Aetna has ~50,000 people so this is 450m/50k = 9,000$ each for them not exactly nothing. CVS has more workers but they are paid less so 1,900$ means ~1.5 months of pay to someone making 7.25$ an hour before taxes.

I don't mean to suggest this is a significant issue on it's own, but high level executive compensation really does add up to a significant cost at large corporations. And really, this is just stock compensation he received other pay and benefits.