Thomas Schmidheiny (born 17 December 1945) is a Swiss billionaire businessman, and the former chairman of cement manufacturer Holcim.

[3] Schmidheiny resigned his chairmanship as part of a deal to settle an investigation of insider trading in Spain.

[5] Since the merger between Holcim and Lafarge Thomas Schmidheiny retains 11.4% of the company Lafarge-Holcim and is the biggest shareholder of the firm.

Schmidheiny holds a doctorate from Tufts University and a bachelor's degree from the ETH Zurich,[2] and an MBA from IMD Business School, Switzerland.

[7] Schmidheiny is married with four children; he owns vineyards and wineries in Argentina, Switzerland and the US (Cuvaison in the Napa Valley[8]), including his residences in Rapperswil-Jona and Klosters.