Early this month we wrote about the pick-up in M&A activity around pharmacy benefits management (PBM) companies, particularly as private equity firms made exits. Last week, another PBM made M&A news, as Magellan Health (NASDAQ: MGLN) paid $55 million to acquire 4D Pharmacy Management Systems in Troy, Michigan. 4D Pharmacy has strong presence in the growing markets of Medicare, dual eligible and healthcare exchanges. Plus, Magellan expects 4D to produce approximately $400 million in revenue in 2015, pre- and post-acquisition.