Wipfli LLP began in 1930 when Wisconsin native Clarence Wipfli opened an accounting practice in Wausau, Wis., where the firm's headquarters stand to this day. In 1942, John Ullrich became the firm's first managing partner, and the business was rechristened Wipfli Ullrich & Co. a few years later. The firm's expansion across the Midwest was propelled by its founders' determination to recruit top talent and provide ongoing training for its employees. Wipfli now has 45 offices in the U.S., two offices in India, and more than 2,400 employees. It's also a member of PKF North America, the North American member of PKF International, one of the world’s 10 largest global accounting networks.

In 2021, Wipfli ranked No. 19 on Accounting Today's Top 100 Firms list, a ranking of the largest firms by annual revenues. The firm brought in $402 million in revenues during its latest fiscal year.