Hammers are outsiders to sign Maddison, Grealish, Carvalho, Seri and Butland
Villa midfielder Jack Grealish has been linked to media reports to West Ham but bookies make him a 20/1 outsider to join the Irons with Spurs the 5/6 odds-on favourites.
Free agent William Carvalho is a 10/1 chance to join the Hammers with Everton the 8/13 odds on Favourites.
Stoke keeper Jack Butland is 12/1 to join West Ham with Liverpool the 5/6 favourites and odds of 8/1 for him to stay at Stoke and 1/20 for him to leave.
James Maddison is a 12/1 chance of joining the Hammers with Leicester City the 4/6 favourites. His odds are 11/2 to stay at Norwich and 1/10 to leave the Norfolk club.
Jean Michael Seri has an outside chance of 33/1 to join West Ham with Napoli in the lead at 10/11. He is 9/4 to stay at Nice and 1/3 to leave this summer.
Of course, Bookies can sometimes get things wrong and these transfer special novelty bets are usually limited to small stakes to avoid inside betting.