•    Alere Inc.’s (ALR) shares surged 45.5% after Abbott Laboratories (ABT) agreed to buy the company for around $5.8 billion

•    Shares of Questar Corporation (STR) skyrocketed 22.6% following news that Dominion Resources, Inc. (D) will acquire the company in a all cash deal of nearly $4.4 billion

•    Twitter, Inc.’s (TWTR) shares jumped 6.6% on news that Silver Lake Partners and investor Marc Andreessen may offer to acquire the company

•    Shares of Roper Technologies, Inc. (ROP) plunged 6.8% after reporting fourth quarter adjusted earnings of $1.82 per share, missing the Zacks Consensus Estimate of $1.86   
 

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