The whole point of my posting is that we should look at this issue from the buyer's side.
Even as you claim all the whole transaction is done according to the books. The buyer who can buy $6.2 million in ARU shares are not simple retail investors ike us. It is likely an institution with the proper resources to do a full DD. Really how many 800,000 share block do you find in the open market and who would be the owners of such hugh holdings? That shoudl not be that hard to pin point. You mean an institutional buyer can't easily find out who the seller is via other avenues besides from the broker?
Again, all I am trying to point out is the buyer should have done its DD as well (and be satisfied that ARU is sound), even they may not be curious enough to ID the seller.