Two years later, Stolk was selected to the Dutch swimming roster at his senior Olympic debut in Rio de Janeiro, competing only in the men's 4×200 m freestyle relay. He swam through the third quarter of the race with a split of 1:47.59 to deliver the Dutch foursome of Dion Dreesens, youngster Maarten Brzoskowski, and anchor Sebastiaan Verschuren a seventh-place time in 7:09.10, holding off the Belgians from the end of the final field by more than two seconds.