San Leon has built up a portfolio of assets located in Poland, Morocco, Western Sahara, Albania, Ireland, Spain and Italy.

[citation needed] In September 2008, the company listed on the London Stock Exchange's AIM before embarking on a strategic initiative to develop a portfolio of licences and lease interests through subsidiary operations in several countries.

[3][4] In May 2009, San Leon signed a three-year agreement with the Moroccan Office of Hydrocarbons and Mining for development of the Tarfaya oil shale deposit.

[7] In July 2015, the company announced it had entered into a controversial agreement with the Moroccan government to drill onshore occupied Western Sahara.

[9] The message about the agreement created massive protests, and it is feared that a possible oil find will complicate the work of a peaceful resolution to the conflict.