A data leak suggests that former energy secretary Amber Rudd was a director of two companies based in the Bahamas before becoming an MP.
Ms Rudd, the UK’s current home secretary, held down posts at Advanced Asset Allocation Fund and Advanced Asset Allocation Management from 1998 to 2000, media reports said.
The information came to light following a leak from the Bahamas of 1.3million documents, the Times reported.
German newspaper Suddeutsche Zeitung shared the data with the International Consortium of Investigative Journalists.
There is no suggestion that Ms Rudd, a former banker, was guilty of any wrongdoing.
It is not yet clear where she invested in those companies or whether either business paid tax in the UK.
“It is a matter of public record that Amber had a career in business before entering politics,” a spokesman for the home secretary was cited as saying by the Times.
In her time as energy secretary, Ms Rudd was criticised for taking more than a year to visit Aberdeen following her appointment.