Dorothea Steinbruch is a Brazilian widow. Dorothea Steinbruch 2013 net worth. who has a 2013 net worth of $4.5 billion. Dorothea Steinbruch is one of the Brazil's wealthiest women, Dorothea Steinbruch earned her money from her late husband who prohibited one of Brazil's largest steel producer Companhia Siderurgica Nacional CSN. After Dorothea's brother-in-law Eliezer Steinbruch who also had control of CSN died in 2008, Dorothea Steinbruch took over control of the company. Ever since, along with her three children, Dorothea shares control of Brazil's largest steelmakers with $9 billion in revenues and a $15 billion market capitalization. Her son Benjamin Steinbruch has been both a chairman and CEO of the company ever since April 30, 2002. While her other son, Ricardo, is a chairman of the family's other firm, Banco Fibra. which makes them 136 among the richest people in the world. Widowed Dorothea has three children and currently resides in Sao Paolo.