Holland picked up their fourth Clydesdale Bank 40 victory of the season after defeating Yorkshire by four wickets in a low-scoring contest in Amstelveen.
Yorkshire were bowled out for a disappointing 123 with only four players reaching double figures, and Holland knocked off their target with more than 12 overs to spare.
The victory lifts Holland onto 10 points in Group A while Yorkshire remain on four points after suffering their sixth defeat in eight outings.
n Somerset maintained their dominant position in Group C with a six-wicket win over Essex at Southend. Spinner Murali Kartik, who opened the bowling, and surprise first-change Arul Suppiah took two wickets apiece as the hosts were restricted to 140 for nine. Kartik was also promoted to number four in the batting order and top-scored with 40 as Somerset chased down the meagre target with more than 10 overs to spare.