the majority of billionaires are billionaires due to stock holdings, usually in their own company. stock ownership of the largest shareholders in public compan

the majority of billionaires are billionaires due to stock holdings, usually in their own company. stock ownership of the largest shareholders in public companies are public and reported several times a year. absolutely no one should think that their stock trading activity is private - it's constantly being reported to the IRS, SEC, FINRA, whatever.