NOV and Oil States complete spinoffs, trading begins By: Houston Business Journal via Business Journals June 02, 2014 at 10:41 AM EDT Two of Houston’s largest public energy companies — National Oilwell Varco Inc. (NYSE: NOV) and Oil States International Inc... Read More >> Related Stocks: Natl Oilwell Varco Oil States International Servicenow Inc iPath Dow Jones-Goldman Sachs Crude Oil Fund