Marsh & McLennan Companies Inc. today reported financial results for the fourth quarter and year ended Dec. 31. Consolidated revenue in the fourth quarter of 2013 was $3.1 billion, an increase of 4 percent compared with the fourth quarter of 2012. Operating income was $489 million, compared with $406 million in the prior year period. Net income attributable to the company was $303 million, or 54 cents per share, in the fourth quarter, compared with $259 million, or 47 cents per share, in the prior year. The fourth quarter included a $24 million expense, or 3 cents per share, related to extinguishment of debt. For the full year, revenue was $12.3 billion, an increase of 3 percent. Operating income rose 14 percent to $2.1 billion, compared with $1.8 billion in 2012.