Grant Thornton Advisors plans to acquire CBIZ for $5 billion, which is expected to make it the fifth largest professional services, tax, and consulting firm in the United States.

Grant Thornton announced the acquisition of the U.S.-based professional services consulting firm CBIZ for $5 billion in cash. Under the agreement, CBIZ shareholders will receive $55 in cash per share. The transaction is expected to be completed in the fourth quarter of 2026. If successful, Grant Thornton is projected to become the fifth largest provider of professional, tax, and consulting services in the U.S., following the "Big Four" accounting firms.