Allergan (AGN) - Get Allergan plc Report shares are rising on news the company is purchasing medical tech company Zeltiq Aesthetics (ZLTQ) for roughly $2.5 billion. Zeltiq is specializes in body-sculpting technology. The transaction gives Allergan exposure to the medical aesthetics space, an area that Allergan CEO Brent Saunders is bullish on. Shares of Allergan are up some 18% since the start of the year. TheStreet's Scott Gamm reports from Wall Street.