Typically, a firm roughly the size of Fox Rothschild might do billable work for 5,000 or 6,000 clients per year, according to James Young, administrative partner for litigation.

Fox Rothschild, however, bills somewhere around 15,000 clients per year, he said.

“To me the number-one thing is our client base,” said Young, who practices in the Philadelphia-based firm's Lawrenceville office.