ITASCA, Ill.—Arthur J. Gallagher & Co. Inc. posted total revenue of $2.13 billion in 2011, a 14.5% increase over a year earlier. Gallagher on Tuesday reported brokerage revenue of $1.56 billion in 2011, a 16.4% increase over the previous year. Brokerage revenue in the fourth quarter of 2011 rose 22.3%…
