Son's stake would be larger if not for the exclusion of shares held by an entity which, according to filings, Son no longer represents after being replaced by his brother Taizo Son.

SoftBank completed a record $23 billion share buyback programme this month and has retired most of its treasury shares. The stock has lost 20% since hitting two-decade highs in March.

(Reporting by Sam Nussey; Editing by Jan Harvey)