AUB Group operates the second-largest general insurance broker network in Australia and New Zealand. AUB brokers derive revenue from commissions paid by insurers, based on gross written premiums, plus fees. AUB owns or has equity stakes in each broking business within the network. Around half of group profit comes from the Australian and New Zealand broker network, around 30% from International, including Tysers in the United Kingdom, and the remainder from underwriting agencies.