Benzinga's Volume Movers

shares climbed 57.52 percent to $62.77. The volume of DealerTrack shares traded was 8543 percent higher than normal. DealerTrack agreed to be acquired for $4 billion, or $63.25 per share by Cox Automotive in an all-cash transaction.

surged 5.68 percent to $45.22. The volume of Ryland Group shares traded 419 percent higher than normal.

and Ryland Group agreed to merge in an all-stock transaction.

shares moved up 11.13 percent to $16.27. The volume of Ardelyx traded was 346 percent higher than normal. Ardelyx's trailing-twelve-month revenue is $28.96 million.

shares rose 5.28 percent to $20.72. The volume of Papa Murphy's shares traded was 182 percent higher than normal. Papa Murphy's shares have jumped 114.61 percent over the past 52 weeks, while the S&P 500 index has surged 8.07 percent in the same period.