Benzinga's Volume Movers

Greenhill & Co

shares moved up 1.31% to $51.93. The volume of Greenhill shares traded was 912% higher than normal. Bernstein initiated coverage on Greenhill with a Market Perform rating. Rackspace Hosting

shares rose 9.37% to $30.11. The volume of Rackspace Hosting shares traded was 467% higher than normal. Rackspace reported better-than-expected first-quarter earnings. Rackspace reported its quarterly earnings of $0.18 per share on revenue of $421 million. Concho Resources

shares climbed 1.15% to $131.43. The volume of Concho Resources shares traded was 422% higher than normal. Concho Resources priced its upsized offering of 6.5 million shares at $129 per share. MYR Group

surged 6.26% to $26.13. The volume of MYR Group shares traded was 406% higher than normal. Avondale added MYR Group to Conviction list.