WESTLAKE CHEM CORP

Ticker: WLK CUSIP: 960413102 Class: Common Stock

Nationwide Fund Advisors's Holding History (CIK: 0001097218)

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

Q1 2017

Shares 1,185 Value ($000) $78 Avg Close $55.38 Range $49.25 - $59.68

Q4 2016

Shares 5,424 Value ($000) $304 Avg Close $47.64 Range $42.61 - $53.78

Q3 2016

Shares 42,130 Value ($000) $2,254 Avg Close $41.92 Range $34.93 - $47.03

Q2 2016

Shares 6,930 Value ($000) $297 Avg Close $39.55 Range $34.26 - $45.64

Q1 2016

Shares 6,930 Value ($000) $321 Avg Close $39.11 Range $34.33 - $46.52

Q4 2014

Shares 88,890 Value ($000) $5,430 Avg Close $57.80 Range $45.45 - $73.16

Q3 2014

Shares 192,425 Value ($000) $16,662 Avg Close $76.69 Range $70.51 - $83.52

Q2 2014

Shares 465,060 Value ($000) $38,953 Avg Close $63.36 Range $52.18 - $72.01

Q1 2014

Shares 533,286 Value ($000) $35,293 Avg Close $53.68 Range $48.11 - $58.70

Q4 2013

Shares 222,048 Value ($000) $27,105 Avg Close $47.34 Range $43.59 - $51.55

Q3 2013

Shares 1,389 Value ($000) $145 Avg Close $42.90 Range $40.28 - $45.40

Q2 2013

Shares 3,000 Value ($000) $289 Avg Close $37.72 Range $32.17 - $41.82

Period	Shares	Value ($000)	Average Close	Price Range
Q1 2017	1,185	$78	$55.38	$49.25 - $59.68
Q4 2016	5,424	$304	$47.64	$42.61 - $53.78
Q3 2016	42,130	$2,254	$41.92	$34.93 - $47.03
Q2 2016	6,930	$297	$39.55	$34.26 - $45.64
Q1 2016	6,930	$321	$39.11	$34.33 - $46.52
Q4 2014	88,890	$5,430	$57.80	$45.45 - $73.16
Q3 2014	192,425	$16,662	$76.69	$70.51 - $83.52
Q2 2014	465,060	$38,953	$63.36	$52.18 - $72.01
Q1 2014	533,286	$35,293	$53.68	$48.11 - $58.70
Q4 2013	222,048	$27,105	$47.34	$43.59 - $51.55
Q3 2013	1,389	$145	$42.90	$40.28 - $45.40
Q2 2013	3,000	$289	$37.72	$32.17 - $41.82