Benzinga's Top #PreMarket Gainers

shares rose 22.38 percent to $13.89 in pre-market trading after the company agreed to be acquired by Siris Capital Group in an all-cash deal valued at around $1 billion.

shares jumped 5.71 percent to $79.00 in pre-market trading. ZS Pharma confirmed an earlier Bloomberg report, that it had preliminary discussions with

regarding a potential deal.

shares rose 1.43 percent to $32.20 in pre-market trading after gaining 0.49 percent on Thursday.

gained 1.36 percent to $28.40 in pre-market trading after rising 0.76 percent on Thursday.

shares climbed 1.27 percent to $57.21 in pre-market trading after rising 0.36 percent on Thursday.