Benzinga's Top #PreMarket Gainers

Oncothyreon Inc (USA) ONTY shares climbed 32.16 percent to $4.52 in pre-market trading following the presentation of positive ONT-380 data in HER2-positive breast cancer at the ASCO. ImmunoGen, Inc. IMGN gained 21.02 percent to $10.88 in pre-market trading following a report that IMGN853 demonstrated notable single agent activity for patients with platinum-resistant ovarian cancer. Vascular Biogenics Ltd VBLT shares climbed 20.50 percent to $9.70 in pre-market trading following the presentation of Phase 1/2a data from VB-111 in recurrent platinum-resistant mullerian cancer at the ASCO. Prana Biotechnology Limited (ADR) PRAN shares surged 18.53 percent to $1.60 in pre-market trading following the announcement of the EC orphan designation of PBT2. Exelixis, Inc. EXEL shares rose 11.11 percent to $3.50 in pre-market trading following the announcement of positive Phase 2 cabozantinib results at the ASCO.