Christina Rohde

Christina Rohde is the largest shareholder of German technology company, Rohde & Schwarz.

The business, which has annual revenue of more than 3 billion euros, was founded in 1933 by Lothar Rohde and Hermann Schwarz, and is still controlled by heirs from both families.

The company's first product was a portable crystal clock. It now makes equipment for a range of industries, including air travel, broadcasting and security.

The family-owned company has paid dividends totaling more than 2.3 billion euros to its shareholders since 2006.