Ostrow Reisin Berk & Abrams, Ltd. (ORBA) is a full-service accounting, tax, and advisory firm based in Chicago. They offer services including accounting, assurance, business advisory, financial and estate planning, fraud investigation, tax, litigation support, and mergers and acquisitions[1][2]. Their target audience includes privately-held companies, individuals, and not-for-profit organizations[1][5]. ORBA's unique selling proposition is its focus on building long-standing relationships with clients through direct involvement and a team-oriented environment, fostering a culture of diversity, equity, and inclusion[1][3]. This approach allows for personalized and innovative solutions tailored to each client's needs[1][3].