When were Mark A. McCollum's RSUs granted, how many were awarded, and when do they fully vest?

Mark A. McCollum was granted 2,184 Restricted Stock Units (RSUs) on August 14, 2026, and these RSUs are scheduled to fully vest on August 14, 2027. Each RSU converts into one share of Westlake Chemical Corporation’s common stock on a one-for-one basis, and following the grant, McCollum directly holds 2,184 RSUs.

What is the relationship between McCollum's RSUs and Westlake Chemical Corporation's common stock?

The RSUs granted to Mark A. McCollum convert into an equal number of Westlake Chemical Corporation’s common stock shares on a one-for-one basis, meaning each RSU entitles him to one share of common stock upon vesting.