Georg Ehrnrooth owns, with his brothers, investment companies Structor S.A, Corbis S.A. Fennogens Investments S.A. in Luxembourg. These companies are the major owners of EQ Bank, the construction company YIT and the construction and forest industry consulting company Pöyry.
Georg Ehrnrooth and Jorma Ollila were fined for Luxembourg investments in 2014. Georg Ehrnrooth failed to reveal a Luxembourg-based investment company that he controlled, known as Partum. At the end of 2012, Partum was worth 26 million euros but has since been dissolved. Ehrnrooth told regulators that he had neglected to disclose of the investment company to the insider register in error. In 2016 Yle reported that Georg and Henrik Ehrnrooth own a company in Luxemburg that organize Tax haven companies for their customers including Jorma Ollila and Kari Stadigh. Company made years cooperation with Mossack Fonseca in Panama. 
- Ehrnrooth, Casimir (1931 - ) National Bibliography
- Ollila and Ehrnrooth fined for Luxembourg investments, YLE, 26 March 2014
- Ehrnrootheilta paljastui oma veroparatiisitehdas – yhtiöllä ollut tiivis suhde Panaman Mossack Fonsecaan YLE A Studio 27.4.2016