Sergey Viktorovich Pugachev, also spelled Sergey Pugachyov, (born 4 February 1963 in Kostroma, USSR) is an international investor, public activities, politics, citizen of the French Republic. Doctor of Technical Sciences, full member of the International Engineering Academy. Writer of 3 monographs and 40 research papers.

From 1991 to 1994 resided in USA, from 1994 to the present lives in France. Major projects in the United States, France, Luxembourg, Russia and the United Kingdom.

The billionaire Pugachev is a highly influential figure in Russian politics. From the end of the 80s he took an active business role.

In the 90s, he was a member of the inner circle of the first President of the Russian Federation, Boris Yeltsin, and was one of the leaders of his campaign staff in 1996. Based on these events, in 2003, American director Roger Spottiswoode made a film (Spinning Boris) which included well-known actors such as the: Jeff Goldblum, Anthony LaPaglia, Liev Schreiber, Sean McDonald), the prototype of the hero became S.V. Pugachev, played in the film by Gregory Hlady.