R udolf Maag is a self-made Swiss billionaire who has made his fortune in the medical device industry. He is the founder of the dental implant company, Straumann Holding, which has since become a global leader in its field. He later sold his stake in Straumann and has since become a highly successful investor in other medical technology companies.

His most significant and lucrative investment has been his early and major backing of the Swiss medical device firm, Medartis, which specializes in surgical implants for bone fixation. His stake in this company has become the primary source of his current wealth. He is known for his savvy and long-term investment approach in the healthcare sector, and his success has made him one of the wealthiest individuals in Switzerland.