Mega-mergers, PE power, and the AI imperative: What July’s market moves mean for accounting 

July 2026 has delivered one of the most transformative headlines the professional services sector has seen in a generation. As private equity capital continues to reshape accountancy, firms ranging from mid-market regional practices to global giants are accelerating consolidation and technology deployment to secure competitive dominance.  

Here is my take on the three major trends defining the profession in July 2026: 

 1. The $5bn PE-Backed Megadeal: Reshaping the Top Tier 

The standout news this month is the landmark $5bn (£3.7bn) all-cash acquisition of CBIZ by Grant Thornton Advisors. Described as the largest transaction of its kind in over 25 years, this merger will create the US’s fifth-largest tax, advisory, and professional services firm. 

CBIZ shareholders are to receive $55 (£41) per share (a 54% premium!) resulting in CBIZ (the only publicly traded accounting firm) being delisted from the New York Stock Exchange. 

The merger unites two industry heavyweights: Grant Thornton (currently ranked No. 9 by revenue) and CBIZ (No. 8). Backed by New Mountain Capital, the combined US platform will generate over $5bn in annual domestic revenue. Globally, the firm will operate across 20+ countries, with nearly $7.5bn in total revenue and a 34,500-strong workforce. CBIZ’s benefits and insurance arm will become a separate, New Mountain Capital-backed entity. 

Grant Thornton Advisors CEO Jim Peko emphasised the strategic vision: “By combining our multinational platform with CBIZ’s strong market presence, we’re broadening our ability to support businesses through every stage of growth.” CBIZ president and CEO Jerry Grisko added: “Joining Grant Thornton Advisors accelerates the realisation of that vision, creating a stronger firm with new opportunities for our team and enhanced service offerings for clients.” 

 2. Acquisition Volume Breakdown: UK vs. International Context 

July saw rapid mid-market consolidation, with over 20 UK acquisitions. Notable activity included multiple deals from Gerald Edelman and Streets, alongside strategic expansions like Grant Thornton UK’s acquisition of Fairgrove — reflecting a relentless drive for scale. 

Internationally, while the $5bn GT–CBIZ merger dominated the headlines, the underlying trend is equally aggressive, with over 25 additional acquisitions reported globally. This reflects a shift toward global platform expansion, where firms are integrating multidisciplinary services across borders rather than simply buying revenue. 

As Bob Lewis of The Visionary Group notes, this capital deployment is no passing phase. Institutional investment is fundamentally restructuring the profession, with private equity targeting mid-market players while specialty investors consolidate smaller, sub-$10 million practices. 

 3. AI Investment and Capability Building 

M&A capital is now powering essential technological upgrades. The GT–CBIZ deal leverages a £748m investment to deploy AI at scale, but the wider market focus has shifted from procurement to governance and integration. With nearly half of UK finance professionals spending over 15 hours weekly verifying AI outputs – a ‘Verification Tax’ – firms are prioritising ‘glass-box’ systems that ensure transparency over opaque, black-box alternatives. 

For mid-tier practices, the shift is towards institutionalised AI. Firms like HB&O have established dedicated steering groups, while Gravita is formalising pilot programmes to train staff as ‘interpreters’ of AI insights. Ultimately, competitive advantage now depends on blending machine efficiency with human judgment, ensuring AI becomes a tool for, not a replacement of, high-value strategic counsel. 

The Bottom Line 

This flurry of deal activity highlights an unmistakable trajectory: firm scale and advanced technology are no longer optional extras, but fundamental prerequisites for long-term competitiveness. As private equity capital fuels consolidation from top-tier behemoths down to regional practices, every accounting firm must evaluate its long-term strategy. 

Where does your practice stand in this rapidly shifting market – will you scale up through strategic M&A, establish dedicated AI adoption frameworks, or double down on niche advisory services to defend your client base? 

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