Arthur J. Gallagher & Co. ( AJG - Free Report ) reported fourth-quarter 2023 adjusted net earnings of $1.85 per share, which beat the Zacks Consensus Estimate by 1.09%. The bottom line increased 24% on a year-over-year basis. Arthur J. Gallagher's performance was driven by higher adjusted revenues and margin expansion across the Brokerage and Risk Management segments, partially offset by higher expenses.