T heo Müller is a German billionaire who is the sole owner and head of the massive dairy and food conglomerate, Unternehmensgruppe Theo Müller. He represents the third generation of his family's business, which was started by his grandfather as a small village dairy in Bavaria. In the 1970s, Theo took over the small family business and transformed it into a European dairy giant through his entrepreneurial drive and marketing savvy.

His breakthrough came with the creation of the Müller Corner yogurt, which features a separate compartment for fruit or other toppings, a concept that became a massive international success. He has since built a huge and diversified food empire, primarily through a series of major acquisitions of other well-known brands, including the British dairy company Müller Wiseman Dairies. The company is one of the largest privately owned dairy producers in Europe. Müller, who is known for being a tough and demanding leader, has since relocated to Switzerland.