Mid-Day Gainers From November 24: Prosensa, Cimatron, Platinum Underwriters, Five Prime Therapeutics, Tetraphase Pharmaceuticals

Prosensa Holding NV RNA +61% - Shares are up sharply following an announcement that BioMarin Pharma will acquire Prosensa for $17.75 per share.

Cimatron Ltd. CIMT +43% - The company announced that 3D Systems Corporation will acquire Cimatron for $97 million.

Platinum Underwriters Holdings, Ltd. PTP +20% - The company announced that RenaissanceRe Holdings Ltd. will acquire Platinum Underwriters For $1.9 billion.

Five Prime Therapeutics Inc FPRX +18% - Shares are appreciating following an announcement that Bristol-Myers Squibb and Five Prime Therapeutics have entered into an exclusive clinical collaboration agreement.

Tetraphase Pharmaceuticals Inc TTPH +13% - The company is exploring sale options following interest from potential suitors.