West Ham United co-owner David Sullivan has stepped down from his position as joint chairman and director with immediate effect.
The club said it had “been made aware of the impending publication of serious historic allegations”.
Sullivan has denied any “illegal conduct” and the Hammers say he is leaving “in order to avoid disruption to the club while he addresses the matter privately”.
Sullivan has been the club’s largest single shareholder since the death of his business partner David Gold in January 2023, which left him with a 38.8% stake.
Sullivan and Gold became joint chairmen of West Ham when they completed their takeover of the club in January 2010.
“It is understood none of the allegations relate to West Ham United or any of its operations,” said West Ham.
The club added: “Interim chief executive officer Karim Virani, reporting into the current board of directors, will continue to be responsible for leading the club’s day-to-day operations.
“The club will provide an update on the future structure of the board of directors in due course, but will make no further comment at this time.”
The Hammers were relegated from the Premier League at the end of the 2025-26 season after finishing 18th.
