compared to other CEO compensations, that's actually pretty low compensation comparatively (from this analysis of Fortune 100 CEO compensations: https://craft.co/reports/fortune-100-ceo-salaries)
Using Cook as an example, given he was previously awarded 7 million shares of AAPL, if you averaged that out over time he'd be right at or near the top. From another article:
> Cook did not receive a stock award in 2017, after receiving a large award of 7 million shares that vests on an elongated schedule through 2021 upon being named the successor to Apple co-founder Steve Jobs in 2011. That award was valued at $378 million at the time, making him the highest paid CEO of that year.