Morning Market Gainers

shares jumped 33.53 percent to $127.00 after ACE Limited announced its plans to buy Chubb for $28.3 billion.

shares surged 24.36 percent to $2.91. The company issued preliminary data after the bell from a Phase 2A study of its treatment for a group of cancers called myelodysplastic syndromes.

shares gained 18.42 percent to $1.80 on the report of positive anatabine citrate study results.

shares surged 16.07 percent to $2.96 after the company reported a launch of FGFR1 amplification testing utilizing a patient's blood sample.

shares rose 10.92 percent to $17.06 after falling 2.47 percent on Tuesday.

shares jumped 9.68 percent to $111.52 after the company agreed to buy Chubb for $28.3 billion.

rose 9.5 percent to $1.83 after the company reported a private placement of $3 million in gross proceeds.

sharesrose 4.70 percent to $101.20 after gaining 0.43 percent on Tuesday.

shares surged 3.93 percent to $55.05 after the company reported that the underwriters of its earlier announced public offering of common stock have exercised in full their option to purchase an additional shares.