Zuber Issa is looking to sell his 22.5% stake in Asda for more than £500m.
Issa co-owns Asda alongside his brother, Mohsin Issa, and TDR Capital, the private equity firm, after buying the supermarket chain in a debt-fuelled £6.8bn deal three years ago.
It has been reported Issa has approached retailers and private equity firms, as he aims to focus on other areas of his business empire, such as EG Group, the petrol stations business.