Another of Prime Minister Malcolm Turnbull's investments is under scrutiny, with revelations he has a financial stake in the global parent company of the scandal-plagued 7-Eleven empire.



Fairfax Media can reveal Mr Turnbull has shares in two international investment funds that invest in Japanese conglomerate Seven & I Holdings.

Seven & I's major subsidiary is Seven-Eleven Japan, which is the parent company of 7-Eleven in the United States. The US company in turn licences the billionaire Withers and Barlow family, who own Australia's scandal-plagued stores.

As a Senate committee prepares to probe the wages exploitation scandal on Friday, Labor has claimed the investment raises concerns Mr Turnbull must address.

"He has not uttered a single word of support for these workers and people have been legitimately asking why?" said Lisa Chesters, the chair of Labor's Fair Work Caucus Committee.