Hosszu won the women's 400m IM, the women's 400m freestyle and the women's 100 IM and also finished second in the women's 200m flyweight.
That performance took her earnings for the weekend up to $11,000 and she now has $33,000 in earnings on the season – more than double the next woman on the money list.
Zsuzsanna Jakabos, who beat Hosszu in the women's 200m on Sunday night, won $5,000 over the course of the weekend, and is second on the list with $14,000 while Therese Alshammar comes next having won $13,000 in total ($4,000 in Stockholm).
Daiya Seto tops the men's money list after his $3,500 won in Stockholm moved him on to $14,500.
Australia's Robert Hurley had a second and a third on day two in Sweden to lead all male swimmers at the meet with $4,500.
He is second on the men's money list after having cashed $12,000 this season.