Notes to Consolidated Financial Statements

Note 10 Quarterly Financial Data (Unaudited)

Our quarterly financial data for 2009, 2008 and 2007 are summarized below. The variance in our quarterly earnings is the result of the seasonal nature of our primary business.

In millions, except per share amounts	March 31	June 30	Sept. 30	Dec. 31
2009
Operating revenues	$ 995	$ 377	$ 307	$ 638
Operating income	230	55	43	148
Net income attributable to AGL Resources Inc.	119	20	12	71
Basic earnings per common share attributable to AGL Resources Inc. common shareholders	1.55	0.26	0.16	0.92
Diluted earnings per common share attributable to AGL Resources Inc. common shareholders	1.55	0.26	0.16	0.92
2008
Operating revenues	$1,012	$ 444	$ 539	$ 805
Operating income	188	6	126	158
Net income (loss) attributable to AGL Resources Inc.	89	(11)	65	74
Basic earnings (loss) per common share attributable to AGL Resources Inc. common shareholders	1.17	(0.15)	0.85	0.97
Diluted earnings (loss) per share attributable to AGL Resources Inc. common shareholders	1.16	(0.15)	0.85	0.97
2007
Operating revenues	$ 973	$ 467	$ 369	$ 685
Operating income	216	78	55	140
Net income attributable to AGL Resources Inc.	102	30	13	66
Basic earnings per common share attributable to AGL Resources Inc. common shareholders	1.31	0.40	0.17	0.86
Diluted earnings per common share attributable to AGL Resources Inc. common shareholders	1.30	0.40	0.17	0.86

Our basic and diluted earnings per common share are calculated based on the weighted daily average number of common shares and common share equivalents outstanding during the quarter. Those totals differ from the basic and diluted earnings per common share attributable to AGL Resources Inc. common shareholders shown in the consolidated statements of income, which are based on the weighted average number of common shares and common share equivalents outstanding during the entire year.