MARTIN MARIETTA MATERIALS INC
11-KT, 1997-06-27
MINING & QUARRYING OF NONMETALLIC MINERALS (NO FUELS)
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<PAGE>   1

- --------------------------------------------------------------------------------

                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                -----------------

                                    FORM 11-K

                                -----------------


[ ]              ANNUAL REPORT PURSUANT TO SECTION 15(d) OF THE
                SECURITIES EXCHANGE ACT OF 1934 (NO FEE REQUIRED)

                   For the fiscal year ended December 31, 1996

                                       OR

[X]              TRANSITION REPORT PURSUANT TO SECTION 15(d) OF
              THE SECURITIES EXCHANGE ACT OF 1934 (NO FEE REQUIRED)

      For the transition period from October 18, 1996 to December 31, 1996
                                     ----------------    -----------------

                         Commission file number: 1-12744
                                                 -------


                         MARTIN MARIETTA MATERIALS, INC.
                            PERFORMANCE SHARING PLAN
              (Full title of the plan and the address of the plan,
                if different from that of the issuer named below)




                         MARTIN MARIETTA MATERIALS, INC.
                                2710 WYCLIFF ROAD
                          RALEIGH, NORTH CAROLINA 27607
   (Name of issuer of the securities held pursuant to the plan and the address
                       of its principal executive office)




- --------------------------------------------------------------------------------

<PAGE>   2






                          Audited Financial Statements

                         Martin Marietta Materials, Inc.
                            Performance Sharing Plan

                         Martin Marietta Materials, Inc.
                     Defined Contribution Plans Master Trust

                For the Period from October 18, 1996 (inception)
                            through December 31, 1996
                       with Report of Independent Auditors


<PAGE>   3


                         Martin Marietta Materials, Inc.
                            Performance Sharing Plan

                         Martin Marietta Materials, Inc.
                     Defined Contribution Plans Master Trust

                          Audited Financial Statements

   For the Period from October 18, 1996 (inception) through December 31, 1996




                                    CONTENTS

Report of Independent Auditors...............................................1

Audited Financial Statements for the Plan

Statement of Assets Available for Benefits, with Fund Information............2
Statement of Changes in Net Assets Available for Benefits, with
     Fund Information........................................................3
Notes to Financial Statements................................................4



Audited Financial Statements for the Master Trust

Statement of Assets Available for Benefits, with Fund Information............9
Statement of Changes in Net Assets Available for Benefits, with
     Fund Information.......................................................10
Notes to Financial Statements...............................................11

Supplemental Schedules

Schedule of Assets Held for Investment Purposes.............................14
Schedule of Reportable Transactions.........................................15



<PAGE>   4




                         Report of Independent Auditors


Martin Marietta Materials, Inc., as Plan Administrator

We have audited the accompanying statements of net assets available for benefits
of the Martin Marietta Materials, Inc. Performance Sharing Plan (the "Plan") and
the Martin Marietta Materials, Inc. Defined Contribution Plans Master Trust (the
"Master Trust") as of December 31, 1996, and the related statements of changes
in net assets available for benefits for the period from October 18, 1996
(inception) to December 31, 1996. These financial statements are the
responsibility of Martin Marietta Materials, Inc., as Plan Administrator. Our
responsibility is to express an opinion on these financial statements based on
our audits.

We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement. An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements. An audit also includes
assessing the accounting principles used and significant estimates made by
management, as well as evaluating the overall financial statement presentation.
We believe that our audits provide a reasonable basis for our opinion.

In our opinion, the financial statements referred to above present fairly, in
all material respects, the financial status of the Plan and the Master Trust at
December 31, 1996, and the changes in the financial status of the Plan and the
Master Trust for the period from October 18, 1996 (inception) to December 31,
1996, in conformity with generally accepted accounting principles.

Our audits were performed for the purpose of forming an opinion on the financial
statements taken as a whole. The Fund Information in the statements of net
assets available for benefits and the statements of changes in net assets
available for benefits is presented for purposes of additional analysis rather
than to present the net assets available for benefits and changes in net assets
available for benefits of each fund. The Fund Information has been subjected to
the auditing procedures applied in our audits of the financial statements and,
in our opinion, are fairly stated in all material respects in relation to the
financial statements taken as a whole.


                                                        ERNST & YOUNG LLP


June 9, 1997
Raleigh, North Carolina

<PAGE>   5




                         Martin Marietta Materials, Inc.
                            Performance Sharing Plan

      Statement of Net Assets Available for Benefits, with Fund Information

                                December 31, 1996
                                 (In Thousands)


<TABLE>
<CAPTION>
                                                   MARTIN
                                                  MARIETTA    LOCKHEED
                       YIELD-ENHANCED     S&P     MATERIALS    MARTIN        HARBOR                   
                         SHORT-TERM       500      COMMON      COMMON        CAPITAL                    
                         INVESTMENT      INDEX      STOCK       STOCK      APPRECIATION   INTERMEDIATE  
                           FUND           FUND      FUND        FUND           FUND         BOND FUND   
                      -------------------------------------------------------------------------------
<S>                      <C>            <C>        <C>         <C>           <C>          <C>         
     ASSETS
     Interest in
       Master Trust      $20,221        $16,576    $2,020      $20,690       $ 1,471      $ 1,024     
                      ================================================================================

