Sarah Fredrika Sjöström (Swedish: [ˈsɑ̂ːra ˈɧø̂ːstrœm]; born 17 August 1993) is a Swedish competitive swimmer specialising in the sprint freestyle and butterfly events. As of 2024, Sjöström has won a total of 23 individual medals at long course World Championships, more than any other swimmer in history. She is the only female swimmer to win five individual medals at a single FINA World Aquatics Championships, a feat she accomplished in 2019.
https://en.wikipedia.org/wiki/Sarah_Sj%C3%B6str%C3%B6m