Plante Moran said on Monday that Wakefield, MA-based Tonneson + Co. will join the top 20 accounting firm, effective July 1.
Financial terms of the deal weren’t disclosed. Once the transaction closes, Tonneson’s team of more than 100 professionals will join Plante Moran.
The combination “marks a significant milestone in Plante Moran’s continued expansion along the East Coast and affirms both firms’ commitment to their clients and staff,” the Southfield, MI-based accounting firm said in a media release.
“For 100 years, Plante Moran has prioritized long-term stability and client success, which has fueled the firm’s steady growth,” Jason Drake, managing partner of Plante Moran, said in a statement. “Tonneson’s shared values and vision for the future make them an ideal partner. We’re excited to welcome their talented team and expand our presence in Boston.”
Founded in 1975, Tonneson is among the largest 25 accounting firms in the Boston area, providing audit, tax, and advisory services to clients—such as privately held businesses, individuals, and nonprofits—in multiple industries and international markets.
“We’re excited to join forces with Plante Moran—a 100-year-old, staunchly independent firm known for its award-winning culture,” said Tonneson CEO Rick Mastrocola. “This partnership allows our combined firms to further enhance the capabilities we offer both clients and staff while preserving the unique culture and relationships that have defined Tonneson and Plante Moran for decades.”
Throughout the firm’s 100 years in business, Plante Moran has grown to a staff of nearly 4,000 professionals throughout the U.S. with international offices in Shanghai, China; Mumbai, India; Tokyo, Japan; and Monterrey, Mexico. The firm provides a full line of audit, tax, consulting, and wealth management services to organizations in the manufacturing and distribution, financial services, service, healthcare, private equity, public sector, real estate, construction, and energy industries.
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