Bain is back! After ceding the top spot to McKinsey in 2018, Bain has returned with a vengeance, edging out BCG and McKinsey for the top spot. This year's biggest move belonged to Booz Allen Hamilton, which climbed from 21st to 4th. By the same token, The Parthenon Group cracked the Top 5, displacing Oliver Wyman in the process. Clearview Healthcare Partners, a long-time boutique darling, also rocketed into the Top 10 at #7. Alvarez & Marsal also made their Top 10 debut in 2021, climbing 10 spots to do just that.