Alexander Semenovich Vinokurov (Russian: Александр Семёнович Винокуров, born 12 October 1982) is a Russian businessman. He is one of the main owners of the privately held investment company Marathon Group and largest shareholder of retailer Magnit.
After graduating from the faculty of economics of the University of Cambridge, Vinokurov began his career in 2004 with the investment banking division of Morgan Stanley (London).