     Net assets
      available for
      benefits           $20,221        $16,576    $2,020      $20,690       $ 1,471      $ 1,024     
                      ================================================================================
</TABLE>

<TABLE>
<CAPTION>

                       INVESTMENT                 DAILY                  VANGUARD
                      COMPANY OF    AMERICAN      BOND      VANGUARD   INTERNATIONAL
                        AMERICA     BALANCED     MARKET     WINDSOR       GROWTH         LOAN 
                          FUND        FUND        FUND       FUND          FUND          FUND       TOTAL
                     ---------------------------------------------------------------------------------------

<S>                      <C>         <C>          <C>        <C>          <C>            <C>        <C>    
     ASSETS
     Interest in
       Master Trust      $1,190      $ 510        $ 645      $2,620       $1,231         $1,241     $69,439
                      ======================================================================================

     Net assets
      available for
      benefits           $1,190      $ 510        $ 645      $2,620       $1,231         $1,241     $69,439
                      =====================================================================================
</TABLE>


                                                                               2

See accompanying notes.


<PAGE>   6


                         Martin Marietta Materials, Inc.
                            Performance Sharing Plan

           Statement of Changes in Net Assets Available for Benefits,
                              with Fund Information

   For the Period from October 18, 1996 (inception) through December 31, 1996
                                 (In Thousands)

<TABLE>
<CAPTION>
                                                                      MARTIN
                                                                     MARIETTA       LOCKHEED
                                     YIELD-ENHANCED      S&P         MATERIALS        MARTIN        HARBOR                   
                                       SHORT-TERM        500          COMMON         COMMON        CAPITAL                    
                                       INVESTMENT       INDEX          STOCK          STOCK      APPRECIATION   INTERMEDIATE  
                                         FUND            FUND          FUND           FUND           FUND         BOND FUND   
                                     ----------------------------------------------------------------------------------------

<S>                                   <C>             <C>             <C>            <C>             <C>          <C>    
Net assets available for
 benefits at beginning of period      $   --          $   --          $  --          $   --          $ --         $ --   

Additions to net assets:
  Contributions:
     Employees                             418             230             16            --              26           18
     Martin Marietta Materials             200              42              4            --               6            3
     Rollover contributions               --              --                1            --               2         --   
                                     ----------------------------------------------------------------------------------------
  Total contributions                      618             272             21            --              34           21

  Interest in net investment
   gain (loss) of Master Trust             182             887            (31)            521            42            6
                                     ----------------------------------------------------------------------------------------
Total additions (reductions)               800           1,159            (10)            521            76           27

Deductions from net assets:
   Distributions and withdrawals           629             267             19             367          --           --   

   Administrative expenses                   7               5              1               5             1            1
                                     ----------------------------------------------------------------------------------------
Total deductions                           636             272             20             372             1            1

Net transfers from other plans          20,193          16,160          1,898          20,838           937          928

Net transfers between funds               (136)           (471)           152            (297)          459           70
                                     ----------------------------------------------------------------------------------------
Net assets available for
   benefits at end of year            $ 20,221        $ 16,576        $ 2,020        $ 20,690        $1,471       $1,024
                                     ========================================================================================
</TABLE>




<TABLE>
<CAPTION>

                                      INVESTMENT                 DAILY                  VANGUARD
                                     COMPANY OF    AMERICAN      BOND      VANGUARD   INTERNATIONAL
                                       AMERICA     BALANCED     MARKET     WINDSOR       GROWTH         LOAN 
                                         FUND        FUND        FUND       FUND          FUND          FUND       TOTAL
                                    ---------------------------------------------------------------------------------------
<S>                                    <C>           <C>        <C>           <C>        <C>          <C>          <C>  
Net assets available for
 benefits at beginning of period       $ --          $--        $--           $--        $ --         $ --         $  --

Additions to net assets:
  Contributions:
     Employees                             22          9         13            57            19         --             828
     Martin Marietta Materials              5          2          4            14             4         --             284
     Rollover contributions              --          --         --           --               2         --               5
                                    ---------------------------------------------------------------------------------------
  Total contributions                      27         11         17            71            25         --           1,117

  Interest in net investment
   gain (loss) of Master Trust             52         14          5           163            64            8         1,913
                                    ---------------------------------------------------------------------------------------
Total additions (reductions)               79         25         22           234            89            8         3,030

Deductions from net assets:
   Distributions and withdrawals         --          --         --              1          --             24         1,307

   Administrative expenses                  1        --           1             1             1         --              24
                                    ---------------------------------------------------------------------------------------
Total deductions                            1        --           1             2             1           24         1,331

Net transfers from other plans            958        441        607         2,443         1,083        1,254        67,740

Net transfers between funds               154         44         17           (55)           60            3          --
                                    ---------------------------------------------------------------------------------------
Net assets available for
   benefits at end of year             $1,190       $510       $645       $ 2,620        $1,231       $1,241       $69,439
                                    =========================================================================================

</TABLE>
See accompanying notes.


