May 2026 Recap: Accounting Industry Firm Updates in 10 Mins

May 2026 was a busy month for accounting firms, with growth showing up across acquisitions, service innovation, and leadership moves. Firms expanded into new regions, strengthened niche advisory capabilities, and placed bigger bets on AI, sustainability, audit technology, and cross-border client support. The updates also show a profession moving beyond traditional compliance work and leaning into specialized, scalable, tech-enabled services. From Latin America expansion to AI operating systems and new practice leaders, these developments reflect how firms are preparing for stronger competition, more complex client needs, and a faster-moving advisory market.

M&A Updates

Plante Moran Expands Internationally with JA Del Río Merger

Plante Moran’s JA Del Río merger shows how global expansion is becoming a serious growth lever for major accounting firms. Effective July 1, the deal adds around 500 professionals across Mexico, Colombia, and Costa Rica, giving Plante Moran its largest international push yet. The move strengthens its Latin America presence while supporting a wider strategy across global markets. But the real story is what this cross-border play signals for mid-market advisory competition.

HBK Expands Florida Presence with BB&K Acquisition

HBK’s acquisition of Tampa-based BB&K adds 22 professionals and gives the Ohio-based firm a stronger foothold in Florida, one of its targeted growth markets. Effective May 1, the deal reflects HBK’s steady expansion strategy while keeping local client relationships at the center. The move is less about simply adding another office and more about strengthening service reach in a fast-growing regional market. What comes next could shape HBK’s Florida ambitions even further.

Aprio Expands with Acquisition of Price Kong

Aprio’s planned acquisition of Phoenix-based Price Kong, effective June 1, strengthens its Arizona presence and opens the door to the cannabis industry. The deal adds accounting and audit expertise while giving Aprio a foothold in a sector with complex compliance, tax, and advisory needs. It is a smart regional play, but also a bet on specialized industries becoming bigger growth engines for firms. The broader implications for Aprio’s expansion strategy are worth watching.

Springline Advisory Expands with GBC Acquisition

Springline Advisory’s acquisition of GBC Advisory marks another deliberate step in its platform expansion, this time into the Oklahoma City market. The deal brings in GBC’s strengths in business valuation, litigation support, and financial services for high-net-worth and divorce-related matters. For a Dallas-based firm building scale, this is not just a geographic add-on. It deepens advisory capabilities in niche, relationship-driven services where expertise often matters more than size.

Ascend Expands with William Vaughan Company Acquisition

Ascend’s acquisition of William Vaughan Company gives the Alpine Investors-backed platform a stronger Midwest presence through one of Northwest Ohio’s largest locally owned firms. Founded in 1959, William Vaughan brings more than 115 professionals, 15 partners, and services across tax, audit, client accounting, and transaction advisory. The deal keeps independence and technology investment front and center, while shifting into an alternative practice structure. That mix says plenty about where PE-backed accounting growth is headed.

Doeren Mayhew Expands with Parlade Schaefer Schortz Acquisition

Doeren Mayhew’s acquisition of South Miami-based Parlade Schaefer Schortz CPAs adds 25 professionals and extends the firm’s Florida presence. The deal pushes Doeren Mayhew past 1,300 team members nationwide and nearly 1,500 globally, with Jaime Parlade and Justin Schaefer continuing as principals. This looks like a targeted move to add local depth without disrupting client continuity. The bigger question is how aggressively Doeren Mayhew keeps building in high-value regional markets.

People Updates

EisnerAmper Welcomes Gregory Chin as TAS Partner

EisnerAmper’s addition of Gregory Chin brings serious transaction advisory muscle to the firm, especially in the cannabis and hemp space. Chin joins as a partner in Transaction Advisory Services and partner-in-charge of the Cannabis and Hemp Group, bringing 30 years of experience across buy-side and sell-side due diligence, M&A, and strategic transactions. For a firm building deeper advisory strength in complex emerging sectors, this move looks carefully timed. The next question is how far that cannabis advisory push can go.

Josh Swain Appointed Leader of TMT, Life Sciences & Services at Forvis Mazars

Forvis Mazars naming Josh Swain as national sector leader for its TMT, Life Sciences, and Services practice signals a sharper focus on high-growth, tech-driven industries. Effective June 1, Swain succeeds Billy Parker, who will transition after a 40-year career and seven years leading the practice nationally. With more than 16 years as a tax partner, Swain is expected to drive collaboration, growth strategy, and client support as AI reshapes these sectors.

