Mary K. Rhinehart

Non-management Director

Appointed to the Board: October 2018

Nationality: United States

Committee Membership:

• Nomination & Corporate Governance Committee
• Compensation Committee
• Safety, Environment & Social Responsibility Committee (Chairman)

Skills and Experience:

Mary is Non‐management Chairman of Johns Manville Corporation, which is a leading global manufacturer of premium-quality building products and engineered specialty materials, and Lubrizol Corporation, which is a global specialty chemicals company. Over nearly 40 years with Johns Manville she held a wide range of global leadership roles, encompassing responsibility for business management and strategic business development and was also Chief Financial Officer. She was formerly a Non‐management Director of Ply Gem Holdings Inc., a leader in exterior building products in North America and Lead Director of CoBiz Financial Inc.

Education:

Bachelor’s degree in Finance from the University of Colorado; MBA from the University of Denver.

External Appointments:

• Current Non-Public Directorships: Non-Executive Chairman of Johns Manville Corporation and Lubrizol Corporation, both Berkshire Hathaway companies.
• Former Public Directorships in the Last 5 Years: Graphic Packaging Holding Company.