                                                                               3

<PAGE>   7




                         Martin Marietta Materials, Inc.
                            Performance Sharing Plan

                          Notes to Financial Statements

                                December 31, 1996


1. ACCOUNTING POLICIES

The financial statements of the Martin Marietta Materials, Inc. Performance
Sharing Plan (the "Plan") are prepared on the accrual basis of accounting. No
liability is recorded for distributions to participants who terminated during
the year but have chosen to defer payments to the following year. The assets of
the plan are held and invested on a commingled basis in the Martin Marietta
Materials, Inc. Defined Contribution Plans Master Trust (the "Master Trust")
along with the assets of the Martin Marietta Materials, Inc. Savings and
Investment Plan for Hourly Employees and the Martin Marietta Materials, Inc.
Money Accumulation Plan for Hourly Employees. The Plan's interest in the Master
Trust is stated at the fair value of the underlying net assets in the Master
Trust. Unrealized appreciation or depreciation in the aggregate and the gain or
loss on disposition of investments during the year are determined using the
average cost of investments. The assets, realized and unrealized gains and
losses and investment income of the Master Trust are allocated among the
participating plans on a pro rata basis. All administrative expenses, a portion
of which are paid by Martin Marietta Materials, Inc. (the "Corporation"), are
otherwise paid from the Master Trust and allocated to each of the participating
plans.

Prior to October 1996, the Plan was not part of the Master Trust. Rather, the
Plan's assets were invested in a master trust arrangement established for
various plans affiliated with Lockheed Martin Corporation, the former parent of
the Corporation. During October 1996, the Plan's assets were transferred
directly from the master trust arrangement affiliated with Lockheed Martin
Corporation into the Master Trust established for the plans sponsored by the
Corporation and for certain other employees of members of the Corporation's
controlled group of companies, as defined by Section 1563(a)(1) of the Internal
Revenue Code ("IRC Section 1563(a)(1)").

The preparation of financial statements in conformity with generally accepted
accounting principles requires management to make estimates and assumptions, in
particular the determination of fair values of investments for which market
values are not readily available. Actual results could differ from those
estimates.

                                                                               4

<PAGE>   8


                         Martin Marietta Materials, Inc.
                            Performance Sharing Plan

                    Notes to Financial Statements (continued)


2. DESCRIPTION OF THE PLAN

In October 1996, Lockheed Martin Corporation disposed of its remaining ownership
interest of the Corporation's common stock by means of a split-off, an exchange
offer whereby Lockheed Martin Corporation's shareholders were given the
opportunity to exchange some or all of their common stock of Lockheed Martin
Corporation for shares of the Corporation's common stock. The Corporation
subsequently registered its common stock for use in connection with the Plan.

In connection with the divestiture of Lockheed Martin Corporation's ownership
interest in the Corporation, the Plan was established effective October 18,
1996, as a defined contribution plan providing eligible salaried employees an
opportunity to participate in an individual savings and investment program
providing tax savings and retirement incentives. Martin Marietta Materials,
Inc., is the Plan's sponsor, and also serves as the Plan administrator. Prior to
October 1996, eligible employees participated in the Lockheed Martin Corporation
Performance Sharing Plan, which was sponsored by Lockheed Martin Corporation.
Employees of the Corporation and certain employees of members of the Lockheed
Martin Corporation controlled group of companies, as defined by IRC Section
1563(a)(1), were eligible to participate in the Plan.

Generally, the terms of - as well as the procedures for administering - the new
Plan did not change. However, certain investment option funds available under
the former plan were replaced with similar funds of the same type of risk and
level of return. The risk and return investment objectives for the new funds in
the Plan are similar to the investment objectives that existed in the former
plan. Additionally, the underlying investment option available in the employer's
company common stock fund was changed from Lockheed Martin Corporation common
stock to that of Martin Marietta Materials, Inc. Following the consummation date
of the split-off, Plan participants are no longer able to make any
participant-directed contributions into the Lockheed Martin Common Stock Fund
nor add to an existing balance in a Lockheed Martin Common Stock Fund by
purchasing additional shares of the underlying common stock. For the period
through October 1998, Plan participants may transfer out any balance in the
Lockheed Martin Common Stock Fund and any such balance is available for
withdrawals, as permitted under the Plan. At the end of this period,
participation in the Lockheed Martin Common Stock Fund will be terminated and
any participants' remaining balances will be liquidated and reinvested
automatically in the Yield-Enhanced Short-Term Investment Fund. No other
significant plan changes were made as a result of the split-off transaction.



                                                                               5
<PAGE>   9


                         Martin Marietta Materials, Inc.
                            Performance Sharing Plan

                    Notes to Financial Statements (continued)


2. DESCRIPTION OF THE PLAN (CONTINUED)

Employees are eligible to enroll in the Plan after six months of service.
Employee participation requires employee basic contributions of 1% to 6% of base
salary (as defined in the Plan and subject to applicable Internal Revenue Code
("IRC") limitations on allowable compensation). For participants with at least
three years of service on January 1 of each applicable Plan year, the maximum
percentage of employee basic contributions may be increased to 7% of base
salary. Participants may also elect to make additional supplemental
contributions which are not considered for purposes of computing the employer
match. A participant's combined basic and supplemental contributions may not
exceed 17% of that participant's base pay. Generally, a participant's before-tax
contributions may not exceed 15% of base pay, subject to certain restrictions
for highly compensated employees, as defined.

