SEC Filing | Martin Marietta Materials

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------------------------- OMB APPROVAL ------------------------- OMB Number: 3235-0145 Expires: August 31, 1999 Estimated average burden hours per response..14.90 ------------------------ UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 13G (AMENDMENT NO. 1) UNDER THE SECURITIES EXCHANGE ACT OF 1934 Martin Marietta Materials, Inc. - -------------------------------------------------------------------------------- (Name of Issuer) Common Stock - -------------------------------------------------------------------------------- (Title of Class of Securities) 573284-10-6 ----------------- (CUSIP Number) December 31, 1999 - -------------------------------------------------------------------------------- (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Schedule is filed: /X/ Rule 13d-1(b) / / Rule 13d-1(c) / / Rule 13d-1(d) The remainder of this cover page shall be filled out for a reporting person's initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter the disclosures provided in a prior cover page. The information required in the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

CUSIP NO. 573284-10-6 - -------------------------------------------------------------------------------- 1. NAMES OF REPORTING PERSONS. I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY). Trustees of General Electric Pension Trust I.R.S. # 14-6015763 - -------------------------------------------------------------------------------- 2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS) (a) / / (b) /X/ - -------------------------------------------------------------------------------- 3. SEC USE ONLY - -------------------------------------------------------------------------------- 4. CITIZENSHIP OR PLACE OF ORGANIZATION State of New York - -------------------------------------------------------------------------------- NUMBER OF 5. SOLE VOTING POWER SHARES BENE- FICIALLY None OWNED BY ------------------------------------------------------------ EACH 6. SHARED VOTING POWER REPORTING PERSON WITH: 1,325,414 ------------------------------------------------------------ 7. SOLE DISPOSITIVE POWER. None ------------------------------------------------------------ 8. SHARED DISPOSITIVE POWER. 1,325,414 - -------------------------------------------------------------------------------- 9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 1,325,414 - -------------------------------------------------------------------------------- 10. CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) / / - -------------------------------------------------------------------------------- 11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 2.84% (5.24% if aggregated with the shares beneficially owned by the other Reporting Persons (as defined in the Introductory Note)) - -------------------------------------------------------------------------------- 12. TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) EP - -------------------------------------------------------------------------------- Page 2 of 25

CUSIP NO. 573284-10-6 - -------------------------------------------------------------------------------- 1. NAMES OF REPORTING PERSONS. I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY). General Electric Investment Corporation, as Investment Manager of GEPT (as defined below) and as Investment Adviser to certain other entities and accounts I.R.S. #22-2152310 - -------------------------------------------------------------------------------- 2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS) (a) / / (b) /X/ - -------------------------------------------------------------------------------- 3. SEC USE ONLY - -------------------------------------------------------------------------------- 4. CITIZENSHIP OR PLACE OF ORGANIZATION State of Delaware - -------------------------------------------------------------------------------- NUMBER OF 5. SOLE VOTING POWER SHARES BENE- FICIALLY 39,600 OWNED BY ------------------------------------------------------------ EACH 6. SHARED VOTING POWER REPORTING PERSON WITH: 1,325,414 ------------------------------------------------------------ 7. SOLE DISPOSITIVE POWER. 39,600 ------------------------------------------------------------ 8. SHARED DISPOSITIVE POWER. 1,325,414 - -------------------------------------------------------------------------------- 9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 1,325,414 - -------------------------------------------------------------------------------- 10. CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) / / - -------------------------------------------------------------------------------- 11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 2.92% (5.24% if aggregated with the shares beneficially owned by the other Reporting Persons) - -------------------------------------------------------------------------------- 12. TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) IA, CO - -------------------------------------------------------------------------------- Page 3 of 25

