Benzinga's Top Pre-Market Gainers

Convio Inc CNVO surged 48.42% to $15.94 in the pre-market session. Blackbaud Inc BLKB agreed to acquire Convio Inc for around $294 million. ISTA Pharmaceuticals Inc ISTA added 11.97% to $8.14 in the pre-market session. Valeant Pharmaceuticals International Inc VRX raised proposed price for acquisition of ISTA from $6.50 to $7.50 per share. Tesla Motors Inc TSLA moved up 11.45% to $25.40 in the pre-market session. Analysts at Wunderlich Securities upgraded Tesla Motors from “hold” to “buy.” Questcor Pharmaceuticals Inc QCOR soared 4.58% to $38.15 in the pre-market trading. QCOR's PEG ratio is 0.73.