Here were some of his key findings:
"About 40% of Apple’s owners are individual investors. Within this group, Chairman of the Board Art Levinson, with an estimated half a billion dollars’ worth of shares, is the largest holder," Martins said.
Art Levinson has been on Apple's board since 2011.
Curious about who also made the list?
There's one individual investor that may surprise you.
Watch the video above to find out more.
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