Earnings Per Share of Common Stock

9 Months Ended

Sep. 30, 2011

Set forth below is a reconciliation of the numerator and denominator for basic and diluted earnings per share calculations for the periods indicated:



	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2011			2010			2011			2010
Numerator:
Net income attributable to DuPont	$	452		$	367		$	3,101		$	2,655
Preferred dividends	(3		)	(3		)	(8		)	(8		)
Net income available to DuPont common stockholders	$	449		$	364		$	3,093		$	2,647

Denominator:
Weighted-average number of common shares - Basic	932,356,000			908,366,000			929,369,000			906,991,000
Dilutive effect of the company’s employee compensation plans	11,129,000			10,134,000			13,443,000			7,996,000
Weighted-average number of common shares - Diluted	943,485,000			918,500,000			942,812,000			914,987,000

The following average number of stock options were antidilutive, and therefore, were not included in the diluted earnings per share calculations:



	Three Months Ended		Nine Months Ended
	September 30,		September 30,
	2011	2010	2011	2010
Average number of stock options	8,678,000	47,108,000	2,904,000	56,845,000

The change in the average number of stock options that were antidilutive in the three and nine months ended September 30, 2011 compared to the same periods last year was primarily due to changes in the company’s average stock price.