Citing a strategy to boost its core strengths and expand on the West Coast, Winston & Strawn has acquired Los Angeles-based Scheper Kim & Harris, a 15-lawyer white-collar and complex litigation boutique.

The Chicago-based firm, ranked 40th in the most recent Am Law 100, also announced Tuesday a separate, three-lawyer pick-up in real estate restructuring from Sidley Austin, bringing its new lawyer addition this week to 18 and its head count in Los Angeles to just under 90 lawyers.