Strategic Acquisition Tonneson + Co has joined Plante Moran as of July 1, 2025, signaling a broader integration into a top-tier national firm. This creates opportunities to cross-sell tax, consulting, and wealth management services to newly combined client bases and leverage Plante Moran’s expanded geographic footprint.

Expansion Opportunities Recent and ongoing international growth by Plante Moran, including Amsterdam and Latin America expansions, suggests potential for bundled advisory, ERP, and cross-border compliance services for clients at Tonneson + Co seeking multinational capabilities.

Technology Alignment The firm’s tech stack includes Azure Databricks, Redshift, GitHub, and DocuSign, indicating openness to cloud analytics, automation, and digital workflow solutions. This creates opportunities to upsell data analytics, automation, and secure e-signature integrations for clients.

Industry Recognition Notable leadership recognition and a strong growth narrative around Plante Moran’s culture and client service position the combined entity as a trusted partner for mid-market organizations seeking governance, risk, and assurance enhancements.

Financial Scale With revenue in the mid six-figure to seven-figure range and a footprint tied to a global brand, there is an opportunity to propose scalable solutions in audits, tax optimization, and advisory services to mid-sized local clients looking for national-level resources.