CUSIP NO. 573284-10-6 - -------------------------------------------------------------------------------- 1. NAMES OF REPORTING PERSONS. I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY). GE Asset Management Incorporated (formerly, GE Investment Management Incorporated), as Investment Adviser to certain entities and accounts I.R.S. #06-1238874 - -------------------------------------------------------------------------------- 2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP * (a) / / (b) /X/ - -------------------------------------------------------------------------------- 3. SEC USE ONLY - -------------------------------------------------------------------------------- 4. CITIZENSHIP OR PLACE OF ORGANIZATION State of Delaware - -------------------------------------------------------------------------------- NUMBER OF 5. SOLE VOTING POWER SHARES BENE- FICIALLY 983,307 OWNED BY ------------------------------------------------------------ EACH 6. SHARED VOTING POWER REPORTING PERSON WITH: None ------------------------------------------------------------ 7. SOLE DISPOSITIVE POWER. 983,307 ------------------------------------------------------------ 8. SHARED DISPOSITIVE POWER. None - -------------------------------------------------------------------------------- 9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 983,307 - -------------------------------------------------------------------------------- 10. CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES * / / - -------------------------------------------------------------------------------- 11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 2.11% (5.24% if aggregated with the shares beneficially owned by the other Reporting Persons) - -------------------------------------------------------------------------------- 12. TYPE OF REPORTING PERSON * IA, CO - -------------------------------------------------------------------------------- Page 4 of 25

CUSIP NO. 573284-10-6 - -------------------------------------------------------------------------------- 1. NAMES OF REPORTING PERSONS. I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY). General Electric Company I.R.S. #14-0689340 - -------------------------------------------------------------------------------- 2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS) (a) / / (b) /X/ - -------------------------------------------------------------------------------- 3. SEC USE ONLY - -------------------------------------------------------------------------------- 4. CITIZENSHIP OR PLACE OF ORGANIZATION State of New York - -------------------------------------------------------------------------------- NUMBER OF 5. SOLE VOTING POWER SHARES BENE- FICIALLY 0 OWNED BY ------------------------------------------------------------ EACH 6. SHARED VOTING POWER REPORTING PERSON WITH: Disclaimed (see 9 below) ------------------------------------------------------------ 7. SOLE DISPOSITIVE POWER. 0 ------------------------------------------------------------ 8. SHARED DISPOSITIVE POWER. Disclaimed (see 9 below) - -------------------------------------------------------------------------------- 9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON Beneficial ownership of all shares disclaimed by General Electric Company - -------------------------------------------------------------------------------- 10. CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) |X| Disclaimed (see 9 above) - -------------------------------------------------------------------------------- 11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) Not applicable (see 9 above) - -------------------------------------------------------------------------------- 12. TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) CO - -------------------------------------------------------------------------------- Page 5 of 25

CUSIP NO. 573284-10-6 - -------------------------------------------------------------------------------- 1. NAMES OF REPORTING PERSONS. I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY). General Electric Capital Services, Inc. (formerly, General Electric Financial Services, Inc.) I.R.S. #06-1109503 - -------------------------------------------------------------------------------- 2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS) (a) / / (b) /X/ - -------------------------------------------------------------------------------- 3. SEC USE ONLY - -------------------------------------------------------------------------------- 4. CITIZENSHIP OR PLACE OF ORGANIZATION State of Delaware - -------------------------------------------------------------------------------- NUMBER OF 5. SOLE VOTING POWER SHARES BENE- FICIALLY None OWNED BY ------------------------------------------------------------ EACH 6. SHARED VOTING POWER REPORTING PERSON WITH: Disclaimed (see 9 below) ------------------------------------------------------------ 7. SOLE DISPOSITIVE POWER. None ------------------------------------------------------------ 8. SHARED DISPOSITIVE POWER. Disclaimed (see 9 below) - -------------------------------------------------------------------------------- 9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON Beneficial ownership of all shares disclaimed by General Electric Capital Services, Inc. - -------------------------------------------------------------------------------- 10. CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) |X| Disclaimed (see 9 above) - -------------------------------------------------------------------------------- 11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) Not applicable (see 9 above) - -------------------------------------------------------------------------------- 12. TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) CO - -------------------------------------------------------------------------------- Page 6 of 25

