DAVOS, Switzerland — Apple CEO Tim Cook is on his first trip ever to the World Economic Forum, meeting high profile world leaders, amid mounting troubles for the technology giant.

Details of what he did and whom he met have not been made public but pictures have surfaced on social media of some of his meetings.

Cook's attendance at Davos comes after Apple recently slashed first-quarter revenue guidance and as it faces problems in China.

An Apple spokesperson has not responded to a request for comment from CNBC.

Here's what we know Cook did at Davos.