The Nasdaq OMX Group, Inc. announced unaudited consolidated earnings results for the fourth quarter and full year ended December 31, 2014. For the quarter, the company reported revenues less transaction-based expenses of $517 million against $520 million a year ago. Operating income was $173 million against $238 million a year ago. Income before income taxes was $98 million against $235 million a year ago. Net income attributable to the company was $87 million against $141 million a year ago. Diluted earnings per share were $0.50 against $0.81 a year ago. Non-GAAP net income attributable to the company was $129 million against $119 million a year ago. Non-GAAP diluted earnings per common share were $0.75 against $0.69 a year ago. Non-GAAP operating income was $221 million against $207 million a year ago.

For the full year, the company reported revenues less transaction-based expenses of $2,067 million against $1,895 million a year ago. Operating income was $754 million against $688 million a year ago. Income before income taxes was $594 million against $600 million a year ago. Net income attributable to the company was $414 million against $385 million a year ago. Diluted earnings per share were $2.39 against $2.25 a year ago. Non-GAAP net income attributable to the company was $499 million against $445 million a year ago. Non-GAAP diluted earnings per share were $2.88 against $2.60 a year ago. Non-GAAP operating income was $861 million against $773 million a year ago. At December 31, 2014, the company net debt was $1,886 million compared to net debt of $2,236 million at December 31, 2013.

For 2015, the company expects non-GAAP operating expense of $1,120 million to $1,150 million, which excludes amortization of acquired intangibles. Included in this non-GAAP operating expense guidance is an expected $30 million to $40 million in R&D spending.

The company also announced asset impairment charges of $49 million for the fourth quarter of fiscal 2014.