Actually someone sold 443k shares and someone picked it up at a lower price. Actually most of the "picking" up happened at a lower price. The seller struck first not the buyer.
And no they are not grabbing all they can get. Someone "grabbing all they can get" would mean that price should go up. It's more like..
Seller says: I'm selling 443k shares at xx Buyer says well I'll only buy it if you sell it at x not xx.