CBIZ Inc., a leading national professional services advisor, today announced it has completed the acquisition of the non-attest business of Marcum LLP, with expected combined annualized revenue of approximately $2.8 billion. The transaction makes CBIZ the largest full-service professional services advisor of its kind in the U.S. providing accounting, tax, advisory, benefits, insurance, and technology services, primarily to middle-market businesses.

Concurrent with the closing of this transaction, the attest business of Marcum was acquired by CBIZ CPAs, a national independent CPA firm with which CBIZ has had an Administrative Service Agreement for over 25 years.

The cash-and-stock transaction is valued at approximately $2.3 billion. More information about this transaction can be found at cbiz.com/stronger-together.