Benzinga's Volume Movers

shares rose 45.29 percent to $54.02. The volume of Alere shares traded was 4785 percent higher than normal.

announced plans to acquire Alere for $5.8 billion.

surged 25.85 percent to $13.29. The volume of AMAYA shares traded was 2609 percent higher than normal. AMAYA's CEO David Baazov announced intention to acquire Amaya for C$21 per share.

shares moved up 21.68 percent to $24.81. The volume of Questar traded was 593 percent higher than normal.

agreed to buy Questar for around $4.4 billion.

shares climbed 5.83 percent to $42.09. The volume of SYSCO shares traded was 173 percent higher than normal. SYSCO reported better-than-expected earnings for its second quarter.