U.S. IPO market on track for best year since 2007 By: MarketWatch May 13, 2013 at 07:49 AM EDT Firms have raised $16.8 billion through IPOs so far this year, and last week was the busiest since December 2007. Read More >> Related Stocks: Blackstone Inc Boise Cascade L.L.C. Bright Horizons Family Solutions Inc Facebook Seaworld Entertainment Inc Company Zoetis