CUSIP NO. 573284-10-6 - -------------------------------------------------------------------------------- 1. NAMES OF REPORTING PERSONS. I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY). General Electric Mortgage Insurance Corporation I.R.S. # - -------------------------------------------------------------------------------- 2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS) (a) / / (b) /X/ - -------------------------------------------------------------------------------- 3. SEC USE ONLY - -------------------------------------------------------------------------------- 4. CITIZENSHIP OR PLACE OF ORGANIZATION State of North Carolina - -------------------------------------------------------------------------------- NUMBER OF 5. SOLE VOTING POWER SHARES BENE- FICIALLY 20,000 OWNED BY ------------------------------------------------------------ EACH 6. SHARED VOTING POWER REPORTING PERSON WITH: None ------------------------------------------------------------ 7. SOLE DISPOSITIVE POWER. 20,000 ------------------------------------------------------------ 8. SHARED DISPOSITIVE POWER. None - -------------------------------------------------------------------------------- 9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 20,000 - -------------------------------------------------------------------------------- 10. CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) / / - -------------------------------------------------------------------------------- 11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) .04% (5.24% if aggregated with the shares beneficially owned by the other Reporting Persons) - -------------------------------------------------------------------------------- 12. TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) CO, IC - -------------------------------------------------------------------------------- Page 7 of 25

CUSIP NO. 573284-10-6 - -------------------------------------------------------------------------------- 1. NAMES OF REPORTING PERSONS. I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY). Coregis Insurance Company I.R.S. # - -------------------------------------------------------------------------------- 2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS) (a) / / (b) /X/ - -------------------------------------------------------------------------------- 3. SEC USE ONLY - -------------------------------------------------------------------------------- 4. CITIZENSHIP OR PLACE OF ORGANIZATION State of Indiana - -------------------------------------------------------------------------------- NUMBER OF 5. SOLE VOTING POWER SHARES BENE- FICIALLY 8,436 OWNED BY ------------------------------------------------------------ EACH 6. SHARED VOTING POWER REPORTING PERSON WITH: None ------------------------------------------------------------ 7. SOLE DISPOSITIVE POWER. 8,436 ------------------------------------------------------------ 8. SHARED DISPOSITIVE POWER. None - -------------------------------------------------------------------------------- 9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 8,436 - -------------------------------------------------------------------------------- 10. CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) / / - -------------------------------------------------------------------------------- 11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) .01% (5.24% if aggregated with the shares beneficially owned by the other Reporting Persons) - -------------------------------------------------------------------------------- 12. TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) IC, CO - -------------------------------------------------------------------------------- Page 8 of 25

CUSIP NO. 573284-10-6 - -------------------------------------------------------------------------------- 1. NAMES OF REPORTING PERSONS. I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY). Employers Reinsurance Corporation I.R.S. # - -------------------------------------------------------------------------------- 2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS) (a) / / (b) /X/ - -------------------------------------------------------------------------------- 3. SEC USE ONLY - -------------------------------------------------------------------------------- 4. CITIZENSHIP OR PLACE OF ORGANIZATION State of Missouri - -------------------------------------------------------------------------------- NUMBER OF 5. SOLE VOTING POWER SHARES BENE- FICIALLY 109,742 OWNED BY ------------------------------------------------------------ EACH 6. SHARED VOTING POWER REPORTING PERSON WITH: None ------------------------------------------------------------ 7. SOLE DISPOSITIVE POWER. 109,742 ------------------------------------------------------------ 8. SHARED DISPOSITIVE POWER. None - -------------------------------------------------------------------------------- 9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 109,742 - -------------------------------------------------------------------------------- 10. CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) / / - -------------------------------------------------------------------------------- 11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) .23% (5.24% if aggregated with the shares beneficially owned by the other Reporting Persons) - -------------------------------------------------------------------------------- 12. TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) CO, IC - -------------------------------------------------------------------------------- Page 9 of 25

