Page 10 - Martin Marietta - 2021 Proxy Statement

/ PROXY

Practices Contributing to Board Effectiveness
• Identification of diverse Board candidates
• Meaningful refreshment

• Rotation of Board committee assignments based on experience and expertise
• Robust onboarding
• Tenure and overboarding guidelines
• Our Board refreshment has resulted in a decrease of the Board’s average tenure, with a greater mix of Directors with
long-term knowledge of the Company, its strategy, opportunities and challenges, and those with new perspectives

Director Nominees
INDEPENDENCE GENDER CEO EXPERIENCE DIVERSITY

91% 27% 45% 45%

BOARD MEMBERS ARE BOARD MEMBERS CURRENT OR FORMER BOARD MEMBERS ARE PROXY HIGHLIGHTS
INDEPENDENT ARE WOMEN PUBLIC COMPANY CEO WOMEN OR MINORITIES

6.8 63.9
TENURE AGE
YEARS AVERAGE
AVERAGE YEARS OF
4 AGE
3 1 3 3

2 2 2 2

0
INDEPENDENT
1 2 - 6 7 - 10 11 - 14 15 49 - 60 61 - 65 66 - 70 >70

Board Attendance

In 2020, during their terms of service, all directors attended 100% of the Board meetings and all directors attended at
least 75% of the committee meetings to which they were assigned. All directors then in office participated by
telephone conference call the May 2020 Annual Meeting.

MARTIN MARIETTA 5