MERGERS & ACQUISITIONS

Thirteen Reasons Why Accounting Firms Merge

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Executive woman and man in business meeting

Check your motivation, then create your strategy.

By Marc Rosenberg
CPA Firm Mergers: Your Complete Guide

Why do firms merge?

Whether you’re looking to acquire a smaller firm, merge upward into a larger one or join forces with an equal, answering this basic question honestly and objectively is key to laying the groundwork for a successful merger.

MORE by Marc Rosenberg
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In the chart below, the main reasons that firms seek mergers are listed. Some of these objectives will benefit all parties across the board, while others provide the greatest advantage to one or the other of the merger partners based on their unique situation.
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CBIZ Told Grant Thornton No, No, No, Before Saying Yes

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But CBIZ Was Already Looking for a Way Out When Grant Thornton Called

A galaxy of firms involved in the CBIZ-GT deal.

The board rejected $47, $52 and $54.30 a share — and asked for $56 — before a June 8 “best and final” $55.

By CPA Trendlines Research
Special Report

CBIZ was looking for a way out of its predicament months before Grant Thornton called, and longer still before an activist investor wrote to tell the board what to do. In the end, CBIZ took $55 per share from Grant Thornton, but only after rejecting three lower offers from the firm.

MORE Special Report on the CBIZ-Grant Thornton Deal: 

  1. Fatal Attraction: How the Marcum Deal Set Up CBIZ for the Grant Thornton Takeover
  2. CBIZ Tells Grant Thornton No, No, No, Before Saying Yes
  3. Grant Thornton Flexes PE Muscle in CBIZ Deal
  4. CBIZ: Spanning 2 Rollup Eras in 2 Centuries
  5. $55 a Share: Who Won, Who Lost in CBIZ’s 29-Year Rollup
  6. CPA PE Deal Tracker™: The Consolidator Gets Consolidated

COMING NEXT: Was CBIZ CEO Jerry Grisko Worth It? MORE Private Equity

In March, with the stock at $27 and falling toward $25 — roughly 70% below its February 2025 peak — CBIZ’s board went to Goldman Sachs for a preliminary view of what the company was worth and what its strategic alternatives were, “if any.”

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Fatal Attraction: How the Marcum Deal Set Up CBIZ for the Grant Thornton Takeover

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CBIZ Grows 52%. Then Growth Stalls, Stock Falls, GT Moves In. 

CEOs Peko, Grisko, Bunn

 

By CPA Trendlines Research
Special Report

Marcum made CBIZ bigger almost overnight. It also quadrupled the debt, more than tripled interest expense, and left executives figuring their best option was Grant Thornton’s $5-billion buyout offer.

MORE Special Report on the CBIZ-Grant Thornton Deal: 

  1. Fatal Attraction: How the Marcum Deal Set Up CBIZ for the Grant Thornton Takeover
  2. CBIZ Tells Grant Thornton No, No, No, Before Saying Yes
  3. Grant Thornton Flexes PE Muscle in CBIZ Deal
  4. CBIZ: Spanning 2 Rollup Eras in 2 Centuries
  5. $55 a Share: Who Won, Who Lost in CBIZ’s 29-Year Rollup
  6. CPA PE Deal Tracker™: The Consolidator Gets Consolidated

COMING NEXT: Was CBIZ CEO Jerry Grisko Worth It? MORE Private Equity

CBIZ entered 2026 looking like one of accounting’s great consolidators. Revenue had risen 52.1% in 2025 to $2.758 billion, and net income had increased 181.3% to $115.4 million.

And yet, by July 28, the company is ready to take $55 per share, better than the $46.70 the day before, but less than the $88.65 peak last year.

Ryan Bunn, the activist shareholder at Reference Equity, which had been pressing the company since mid-June to raise equity and keep buying firms, says the decision “feels like capitulation.”

The arithmetic underneath the growth may help explain why.

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$55 a Share: Who Won, Who Lost in CBIZ’s 29-Year Rollup

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For Marcum partners, it’s complicated.

At $55, GT is offering the best price all year, not as good as last year.

By CPA Trendlines Research
Special Report

Grant Thornton’s cash offer creates four very different CBIZ histories: a modest return for some long-term holders, a nearly 4,800% gain for investors who bought after the 2000 collapse, a 38% loss from the 2025 peak and no single answer for former Marcum partners.

MORE Special Report on the CBIZ-Grant Thornton Deal: 

  1. Fatal Attraction: How the Marcum Deal Set Up CBIZ for the Grant Thornton Takeover
  2. CBIZ Tells Grant Thornton No, No, No, Before Saying Yes
  3. Grant Thornton Flexes PE Muscle in CBIZ Deal
  4. CBIZ: Spanning 2 Rollup Eras in 2 Centuries
  5. $55 a Share: Who Won, Who Lost in CBIZ’s 29-Year Rollup
  6. CPA PE Deal Tracker™: The Consolidator Gets Consolidated

COMING NEXT: Was CBIZ CEO Jerry Grisko Worth It? MORE Private Equity

Same deal. Same $55 a share, cash, on the table for every CBIZ shareholder. Four completely different outcomes, depending on when you bought in.

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CBIZ: Spanning 2 Rollup Eras in 2 Centuries

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CBIZ, once known as Century Business Services,  started with a “rapacious appetite” for acquisitions. Now it’s the appetizer.

By CPA Trendlines Research
Special Report

The company that helped pioneer Wall Street-backed accounting consolidation in the 1990s is set to be absorbed by today’s private-capital version of the same idea.

MORE Special Report on the CBIZ-Grant Thornton Deal: 

  1. Fatal Attraction: How the Marcum Deal Set Up CBIZ for the Grant Thornton Takeover
  2. CBIZ Tells Grant Thornton No, No, No, Before Saying Yes
  3. Grant Thornton Flexes PE Muscle in CBIZ Deal
  4. CBIZ: Spanning 2 Rollup Eras in 2 Centuries
  5. $55 a Share: Who Won, Who Lost in CBIZ’s 29-Year Rollup
  6. CPA PE Deal Tracker™: The Consolidator Gets Consolidated

COMING NEXT: Was CBIZ CEO Jerry Grisko Worth It? MORE Private Equity

Twenty-seven years ago, a rollup called Century Business Services was buying accounting firms with what its own mergers chief called a “rapacious appetite.” Today it goes by a different name — CBIZ. And on July 28, it agreed to be bought.
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