PwC has agreed to an alliance with U.S. immigration specialist law firm Fragomen in one of the most significant examples to date of the Big Four joining forces with a law firm. 

The alliance between PwC UK and Fragomen—which has more than 50 offices around the world and posted revenue of $577 million (£441 million) for 2017—will hand PwC a major foothold in the U.S. market, where the New York-based firm has 16 offices across all major financial centers.