The bulk of that is from his total stock options and shares in Apple, which total nearly $622 million. Cook is also on the Nike board of directors, where he has $3.4 million in stock options.
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.
Even though Apple is the highest-value company on the planet, there's only one known Apple-related billionaire: Laurene Powell Jobs, who is Apple cofounder Steve Jobs' widow.
In 2017, Cook's salary as CEO was $3 million. That's up from his first year as CEO in 2011, when his salary was $900,000.
Sources: Apple regulatory filings from 2018 and 2012
Cook, who came out as gay in 2014, is not married and has no children. He leads a private, solitary life, but here's what we know about how he spends his fortune...
"I like to be reminded of where I came from, and putting myself in modest surroundings helps me do that," Cook said. "Money is not a motivator for me."
As of 2012, Cook lives in a $1.9 million Palo Alto home that's 2,400 square feet. That's relatively modest for the ritzy Bay Area city, which now has a median home value of $3.3 million.
And Cook plans to give away all of his money to charity when he dies. He has no children of his own, and wants to create a better world for his nephew. "You want to be the pebble in the pond that creates the ripple for change," he told Fortune in 2015.
Trump was entertaining donors at his Mar-a-Lago Florida retreat on Friday night, and told the audience that he actually said "Tim Cook Apple," he just said it quickly and his pronunciation of "Cook" was quiet.
He later turned to his favorite line of attack, Axios said, calling out the "fake news" for focusing on the "Tim Apple" remark. Axios said donors in the room were mystified. "I just thought, why would you lie about that," one said.
Here's a video of the moment again, so you can decide for yourself:
