Benzinga's Top Pre-Market Gainers

Sarepta Therapeutics

surged 133.56% to $35.01 in the pre-market session. Sarepta Therapeutics reported that treatment with its eteplirsen met its primary endpoint in a Phase IIb extension trial in Duchenne muscular dystrophy patients. MetroPCS Communications

added 6.85% to $14.50 in the pre-market session. MetroPCS board has approved merger with Deutsche Telekom's T-Mobile USA unit, according to German newspaper Financial Times Deutschland. Best Buy Co

moved up 3.01% to $17.48 in the pre-market session. Best Buy shares have dropped 26.73% over the past 52 weeks, while the S&P 500 index has gained 28.63% in the same period. Family Dollar Stores

soared 2.27% to $67.50 in the pre-market trading. Family Dollar reported a rise in its fiscal fourth-quarter profit.