He said that Goldman Sachs is diverting staff from London to rival European cities such as Frankfurt and Munich, noting a significant increase in personnel in Paris.
Mr Solomon said that financial talent is now more mobile and firms like Goldman Sachs are establishing larger offices across various European locations.
He cautioned Chancellor Rachel Reeves against further tax hikes, particularly on the wealthy, suggesting such policies could deter talent and harm the UK economy.
Home Office Minister Seema Malhotra attributed damage to Britain's economic reputation and investor confidence to the premiership of Liz Truss.