X0306 4 2020-03-12 0 0001604665 Westlake Chemical Partners LP WLKP 0001588279 Ederington L. Benjamin 2801 POST OAK BLVD SUITE 600 HOUSTON TX 77056 1 1 0 0 VP, General Counsel Common Units (Limited Partner Interests) 2020-03-12 4 P 0 1000 16.01 A 11000 D Mr. Ederington is an director and officer of Westlake Chemical Partners GP LLC, the general partner of Westlake Chemical Partners LP. L. Benjamin Ederington by J. Feng POA 2020-03-16