The Company matches the participants' annual basic contribution (the first 6% or
7% of base pay, depending upon length of service). The amount of the Company's
match is equal to 50% of the basic contributions and is credited to participant
accounts monthly. All participants are 100% vested in the value of their
accounts, including employer contributions.

Participants may change the overall percentage of their contributions in 1%
increments and may change investment elections for future before-tax, after-tax
and matching contributions, both up to once per month. Any changes in investment
elections must be made in 5% increments. In addition, participants may change
the investment mix of the accumulated value of prior contributions among the
investment options - excluding the Lockheed Martin Common Stock Fund - daily,
but are limited to 12 changes in a calendar year, however not less than one
transfer in a calendar quarter. The Plan provides for participants to borrow
from the money in his or her own investment account. All loans must meet
specific terms and conditions of the Plan and are subject to applicable IRC
regulations. Personal loans are available to participants in terms of up to 4
1/2 years, and primary residence loans are available for terms of up to 15
years. Such loans bear interest at a fixed rate, established upon loan request,
which is equal to the annual prime rate (based upon corporate borrowing rates
posted by at least 75% of the nation's 30 largest banks, as reported in The Wall
Street Journal on the first business day of the calendar month before loan
application) plus 1%. All loans are due in full immediately upon termination of
employment. Approximately $63,000 was loaned to participants for the period from
October 18, 1996 (inception), through December 31, 1996. Outstanding loan
balances and loan-related activities are reflected in the Loan Fund account in
the accompanying financial statements. In addition, the plan provides


                                                                               6

<PAGE>   10


                         Martin Marietta Materials, Inc.
                            Performance Sharing Plan

                    Notes to Financial Statements (continued)


2. DESCRIPTION OF THE PLAN (CONTINUED)

for in-service withdrawals to participants that meet specific conditions of
financial hardship, as defined in the Plan and in accordance with current
specific regulations under the IRC. Participants who are still working at the
age of 59 1/2 may qualify for special withdrawal rights and privileges as
defined in the Plan.

Upon separation from the Corporation, participants may receive the full current
value of their contributions and the matching employer contributions.
Participants who have attained age 55 may receive their distributions in the
form of a lump-sum payment or in annual installments over a period of up to 25
years. The accounts of participants who receive installment payments remain
invested in the funds indicated by the participant.

During 1996, the Plan received $67,740,000 from the Lockheed Martin Corporation
Performance Sharing Plan. This amount represents the transfer of account
balances of eligible participants pursuant to the establishment of the Plan.

State Street Bank and Trust Company is the trustee of the Master Trust and
record keeper of the Master Trust and Plan.

Although the Corporation expects to continue the Plan indefinitely, the Board of
Directors of the Corporation may terminate the Plan for any reason at any time.
If the Plan is terminated, each participant or former participant shall receive
a payment equal to the value of the participant's account.

3. INCOME TAX STATUS

The Plan is in the process of applying for a determination letter from the
Internal Revenue Service. Management believes that the Plan meets the
qualification requirements under the IRC Section 401(a) for tax-exempt status.
Therefore, no provision has been made in the financial statements for income
taxes.




                                                                               7

<PAGE>   11


                         Martin Marietta Materials, Inc.
                            Performance Sharing Plan

                   Notes to Financial Statements (continued)


4. MASTER TRUST

The Plan's interest in the Master Trust's net assets as of December 31, 1996,
was 87.21%. The Plan's interest in the Master Trust did not fluctuate
significantly throughout the period from October 18, 1996 (inception) through
December 31, 1996. The following audited financial statements of the Master
Trust contain additional information concerning the Plan's interest in the
Master Trust.


                                                                               8

<PAGE>   12

                         Martin Marietta Materials, Inc.
                     Defined Contribution Plans Master Trust
      Statement of Net Assets Available for Benefits, with Fund Information
                                December 31, 1996
                                 (In Thousands)

<TABLE>
<CAPTION>
                                                                           MARTIN
                                                                          MARIETTA    LOCKHEED
                                               YIELD-ENHANCED     S&P     MATERIALS     MARTIN        HARBOR                   
                                                 SHORT-TERM       500      COMMON      COMMON        CAPITAL                    
                                                 INVESTMENT      INDEX      STOCK       STOCK      APPRECIATION   INTERMEDIATE  
                                                   FUND           FUND      FUND        FUND           FUND         BOND FUND   
                                               -------------------------------------------------------------------------------
<S>                                            <C>              <C>        <C>        <C>           <C>            <C>
ASSETS                                            
Investments at quoted fair value:
  Cash and cash equivalents                       $25,520       $    --    $   52     $ 1,282         $   --         $   --
  Governmental bonds                                   --            --        --          --             --            349
  Corporate bonds                                      --            --        --          --             --            669
  Common stocks                                        --        17,972     2,056      22,273          1,470             --
                                               -------------------------------------------------------------------------------
Total investments at quoted fair value             25,520        17,972     2,108      23,555          1,470          1,018

