Leading wealth management player Ask Group has sold 41 per cent stake to Boston-based private equity major Advent International for USD 125 million.<br /> <br /> Founders and other promoters, who include the top management, will retain the remaining 59 per cent in the city-based company, which is the largest in private wealth management firm in the country with an asset under management of close to Rs 30,000 crore, Ask Group managing director Sunil Rohokale said.