Stefan Persson, the largest shareholder in Swedish clothing giant Hennes & Mauritz AB. Bloomberg News unmasked more than 30 hidden billionaires this year. Brazil's Dirce Navarro de Camargo inherited her late husband's industrial conglomerate, Camargo Correa SA, in 1994. Elaine Tettemer Marshall controls 15 percent of Koch Industries Inc., the second-largest closely held company in the U.S. With fortunes of about $12 billion each, both women remain billions shy of Gina Rinehart, the richest woman in the Asia-Pacific region. She's squabbling with her children over the family's $19.1 billion minerals empire. Affiliate Disclosure : It is advisable to assume that any mention of a product or service on this website is made because there exist, unless otherwise stated, a material connection between the product or service owners and this website and should you make a purchase of a product or service described here the owner of this website may be compensated. To learn more please Click Here: Disclosure