Simpson Thacher & Bartlett’s transactional hot streak continued Friday, only days after counseling British telecommunications giant Vodafone on the third-largest M&A deal in history.

The firm’s long-standing private equity connections helped it pick up key roles on two other large deals announced this week, such as advising Global Tower Partners on its $3.3 billion sale to American Tower Corp., and KKR on its $1.1 billion buy of Mitchell International from Aurora Capital Group.