Morning Market Movers

bluebird bio

jumped 52.24% to $39.72 following the presentation of positive data on LentiGlobin BB305 at the European Hematology Association (EHA). Covidien plc

shares climbed 27.76% to $92.01 after Medtronic

announced its plans to buy Covidien for $42.9 billion in cash and stock. Fusion-io

gained 22.85% to $11.40 after SanDisk

announced its plans to buy Fusion-io for $11.25 per share in cash. Achillion Pharmaceuticals

shares surged 17.11% to $7.58 after Maxim Group analyst Jason Kolbert raised the price target on Achillion from $6.00 to $22.00. Astea International

climbed 16.50% to $2.40 after the company announced a 2-year revolving line of credit from Silicon Valley Bank for $3 million. Williams Companies

shares surged 16.28% to $54.86 following the announcement of acquisition of Global Infrastructure Partners' GP and LP interests in Access Midstream Partners for $5.995 billion. DARA BioSciences

climbed 15.18% to $1.29 after the company reported that KRN5500 has won the FDA's Orphan Drug Designation. TW Telecom

gained 11.20% to $40.41 after the company agreed to be acquired by Level 3 Communications

in a stock-and-cash transaction valued at $40.86 per share. Limelight Networks

climbed 6.54% to $3.02 following the announcement of $6.55 per share bid from PE firm Tuition Build. Motorcar Parts of America

climbed 5.37% to $25.11 on upbeat Q4 earnings. The company reports its quarterly earnings of $0.43 per share on revenue of $76.70 million. Sequenom

rose 5.23% to $3.22 after the company reported the US FDA premarket clearance to market two tests. Compugen

shares increased 3.42% to $8.46 after the company reported positive experimental results for novel checkpoint candidate CGEN-15052. Medtronic

shares rose 3.08% to $62.57 after the company announced its plans to buy Covidien. Newcastle Investment

rose 2.56% to $5.01 after the company announced its plans to spin-off its senior housing unit. Violin Memory

gained 2.53% to $4.05 following the deal between SanDisk and Fusion-io.