Benzinga's Volume Movers

shares climbed 4.54 percent to $72.49. The volume of St. Jude Medical shares traded was 1633 percent higher than normal. i

is working on a $25 billion bid for St. Jude Medical, the FT reported.

surged 8.58 percent to $54.17. The volume of Greatbatch shares traded 422 percent higher than normal. Greatbatch announced its plans to acquire Lake Region Medical for $1.73 billion.

shares moved up 2.62 percent to $74.30. The volume of Workday traded was 391 percent higher than normal. Workday reported a Q2 loss of $0.3 per share on revenue of $282.7 million.

shares rose 3.18 percent to $61.91. The volume of Cameron International shares traded was 208 percent higher than normal. Global Hunter downgraded Cameron from Buy to Neutral.