David Goel, a former protégé of Tiger Management founder Julian Robertson, has decided to close his $11bn hedge fund firm Matrix Capital Management and return client cash, due to personal health issues, according to a report by Bloomberg. Goel launched Matrix Capital Management after spending three years as a technology research analyst at Tiger Management, Robertson’s renowned hedge fund. As the principal owner of Matrix, Goel has had ultimate control over all investment decisions and business operations, according to regulatory filings. Despite maintaining a relatively low profile compared to other so-called “Tiger Cubs” – the group of hedge fund managers who trained under Robertson – Matrix Capital Management has consistently focused on concentrated, technology-driven stock investments. The majority of the firm’s assets are held in its hedge fund, which has largely delivered double-digit returns since its inception.