Benzinga's Volume Movers

QR Energy LP

shares moved up 9.27% to $20.62. The volume of QR Energy shares traded was 1295% higher than normal. Breitburn Energy

announced its plans to buy QR Energy LP for around $3.0 billion in a unit-for-unit transaction. QR Energy reported a Q2 loss of $1.05 per share on revenue of $133.30 million. Logitech International SA

shares rose 15.08% to $15.34. The volume of Logitech International shares traded was 1092% higher than normal. Logitech reported better-than-expected quarterly results and raised its operating income forecast. VASCO Data Security International

surged 18.36% to $13.73. The volume of VASCO Data Security shares traded 834% higher than normal. VASCO reported upbeat quarterly results and issued a strong FY14 revenue forecast. Unisys

shares climbed 7.25% to $21.53. The volume of Unisys shares traded was 473% higher than normal. Susquehanna upgraded Unisys from Neutral to Positive.