Raul Jimenez scored the only goal as Wolves ended West Ham's four-game winning run in the Premier League with a deserved victory at Molineux.
Jimenez swept Daniel Podence's low cut-back into the corner from the edge of the box to lift Bruno Lage's side up to sixth in the table.
Wolves dominated proceedings after a slow start and created numerous opportunities to take a first-half lead - the best of which fell to Jimenez, who dragged a tame effort wide with only West Ham goalkeeper Lukasz Fabianski to beat.
Kurt Zouma had the ball in the net for the Hammers, but the centre-back's header was disallowed for a foul on Romain Saiss.
Michail Antonio and Jarrod Bowen blazed over in the second half as the visitors sought a route back into the game, but David Moyes will be bitterly disappointed with his team's below-par performance.
Max Kilman should have doubled Wolves' lead late on but scuffed his shot over the crossbar from Rayan Ait-Nouri's in-swinging free-kick.
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