Listed by Crain's as one of Chicago's top accounting firms, Ostrow Reisin Berk & Abrams, Ltd. (ORBA) is a progressive certified public accounting and business consulting firm dedicated to providing flexible, high quality, and value-added service that meets each client’s individual needs. Located in downtown Chicago, ORBA has all of the tools, resources and expertise of a large accounting firm but is also small enough to focus on personalized service and satisfying the needs of our clients.