Exhibit 11.01

MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES

COMPUTATION OF EARNINGS PER SHARE

For the Three Months Ended March 31, 2003 and 2002
(Dollars in Thousands, Except Per Share Data)

		Three Months Ended
		March 31
		2003			2002
					(Restated)
Loss from continuing operations before the cumulative effect of change in accounting principle		$	(13,092	)	$	(7,723	)
Loss on discontinued operations			(926	)		(2,826	)
Cumulative effect of change in accounting for asset retirement obligations			(6,874	)		—
Cumulative effect of change in accounting for intangible assets			—			(11,510	)
Net loss		$	(20,892	)	$	(22,059	)
Weighted average number of common shares outstanding:
	Basic		48,890,996			48,554,631
	Effect of dilutive securities		167,738			163,060
	Diluted		49,058,734			48,717,691
Net loss per common share:
	Basic from continuing operations before cumulative effect of change in accounting principle	$	(0.27	)	$	(0.16	)
	Discontinued operations		(0.02	)		(0.06	)
	Cumulative effect of change in accounting principle		(0.14	)		(0.23	)
		$	(0.43	)	$	(0.45	)
	Diluted from continuing operations before cumulative effect of change in accounting principle	$	(0.27	)	$	(0.16	)
	Discontinued operations		(0.02	)		(0.06	)
	Cumulative effect of change in accounting principle		(0.14	)		(0.23	)
		$	(0.43	)	$	(0.45	)

Page 33 of 35