INTRODUCTORY NOTE: This Amendment No. 1 amends the Statement on Schedule 13G filed on behalf of General Electric Company, a New York corporation ("GE"), General Electric Investment Corporation, a Delaware corporation and a wholly owned subsidiary of GE ("GEIC"), GE Asset Management Incorporated (formerly, GE Investment Management Incorporated), a Delaware corporation and a wholly owned subsidiary of GE ("GEAM") and the Trustees of General Electric Pension Trust, a New York common law trust ("GEPT") on February 14, 2000 (as amended, the "Schedule 13G"). This Amendment No. 1 is filed on behalf of GE, GEIC, GEAM, GEPT, General Electric Capital Services, Inc., a Delaware corporation and a wholly owned subsidiary of GE ("GECS"), General Electric Mortgage Insurance Corporation, a North Carolina corporation and an indirect wholly owned subsidiary of GECS ("GEMI"), Employers Reinsurance Corporation, a Missouri corporation and an indirect wholly owned subsidiary of GECS ("ERIC") and Coregis Insurance Company, an Indiana corporation and an indirect wholly owned subsidiary of GECS ("Coregis") (collectively, the "Reporting Persons"). GEIC is a registered investment adviser and acts as the Investment Manager of GEPT, and as an Investment Adviser to certain other entities and accounts, and may be deemed to be the beneficial owner of 1,325,414 shares of Common Stock of Martin Marietta Materials, Inc. (the "Issuer") owned by GEPT and of 39,600 shares of Common Stock of the Issuer owned by such other entities and accounts. GEAM is a registered investment adviser and acts as an Investment Adviser to certain entities and accounts, and may be deemed to be the beneficial owner of 983,307 shares of Common Stock of the Issuer owned by such entities or accounts. GEAM, GEPT, GEIC, GECS, GEMI, ERIC and Coregis each expressly disclaim that they are members of a "group". GECS disclaims beneficial ownership of all shares held by GEMI, ERIC and Coregis. GE disclaims beneficial ownership of all shares and expressly disclaims that it is a member of a "group". ITEM 1(a) NAME OF ISSUER Martin Marietta Materials, Inc. ITEM 1(b) ADDRESS OF ISSUER'S PRINCIPAL EXECUTIVE OFFICE 2710 Wycliff Road, Raleigh, North Carolina 27607 ITEM 2(a) NAME OF PERSON FILING Trustees of General Electric Pension Trust (See Schedule II) General Electric Investment Corporation, as Investment Manager of GEPT and as Investment Adviser to certain other entities and accounts. GE Asset Management Incorporated, as Investment Adviser to certain entities and accounts. General Electric Company General Electric Capital Services, Inc. General Electric Mortgage Insurance Corporation Page 10 of 25

Coregis Insurance Company Employers Reinsurance Corporation ITEM 2(b) ADDRESS OF PRINCIPAL BUSINESS OFFICE OR, IF NONE, RESIDENCE The address of the principal offices of GEPT, GEIC, GECS and GEAM is 3003 Summer Street, Stamford, Connecticut 06905. The address of the principal offices of General Electric Company is 3135 Easton Turnpike, Fairfield, Connecticut 06431. The address of the principal offices of ERIC is 5200 Metcalfe, Overland Park, Kansas 66205. The address of the principal offices of GEMI is 6601 Six Forks Road, Raleigh, North Carolina 27615. The address of the principal offices of Coregis is 181 West Madison, Chicago, Illinois 60602. ITEM 2(c) CITIZENSHIP General Electric Pension Trust - New York common law trust General Electric Investment Corporation - Delaware corporation GE Asset Management Incorporated - Delaware corporation General Electric Company - New York corporation General Electric Capital Services, Inc. - Delaware corporation General Electric Mortgage Insurance Corporation - North Carolina corporation Coregis Insurance Company - Indiana corporation Employers Reinsurance Corporation - Missouri corporation ITEM 2(d) TITLE OF CLASS OF SECURITIES Common Stock ITEM 2(e) CUSIP NUMBER 573284-10-6 ITEM 3 IF THIS STATEMENT IS FILED PURSUANT TO SECTIONS 240.13d-1(b) OR 240.13-2(b) OR (c), CHECK WHETHER THE PERSON FILING IS A: (a) [ ] Broker or Dealer registered under Section 15 of the Act (15 U.S.C.78o) (b) [ ] Bank as defined in Section 3(a)(6) of the Act (15 U.S.C.78c) (c) [ ] Insurance company as defined in Section 3(a)(19) of the Act (15 U.S.C.78c) (d) [ ] Investment Company registered under Section 8 of the Investment Company Act of 1940 (U.S.C.80a-8) (e) [ ] An Investment Adviser in accordance with Section 240.13-1(b)(1)(ii)(E) Page 11 of 25

