EXHIBIT 11.01

MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES

COMPUTATION OF EARNINGS PER SHARE

For the Three and Nine Months Ended September 30, 2005 and 2004
(Dollars in Thousands, Except Per Share Data)

	Three Months Ended
	September 30
	2005		2004
Earnings from continuing operations	$	75,756	$	53,431
Earnings from discontinued operations		604		572
Net earnings	$	76,360	$	54,003
Reconciliation of denominators for basic and diluted earnings per share computations:
Basic weighted average number of common shares		46,349,457		48,216,947
Effect of dilutive employee and director awards		823,372		355,563
Diluted weighted average number of common shares and assumed conversions		47,172,829		48,572,510
Net earnings per common share:
Basic from continuing operations	$	1.64	$	1.11
Discontinued operations		0.01		0.01
	$	1.65	$	1.12
Diluted from continuing operations	$	1.61	$	1.10
Discontinued operations		0.01		0.01
	$	1.62	$	1.11

EXHIBIT 11.01

MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES

COMPUTATION OF EARNINGS PER SHARE

For the Three and Nine Months Ended September 30, 2005 and 2004
(Dollars in Thousands, Except Per Share Data)

	Nine Months Ended
	September 30
	2005			2004
Earnings from continuing operations	$	145,765		$	94,615
Loss on discontinued operations		(856	)		(2,442	)
Net earnings	$	144,909		$	92,173
Reconciliation of denominators for basic and diluted earnings per share computations:
Basic weighted average number of common shares		46,657,630			48,253,154
Effect of dilutive employee and director awards		701,251			390,358
Diluted weighted average number of common shares and assumed conversions		47,358,881			48,643,512
Net earnings (loss) per common share:
Basic from continuing operations	$	3.13		$	1.96
Discontinued operations		(0.02	)		(0.05	)
	$	3.11		$	1.91
Diluted from continuing operations	$	3.08		$	1.94
Discontinued operations		(0.02	)		(0.05	)
	$	3.06		$	1.89