He bought in around 400-410 he wants to make 100-150 before he dumps. You can view this in his sec filings. I'm assuming he wants to make 100-150 per share as his target was in the 600 range which really means he is dumping around 500-550.
to protect himself from sec, he probably used 6 hops proxy, so when sec asks stupid questions he can say his twitter account got hacked, sell stock anyway and walk free for thank you dinner