Investments at estimated fair value:
  Participant loans                                    --            --        --          --             --             --
                                               -------------------------------------------------------------------------------
Total investments at estimated fair value              --            --        --          --             --             --

Other assets:
  Contributions receivable:
   Employees                                          229           101         6          --              7              7
   Martin Marietta Materials, Inc.                     73            15         1          --              2              1
  Dividends and interest receivable                   117            --        --           6             --             --
  Receivable for investments sold                      --            --        35          --             --             --
  Other                                                --            --        --          --             --             --
                                               -------------------------------------------------------------------------------
Total other assets                                    419           116        42           6              9              8
                                               -------------------------------------------------------------------------------
Total assets                                       25,939        18,088     2,150      23,561          1,479          1,026

LIABILITIES
Administrative expenses payable                         8             6         1           6              1              1
Amounts payable for investments purchased             117            --        --          --             --             --
Other                                                  --            --        --          --             --             --
                                               -------------------------------------------------------------------------------
Total liabilities                                     125             6         1           6              1             --
                                               -------------------------------------------------------------------------------
Net assets available for benefits                 $25,814       $18,082    $2,149     $23,555         $1,478         $1,025
                                               ===============================================================================
</TABLE>


<TABLE>
<CAPTION>
                                             
                                             
                                             INVESTMENT                  DAILY                  VANGUARD
                                             COMPANY OF    AMERICAN      BOND      VANGUARD   INTERNATIONAL
                                               AMERICA     BALANCED     MARKET     WINDSOR       GROWTH          LOAN 
                                                 FUND        FUND        FUND       FUND         FUND            FUND        TOTAL
                                             ---------------------------------------------------------------------------------------
<S>                                          <C>           <C>          <C>        <C>         <C>             <C>          <C>
ASSETS
Investments at quoted fair value:
  Cash and cash equivalents                    $   --       $ 65        $ --       $   --       $   --         $   --       $26,919
  Governmental bonds                               --        120         320           --           --             --           789
  Corporate bonds                                  --         71         321           --           --             --         1,061
  Common stocks                                 1,192        288          --        2,616        1,241             --        49,108
                                             ---------------------------------------------------------------------------------------
Total investments at quoted fair value          1,192        544         641        2,616        1,241             --        77,877

Investments at estimated fair value:
  Participant loans                                --         --          --           --           --          1,241         1,241
                                             ---------------------------------------------------------------------------------------
Total investments at estimated fair value          --         --          --           --           --          1,241         1,241

Other assets:
  Contributions receivable:
   Employees                                        7          3           4           19            6             --           389
   Martin Marietta Materials, Inc.                  1          1           1            5            3             --           103
  Dividends and interest receivable                --         --          --           --           --             --           123
  Receivable for investments sold                  --         --          --           --           --             --            35
  Other                                            --         --          --           --           --             --            --
                                             ---------------------------------------------------------------------------------------
Total other assets                                  8          4           5           24            9             --           650
                                             ---------------------------------------------------------------------------------------
Total assets                                    1,200        548         646        2,640        1,250          1,241        79,768

LIABILITIES
Administrative expenses payable                     1          1           1            1            1             --            28
Amounts payable for investments purchased          --         --          --           --           --             --           117
Other                                              --         --          --           --           --             --            --
                                             ---------------------------------------------------------------------------------------
Total liabilities                                   1          1           1            1            1             --           145
                                             ---------------------------------------------------------------------------------------
Net assets available for benefits              $1,199       $547        $645       $2,639       $1,249         $1,241       $79,623
                                             =======================================================================================
</TABLE>

See accompanying notes.

                                                                               9

<PAGE>   13

                         Martin Marietta Materials, Inc.
                     Defined Contribution Plans Master Trust
Statement of Changes in Net Assets Available for Benefits, with Fund Information
   For the Period from October 18, 1996 (inception) through December 31, 1996
                                 (In Thousands)



<TABLE>
<CAPTION>
                                                                         MARTIN
                                                                        MARIETTA       LOCKHEED
                                       YIELD-ENHANCED       S&P         MATERIALS       MARTIN        HARBOR                    
                                         SHORT-TERM         500          COMMON         COMMON        CAPITAL                     
                                         INVESTMENT        INDEX          STOCK          STOCK      APPRECIATION   INTERMEDIATE   
                                           FUND             FUND          FUND           FUND           FUND         BOND FUND    
                                         -------------------------------------------------------------------------------------------

<S>                                      <C>             <C>             <C>            <C>             <C>            <C>    
Net assets available for benefits
  at beginning of period:                $   --          $   --          $  --          $   --          $  --          $ --   
   Additions to net assets:
     Contributions:
      Employees                               746             326             18            --               26            19
      Employer                                233              47              4            --                6             3
      Rollover contributions                 --              --                1            --                2          --   
                                         -------------------------------------------------------------------------------------------
Total contributions                           979             373             23            --               34            22

