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                      SECURITIES AND EXCHANGE COMMISSION
                            Washington, D.C.  20549

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                                SCHEDULE 13E-4
                              
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                         ISSUER TENDER OFFER STATEMENT
    (Pursuant to Section 13(e)(1) of the Securities Exchange Act of 1934)
                               (AMENDMENT NO. 1)

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                          LOCKHEED MARTIN CORPORATION
                               (Name of Issuer)

                          LOCKHEED MARTIN CORPORATION
                     (Name of Person(s) Filing Statement)

                                 COMMON STOCK
                          par value $1.00 per shares
                        (Title of Class of Securities)

                                  539830 10 9
                     (CUSIP Number of Class of Securities)

                               Stephen M. Piper
                          LOCKHEED MARTIN CORPORATION
                             6801 Rockledge Drive
                           Bethesda, Maryland  20817
                                (301) 897-6000

                                   -Copy to-

                              William J. Phillips
                             Jonathan L. Freedman
                               Dewey Ballantine
                          1301 Avenue of the Americas
                         New York, New York 10019-6092
                                (212) 259-8000

         (Name, Address and Telephone Number of Person Authorized to 
               Receive Notices and Communications on Behalf of 
                          Person(s) Filing Statement)


                              September 16, 1996
                   (Date Tender Offer First Published, Sent
                         or Given to Security Holders)



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     This Amendment No. 1 amends and supplements the Issuer Tender Offer
Statement on Schedule 13E-4, dated September 16, 1996, of Lockheed Martin
Corporation, a Maryland corporation ("Lockheed Martin"), relating to the offer
by Lockheed Martin to exchange 4.72 shares of common stock, par value $.01 per
share ("Materials Common Stock"), of Martin Marietta Materials, Inc., a North
Carolina corporation ("Materials"), of which Lockheed Martin owns approximately
81% of the issued and outstanding shares, for each share of common stock of
Lockheed Martin, par value $1.00 per share ("Lockheed Martin Common Stock"),
upon the terms and subject to the conditions set forth in the Offering 
Circular - Prospectus dated September 16, 1996 (the "Offering Circular -
Prospectus") and the related Letter of Transmittal. Capitalized terms used but
not defined herein have the meaning ascribed to them in the Offering Circular -
Prospectus.

ITEM 9.   MATERIAL TO BE FILED AS EXHIBITS.

          (a) (15)     Press Release dated October 21, 1996.

 
                                   SIGNATURE


     After due inquiry and to the best of my knowledge and belief, I certify 
that the information set forth in this statement is true, complete and correct.


Dated:  October 21, 1996


                                           LOCKHEED MARTIN CORPORATION



                                           By: /s/   Stephen M. Piper
                                              -------------------------
                                              Name:  Stephen M. Piper
                                              Title: Associate General
                                                     Counsel and 
                                                     Assistant Secretary
                                             

 
                                 EXHIBIT INDEX

EXHIBIT NO.                   DESCRIPTION                 PAGE NO.
- -----------                   -----------                 --------

(a)(15)                       Press Release dated            5
                              October 21, 1996

 
                           [LOGO OF LOCKHEED MARTIN]

INFORMATION                                        FOR IMMEDIATE RELEASE
                                                   ---------------------
LOCKHEED MARTIN CORPORATION COMPLETES
MARTIN MARIETTA MATERIALS EXCHANGE OFFER

BETHESDA, Maryland, and RALEIGH, North Carolina, October 21 -- Lockheed Martin
Corporation (NYSE:LMT) and Martin Marietta Materials, Inc. (NYSE:MLM) jointly 
announced today the successful completion of an exchange offer through which 
Lockheed Martin stockholders were given the opportunity to exchange shares of 
Lockheed Martin common stock for Martin Marietta Materials common stock.  The 
exchange offer was oversubscribed and expired at midnight EDT Friday, October 
18.

Based on a preliminary count by the exchange agent, approximately 42,944,000
shares of Lockheed Martin common stock were tendered for exchange, including
approximately 126,000 shares presented by odd-lot stockholders and 15,571,000
shares subject to guarantees of delivery. In accordance with terms of the
exchange offer, Lockheed Martin accepts, subject to the proration provisions and
satisfaction of the remaining conditions of the exchange offer, 7,913,136
Lockheed Martin shares in exchange for the 37,350,000 shares of Martin Marietta
Materials it owns. Lockheed Martin accepts all shares tendered by odd-lot
stockholders. All other shares are subject to exchange on a pro-rata basis. The
preliminary proration factor is approximately 18 percent, assuming all shares
subject to guarantees of delivery are delivered in accordance with the terms of
the exchange offer. The final proration factor will be announced on or about
October 25.

                                    (more)

 
                                      -2-

Certificates for shares of Martin Marietta Materials common stock, checks in 
lieu of fractional shares and Lockheed Martin shares tendered but not accepted 
for exchange will be mailed on or about October 31, as designated by the 
tendering stockholder.

Lockheed Martin commenced the exchange offer on September 16 and offered to 
exchange 4.72 shares of Martin Marietta Materials common stock for each share 
of Lockheed Martin common stock tendered in the exchange offer, up to a maximum
of 7,913,136 Lockheed Martin shares, resulting in approximately 81 percent of 
the Martin Marietta Materials common stock being distributed pursuant to the 
exchange offer.  Previously, in 1994, 19 percent of the Martin Marietta 
Materials common stock was issued through an initial public offering.

Following the exchange, Lockheed Martin will own no shares of Martin Marietta 
materials common stock and will have reduced its own outstanding shares by 
approximately 4 percent, with some 193 million shares of common stock 
outstanding.

Lockheed Martin is a diversified enterprise principally engaged in the research,
development, design, manufacture and integration of advanced-technology products
and services. Lockheed Martin conducts its business through six major sectors:
Aeronautics, C/3/I & Systems Integration, Electronics, Energy & Environment,
Information & Services and Space and Strategic Missiles. Lockheed Martin,
headquartered in Bethesda, employs approximately 190,000 people worldwide and
has annualized sales of nearly $30 billion.

 
                                      -3-

Martin Marietta Materials, with sales of more than $660 million in 1995, is the
second-largest producer in the U.S. of aggregates used for the construction of
highways and other infrastructure projects, and for commercial and residential
construction. Through its Magnesia Specialties division, it also is one of the
nation's leading producers of refractory and lime products for the steel
industry and magnesia-based products for industrial, environmental and
agricultural applications. Headquartered in Raleigh, North Carolina, Martin
Marietta Materials has been a publicly traded company since its initial public
offering in February 1994.

Lockheed Martin made the exchange offer to most efficiently separate Martin
Marietta Materials' aggregates and magnesia specialties operations from Lockheed
Martin's core aerospace and defense businesses in a manner tax free to
stockholders. Morgan Stanley & Co., Inc., acted as dealer manager for the
exchange offer.

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CONTACT:  Charles Manor, Lockheed Martin News & Information, 301/897-6258, or 
Janice Henry, Martin Marietta Materials, 919/781-4550.