Mintz Levin falls from 100 richest law firms; several Massachusetts firms tumble in rankings

Some of Boston’s largest law firms dropped in The American Lawyer’s annual ranking of the 100 highest-grossing firms, but Mintz, Levin, Cohn, Ferris, Glovsky and Popeo stands out in particular. That's because it disappeared from the list entirely. The global giant DLA Piper, which has about 70 attorneys in Massachusetts, topped the list in 2013, but fell to third in the latest ranking due to a year of stagnant revenue. Latham & Watkins, which has just over 50 attorneys in the state, took over…