Top 20 accounting firms LarsonAllen and Clifton Gunderson announced plans to merge in January. The alliance will create one of the 10 largest accounting firms in the country. The new company will be called CliftonLarsonAllen, and will generate more than $550 million in combined revenue. CLA would have more than 500 partners, employ more than 3,600 professionals and operate from offices in 25 states and the District of Columbia. The firm will share headquarters in Milwaukee and Minneapolis.