Reputations are hard to budge. That may be one reason why the prestige rankings are nearly identical between 2018 and 2019 -- at least among the Top 10 firms. In fact, BCG gained a .1 of a point, with Oliver Wyman adding .334 to climb into the 10 most prestigious firms. Overall, Strategy& was the year's big winner, climbing three spots and gaining .63 of a point in prestige.