(f) [ ] An Employee Benefit Plan or Endowment Fund in accordance with Section 240.13d-1(b)(1)(ii)(F) (g) [ ] A Parent Holding Company or Control Person in accordance with Section 240.13d-1(b)(1)(ii)(G) (h) [ ] A Savings Association as defined in Section 3(b) of the federal Deposit Insurance Act (U.S.C. 1813) (i) [ ] A Church Plan that is excluded from the definition of an investment company under Section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3) (j) [X] Group, in accordance with Section 240.13d-1(b)(1)(ii)(J) ITEM 4 OWNERSHIP GEPT GEIC GEAM GE (a) Amount beneficially owned 1,325,414 1,365,014 983,307 0 (b) Percent of class 2.84% 2.92% 2.11% disclaimed (c) No. of shares to which person has (i) sole power to vote or direct the vote None 39,600 983,307 None (ii) shared power to vote or direct 1,325,414 1,325,414 None disclaimed (iii)sole power to dispose or to direct disposition None 39,600 983,307 None (iv) shared power to dispose or to direct disposition 1,325,414 1,325,414 None disclaimed ITEM 4 OWNERSHIP ERIC GEMI Coregis GECS GE (a) Amount beneficially owned 109,742 20,000 8,436 0 0 (b) Percent of class .23% .04% .01% disclaimed disclaimed (c) No. of shares to which person has Page 12 of 25

ERIC GEMI Coregis GECS GE (i) sole power to vote or direct the vote 109,742 20,000 8,436 None None (ii) shared power to vote or direct None None None disclaimed disclaimed (iii) sole power to dispose or to direct disposition 109,742 20,000 8,436 None None (iv) shared power to dispose or to direct disposition None None None disclaimed disclaimed ITEM 5 OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than five percent of the class of securities, check the following: [ ] ITEM 6 OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON Not applicable ITEM 7 IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY WHICH ACQUIRED THE SECURITY BEING REPORTED ON BY THE PARENT HOLDING COMPANY Not applicable ITEM 8 IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF THE GROUP Not applicable ITEM 9 NOTICE OF DISSOLUTION OF GROUP Not applicable ITEM 10 CERTIFICATION By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect. Page 13 of 25

SIGNATURE After reasonable 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: March 30, 2000 GENERAL ELECTRIC PENSION TRUST By: General Electric Investment Corporation, its Investment Manager By: /s/ Michael M. Pastore ------------------------------------- Name: Michael M. Pastore Title: Vice President Page 14 of 25

SIGNATURE After reasonable 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: March 30, 2000 GENERAL ELECTRIC INVESTMENT CORPORATION By: /s/ Michael M. Pastore ------------------------------------- Name: Michael M. Pastore Title: Vice President Page 15 of 25

SIGNATURE After reasonable 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: March 30, 2000 GE ASSET MANAGEMENT INCORPORATED By: /s/ Michael M. Pastore ------------------------------------- Name: Michael M. Pastore Title: Vice President Page 16 of 25

SIGNATURE After reasonable 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: April 17, 2000 GENERAL ELECTRIC COMPANY By: /s/ John H. Myers ------------------------------------- Name: John H. Myers Title: Vice President Page 17 of 25

SIGNATURE After reasonable 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: April 30, 2000 GENERAL ELECTRIC CAPITAL SERVICES, INC. By: /s/ Michael M. Pastore ------------------------------------- Name: Michael M. Pastore Title: Attorney-in-Fact Page 18 of 25

