WESTLAKE CHEM CORP

Ticker: WLK CUSIP: 960413102 Class: Common Stock

MASON STREET ADVISORS, LLC's Holding History (CIK: 0001167711)

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

Q4 2014

Shares 3,780 Value ($000) $231 Avg Close $57.80 Range $45.45 - $73.16

Q3 2014

Shares 3,970 Value ($000) $344 Avg Close $76.69 Range $70.51 - $83.52

Q2 2014

Shares 3,970 Value ($000) $333 Avg Close $63.36 Range $52.18 - $72.01

Q1 2014

Shares 4,020 Value ($000) $266 Avg Close $53.68 Range $48.11 - $58.70

Q4 2013

Shares 2,070 Value ($000) $253 Avg Close $47.34 Range $43.59 - $51.55

Q3 2013

Shares 2,120 Value ($000) $222 Avg Close $42.90 Range $40.28 - $45.40

Q2 2013

Shares 67,377 Value ($000) $6,496 Avg Close $37.72 Range $32.17 - $41.82

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2014	3,780	$231	$57.80	$45.45 - $73.16
Q3 2014	3,970	$344	$76.69	$70.51 - $83.52
Q2 2014	3,970	$333	$63.36	$52.18 - $72.01
Q1 2014	4,020	$266	$53.68	$48.11 - $58.70
Q4 2013	2,070	$253	$47.34	$43.59 - $51.55
Q3 2013	2,120	$222	$42.90	$40.28 - $45.40
Q2 2013	67,377	$6,496	$37.72	$32.17 - $41.82