Marsh & McLennan Companies Inc. reported first-quarter net income of $325 million, a 31 percent increase from $248 million last year. Earnings per share increased 29 percent to 58 cents from 45 cents. Income from continuing operations increased 16 percent to $319 million, or 56 cents per share. “Our performance in the first quarter of 2011 reflects strong revenue growth across all of our operating companies,” Brian Duperreault, president and CEO, said in a release. “Excellent results for Risk and Insurance Services reflect underlying revenue growth at Marsh and Guy Carpenter. Marsh’s revenue growth was across all geographies, driven by continued high levels of new business development and client retention.”