Edelweiss Group, India's leading diversified financial services conglomerate, has announced that US-based Arthur J. Gallagher & Co. (Gallagher) - one of the world's largest insurance brokerage and risk management services firms - has acquired a minority stake by way of primary equity infusion in Edelweiss Insurance Brokers Limited (EIBL). The latter is a subsidiary of Edelweiss Financial Services.