So unsold tokens in CCO will be burned ? Or there gonna be round 2 CCO or something like that ? And is there any info about Company's who did buy in CCO ?
CCO goes until mid July, and each is month is one stage.
At the end of each stage tokens will be burned!
Today a bit more then 2 billion token (10+ % of total supply) got burned!!!

I believe for March there were no CCO token sold.
yes. i checked on the investors account and it said:
Start Date : Thu, 01 Mar 2018 - 00:05:00 UTC
End Date : Sat, 31 Mar 2018 - 00:00:00 UTC
Stage Raised : $56.38
Stage Cap : $10,000,000
Token price : $0.01230896487
so they raised almost nothing in march.
next stage is now in april + another burn event will happen at the end of the month.