Key Takeaways
- • Grant Thornton Advisors is acquiring CBIZ in an all-cash transaction valued at $5 billion, with CBIZ shareholders receiving $55.00 per share, marking a significant consolidation in the accounting and advisory services sector.
- • Following this deal, Andersen Tax will be the only publicly traded CPA firm remaining; industry expert Allan Koltin predicts 8 to 10 additional publicly traded CPA firms will be acquired by private equity within three to five years.
- • More than 40 private equity platforms now own accounting firms, split roughly evenly between "motherships" (operating CPA firms with $300 million to $1+ billion in revenues) and pure roll-ups that acquire smaller firms while preserving their names and cultures.
- • The acquisition signals a structural shift in accounting firm ownership models, driven by divergence between public and private market valuations rather than evidence that public ownership is inherently flawed.
- • Grant Thornton's combined platform will achieve over $5 billion in annual domestic revenue, positioning it as a top-five provider in tax and advisory services.
Summary
Grant Thornton Advisors' $5 billion all-cash acquisition of CBIZ represents a watershed moment in professional services consolidation. The deal, which will be finalized by year-end 2026 with CBIZ shareholders receiving $55.00 per share, removes one of the nation's largest publicly traded CPA and financial services providers from public markets. CBIZ operates as a nationwide provider of financial, insurance, and advisory services, and the transaction positions the combined entity as a top-five tax and advisory services firm with over $5 billion in annual domestic revenue.
The transaction has sparked renewed debate about whether public ownership remains viable for mid-market accounting firms. However, industry analyst Allan Koltin, President of Koltin Consulting Group, challenges this framing. Rather than signaling the failure of public ownership, Koltin attributes the deal to "unique circumstances" and market valuation divergence—the public markets pricing CBIZ differently than private equity acquirers. Koltin emphasizes that public ownership itself is not the underlying problem, noting that the Big Four accounting firms remain too large for private equity to absorb as traditional leveraged buyouts.
The broader market context reveals substantial private equity penetration of the accounting sector. Approximately 40 PE platforms now own accounting firms, organized into two distinct structures: roughly half are "motherships"—functioning CPA firms that accepted outside capital with revenues ranging from under $300 million to over $1 billion—while the other half operate as pure roll-ups, acquiring smaller practices while preserving their independent brand identities and cultures. These roll-ups typically build toward eventual exit through subsequent PE acquisitions, family offices, sovereign wealth funds, or strategic buyers.
Koltin forecasts significant continued consolidation, predicting that 8 to 10 publicly traded CPA firms will complete private equity acquisitions within three to five years. Following CBIZ's delisting, Andersen Tax will stand alone as the sole publicly traded CPA firm among the mid-market players. Notably, Koltin suggests the possibility that all Big Four firms could eventually pursue public ownership, inverting the current narrative around private equity dominance. The Grant Thornton-CBIZ transaction should thus be understood not as definitive proof of public equity's obsolescence in accounting services, but as evidence of structural market shifts in how professional service firms are financed and consolidated.
The transaction has sparked renewed debate about whether public ownership remains viable for mid-market accounting firms. However, industry analyst Allan Koltin, President of Koltin Consulting Group, challenges this framing. Rather than signaling the failure of public ownership, Koltin attributes the deal to "unique circumstances" and market valuation divergence—the public markets pricing CBIZ differently than private equity acquirers. Koltin emphasizes that public ownership itself is not the underlying problem, noting that the Big Four accounting firms remain too large for private equity to absorb as traditional leveraged buyouts.
The broader market context reveals substantial private equity penetration of the accounting sector. Approximately 40 PE platforms now own accounting firms, organized into two distinct structures: roughly half are "motherships"—functioning CPA firms that accepted outside capital with revenues ranging from under $300 million to over $1 billion—while the other half operate as pure roll-ups, acquiring smaller practices while preserving their independent brand identities and cultures. These roll-ups typically build toward eventual exit through subsequent PE acquisitions, family offices, sovereign wealth funds, or strategic buyers.
Koltin forecasts significant continued consolidation, predicting that 8 to 10 publicly traded CPA firms will complete private equity acquisitions within three to five years. Following CBIZ's delisting, Andersen Tax will stand alone as the sole publicly traded CPA firm among the mid-market players. Notably, Koltin suggests the possibility that all Big Four firms could eventually pursue public ownership, inverting the current narrative around private equity dominance. The Grant Thornton-CBIZ transaction should thus be understood not as definitive proof of public equity's obsolescence in accounting services, but as evidence of structural market shifts in how professional service firms are financed and consolidated.
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