HOUSTON--(BUSINESS WIRE)--PROS Holdings, Inc. (NYSE: PRO), a big data software company, today announced that the company will webcast its Cloud-First Update, which will take place in New York City on Wednesday, June 17, 2015. The presentation will begin at 10:00 a.m. ET, and the live webcast will be available on the “Investor Relations” section of the company’s website at www.pros.com. Following the event, a webcast replay will be available for one year. About PROSPROS Holdings, Inc. (NYSE: PRO