Board Justification

The Company has designed and maintains a comprehensive executive compensation program as a means of: attracting, rewarding and retaining top executive talent in support of the Company’s vision, mission and objectives; maintaining market competitiveness with the Company’s peer group compensation programs and practices; encouraging and rewarding the achievement of specific individual, business segment and corporate goals and objectives; placing a significant portion of total compensation at risk through variable pay components, including upside potential where targeted objectives are exceeded, to promote management action to create added stockholder value; aligning management interests with the interests of the stockholders; and balancing short-term objectives with long-term strategic initiatives.

Board Justification

The Committee then reviewed the EVA bonus multiples of the various business units, segments, and Westlake as a whole, taking into account the cyclical nature of our business and current market conditions, as well as the contributions and performance of the PEO and each of the other NEOs during 2024 and awarded bonus payments under the AIP to the PEO and each of the other NEOs.

Board Justification

The 2024 amounts include the following: Westlake Matching Contributionsto 401(k) Savings Plan andAdditional Contributions of 8% of Annualized Base Pay (up to $345,000in 2024) ($) Term Life Insurance Premiums ($) Cash Dividends on Unvested Restricted Stock, Dividend Equivalents on Unvested Restricted Stock Units and Dividend Equivalents on Vested Performance Stock Units ($)

Board Justification

No stock vested for Jean-Marc Gilson in 2024.