Benzinga's Top #PreMarket Gainers

Ruby Tuesday RT shares jumped 17.91% to $6.98 in pre-market trading after the company posted a narrower-than-expected adjusted loss for its fiscal first-quarter and raised its 2015 profit margin outlook. Auxilium Pharmaceuticals AUXL shares climbed 10.89% to $33.00 in pre-market trading after Endo International ENDP announced its plans to acquire Auxilium Pharma in a cash and stock deal for $2.6 billion. Ballard Power Systems BLDP shares jumped 4.71% to $3.11 in pre-market trading after the company reported a multi-year fuel cell supply deal with Plug Power PLUG for forklift market. PepsiCo PEP shares rose 2.21% to $95.16 in pre-market trading after the company reported better-than-expected third-quarter earnings and lifted its earnings forecast for the year.