Gallagher has posted strong earnings for the first quarter, as the US-based broker looks to strengthen its business in key markets including Australia.

The business announced last week it achieved $US599.4 million ($851 million) in adjusted net earnings for the three months to March, up from $US486.5 million ($690.7 million) a year earlier.

Gallagher says the brokerage division increased its adjusted net earnings to $US613.3 million ($870.7 million) from $US453.8 million ($644.2 million) and the Risk Management arm to $US25.6 million ($36.3 million) from $US21.4 million ($30.3 milllion).

“We had a fantastic start to 2022,” Chairman, President and CEO Patrick Gallagher said.

He says the core brokerage and risk management segments combined posted 30% growth in revenue, including more than 10% in organic growth and $US380 million ($539.7 million) of acquired rollover revenues.

“Overall, first quarter rate and exposure increases were broad-based, driven by firm global [property and casualty] rates across nearly all geographies and lines of business, and our clients' continued growth,” Mr Gallagher said.

He says the first quarter’s renewal premium increases of 8% were consistent with fourth quarter levels, adjusting for line of coverage seasonality.

“Looking ahead, we see robust demand for our services continuing as clients look to manage their risk and human capital challenges,” Mr Gallagher said.

“Our team has the expertise, the service capabilities, and the desire to help clients and prospects navigate the current environment.”

Gallagher has upped its presence in Australia in the last few years, acquiring brokerages including Canberra-based Mutual Brokers last year for an undisclosed amount.