Tim Cook is worth at least $625.37 million, according to a 2017 estimate by data company Equilar, Time reports.
Cook's actual net worth is certainly even higher than that — but information on his property, investment portfolio, and cash on hand isn't publicly available.
That's relatively low compared to other tech CEOs. Jeff Bezos, Bill Gates, Mark Zuckerberg, and Larry Page are all worth tens of billions.
Despite being a multimillionaire, Cook is remarkably frugal. He reportedly buys his underwear at Nordstrom's semiannual sale.
Cook spends most of his time at the office — which reportedly includes waking up at 3:45 a.m. to start reading and responding to emails.
Source: Business Insider
As for travel, Cook is often on the move for work. Apple spent $93,109 last year on Cook's private plane alone.
Source: Apple regulatory filing from 2018
But he keeps it domestic when it comes to personal travel, visiting spots like Yosemite National Park.
One of his known vacations was to New York City with his nephew. He showed the tween boy around the New York Stock Exchange in 2016.
Indeed, Cook's most-known hobby is his love of fitness, hiking, and cycling.
And, besides paying for his nephew's college education, Cook plans to give away all of his money to charity when he dies. "You want to be the pebble in the pond that creates the ripple for change," he told Fortune in 2015.