It seems like #4 just send 20k DASH to Poloniex a few hours ago.
https://chainz.cryptoid.info/dash/tx.dws?2300795.htm
&
https://chainz.cryptoid.info/dash/address.dws?XrHLQmgzQtY2oxvkhTeyxXADg48G2CAkYy.htm
So DASH isn't that anonymous after all it seems.
This shouldn't surprise anybody. Blockchain analysis is turning into a pretty big field, and the same principles that apply to Bitcoin will apply to DASH. Yes DASH has a mixer, but at its heart it works the same as Bitcoin utilizing addresses and transactions that are publicly accessible and traceable. Unless the DASH team is working non stop to harden their mixing service it will eventually be defeated. Or at least somebody will have a software tool that is able to correlate addresses well enough to de-anonymize the largest users.