Active traders and day traders have many stocks to choose from this Thursday morning. We are tracking news and  moves in shares of Caliper Life Sciences, Inc. (NASDAQ: CALP), Micron Technology, Inc. (NASDAQ: MU), and Suntech Power Holdings Co. Ltd. (NYSE: STP).

Caliper Life Sciences, Inc. (NASDAQ: CALP) is up nearly 42% premarket to $4.83, relative to a 52-week range of $3.31 – $8.68. PerkinElmer agreed to purchase the company for $600 million, ore $10.50 per share.

Micron Technology, Inc. (NASDAQ: MU) is down 2.5% premarket to $5.91, relative to a 52-week range of $5.18-$11.95.

Suntech Power Holdings Co. Ltd. (NYSE: STP) is up 3.4% premarket to $4.83, relative to a 52-week range of $4.48 – $10.83.