout the state of Iowa and surrounding states. Established in 1956 by Robert D. Pyle, we've been providing services to individuals and to businesses of all sizes. Over the years, we've grown to a firm consisting of 3 partners and 20 accounting professionals and support staff. Your success is our success, and all of us at D.D. Pyle Company look forward to meeting your accounting and business needs.