Benzinga's Top #PreMarket Gainers

shares climbed 9.89 percent to $182.10 in pre-market trading. bluebird bio will present LentiGlobin clinical data on June 13, 2015 at the 20th Congress of European Hematology Association.

shares rose 9.06 percent to $36.84 in pre-market trading after the company reported stronger-than-expected results for the first quarter on Thursday.

shares surged 5.49 percent to $74.01 in pre-market trading after the company reported better-than-expected earnings for the first quarter and lifted its sales outlook for the full year.

gained 2.98 percent to $25.89 in pre-market trading after the company reported stronger-than-expected earnings for the fiscal first quarter on Thursday.

shares gained 1.52 percent to $96.07 in the pre-market trading session after CVS Health Corp

announced its plans to buy Omnicare for about $12.7 billion.