PKF O'Connor Davies merges in Rainer

PKF O'Connor Davies, a Top 25 Firm based in New York, is adding Rainer & Co., a firm based in Philadelphia.

Financial terms of the deal were not disclosed. Rainer has four shareholders and 25 staff members. After the acquisition, PKFOD will have approximately 1,800 employees. PKFOD ranked No. 25 on Accounting Today's 2025 list of the Top 100 Firms, with $410 million in annual revenue and 214 partners.

"Adding Rainer & Company aligns with PKF O'Connor Davies' overall growth strategy. We are continuing to thoughtfully expand our talented team in regions and practice areas that will allow us to best leverage our platform for our growing client base" said PKF O'Connor Davies CEO Kevin Keane in a statement Monday.

Rainer was founded in 1954 and offers a variety of accounting, tax and business advisory services to commercial, individual, not-for-profit and government clients. It specializes in industries including construction, real estate and manufacturing, as well as employee retirement plans.

"Joining forces with PKF O'Connor Davies not only represents a significant milestone in our firm's history but it also broadens their growing regional presence," said Rainer managing shareholder Joseph Fabrizio in a statement. "Our partnership will yield ongoing benefits for our clients, including access to PKF O'Connor Davies' industry-leading resources, global network and top-notch experts. I look forward to our continued work together."

Ira Rosenbloom of Optimum Strategies served as strategic partner to both parties in the deal.

Last November PKFOD announced strategic growth investment from the Public Sector Pension Investment Board, one of Canada's largest pension investment managers, and Investcorp, which formerly owned Accounting Today's parent company. The firm said it's continuing to advance its market expansion, introducing new services across various industries and regions.

In January 2924, PKFOD merged in Robert Philipson & Co., a firm in Silver Spring, Maryland. In 2023, PKF O'Connor Davies merged in Archambault & Associates, a firm in Wakefield, Massachusetts, that specializes in trust and estate matters and private client group services. In 2022, PKFOD added Judelson, Giordano and Siegel, a firm in Middletown and Poughkeepsie, New York, and Simon, Tapper, Edelman & Wilner, a firm in Hackensack, New Jersey. In 2021, it acquired another New Jersey firm, LB Goodman & Co., in Fair Lawn, and added DGC LLP (formerly DiCicco, Gulman & Co.), in Boston.