Charles Koch and his brother David, have been at the centre of political controversy in recent years for using their power to back Republican candidates.   Photograph:  John Chiasson/Liaison

One of the largest privately-owned businesses in the US, Koch Industries, is among the multinationals whose dealings are covered in the latest batch (...)

EU competition commissioner Margrethe Vestager: “We consider the Luxembourg leaks as market information. We will examine it and evaluate whether or not this will lead us to opening new cases.” Photographer: Freya Ingrid Morales/Bloomberg

A new leak of confidential documents expands the list of big companies seeking secret tax deals in Luxembourg, exposing tax-saving manoeuvers by Ameri(...)