HOUSTON--(BUSINESS WIRE)--PROS® (NYSE: PRO), a big data software company, today announced plans for its Outperform 2015 conferences in the United States and Europe. The annual events bring together industry and analyst thought leaders; seasoned pricing, sales and revenue management practitioners; and business-to-business experts for interactive sessions, executive meetings and networking, all focused on using data to outperform. In the United States, PROS will host Outperform participants in it