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 B  AB  JB*  OB  OE*  OE
 S  AS  JS*  OS  OS*  3
 JB
 JS
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Detailed Insider History for:
WESTLAKE CHEMICAL CORP: WLK
Price: 5/17/12 52-Wk
High		 52-Wk
Low		 Mkt Cap (mm) Shrs Out (mm) 3-Mth Ave
Vol (m)		 Ind. Yield Short Int
% Float		 Inst. Owned Insider Owned
$51.60 $66.92 $31.26 $3,438 67 545 0.6% 6.2% 35.59% 0.59%
Exch Sector Industry Sub-Industry
NYSE Manufacturing Chemicals And Allied Products Industrial Organic Chemicals
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#:
View Form:
Filer Name
Insider Title
Trans Type
Dollar Value
Shares Traded
Trans Date From
Trans Date To
Trans Price From
Trans Price To
Total Holdings
Delta % Owned
Owned
Other Info
Input Date
1
TAYLOR JEFFREY L
VP
OS
$341,164
6,028
---
5/14/12
$56.54
$56.69
20,047
-23.1
D
---
5/16/12 - 4:06:43 pm
2
TAYLOR JEFFREY L
VP
OE
$85,809
6,028
---
5/14/12
---
$14.23
26,075
30.1
D
---
5/16/12 - 4:06:43 pm
3
LUKENS MAX L
DIR
OS
$330,623
5,765
---
5/10/12
---
$57.35
6,588
-46.7
D
---
5/14/12 - 4:04:51 pm
4
LUKENS MAX L
DIR
OE
$54,690
2,324
---
5/10/12
$20.82
$24.51
12,353
23.2
D
---
5/14/12 - 4:04:51 pm
5
BUESINGER ROBERT F
VP
JS
$10,338
170
---
4/9/12
$60.81
$60.82
4,345
-3.8
D
---
4/11/12 - 4:06:17 pm
6
HANSEN DAVID R
VP
JS
$90,736
1,578
---
2/24/12
$57.50
$57.78
25,846
-5.8
D
---
2/28/12 - 4:42:05 pm
7
BENDER MARK STEVEN
VP,CFO,TR
JS
$166,753
2,900
---
2/24/12
$57.50
$57.78
36,281
-7.4
D
---
2/28/12 - 4:41:01 pm
8
WALLACE STEPHEN
VP,GC,SEC
JS
$60,549
1,053
---
2/24/12
$57.50
$57.78
26,112
-3.9
D
---
2/28/12 - 4:39:57 pm
9
TAYLOR JEFFREY L
VP
JS
$60,549
1,053
---
2/24/12
$57.50
$57.78
20,047
-5.0
D
---
2/28/12 - 4:38:19 pm
10
CONDON DONALD MARION JR
VP,BD
JS
$60,549
1,053
---
2/24/12
$57.50
$57.78
21,120
-4.7
D
---
2/28/12 - 4:37:18 pm
11
MANGIERI GEORGE J
VP,CAO
JS
$166,753
2,900
---
2/24/12
$57.50
$57.78
21,723
-11.8
D
---
2/28/12 - 4:36:18 pm
12
BENDER MARK STEVEN
VP,CFO,TR
JB
---
3,274
---
2/17/12
---
---
39,181
9.1
D
A,R
2/23/12 - 12:48:46 pm
13
CHAO JAMES
CB,DIR,BO
JB
---
9,586
---
2/17/12
---
---
90,908
11.8
D
R
2/22/12 - 4:18:09 pm
14
CHAO ALBERT
PR,CEO,DIR,BO
JB
---
11,982
---
2/17/12
---
---
120,875
11.0
D
R
2/22/12 - 4:17:20 pm
15
BUESINGER ROBERT F
VP
JB
---
1,681
---
2/17/12
---
---
4,515
59.3
D
R
2/22/12 - 4:16:11 pm
16
KENNER ANDREW
VP
JB
---
1,778
---
2/17/12
---
---
12,145
17.2
D
R
2/22/12 - 4:15:24 pm
17
CONDON DONALD MARION JR
VP,BD
JB
---
1,895
---
2/17/12
---
---
22,173
9.3
D
R
2/22/12 - 4:14:35 pm
18
HANSEN DAVID R
VP
JB
---
1,884
---
2/17/12
---
---
27,424
7.4
D
R
2/22/12 - 4:13:43 pm
19
MANGIERI GEORGE J
VP,CAO
JB
---
1,152
---
2/17/12
---
---
24,623
4.9
D
R
2/22/12 - 4:12:55 pm
20
TAYLOR JEFFREY L
VP
JB
---
1,816
---
2/17/12
---
---
21,100
9.4
D
R
2/22/12 - 4:12:08 pm
21
WALLACE STEPHEN
VP,GC,SEC
JB
---
1,473
---
2/17/12
---
---
27,165
5.7
D
R
2/22/12 - 4:10:30 pm
22
BENDER MARK STEVEN
VP,CFO,TR
JS
$251,768
4,408
---
2/14/12
$57.08
$58.04
35,907
