Benzinga's Volume Movers (ALKS, NUAN, BSFT, ROSE)

Alkermes Inc ALKS shares moved up 4.94% to $15.19 at 10:25 am. The volume of ALKS shares traded was 388% higher than normal. Alkermes Inc ALKS announced its plans to merge with Elan Drug Technologies, the drug formation and manufacturing unit of Elan Corp. PLC ELN in a deal valued at $960 million. Nuance Communications Inc NUAN shares rose 8.06% to $21.71. The volume of NUAN shares traded was 375% higher than normal. NUAN's trailing-twelve-month revenue is $1.16 billion. BroadSoft Inc BSFT shares climbed 3.84% to $44.84. The volume of BSFT shares traded was 359% higher than normal. BSFT reported upbeat Q1 results. Rosetta Resources Inc ROSE shares gained 11.90% to $45.99. The volume of ROSE shares traded was 186% higher than normal. Rosetta reported its Q1 net income at $11.0 million, up from $7.3 million, in the year-ago period. Read more from Benzinga's Markets.