CDW Corp., the parent company of government vendor CDWG, is having a big week on Wall Street. Thanks to an announcement by company officials that they expect to release a report of higher-than-expected first-quarter revenue, the stock jumped late last week about $5 a share to around $67 a share. CDW plans to announce its first quarter results April 24, according to bloggingstocks.com. No details on whether its government business has been better than average. However, CDW comes in fairly low (No. 34) on Government Executive's Top 50 Technology Contractors list.