Lukas Mühlemann (born 26 May 1950, Zurich, Switzerland) is a Swiss bank manager and business executive.

[1] On 1 September 1994, he took up a position as chief executive officer (CEO) of the Swiss Reinsurance Company in Zurich.

[3] In 2008, the Argentine judiciary issued arrest warrants against Mühlemann, together with the former CEO of JPMorgan Chase, William B. Harrison Jr., and the former chairman of Dresdner bank, Bernd Fahrholz.

The trio had sat on the board of directors of Banco General de Negocios (BGN), closed by the Argentine central bank in early 2002 because of allegations of fraud.

The bank's owners, Jorge and Carlos Rohm, had been arrested and the Argentine judiciary held the directors responsible for the loss of CHF 400 million in investor savings.