Plante Moran is headed back to Mexico—the top 15 U.S. firm has added Guadalajara-based accounting firm JA Del Río in a deal expected to close on July 1.
Financial terms of the deal weren’t disclosed. JA Del Río’s 500-plus team members across Mexico, Colombia, and Costa Rica will join Plante Moran’s existing Mexico team. The Southfield, MI-based firm has an office in Monterrey.
This is Plante Moran’s first M&A deal in 2026. Last year, the firm merged with Wakefield, MA-based accounting firm Tonneson + Co.
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Plante Moran says the addition of JA Del Rio is its largest international expansion to date, part of a strategy to enhance its global presence across Latin America, Asia-Pacific, and Europe.
“After having a presence in Mexico for nearly 20 years, we’re excited to expand Plante Moran’s presence in Latin America by welcoming JA Del Río into our firm,” Jason Drake, managing partner of Plante Moran, said in a statement on May 6. “The firm’s values align with ours, with a focus on delivering high-quality client service, technical excellence, and deep expertise across industries and borders.
“JA Del Río has been a trusted collaborator of ours for years, and their addition marks an important step forward in our international growth,” he added.
Founded in 1988, JA Del Río is known for its experience in audit, tax, and consulting services. Serving clients across five continents, the firm helps global businesses navigate international trade, tax, risk, and business growth.
In addition to its locations in Mexico—which include Guadalajara, León, Mexico City, Monterrey, and Tijuana—the firm has offices in Bogotá and Medellín, Colombia; and San Jose, Costa Rica.
JA Del Río is a four-time recipient of ClearlyRated’s Best of Accounting award, receiving an 82% net promoter score, a benchmark that reflects high levels of client satisfaction and loyalty.
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“We have partnered with Plante Moran for many years, and from day one, it was evident the values and client approach we share was a strategic advantage for our mutual clients,” Bernardo Del Río, managing partner of JA Del Río, said in a statement. “This combination enhances how we serve clients in Mexico, Colombia, and Costa Rica, bringing additional depth and cross‑border capabilities while preserving the high standard of service they rely on.”
Together, the firms serve clients in manufacturing and distribution, service, health care, life sciences, private equity, financial services, real estate, construction, energy, and more.
“Our firms are closely aligned culturally, sharing people-first values, genuine humility, and a strong sense of responsibility,” Alejandro Rodriguez, leader of Plante Moran Mexico, said in a statement. “I’m looking forward to welcoming the team at JA Del Río and working together to advance our shared vision for sustainable growth, operational excellence, and strong client relationships.”
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