1999, Mamut was elected to the board of directors of Sobinbank (Russian: Собинбанк). Mamut's "A&NN" Investment Company acquired 100% of shares of Evroset
Тверьуниверсалбанк), Alfa-Bank (Russian: Альфа-банк), Sobinbank [ru] (Russian: Собинбанк), Moscow International Bank (Russian: Московский международный банк) and