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| [X] | ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 |
|-----|--------------------------------------------------------------------------------------|

| [    ] | TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 |
|------------------|------------------------------------------------------------------------------------------|

| **North Carolina**(State or other jurisdiction ofincorporation or organization)    | **56-1848578**(I.R.S. EmployerIdentification No.) |
|------------------------------------------------------------------------------------|---------------------------------------------------|
|                                                                               |                                              |
| 2710 Wycliff Road, Raleigh, North Carolina(Address of principal executive offices) | 27607-3033(Zip Code)                              |
| (919) 781-4550(Registrant’s telephone number, including area code) |
|--------------------------------------------------------------------------|
| Title of each class**Common Stock (par value $.01 per share)** | Name of each exchange on which registered**New York Stock Exchange** |
|----------------------------------------------------------------|----------------------------------------------------------------------|

| Large accelerated filer  [X]           | Accelerated filer  [   ]   |
|---------------------------------------------|-------------------------------------------|
| Non-accelerated filer  [   ] | Smaller reporting company  [  ] |
| Emerging growth company  [  ]     |                                      |

| Class                                  |   | Outstanding at February 15, 2019 |
|----------------------------------------|--------|----------------------------------|
| Common Stock, $.01 par value per share |   | 62,430,548 shares           |
| Excerpts from Annual Report to Shareholders for the Fiscal Year Ended December 31, 2018 (Annual Report) | Parts I, II, and IV |
|---------------------------------------------------------------------------------------------------------|---------------------|
| Proxy Statement for the Annual Meeting of Shareholders to be held May 9, 2019 (Proxy Statement)    | Part III            |

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| ITEM 15. | EXHIBITS AND FINANCIAL STATEMENT SCHEDULES |
|----------|--------------------------------------------|
| Exhibit No. |   | Description                                                                                                                                                                                       |
|-------------|--------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
|        |   |                                                                                                                                                                                              |
| 23.01       |   | Consent of PricewaterhouseCoopers LLP, Independent Registered Public Accounting Firm for Martin Marietta Materials, Inc. and consolidated subsidiaries                                            |
|        |   |                                                                                                                                                                                              |
| 31.01       |   | Certification dated March 18, 2019 of Chief Executive Officer pursuant to Securities and Exchange Act of 1934, rule 13a-14, as adopted pursuant to Section 302 of the Sarbanes- Oxley Act of 2002 |
|        |   |                                                                                                                                                                                              |
| 31.02       |   | Certification dated March 18, 2019 of Chief Financial Officer pursuant to Securities and Exchange Act of 1934, rule 13a-14, as adopted pursuant to Section 302 of the Sarbanes- Oxley Act of 2002 |
|        |   |                                                                                                                                                                                              |

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|                 | MARTIN MARIETTA MATERIALS, INC. |                    |
|----------------------|--------------------------------------|-------------------------|
|                 |                                 |                    |   |
| Date: March 18, 2019 | By:                                  | /s/ Roselyn R. Bar |   |
|                 |                                 | Name:              | Roselyn R. Bar |   |
|                 |                                 | Title:                  | Executive Vice President, General Counsel and Corporate Secretary |   |
|                 |                                 |                    |   |