ISTA Pharmaceuticals Inc. (NASDAQ:ISTA) is up 73.52% in midday trading at $6.75. ISTA has traded 4.5 million shares so far today, well above its daily average of 198 thousand shares. ISTA stock is up today after Valeant offers to buy ISTA for $6.50 per share. The company has a market cap of 282.21 million.

RSC Holdings, Inc. (NYSE:RRR) is up 55.50% in midday trading at $17.68. RRR has traded 50.4 million shares so far today and trades 1.2 million shares a day on average. RRR stock is up today after United Rentals announced it will buy RSC for $1.9 billion. RSC Holdings has a market cap of 1.83 billion.

Morton’s Restaurant Group, Inc. (NYSE:MRT) is up 32.56% today at $6.84. MRT has traded 5.4 million shares so far today, way above its daily average of 24 thousand shares. MRT stock is up today after Fertitta signed agreement to acquire Morton’s Restaurant Group for $6.90 a share. The company has a market cap of 115.60 million.

CryptoLogic Limited (NASDAQ:CRYP) is up 43.04% today at $2.26. CRYP has traded 788 thousand shares so far today, well above its daily average of 29 thousand shares.CRYP announced on Thursday board agreed to offer by Amaya Gaming Group at $2.50 a share. CryptoLogic has a market cap of 31.09 million.

Gulf Resources, Inc. (NASDAQ:GURE) is up 12.20% in midday trading at $1.8498. GURE has traded 419 thousand shares so far today, above its daily average volume of 340 thousand shares. Gulf Resources announced today they have commenced operations after relocation of one of its factories. The company has a market cap of 63.59 million.

Cobalt International Energy, Inc. (NYSE:CIE) is up 16.33% today at $10.47. CIE has traded 2.1 million shares so far today, more than double its daily average. The company has a market cap of 4 billion.