Benzinga's Top #PreMarket Gainers

Weight Watchers International, Inc. WTW shares climbed 29.34 percent to $5.29 in pre-market trading on takeover talks. Celsion Corporation CLSN shares rose 5.53 percent to $2.48 in pre-market trading after the company reported ongoing positive data from its Phase 2 DIGNITY study in breast cancer. Humana Inc HUM gained 3.19 percent to $193.48 in pre-market trading. Aetna Inc AET announced its plans to acquire Humana in a cash-and-stock deal valued at $35 billion. VIVUS, Inc. VVUS shares rose 0.87 percent to $2.33 in pre-market trading after dropping 0.43 percent on Thursday. American Airlines Group Inc AAL shares climbed 0.56 percent to $39.25 in pre-market trading after gaining 0.59 percent on Thursday.