Top 25 accounting firm Aprio has acquired Isdaner & Co., a full-service accounting and advisory firm based in Bala Cynwyd, PA, effective June 1.
Financial terms of the deal weren’t disclosed. Led by Managing Partner Scott Isdaner, the Isdaner & Co. team of 10 partners and more than 70 professionals are expected to join Aprio.
This is private equity-backed Aprio’s sixth M&A deal of 2026. The firm has added two Oregon-based CPA firms—Delap LLP and Hoffman, Stewart & Schmidt PC—the SALT team from TaxOps in Denver, CAVU Advisors in Maryland, and Phoenix-based CPA firm Price Kong in May. In addition, Aprio launched Aprio Global in March to serve clients with cross-border tax, accounting, and advisory needs worldwide.
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Atlanta-based Aprio says the addition of Isdaner & Co. deepens its presence in the greater Philadelphia market and brings accounting, advisory, audit, and tax services together on one team for the region’s businesses and families.
“Isdaner & Co. has spent nearly six decades earning the kind of trust that defines what great client relationships look like. Client needs are growing more complex, and they deserve advisors who evolve with them,” Aprio CEO Richard Kopelman said in a statement on June 2. “We are building something different in Philadelphia, a firm where every client has trusted advisors who anticipate the challenges ahead, and who show up as true growth partners through every stage of the journey. That is the Aprio difference.”
Founded in 1967, Isdaner & Co. has built a highly regarded practice serving closely held businesses, high-net-worth individuals, and diversified organizations across the Delaware Valley. The firm provides a comprehensive suite of services, including accounting and auditing, tax services, trust and estate services, business consulting, and litigation support. Industries the firm serves includes real estate, manufacturing, nonprofit, family office, and high-net-worth.
“Joining Aprio is about what becomes possible for our clients and team in the future,” Scott Isdaner said in a statement. “Aprio expands what we can bring to every client. Whether they are growing, planning a transition, or thinking about the next generation, they now have access to a platform built for what they need. I’m proud of what we’ve built here, and I’m excited about what we will continue to build together.”
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