Farhad Moshiri has insisted his stake in Everton was bought with his own money after questions were asked about his link to Arsenal investor Alisher Usmanov.
Sunday night's BBC Panorama programme was based on leaked documents known as the Paradise Papers and examined Russian Usmanov's business relationship with Iranian-born Moshiri, the Toffees' biggest shareholder.
The pair jointly held a 30 percent stake in Arsenal before Moshiri sold his shares to Usmanov in February 2016. Moshiri subsequently purchased 49.9 percent of Everton.
Panorama looked at whether an alleged Usmanov gift had financed Moshiri's initial holding in Arsenal, and whether his wealth may have therefore been used to fund the Everton deal.