MCLEAN, Va.--(BUSINESS WIRE)--Hilton Worldwide Holdings Inc. (NYSE: HLT) will report second quarter financial results prior to the stock market open on Wednesday, July 29, 2015, followed by a conference call at 10:00 a.m. Eastern Time. Christopher J. Nassetta, Hilton Worldwide's president and chief executive officer, and Kevin Jacobs, Hilton Worldwide's executive vice president and chief financial officer, will discuss the company's performance and lead a question-and-answer session. Participan