Maner Costerisan Recognized Among Top Accounting Firms in Great Lakes Region, Nationwide

As accounting firms across the country work to expand services and invest in new technology, Michigan-based Maner Costerisan continues to gain national recognition for its growth and innovation.  Accounting Today has once again provided dual recognition by naming Maner Costerisan among the top accounting firms in the Great Lakes region and a national “Top Firms to Watch” for 2026. 

Nationally, Maner Costerisan ranked No. 20 on Accounting Today’s “Top Firms to Watch” list, climbing nine spots in two years – from No. 23 in 2025 and No. 29 in 2024. The annual ranking highlights emerging firms that are demonstrating strong growth, innovation and strategic expansion within the accounting profession. 

Maner Costerisan also ranked No. 20 among firms in the Great Lakes region, which includes Michigan, Illinois, Indiana, Ohio and Wisconsin. The region represents one of the largest accounting markets in the country, including Chicago and other major financial centers. 

The recognition comes at a time when accounting firms nationwide are navigating talent shortages while expanding services and adopting new technologies to meet growing client demand.

“Breaking into the Top 20 among Great Lakes firms and Top Firms to Watch reflects the continued growth of our organization and the dedication of our team,” said Trey Williams, CPA, president of Maner Costerisan. “As the accounting industry evolves, we’re focused on investing in our people, expanding our services and adopting new technologies so we can continue helping clients adapt and succeed.”

Accounting Today is a national publication covering trends and developments across the accounting profession. Its annual Top 100 Firms and Regional Leaders report ranks firms based on revenue data and insights from firm leadership. 

The full Accounting Today Top 100 Firms and Regional Leaders report is available online. 

About Maner Costerisan 

Maner Costerisan is a full-service public accounting and business consulting firm founded in 1906 and based in Lansing, Michigan. With 120 years of experience and offices in Lansing and Grand Rapids, the firm provides a comprehensive range of services, including audit and assurance, tax planning and preparation, business consulting, technology solutions, and wealth management.

The firm is nationally recognized including being named a Best Firm to Work For, Best Firm for Young Accountants, Best of the Best Firms, and a Top Firm to Watch, among other accolades. Maner Costerisan is dedicated to helping clients achieve their financial goals through innovative solutions, personalized service, and a commitment to excellence. The firm serves a diverse clientele across various industries, including manufacturing, nonprofit, government, health care, construction, and education. For more information, contact us today.