Benzinga's Volume Movers

Medivation Inc MDVN surged 19.7 percent to $80.43. The volume of Medivation shares traded was 4158 percent higher than normal. Pfizer Inc PFE and Medivation struck a definitive deal through which the former would buy the latter for $81.50 a share in cash.
Intersil Corp ISIL shares moved up 19.1 percent to $18.62. The volume of Intersil traded was 1148 percent higher than normal. Intersil shares rose following a report it was near a deal to be acquired by Renesas Electronics for up to $2.99 billion.
Crossamerica Partners LP CAPL shares climbed 2.9 percent to $25.94. The volume of Crossamerica Partners shares traded was 639 percent higher than normal. Crossamerica Partners shares have climbed 19.53 percent over the past 52 weeks, while the S&P 500 index has gained 15.35 percent in the same period.
The GEO Group Inc GEO shares rose 4.1 percent to $24.65. The volume of GEO Group shares traded was 526 percent higher than normal. GEO Group shares have declined 20.08 percent over the past 52 weeks, while the S&P 500 index has gained 15.35 percent in the same period.