Are you being impartial?
Such a disappointment if not, I actually like your informative posts...
P.S. Surely with your knowledge, you can differentiate between a regular wallet vs. an exchange wallet?
It's a miner, these are generated blocks / coins. Exchanges don't mine. This is either the largest pool (>50% of the total coins) or the whale miner, in which case the address of the whale miner where he generated his coins is elusive to me but one could probably find out if he searched around the last POW blocks. He should be the most frequent finder of blocks. I'll take a look at it later.
(whale mining doesn't seem consolidated nor vastly disproportionate in light of the vast hashrates reported)
* Probably supernova if the above poster's identification of his address is correct.