He was one of the largest shareholders. One third of the company in fact... but he sold most of those way back when they were worth almost nothing (as in hundreds of dollars). And as far as we know virtually all the rest of his shares since then have been gifted to charities. Mostly schools.

"I do not invest. I don't do that stuff. I didn't want to be near money because it could corrupt your values." -- Steve Wozniak, five years ago

He makes a good living doing speeches at universities/etc - that's his primary wealth, not his shares in Apple. If he had kept even a tenth of the shares he once owned, he'd be richer than Elon Musk. As it is, the house he lives in is likely more than half of his total worth (it's a nice house, with six bedrooms, in a nice location... more than most people can afford but hardly extravagant, 6 bedrooms is enough to host a large family holiday party, which I think is quite reasonable).