Chicago-based juggernaut Kirkland & Ellis has continued to increase head count, revenue and profits firmwide. But in Los Angeles, key rainmakers are making less rain, and departures in the last six months have brought the 115-lawyer office to about 90 attorneys.

With some of its leading lawyers reaching a stage where they’re choosing to slow down, around 20 attorneys — half of them partners — have left the L.A. office over the last half year, some for top competitors.