Two senior managers have left Troika Dialog after a tumultuous nine months for the Moscow-based financial group in which it was hit by the collapse in Russian stock prices and sold a stake in itself to Standard Bank in March.

The chief executive of Troika Dialog's UK business, Howard Snell, has resigned, while Giedrius Pukas, the managing director of Troika Capital Partners, the group's alternative asset management division, is leaving with a senior team to launch his own firm, according to the bank.