Prof. Alexandr S. Holevo has been awarded by IEEE Information Theory Society with the Claude E. Shannon Award for year 2016. Prof. Holevo works at the Stekhlov Mathematical Institute in Moscow (Russia). He is one of pioneers of quantum information theory and has made substantial contribution in the areas of mathematical foundations of quantum theory, quantum statistics and quantum information theory. In 1973 he obtained an upper bound for the amount of classical information which can be extracted from ensemble of quantum states by quantum measurements. This result is known as Holevo's theorem.