Binance jus got its first weekly power down of its 31 M SP.
Look what happened next.
The 
Now I'm not sure are this large amounts of STEEM purchased or they were in someone possession who is now just transferring them. Looking at the price (not much affected) looks like those were funds already owned from someone, that are now just transferred around. Maybe some of the Steemit Inc share that was on exchanges? Its unknown.
There are some more withdrawals that happened from Binance and if you want to take a look here is the wallet:
https://steemitwallet.com/@binance-hot/transfers
Here are some of the large transfers:
The EU bitvavo exchange :)
There is more than just these two to the 
Another exchange :)
Intersting there are few transactions to bittrex as well.
Next a friend of ours:
And some creative users withdrawals.
Anyways, the 