EXHIBIT 11.01

MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES

COMPUTATION OF EARNINGS PER SHARE

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

	Three Months Ended
	June 30
	2005			2004
Earnings from continuing operations	$	61,607		$	44,983
Loss on discontinued operations		(135	)		(268	)
Net earnings	$	61,472		$	44,715
Reconciliation of denominators for basic and diluted earnings per share computations:
Basic weighted average number of common shares		46,569,420			48,210,140
Effect of dilutive employee and director awards		604,226			360,504
Diluted weighted average number of common shares and assumed conversions		47,173,646			48,570,644
Net earnings (loss) per common share:
Basic from continuing operations	$	1.32		$	0.94
Discontinued operations		—			(0.01	)
	$	1.32		$	0.93
Diluted from continuing operations	$	1.30		$	0.93
Discontinued operations		—			(0.01	)
	$	1.30		$	0.92

EXHIBIT 11.01

MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES

COMPUTATION OF EARNINGS PER SHARE

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

	Six Months Ended
	June 30
	2005			2004
Earnings from continuing operations	$	69,906		$	41,089
Loss on discontinued operations		(1,357	)		(2,919	)
Net earnings	$	68,549		$	38,170
Reconciliation of denominators for basic and diluted earnings per share computations:
Basic weighted average number of common shares		46,814,271			48,271,457
Effect of dilutive employee and director awards		640,190			408,142
Diluted weighted average number of common shares and assumed conversions		47,454,461			48,679,599
Net earnings (loss) per common share:
Basic from continuing operations	$	1.49		$	0.85
Discontinued operations		(0.03	)		(0.06	)
	$	1.46		$	0.79
Diluted from continuing operations	$	1.47		$	0.84
Discontinued operations		(0.03	)		(0.06	)
	$	1.44		$	0.78