3. Maria Franca Fissolo – $28.6B:
She is the widow to Michele Ferrero who owned the Ferrero Group, the world’s largest sweets company. The business was founded by her father-in-law during the World War II. Maria’s son, Giovanni, is the current CEO of the Ferrero Group and they are making arrangements to ensure the company remains in the hands of the family. The widow is now 82 years, lives in Italy, and her net worth is $28.6 billion.