Sweden's main opposition Social Democrats retained its position as the biggest winner in Sunday's European Parliament elections, according to preliminary results, Xinhua reported.
The party garnered 24.5 percent of votes, the same as the previous elections, the Swedish public broadcaster SVT reported.
It was followed by Prime Minister Fredrik Reinfeldt's conservative Moderate Party, which got 18.8 percent of votes.
The other two big winners are the Green Party and the Liberal Party. They won 10.9 percent and 13.6 percent of votes, higher than the 6.0 percent and 9.9 percent they gained in the 2004 European elections. Their seats in the European Parliament will rise to two and three from one and two.
Fielding candidates for the first time, the Pirate Party, which supports shortening the duration of copyright protection and allowing noncommercial sharing of files on the Internet, won 7.1 percent of votes and will occupy one of the 18 Swedish seats in the European Parliament.
The party has been rather popular among the 18-30 age group, and won most of the support from this group in the elections.
The big loser was the June List, an eurosceptic party. The votes it grabbed dropped some 10 percentage points to 3.6 percent, which means it will lose all of its seats in the European Parliament.
The opposition Left Party also saw its support dwindling as its share of the votes has halved to only 5.6 percent.
Sweden will take over the rotating six-month presidency of the European Union from July 1.