Several Apple executives have become even richer after a stock selloff on Thursday, Fortune reports. Over a million restricted Apple shares became fully vested on Wednesday, and the next morning, four executives sold most of them under a Rule 10b5-1 trading plan. COO Tim Cook is noted to have profited most, having sold 300,000 shares at prices ranging from $226.90 to $230.70; the shares were originally worth $72.01 apiece. Cook's total haul is noted to have been $68.8 million, although $32 million was diverted to taxes.