Uliana Nikolayevna Nigmatullina (née Kaisheva, Russian: Ульяна Николаевна Нигматуллина (Кайшева); born 8 March 1994) is a Russian biathlete. She is the only biathlete to win the four gold medals (individual, sprint, pursuit and relay) at the Youth World Championships, in 2013. She competed in the 2018 Winter Olympics.[1]