Page 20 - Code of Ethical Business Conduct

18 Martin Marietta

Any violation of these rules must be reported to the Company’s Legal
Department or Ethics Hotline at 800-209-4508.
As with all other provisions in this Code, this provision is not intended,
nor will be interpreted, to interfere with, restrain or prevent employee
communications regarding wages, hours or other terms and conditions
of employment.
It is the Company’s policy to provide full, fair, accurate, timely and
understandable disclosure in all documents required to be filed with, or submitted
to, the Securities and Exchange Commission and all other public communications.
Our employees must act in a manner that supports this policy, including ensuring
that internal reports are accurate and complete, and that they are in compliance
with our systems of internal controls and disclosure controls and procedures.

Computer Use

The computer systems of the Company (including, but not limited
to, desktop and laptop computer equipment; mobile, phone or personal devices;
hard drives; printers; peripherals; software and operating systems; and network
and/or Internet-related accounts providing electronic mail, access to the Internet,
newsgroup access, and/or file-transfer capabilities) are the property of the
Company and are to be used for the business purposes of the Company. Like any
record, the information in any computer-related file is Company property and
should be treated and protected like any other piece of Company property or
Company record.
You should not have an expectation of privacy regarding the use of our
computer systems. Any information you create, share or download onto Company
systems belongs to the Company. We reserve the right to monitor, record, disclose,
audit and delete without prior notice the nature and content of an employee’s
activity using our Company’s email, phone, voicemail, internet and other systems,
to the extent permitted by state or local law.
The computer or communication systems of the Company should not be used to
commit any illegal act or to download, transmit or receive sexually explicit or other
offensive material. In addition, employees are prohibited from providing confidential
information about the Company, its customers, suppliers, directors, employees
or its securities to the public. As with all other provisions in this Code, this
provision is not intended, nor will be interpreted, to interfere with,
restrain or prevent employee communications regarding wages, hours or
other terms and conditions of employment.