-10.9
D
---
2/16/12 - 2:57:33 pm
23
TAYLOR JEFFREY L
VP
JS
$111,547
1,953
---
2/14/12
$57.08
$58.03
19,284
-9.2
D
---
2/16/12 - 2:56:41 pm
24
HANSEN DAVID R
VP
JS
$122,169
2,139
---
2/14/12
$57.08
$58.01
25,540
-7.7
D
---
2/16/12 - 2:55:57 pm
25
MANGIERI GEORGE J
VP,CAO
JS
$130,452
2,284
---
2/14/12
$57.08
$58.03
23,471
-8.9
D
---
2/16/12 - 2:55:14 pm
26
WALLACE STEPHEN
VP,GC,SEC
JS
$122,171
2,139
---
2/14/12
$57.08
$58.04
25,692
-7.7
D
---
2/16/12 - 2:54:33 pm
27
KENNER ANDREW
VP
JS
$118,805
2,080
---
2/14/12
$57.08
$58.09
10,367
-16.7
D
---
2/16/12 - 2:53:47 pm
28
CONDON DONALD MARION JR
VP,BD
JS
$102,352
1,792
---
2/14/12
---
$57.08
20,278
-8.1
D
---
2/16/12 - 2:52:59 pm
29
CHAO ALBERT
PR,CEO,DIR,BO
JS
$1,163,891
20,378
---
2/14/12
$57.08
$58.01
108,893
-15.8
D
---
2/16/12 - 2:52:16 pm
30
CHAO JAMES
CB,DIR,BO
JS
$873,076
15,285
---
2/14/12
$57.08
$58.15
81,322
-15.8
D
---
2/16/12 - 2:51:19 pm
31
CHAO JAMES
CB,DIR,BO
OS
$56,597
1,295
---
11/16/11
$43.70
$43.71
96,607
-1.3
D
---
11/17/11 - 5:08:15 pm
32
CHAO JAMES
CB,DIR,BO
OE
$18,434
1,295
---
11/16/11
---
$14.23
97,902
1.3
D
---
11/17/11 - 5:08:15 pm
33
RILEY H JOHN JR
DIR
JB
---
1,804
---
8/19/11
---
---
7,495
31.7
D
R
8/24/11 - 9:01:08 am
34
LUKENS MAX L
DIR
JB
---
1,804
---
8/19/11
---
---
10,029
21.9
D
R
8/24/11 - 9:00:30 am
35
JENKINS DOROTHY C
DIR,BO
JB
---
1,804
---
8/19/11
---
---
15,029
13.6
D
R
8/24/11 - 8:59:44 am
36
BLAKELY ROBERT T
DIR
JB
---
1,804
---
8/19/11
---
---
10,029
21.9
D
R
8/24/11 - 8:58:55 am
37
BARNETT E WILLIAM
DIR
JB
---
1,804
---
8/19/11
---
---
9,248
24.2
D
R
8/24/11 - 8:58:22 am
38
TAYLOR JEFFREY L
VP
B
$37,190
1,000
---
8/8/11
---
$37.19
21,237
4.9
D
---
8/10/11 - 4:07:53 pm
39
BUESINGER ROBERT F
VP
OS
$81,824
1,477
---
5/19/11
---
$55.39
2,604
-36.2
D
---
8/5/11 - 4:05:46 pm
40
BUESINGER ROBERT F
VP
OE
$40,226
1,477
---
5/19/11
---
$27.23
4,081
56.7
D
---
8/5/11 - 4:05:46 pm
41
LUKENS MAX L
DIR
OS
$338,741
5,584
---
5/10/11
---
$60.61
8,225
-40.4
D
---
5/11/11 - 4:23:30 pm
42
LUKENS MAX L
DIR
OE
$141,062
5,584
---
5/10/11
$20.82
$24.51
13,809
67.9
D
---
5/11/11 - 4:23:30 pm
43
MANGIERI GEORGE J
VP,CAO
OB
$144,463
7,489
---
5/9/11
---
$19.29
33,244
29.1
D
---
5/11/11 - 4:24:15 pm
44
MANGIERI GEORGE J
VP,CAO
OS
$448,087
7,435
---
5/6/11
$60.26
$60.36
25,755
-22.4
D
---
5/9/11 - 4:39:08 pm
45
MANGIERI GEORGE J
VP,CAO
OE
$120,348
7,435
---
5/6/11
$14.23
$20.52
33,190
28.9
D
---
5/9/11 - 4:39:08 pm
46
BUESINGER ROBERT F
VP
JS
$9,305
162
---
4/7/11
---
$57.44
2,604
-5.9
D
---
4/8/11 - 4:24:17 pm
47
KENNER ANDREW
VP
OS
$446,101
9,319
---
3/15/11
---
$47.87
12,447
-42.8
D
---
3/16/11 - 4:06:36 pm
48
KENNER ANDREW
VP
OE
$150,847
9,319
---
3/15/11
$14.23
$20.52
21,766
74.9
D
---
3/16/11 - 4:06:36 pm
49
CHAO JAMES
CB,DIR,BO
OS
$2,460,152
49,007
---
3/15/11
---
$50.20
96,607
-33.7
D
---
3/16/11 - 4:04:41 pm
50
CHAO JAMES
CB,DIR,BO
OE
$945,345
49,007
---
3/15/11
---
$19.29
145,614
50.7
D
---
3/16/11 - 4:04:41 pm
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