Private Equity and the Reshaping of Professional Services

Private equity has moved from a peripheral presence in professional services to a structural force reshaping ownership, competition, and partner economics across accounting, advisory, consulting, disputes, restructuring, investigations, and expert services. Since 2021, PE firms have acquired majority or significant stakes in at least eleven of the top thirty US accounting firms. Deal volumes across the CPA profession alone rose from 22 transactions in 2023 to more than 100 in 2025.

For senior partners, the question is no longer whether to engage with the trend but how to position relative to it. This report documents, for the first time in a single publication, the verified ownership structure of the major PE-backed professional services firms across the US, UK and Europe. It explains the Alternative Practice Structure (APS) that makes the model legally workable, the Phase 2 challengers (WTS UK, Unity Advisory) that PE has built from zero, and the AI bifurcation that is restructuring the Big Four cost base in real time.

The report covers the macro forces shaping investment behaviour: the Strait of Hormuz disruption and Brent crude at USD 107 to USD 114 per barrel; ICC arbitration pending caseload at a record 1,869 cases; KPMG's April 2026 audit-partner cut citing AI; the EY Project Everest collapse and what it confirms about the structural inadequacy of the partnership model. It concludes with a structured framework for partners assessing how their firm's ownership trajectory compares to PE-backed, listed, founder-controlled, ESOP, and integrated-partnership alternatives.

Every claim is anchored to a primary or authoritative secondary source. No rumours, no unverified ownership percentages, no speculative valuations. Sources are grouped by firm in a referenced section. Research, not advice.