Tim Cook has been CEO for 15 years and is about to step down on September 1, so Apple threw a little party in his honor on August 23 with 200 people in attendance.

Apple CEO Tim Cook gets one last little celebration before stepping down September 1
Apple likes to throw a party on occasion, and the latest is a kind of going away/anniversary present for outgoing CEO Tim Cook. He’s not really going anywhere though, as he’s sticking around as Executive Chairman and acting as a kind of government liaison.
A report from The Information first covered by MacRumors details the party thrown at Apple Park for Tim Cook. Around 200 people attended with OneRepublic performing on August 23. The date is significant because Cook became CEO 15 years ago today and steps down on September 1.