Investment income:
  Dividends and interest                      230            --               11             108             45          --   
  Net realized and unrealized gain           --               961            (44)            485             (3)            6
    (loss)
                                         -------------------------------------------------------------------------------------------
Total investment income                       230             961            (33)            593             42             6
                                         -------------------------------------------------------------------------------------------
Total additions                             1,209           1,334            (10)            593             76            28

Deductions from net assets:
  Distributions and withdrawals               693             286             20             411           --            --   
  Administrative expenses                       8               6              1               6              1             1
                                         -------------------------------------------------------------------------------------------
Total deductions                              701             292             21             417              1             1
Net transfers from other plans             25,442          17,511          2,009          23,694            939           928
Net transfers between funds                  (136)           (471)           171            (315)           464            70
                                         -------------------------------------------------------------------------------------------
Net assets available for benefits
  at end of year                         $ 25,814        $ 18,082        $ 2,149        $ 23,555        $ 1,478        $1,025
                                         ===========================================================================================
</TABLE>


<TABLE>
<CAPTION>
                                      
                                      
                                          INVESTMENT               DAILY                   VANGUARD
                                         COMPANY OF   AMERICAN     BOND       VANGUARD   INTERNATIONAL
                                           AMERICA    BALANCED    MARKET      WINDSOR       GROWTH         LOAN 
                                             FUND       FUND       FUND        FUND          FUND          FUND         TOTAL
                                         -------------------------------------------------------------------------------------------

<S>                                      <C>          <C>          <C>        <C>            <C>          <C>          <C>  
Net assets available for benefits
  at beginning of period:                $ --         $--          $--        $  --          $ --         $ --         $  --
   Additions to net assets:
     Contributions:
      Employees                              22          11          13            58            20         --           1,259
      Employer                                6           2           3            15             5         --             324
      Rollover contributions               --          --           --           --               2         --               5
                                         -------------------------------------------------------------------------------------------
Total contributions                          28          13          16            73            27         --           1,588

Investment income:
  Dividends and interest                     52          31         --            225            51            8           761
  Net realized and unrealized gain         --           (16)          5           (60)           14         --           1,348
    (loss)
                                         -------------------------------------------------------------------------------------------
Total investment income                      52          15           5           165            65            8         2,109
                                         -------------------------------------------------------------------------------------------
Total additions                              80          28          21           238            92            8         3,697

Deductions from net assets:
  Distributions and withdrawals            --          --             1             1          --             24         1,436
  Administrative expenses                     1           1           1             1             1         --              28
                                         -------------------------------------------------------------------------------------------
Total deductions                              1           1           2             2             1           24         1,464
Net transfers from other plans              966         476         608         2,461         1,102        1,254        77,390
Net transfers between funds                 154          44          18           (58)           56            3          --
                                         -------------------------------------------------------------------------------------------
Net assets available for benefits
  at end of year                         $1,199       $ 547        $645       $ 2,639        $1,249       $1,241       $79,623
                                         ===========================================================================================
</TABLE>

See accompanying notes.


                                                                              10

<PAGE>   14





                         Martin Marietta Materials, Inc.
                     Defined Contribution Plans Master Trust

                          Notes to Financial Statements

                                December 31, 1996


1. ACCOUNTING POLICIES

The Martin Marietta Materials, Inc. Defined Contribution Plans Master Trust (the
"Master Trust") was created on October 18, 1996, to hold the assets of the
Martin Marietta Materials, Inc. Performance Sharing Plan, the Martin Marietta
Materials, Inc. Savings and Investment Plan for Hourly Employees and the Martin
Marietta Money Accumulation Plan for Hourly Employees (collectively, the
"Plans") on a commingled basis. All plans are defined contribution plans of
Martin Marietta Materials, Inc. (the "Corporation"). State Street Bank and Trust
Company ("State Street") is the trustee and recordkeeper for the Master Trust.
Each plan owns the following share of the entire Master Trust.

<TABLE>
<CAPTION>
                                                                                       
                                                                                         INTEREST IN  
                                                                                       MASTER TRUST AS
                                                                        PLAN           OF DECEMBER 31,
Name of Plan                                                           NUMBER               1996
                                                                 -------------------------------------------

<S>                                                                     <C>                 <C>
Martin Marietta Materials, Inc. Performance Sharing Plan
EIN #56-1848578                                                         005                  87.21%

Martin Marietta Materials, Inc. Savings and Investment Plan for
   Hourly Employees
EIN #56-1848578                                                         006                  10.45%

Martin Marietta Money Accumulation Plan for Hourly Employees
EIN #56-1848578                                                         007                   2.34%
                                                                                    ------------------------
                                                                                            100.00%
                                                                                    ========================
</TABLE>

The preparation of financial statements in conformity with generally accepted
accounting principles requires management to make estimates and assumptions, in
particular the determination of fair values of investments for which market
values are not readily available. Actual results could differ from those
estimates.

