David Sullivan was hit by a coin during fan protests at the London Stadium which occurred as West Ham were defeated by Burnley on Saturday.
Sullivan, the Hammers’ co-chairman, and his partner David Gold, left the match early following a number of pitch invasions.
Police reported after the match there were four separate invasions, while two allegations of assault are also being investigated.
West Ham captain Mark Noble confronted one pitch invader, while Ashley Barnes, the scorer of Burnley’s opening goal, kicked out at another when approached.