Sigfried Meister is the founder of Rational AG and he has an estimated net worth of $4 billion as of April 2016, according to Forbes. He is also the 38th richest person in Germany and is ranked 589th in the World Billionaires list.

Mr. Meister has earned his estimated net worth of $4 billion with Rational AG where he also serves as the Chairman of the Supervisory Board since December 1998. He is a qualified electrical engineer who spent his early years working on management tasks in several large and medium-sized companies with interests in electronics, controller and kitchen technology fields.

In 1973, Siegfried Meister founded Rational. Currently, he owns 63% of the publicly-traded company. His shares have grown over the past year which led to his net worth increasing by several hundred million dollars. The company has a 54% share of the global market for thermal food preparation appliances such as ovens, steamers and grills in professional kitchens. His customers include chefs Gordon Ramsay and Paul Bocuses as well as corporations like KFC and Hilton Hotels.