Grant Thornton, a major accounting and advisory firm, has agreed to buy CBIZ, Inc. for $5 billion in cash, according to an announcement made from Chicago, Cleveland, and New York on July 29, 2026.

The deal brings together two companies in the professional services world. Grant Thornton focuses on auditing (checking companies' financial records), tax, and advisory work for mid-size and large businesses. CBIZ, which trades on the New York Stock Exchange under the ticker CBZ, offers accounting, tax help, benefits and insurance services, and healthcare consulting.

The $5 billion figure, reported by Investing.com on July 29, is higher than an earlier Wall Street Journal report that put the value at $3 billion. A two-billion-dollar difference is a big deal. It could mean the terms changed, that the final number includes debts the buyer is taking on, or that the valuation was simply updated. The Investing.com figure is the one to work with for now, pending further regulatory filings.

The announcement came from three cities at once: Chicago, where Grant Thornton has its U.S. headquarters; Cleveland, where CBIZ is based; and New York, likely where the deal's advising and financing were arranged. A simultaneous announcement from multiple cities is typical when the companies involved are based in different places.

The deal is all cash, meaning CBIZ shareholders will receive money rather than shares in the new combined company. Cash deals give selling shareholders immediate, guaranteed value. They also usually mean the buyer either has enough money on hand or has lined up financing. The trade-off for CBIZ shareholders is that they will not benefit if the combined company does well afterward — and the cash premium (the extra amount paid above the stock's normal price) is meant to make up for that.

The broader context here is about competition. The accounting industry has been consolidating — larger firms buying smaller ones — as they face rising labor costs, the need to invest in technology, and pressure from the Big Four (Deloitte, PwC, EY, and KPMG), which dominate the largest client engagements. Combining Grant Thornton and CBIZ would create a bigger firm better positioned to compete for clients that are too large for small regional firms but not quite in Big Four territory.

CBIZ also brings something Grant Thornton lacks on its own: revenue from insurance and benefits administration, which tends to be steadier and more profitable than pure auditing work. Whether the combination actually delivers the expected benefits depends on how well the two firms integrate, whether their cultures align, and whether they can hold onto key clients and staff.

For CBIZ investors, this is a chance to sell shares for cash. The exact price per share, any penalties if the deal falls apart, and the expected timeline will be revealed in upcoming filings with the Securities and Exchange Commission. Regulators will review the deal for antitrust concerns, which in this industry usually means checking whether the two firms share too many of the same clients in the same regions.

No closing date, price per share, financing details, or regulatory approval pathway has been specified yet. More information will likely come in formal filings and communications from Grant Thornton to its partners. For now, the $5 billion price tag and the all-cash structure are what is confirmed.

If the deal goes through, it would change the competitive order among accounting firms just below the Big Four. Rivals like BDO, RSM, and Crowe may feel pressure to make their own acquisitions or find ways to stand out.