Mark Steven Bender, EVP & CFO at Westlake Chemical, holds 40.36K shares in Westlake Chemical (Ticker: WLK), holds 14.00K shares in Westlake Chemical PRN (Ticker: WLKP). Most recently, Mark Steven Bender Sold ― shares of Westlake Chemical on May 06, 2024 for an estimated value of 753.34K.