Martullo-Blocher is the chief executive officer of Ems-Chemie Holding, a publicly traded specialty chemicals manufacturer. The Herrliberg, Switzerland-based company makes high performance polymers and polyamide materials, and reported revenue of 2.1 billion Swiss francs ($2.4 billion) in 2024.
The majority of Martullo-Blocher's fortune is derived from a 30% stake in Ems-Chemie Holding, a publicly traded manufacturer of chemicals and polymers. The Herrliberg, Switzerland-based company had revenue of 2.1 billion Swiss francs ($2.4 billion) in 2024.
Martullo-Blocher controls the shares with her sister Rahel Blocher through Emesta Holding and Mamira Holding, which each own 30.4% of Ems-Chemie's shares, according to the Ems-Chemie 2024 annual report.
The value of her cash investments is based on an analysis of dividends, insider transactions, taxes, and market performance.
Conrad Gericke, a spokesperson for Ems-Chemie, didn't respond to a request for comment on the net worth calculation.
Magdalena Martullo-Blocher was born to Silvia and Christoph Blocher in Mannedorf, Switzerland on Aug. 13, 1969. She received an MBA from the University of St. Gallen, Switzerland.
She worked as a manager at Johnson & Johnson from 1994 to 1996, before joining Rivella, a Swiss soft drink maker, where she introduced their new Rivella Vert drink. She became a member of the board of directors of Ems-Chemie in 2001.
Martullo-Blocher became chief executive of the group when her father was elected to the Federal Council of the Swiss Government, heading the Federal Justice and Police Department. Christoph Blocher, a retired Air Force Regiment Commander and Colonel, passed his shares onto his four children in 2004.
With her sister Rahel, also a billionaire, Martullo-Blocher owns most of Ems-Chemie. Their siblings Markus and Miriam have sold shares over the years to Magdalena and Rahel.
She lives in Switzerland.