                                                                            11
<PAGE>   15


                         Martin Marietta Materials, Inc.
                     Defined Contribution Plans Master Trust

                    Notes to Financial Statements (continued)



2. DESCRIPTION OF TRUST

Plan assets held by the Master Trust are invested in eleven funds. The
Yield-Enhanced Short-Term Investment Fund, which is managed by the trustee, is
invested in high-quality money market instruments, corporate equity and debt
instruments and U.S. Government secured notes and bonds. The S&P 500 Index Fund,
which is managed by the trustee, invests in the same individual common stocks in
identical proportions to the S&P 500 index. The Martin Marietta Materials Common
Stock Fund is composed of the Corporation's common stock. The Lockheed Martin
Common Stock Fund is composed of the common stock of Lockheed Martin
Corporation. The Harbor Capital Appreciation Fund is designed to seek long-term
growth of capital by investing in stocks of domestic and foreign companies with
high equity capitalization with above average prospects for growth. The
Intermediate Bond Fund, which is managed by the trustee, invests primarily in
U.S. Treasury, Agency, corporate and asset backed bonds. The Investment Company
of America Fund is designed to achieve long-term growth of capital and income by
investing in stocks of well-established "blue-chip" companies of both the U.S.
and abroad, as well as, in U.S. Government securities. The American Balanced
Fund is designed to seek conservation of capital, current income and long-term
growth of capital by investing in a blend of stocks, bonds and other fixed
income securities. The Daily Bond Market Fund, which is managed by the trustee,
invests primarily in U.S. Treasury, Agency, corporate, mortgage backed and asset
backed securities. The Vanguard Windsor Fund is a capital growth and income fund
that will invest primarily in a diversified portfolio of U.S. common stocks
thought to be undervalued. The Vanguard International Growth Fund is designed to
achieve long-term growth of capital by investing in equity securities of
non-U.S. Companies.

The Martin Marietta Materials, Inc. Performance Sharing Plan has a loan program
whereby eligible participants may borrow up to the lesser of 50% of their total
account balance less the highest outstanding loan balance from the past twelve
months, or $50,000 with a minimum loan of $500. Loans are repaid monthly over a
term of up to 4 1/2 years for personal loans and up to 15 years for a
residential loan at an interest rate of one percent over the prime rate reported
by at least 75% of the nation's 30 largest banks as reported in The Wall Street
Journal on the first business day of the month before loan application. All
loans are due in full immediately upon termination of employment. Approximately
$1,241,000 was loaned to participants at December 31, 1996. Participant loan
activity and the net outstanding loan balances are reflected in the Loan Fund in
the accompanying financial statements.


                                                                              12

<PAGE>   16


                         Martin Marietta Materials, Inc.
                     Defined Contribution Plans Master Trust

                    Notes to Financial Statements (continued)


2. DESCRIPTION OF TRUST (CONTINUED)

Fair values of the underlying securities in the Yield-Enhanced Short-Term
Investment Fund, the S&P 500 Index Fund, the Intermediate Bond Fund, and the
Daily Bond Market Fund are determined by closing prices on the last business day
of the year for those securities traded on national exchanges, at the most
recent sales prices for those securities traded in over-the-counter markets and
at fair value as determined by the Trustee for securities for which there is not
an established market. The fair value of Martin Marietta Materials common stock
and Lockheed Martin Corporation common stock is determined by the closing price
per share on the last business day of the year as reported for New York Stock
Exchange Composite Transactions. Fair values of the Harbor Capital Appreciation
Fund, the Investment Company of America Fund, the American Balanced Fund, the
Vanguard Windsor Fund, and the Vanguard International Growth Fund are determined
by the closing prices on the last business day of the year.

Administrative expenses, a portion of which are paid by the Corporation, are
otherwise paid from the Trust and allocated to the Plans on a pro rata basis.

3. INVESTMENTS

The fair values of individual investments that represent 5% or more of the
Master Trust's net assets at December 31, 1996, are as follows:

                                                               (In Thousands)
         Yield-Enhanced Short-Term Investment Fund                 $25,520
         S&P 500 Index Fund                                        $17,972
         Lockheed Martin Common Stock Fund                         $23,555

4. INCOME TAXES

The Master Trust has not received a tax ruling from the Internal Revenue
Service. It is management's opinion that the Master Trust Arrangement is
qualified under Section 401(a) of the Internal Revenue Code.


                                                                              13

<PAGE>   17


                         Martin Marietta Materials, Inc.
                     Defined Contribution Plans Master Trust

            Line 27a-Schedule of Assets Held for Investment Purposes

                                December 31, 1996



<TABLE>
<CAPTION>
                                                            DESCRIPTION OF
                                                        INVESTMENT, INCLUDING
                                                         MATURITY DATE, RATE
                                                         OF INTEREST, PAR OR
IDENTITY OF ISSUE, BORROWER, LESSOR OR SIMILAR PARTY        MATURITY VALUE              COST           CURRENT VALUE
- --------------------------------------------------------------------------------------------------------------------

