Brazilian Billionaire Eike Batista

Brazilian Billionaire Eike Batista

Dado Galdieri/Bloomberg

Eike Batista, founder and chairman of OGX Petroleo e Gas Participacoes SA, who is now worth $4.1 billion, has seen his fortune plummet by more than $30 billion since March 2012 after failing repeatedly to meet the targets he had set for his startup companies.