RKL Appoints New Leader for Senior Living Services

RKL’s leadership transition in its Senior Living Services Consulting Group comes as senior care providers face mounting operational, reimbursement, and regulatory pressure. Stephanie Kessler, a nurse, healthcare educator, and longtime RKL consultant, takes over effective May 1, succeeding Jeffrey Boland. Boland will remain involved in client engagement until his planned retirement in 2027. The move gives RKL both continuity and fresh clinical perspective, which could matter as senior living advisory work becomes more complex.

REDW Advisors & CPAs Appoints Jonathan Roepcke as Principal

REDW Advisors & CPAs has named Jonathan Roepcke principal in its Client Advisory and Accounting Services practice, strengthening its accounting advisory bench in Albuquerque. Roepcke brings deep experience in public accounting, governmental accounting, GASB implementation, financial reporting, and support for Tribal governments. His role will focus on strategic accounting advisory, financial reporting oversight, and operational support for clients facing complex compliance needs. The broader story is how REDW is scaling specialized advisory work across niche client groups.

CohnReznick Welcomes Simon Dufour as Assurance Partner

CohnReznick’s appointment of Simon Dufour as assurance partner strengthens its consumer and industrial practice, especially in Southern California’s apparel sector. Dufour brings 25 years of audit and assurance experience across apparel, cannabis, food and beverage, manufacturing, distribution, and restaurants. His background also includes compliance audits, financial audits, operational oversight, and technical accounting research for public and private companies. The move points to CohnReznick’s push to deepen industry specialization in competitive regional markets.

Service Updates

KPMG Forms Strategic Alliance with Anthropic for AI Integration

KPMG’s alliance with Anthropic puts AI directly inside its global client delivery platform, moving the firm beyond scattered tech tools and into a more integrated delivery model. By embedding Claude into its Digital Gateway platform, KPMG aims to speed up tax and legal workflows, build AI agents faster, and give all 270,000 professionals access to advanced AI capabilities. The real question is how quickly this shifts everyday client service from a manual process to an AI-supported execution.

CohnReznick Unveils Public Finance and Sustainability Practice

CohnReznick’s new Public Finance and Sustainability Practice shows how accounting firms are blending advisory, capital strategy, and social impact work under one roof. Led by Ted Kowalsky, the practice is designed to support public sector, nonprofit, and sustainability-focused clients with financing and advisory solutions. It builds on CohnReznick’s existing public finance and community investment capabilities. The move raises a bigger question: are sustainability and public finance becoming core growth lanes for advisory firms?

Forvis Mazars Expands International Desks to China and Japan

Forvis Mazars is expanding its international desk model with new China and Japan desks aimed at helping U.S. multinational enterprises manage cross-border complexity. The desks give clients dedicated points of contact, stronger coordination across countries, and access to professionals familiar with local language, culture, and regulations. After launching German and French desks earlier, this move signals a more structured global service strategy. The bigger story is how firms are turning international support into a competitive advantage.

HubSync Unveils AI Operating System for CPA Firms

HubSync’s launch of HubSync Halo puts agentic AI squarely into the CPA firm workflow conversation. The platform uses specialized AI agents to automate engagement management, document gathering, tax preparation, delivery, and advisory processes. CEO John McGowan framed it as a way to free CPAs from repetitive follow-ups, data entry, and administrative drag. The bigger question is whether this kind of AI operating system becomes a must-have layer for firms trying to scale without burning out teams.

EY and Microsoft Invest $1bn in AI Transformation

EY and Microsoft’s expanded $1 billion AI partnership shows how aggressively major firms are betting on enterprise AI transformation. The initiative focuses on helping organizations apply AI across finance, tax, operations, and broader business functions, with Microsoft technology sitting at the center of the collaboration. For EY, this is not just a tech partnership; it is a service delivery bet. The next question is how clients turn that investment into measurable productivity, compliance, and decision-making gains.

Grant Thornton Unveils Innovative GTAP Audit Platform

Grant Thornton’s launch of GTAP marks a major push toward cloud-based, data-led audit delivery. The Grant Thornton Analytics & Automation Platform embeds analytics, automation, and AI across the audit lifecycle, starting with private company audits before expanding to public company work. The platform supports full-population analysis, automated workpapers, and future AI-driven risk detection under auditor oversight. The bigger story is how quickly audit teams move from traditional sampling toward real-time, tech-enabled assurance.

Final Thoughts

The May 2026 firm updates make one thing clear: accounting firms are not standing still. They are buying scale, building specialized practices, adding experienced leaders, and using technology to reshape how services are delivered. M&A activity points to continued regional and global expansion, while service updates highlight AI, sustainability, and audit transformation as major growth areas. People moves show firms investing in industry-specific expertise to support changing client needs. As 2026 continues, the profession could see more consolidation, deeper specialization, and stronger demand for professionals who can combine technical knowledge with advisory insight.