Filed Pursuant to Rule 433
Registration No.: 333-142343

Martin Marietta Materials, Inc.

Pricing Term Sheet for Floating Rate Senior Notes

$225,000,000

April 25, 2007

Issuer:		Martin Marietta Materials, Inc.
Principal Amount:		$225,000,000
Security Type:		Floating Rate Senior Note
Maturity:		April 30, 2010
Coupon:		3 Month LIBOR plus .15%
Price to Public:		100%
Interest Payment and Reset Dates:		January 30, April 30, July 30 and October 30, commencing July 30, 2007
Day Count Convention:		Actual/360
Trade Date:		April 25, 2007
Settlement Date:		April 30, 2007 (T+3)
Net Proceeds Before Expenses:		$224,212,500
Denominations:		$2,000 x $1,000
Anticipated Ratings:		Baa1/BBB+
Joint Book-Running Managers:		J.P. Morgan Securities Inc. Banc of America Securities LLC Citigroup Global Markets Inc.
Co-Managers:		Wachovia Capital Markets, LLC BB&T Capital Markets, a division of Scott & Stringfellow, Inc. Wells Fargo Securities, LLC

A rating reflects only the view of a rating agency and is not a recommendation to buy, sell or hold the Notes. Any rating can be revised upward or downward or withdrawn at any time by a rating agency, if it decides that circumstances warrant that change.

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