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Private Equity, M&A, and the New Shape of Accounting

Reported by Williamblair ·Aon ·Sidley
Jun 23, 2026· 2 min read
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Key Takeaways
  • • Private equity capital has fundamentally reshaped the accounting industry, with more than half of the 30 largest US accounting firms now backed by PE investment, triggering widespread consolidation across the sector.
  • • 90% of accounting executives report involvement in acquisition decisions, with firms prioritizing acquisitions of consulting and advisory practices followed by tax services to build multiservice platforms and compete globally.
  • • Valuation multiples for accounting firms have risen significantly due to PE competition for high-quality assets, making it increasingly difficult for smaller, independent firms to compete and accelerating industry consolidation.
  • • Private equity has replaced traditional partner buyout models as the primary engine for scale and succession, enabling firms to integrate new technologies, secure top talent, and expand service offerings more rapidly than historically possible.
  • • M&A has emerged as the dominant growth strategy across the profession, with acquisition activity now widespread rather than exceptional, reflecting structural shifts in how accounting firms compete and scale in response to macroeconomic pressures.
Summary
The accounting profession is undergoing a fundamental transformation driven by private equity investment and accelerating M&A activity. According to William Blair equity research, a wave of consolidation has reshaped competition in a sector historically dominated by privately held partnerships. More than half of the 30 largest US accounting firms now have private equity backing, establishing PE as one of the most significant developments in the profession's history.

M&A has become the central growth strategy across the industry. William Blair's survey reveals that 90% of accounting executives are involved in acquisition decisions, with the vast majority of firms actively pursuing deals rather than viewing themselves as non-acquisitive. Accounting firms are strategically targeting consulting and advisory practices as primary acquisition targets, followed closely by tax services, reflecting a broader industry shift toward building integrated, multiservice platforms capable of competing at a global scale. This acquisition focus helps firms expand service offerings, enter new geographic markets, and manage macroeconomic pressures through organic growth acceleration.

Private equity's entry into accounting has fundamentally altered deal structures and valuations. Traditionally, CPA firms relied on partner buyout models to achieve scale and manage succession planning. PE capital has intensified competition for high-quality accounting assets, driving up valuation multiples and creating a more challenging environment for smaller, independent firms. This valuation dynamic has accelerated consolidation, as smaller firms struggle to compete with PE-backed acquirers that can deploy capital more aggressively and offer more attractive terms to sellers.

Larger, PE-backed firms leverage acquisitions to integrate new technologies, secure specialized talent, and build comprehensive service capabilities. The shift represents a departure from historical models where partnership structures and organic growth dominated the profession, moving toward institutionalized platforms capable of rapid scaling and service diversification.

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Sources

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AlphaMaven summarised this story from the reporting below. Each link opens the original article.

Williamblair Private Equity, M&A, and the New Shape of Accounting Aon Private Equity M&A Unlocked: Strategies for Thriving Amid Turbulence and Transformation Sidley Private Equity M&A Market Overview: Year-to-Date 2025 Recap