Morning Market Movers

shares jumped 34.01% to $46.85 on analyst upgrade and several price target raises.

shares surged 28.77% to $8.28.

gained 20.33% to $1.42. RBC Capital upgraded Key Energy Services from Sector Perform to Outperform and lowered the price target from $5.00 to $4.00.

shares climbed 15.80% to $4.25 after gaining 11.55% on Wednesday. VimpelCom announced the launch of its 'Make Your Mark' initiative.

shares surged 13.43% to $3.80 after the company announced that its Phase 3 Study of GSK Shingles Vaccine containing Agenus Adjuvant met primary endpoint.

shares surged 12.78% to $6.83 after the company reported upbeat Q3 earnings and raised its FY15 outlook

shares climbed 12.76% to $6.01 after the company raised its FY14 guidance.

shares jumped 9.60% to $3.54 after rising 24.23% on Wednesday.

shares surged 6.20% to $43.71 after the company reported better-than-expected fiscal second-quarter results.

shares gained 4.83% to $21.04 after the company reported upbeat first-quarter results and issued a strong outlook.