Ekaterina Alekseyevna Semenikhin (Russian: Екатерина Алексеевна Семенихина; born 4 December 1971) is a Russian art collector, philanthropist, economist and honorary consul. Semenikhin is the co-founder of the Ekaterina Cultural Foundation and the Honorary Consul of Russia in the Principality of Monaco. Her father is Alexei Gvishiani, a well-known scientist.