<S>                                                      <C>                         <C>                <C>        
SSGA Yield-Enhanced Short-Term Investment Fund           25,520,648 units            $25,520,648        $25,520,648
SSGA Intermediate Bond Fund                                  99,380 units              1,012,343          1,018,548
SSGA Daily Bond Market Fund                                  46,733 units                635,812            640,798
American Balanced Fund                                       37,368 units                559,275            543,705
SSGA S&P 500 Index Fund                                     150,487 units             17,055,710         17,971,183
Vanguard Windsor Fund                                       157,689 units              2,684,764          2,616,062
Investment Company of America Fund                           49,175 units              1,193,357          1,191,516
Harbor Capital Appreciation Fund                             55,817 units              1,474,326          1,469,673
Vanguard International Growth Portfolio                      75,427 units              1,231,130          1,241,532
Lockheed Martin Common Stock Fund                           243,424 shares            21,816,876         22,273,296
Martin Marietta Materials Common Stock Fund                  88,462 shares             2,098,128          2,056,742
Participant Loans                                       interest rates ranging         1,240,807          1,240,807
                                                            from 7% to 10%
Cash and Cash Equivalents                                 1,333,889 units              1,333,889          1,333,889
                                                                                     ------------------------------
                                                                                     $77,857,065        $79,118,399
                                                                                     ==============================
</TABLE>


                                                                              14

<PAGE>   18


                         Martin Marietta Materials, Inc.
                     Defined Contribution Plans Master Trust

                  Line 27d-Schedule of Reportable Transactions

    For the Period from October 18, 1996 (inception) through December 31, 1996



<TABLE>
<CAPTION>

                                                                                                CURRENT VALUE        
  IDENTITY OF PARTY      DESCRIPTION OF          PURCHASE         SELLING      COST OF           OF ASSET ON       NET GAIN
      INVOLVED               ASSETS               PRICE            PRICE        ASSETS         TRANSACTION DATE     (LOSS)
- ----------------------------------------------------------------------------------------------------------------------------

Category (i) - Individual transactions in excess of 5 percent of plan assets:

<S>                     <C>                    <C>                 <C>        <C>               <C>                <C>
   State Street Bank    Yield-Enhanced
   and Trust Company     Short-Term
                         Investment Fund,
                         25,411,891 units      $ 25,441,891        $    -     $ 25,441,891      $   25,441,891     $   -

                        S&P 500 Flagship
                         Fund, 154,637 units
                                                 17,510,517             -       17,510,517          17,510,517         -
</TABLE>


Current value of Plan assets is based on the end of year balance of net assets
available for benefits.


                                                                              15

<PAGE>   19


                         Martin Marietta Materials, Inc.
                     Defined Contribution Plans Master Trust

            Line 27d-Schedule of Reportable Transactions (continued)

   For the Period from October 18, 1996 (inception) through December 31, 1996


<TABLE>
<CAPTION>

                                                                                                CURRENT VALUE        
  IDENTITY OF PARTY      DESCRIPTION OF          PURCHASE         SELLING      COST OF           OF ASSET ON       NET GAIN
      INVOLVED               ASSETS               PRICE            PRICE        ASSETS         TRANSACTION DATE     (LOSS)
- ----------------------------------------------------------------------------------------------------------------------------

Category (iii) - Series of transactions in excess of 5 percent of plan assets:

<S>                     <C>                    <C>                 <C>        <C>               <C>                <C>
   State Street Bank    Yield-Enhanced
   and Trust Company     Short-Term
                         Investment Fund       $26,688,821         $   -      $ 26,688,821      $   26,688,821     $   -

                        S&P 500 Flagship Fund 
                                                17,845,293             -        17,845,293          17,845,293         -
</TABLE>



Current value of Plan assets is based on the end of year balance of net assets
available for benefits.

There were no category (ii) or (iv) reportable transactions during the period
ended December 31, 1996.


                                                                            16
<PAGE>   20



                                   SIGNATURES

         The Plan. Pursuant to the requirements of the Securities Exchange Act
of 1934, the trustee of the below named plan has duly caused this annual report
to be signed on its behalf by the undersigned hereunto duly authorized.


                                         MARTIN MARIETTA MATERIALS, INC.
                                         PERFORMANCE SHARING PLAN


                                         By:  Martin Marietta Materials, Inc.
                                              Plan Administrator

                                         By:  Benefit Plan Committee


                                              By:  /s/ Janice K. Henry
                                                   ----------------------------
                                                   Janice K. Henry


Date:  June 27, 1997



<PAGE>   21


                                  EXHIBIT INDEX


            Exhibit No.                   Document
            -----------                   --------
                23                        Consent of Ernst & Young LLP




<PAGE>   1

                                                                     EXHIBIT 23


              CONSENT OF ERNST & YOUNG LLP, INDEPENDENT AUDITORS





We consent to the incorporation by reference in the Registration Statement
(Form S-8 No. 33-83516) pertaining to the Martin Marietta Materials, Inc.
Amended Omnibus Securities Award Plan and in the Registration Statement 
(Form S-3 No. 33-99082) pertaining to the Martin Marietta Materials, Inc. shelf
registration, of our report dated June 9, 1997, with respect to the financial
statements and schedules of the Martin Marietta Materials, Inc. Performance
Sharing Plan and Martin Marietta Materials, Inc. Defined Contribution Plans 
Master Trust included in this Annual Report (Form 11-K) for the transition 
period from October 18, 1996 to December 31, 1996.


                                                          ERNST & YOUNG LLP


June 27, 1997


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