Mid-Day Market Movers (UNCA, PRXI, DYN, ALY)

Unica Corporation UNCA jumped 117.28% to $20.75 at 10:26 am. IBM IBM has agreed to buy UNCA for $21 per share, or $480 million in a cash transaction, valuing UNCA at a premium of 120% over its previous session’s closing price. Premier Exhibitions Inc PRXI shares surged 60.34% to $1.86. United States District Court for the Eastern District of Virginia has issued an opinion to grant salvage award to PRXI for recovery of titanic artifacts. Dynegy Inc DYN climbed 59.35% to $4.43. Blackstone Group BX has agreed to buy DYN in a $4.7 billion deal. Allis-Chalmers Energy Inc ALY shares advanced 51.96% to $3.49. Seawell has agreed to acquire ALY for $890 million, or $4.25 per share in cash, valuing the company at 85% premium to its yesterday's closing price. Read more from Benzinga's Company news.