WESTLAKE CHEM CORP

Ticker: WLK CUSIP: 960413102 Class: Common Stock

MSD Partners, L.P.'s Holding History (CIK: 0001514334)

Note: Option positions (PUT/CALL) are excluded.

Q3 2013

Shares 241,129 Value ($000) $25,237 Avg Close $42.90 Range $40.28 - $45.40

Q2 2013

Shares 194,748 Value ($000) $18,776 Avg Close $37.72 Range $32.17 - $41.82

Period	Shares	Value ($000)	Average Close	Price Range
Q3 2013	241,129	$25,237	$42.90	$40.28 - $45.40
Q2 2013	194,748	$18,776	$37.72	$32.17 - $41.82