POWER OF ATTORNEY The undersigned, General Electric Capital Services, Inc., a Delaware corporation (hereinafter referred to as the "Corporation") does hereby make, constitute and appoint the persons listed below as the Corporation's true and lawful agent and attorney-in-fact (hereinafter referred to as the "Attorney") to act either together or alone in the name and on behalf of the Corporation for and with respect to the matters hereinafter described. Name of Attorney: Michael A. Gaudino Robert O. Oreilly, Sr. Marry K. Stegelmann James Ungari Leon E. Roday J. Gordon Smith Michael E. Pralle Iain MacKay Jonathan K. Sprole Barbara J. Gould Robert L. Lewis Wendy E. Ormond Mark F. Mylon Each attorney shall have the power and authority to do the following: To execute and deliver any Schedule 13D, Schedule 13G or Forms 3, 4 and 5 or any amendments thereto required to be filed with the Securities and Exchange Commission under the Securities Exchange Act of 1934 on behalf of the Corporation with regard to any securities owned by the Corporation, General Electric Capital Corporation or any of their subsidiaries. And, in connection with the foregoing, to execute and deliver all documents, acknowledgements, consents and other agreements and to take such further action as may be necessary or convenient for the Corporation in order to more effectively carry out the intent and purpose of the foregoing. Agreements, commitments, documents, instruments, and other writing executed by the Attorney in accordance with the terms hereof shall be binding upon the Corporation without attestation and without affixation of the seal of the Corporation. The Power of Attorney conferred hereby shall not be delegable by any Attorney. The Attorney shall serve without compensation for acting in the capacity of agent and attorney-in-fact hereunder. Unless revoked by the Corporation, this Power of Attorney shall be governed under the laws of the State of New York and the authority of the Attorney hereunder shall terminate on March 31, 2002. IN WITNESS WHEREOF, the Corporation has caused this Power of Attorney to be executed, attested and its corporate seal to be affixed pursuant to authority granted by the Corporation's board of directors, as of the 22nd day of February, 2000. General Electric Capital Services, Inc. (Corporate Seal) By: /s/ Nancy E. Barton -------------------------------------- Nancy E. Barton, Senior Vice President Attest: /s/ Brian T. MacAnaney - -------------------------------------- Brian T. McAnaney, Assistant Secretary Page 19 of 25

SIGNATURE After reasonable 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: April 17, 2000 EMPLOYERS REINSURANCE CORPORATION By: /s/ Thomas Powers ------------------------------------- Name: Thomas Powers Title: Vice President Page 20 of 25

SIGNATURE After reasonable 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: April 18, 2000 GENERAL ELECTRIC MORTGAGE INSURANCE CORPORATION By: /s/ Jerome T. Upton ------------------------------------- Name: Jerome T. Upton Title: Vice President and Controller Page 21 of 25

SIGNATURE After reasonable 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: April 17, 2000 COREGIS INSURANCE COMPANY By: /s/ Patricia L. Kubera ------------------------------------- Name: Patricia L. Kubera Title: Senior Vice President Page 22 of 25

SCHEDULE I JOINT FILING AGREEMENT This will confirm the agreement by and between all the undersigned that the Schedule 13G on or about this date and any amendments thereto with respect to the beneficial ownership by the undersigned of shares of the Common Stock of Martin Marietta Materials, Inc. is being filed on behalf of each of the undersigned. Dated: March 30, 2000 GENERAL ELECTRIC PENSION TRUST By: General Electric Investment Corporation, its Investment Manager By: /s/ Michael M. Pastore ------------------------------------ Name: Michael M. Pastore Title: Vice President GENERAL ELECTRIC INVESTMENT CORPORATION By: /s/ Michael M. Pastore ------------------------------------ Name: Michael M. Pastore Title: Vice President GE ASSET MANAGEMENT INCORPORATED By: /s/ Michael M. Pastore ------------------------------------ Name: Michael M. Pastore Title: Vice President GENERAL ELECTRIC COMPANY By: /s/ John H. Myers ------------------------------------ Name: John H. Myers Title: Vice President Page 23 of 25

GENERAL ELECTRIC CAPITAL SERVICES, INC. By: /s/ Michael E. Pralle ------------------------------------ Name: Michael E. Pralle Title: Attorney-in-Fact EMPLOYERS REINSURANCE CORPORATION By: /s/ Thomas Powers ------------------------------------ Name: Thomas Powers Title: Vice President GENERAL ELECTRIC MORTGAGE INSURANCE CORPORATION By: /s/ Jerome T. Upton ------------------------------------ Name: Jerome T. Upton Title: Vice President and Controller COREGIS INSURANCE COMPANY By: /s/ Patricia L. Kubera ------------------------------------ Name: Patricia L. Kubera Title: Senior Vice President Page 24 of 25

SCHEDULE II TRUSTEES OF GENERAL ELECTRIC PENSION TRUST 3003 Summer Street, P.O. Box 7900 Stamford, Connecticut 06905 The names of the Trustees of General Electric Pension Trust are as follows: Eugene K. Bolton Michael J. Cosgrove Ralph R. Layman Alan M. Lewis Robert A. MacDougall John H. Myers Donald W. Torey John J. Walker Page 25 of 25