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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 CORP: WLK
Price: 3/28/25 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
$99.12 $162.64 $98.51 $12,710 128 699 2.1% 6.1% 28.00% 73.70%
Exch Sector Industry Sub-Industry
NYSE Manufacturing Chemicals And Allied Products Industrial Organic Chemicals
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#
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Insider Statistics
T N H M S
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
    
 
CHAO JOHN TSUNG CHEN
DIR
JS
$42,470
391
---
3/5/25
---
$108.62
7,038
-5.3
D
A
3/7/25 - 7:00:04 am
2
    
 
CHAO JOHN TSUNG CHEN
DIR
JS
$25,526
235
---
3/5/25
---
$108.62
7,429
-3.1
D
A,R
3/6/25 - 9:05:48 am
3
    
 
HOLY JEFFREY ADAM
VP,CAO
JS
$37,694
341
---
2/21/25
---
$110.54
4,448
-7.1
D
R
2/24/25 - 2:14:28 pm
4
    
 
EDERINGTON L BENJAMIN
VP,GC,CAO
JS
$323,219
2,924
---
2/21/25
---
$110.54
76,259
-3.7
D
R
2/24/25 - 2:14:10 pm
5
    
 
JANSSENS THOMAS J
VP,OO
JS
$66,987
606
---
2/21/25
---
$110.54
17,127
-3.4
D
R
2/24/25 - 2:13:57 pm
6
    
 
CHAO JAMES
CB,DIR
JS
$724,479
6,554
---
2/21/25
---
$110.54
54,881
-10.7
D
R
2/24/25 - 2:11:26 pm
7
    
 
CHAO ALBERT
CB,DIR
JS
$1,480,131
13,390
---
2/21/25
---
$110.54
586,885
-2.2
D
R
2/24/25 - 2:10:55 pm
8
    
 
BUESINGER ROBERT F
VP,TO
JS
$302,659
2,738
---
2/21/25
---
$110.54
34,932
-7.3
D
R
2/24/25 - 2:10:41 pm
9
    
 
BENDER MARK STEVEN
VP,CFO
JS
$390,206
3,530
---
2/21/25
---
$110.54
56,968
-5.8
D
R
2/24/25 - 2:10:23 pm
10
    
 
CHAO JOHN TSUNG CHEN
DIR
JB
---
955
---
2/20/25
---
---
7,664
14.2
D
A
3/7/25 - 7:00:04 am
11
    
 
CHAO JOHN TSUNG CHEN
DIR
JB
---
955
---
2/20/25
---
---
7,664
14.2
D
R
2/24/25 - 2:14:44 pm
12
    
 
HOLY JEFFREY ADAM
VP,CAO
JB
---
1,306
---
2/20/25
---
---
4,789
37.5
D
R
2/24/25 - 2:14:28 pm
13
    
 
EDERINGTON L BENJAMIN
VP,GC,CAO
JB
---
7,305
---
2/20/25
---
---
79,183
10.2
D
R
2/24/25 - 2:14:10 pm
14
    
 
JANSSENS THOMAS J
VP,OO
JB
---
2,444
---
2/20/25
---
---
17,733
16.0
D
R
2/24/25 - 2:13:57 pm
15
    
 
CHAO JAMES
CB,DIR
JB
---
16,375
---
2/20/25
---
---
61,435
36.3
D
R
2/24/25 - 2:11:26 pm
16
    
 
CHAO ALBERT
CB,DIR
JB
---
33,456
---
2/20/25
---
---
600,275
5.9
D
R
2/24/25 - 2:10:55 pm
17
    
 
BUESINGER ROBERT F
VP,TO
JB
---
6,839
---
2/20/25
---
---
37,670
22.2
D
R
2/24/25 - 2:10:41 pm
18
    
 
BENDER MARK STEVEN
VP,CFO
JB
---
8,819
---
2/20/25
---
---
60,498
17.1
D
R
2/24/25 - 2:10:23 pm
19
    
 
EDERINGTON L BENJAMIN
VP,GC,CAO
JS
$587,452
5,268
---
2/19/25
$111.46
$112.76
71,878
-6.8
D
R
2/20/25 - 2:40:06 pm
20
    
 
BUESINGER ROBERT F
VP,TO
JS
$447,725
4,015
---
2/19/25
$111.46
$112.76
30,831
-11.5
D
R
2/20/25 - 2:39:49 pm
21
    
 
BENDER MARK STEVEN
VP,CFO
JS
$495,773
4,446
---
2/19/25
$111.46
$112.76
51,679
-7.9
D
R
2/20/25 - 2:39:35 pm
22
    
 
JANSSENS THOMAS J
VP,OO
JS
$37,466
336
---
2/19/25
$111.46
$112.53
15,289
-2.2
D
R
2/20/25 - 2:38:43 pm
23
    
 
HOLY JEFFREY ADAM
VP,CAO
JS
$24,421
219
---
2/19/25
$111.46
$112.76
3,483
-5.9
D
R
2/20/25 - 2:36:06 pm
24
    
 
CHAO JAMES
CB,DIR
JS
$255,031
2,287
---
2/19/25
$111.46
$112.76
45,060
-4.8
D
R
2/20/25 - 2:34:52 pm
25
    
 
CHAO ALBERT
CB,DIR
JS
$676,767
6,069
---
2/19/25
$111.46
$112.73
566,819
-1.1
D
R
2/20/25 - 2:30:50 pm
26
    
 
CHAO JOHN TSUNG CHEN
DIR
JB
---
513
---
2/18/25
---
---
6,709
8.3
D
A,R
3/6/25 - 9:05:48 am
27
    
 
CHAO JOHN TSUNG CHEN
DIR
JB
---
513
---
2/18/25
---
---
6,709
8.3
D
R
2/20/25 - 2:41:30 pm
28
    
 
EDERINGTON L BENJAMIN
VP,GC,CAO
JB
---
13,174
---
2/18/25
---
---
77,146
20.6
D
R
2/20/25 - 2:40:06 pm
29
    
 
BUESINGER ROBERT F
VP,TO
JB
---
12,923
---
2/18/25
---
---
34,846
58.9
D
R
2/20/25 - 2:39:49 pm
30
    
 
BENDER MARK STEVEN
VP,CFO
JB
---
13,987
---
2/18/25
---
---
56,125
33.2
D
R
2/20/25 - 2:39:35 pm
31
    
 
JANSSENS THOMAS J
VP,OO
JB
---
1,313
---
2/18/25
---
---
15,625
9.2
D
R
2/20/25 - 2:38:43 pm
32
    
 
HOLY JEFFREY ADAM
VP,CAO
JB
---
702
---
2/18/25
---
---
3,702
23.4
D
R
2/20/25 - 2:36:06 pm
33
    
 
CHAO JAMES
CB,DIR
JB
---
8,796
---
2/18/25
---
---
47,347
22.8
D
R
2/20/25 - 2:34:52 pm
34
    
 
CHAO ALBERT
CB,DIR
JB
---
17,972
---
2/18/25
---
---
572,888
3.2
D
R
2/20/25 - 2:30:50 pm
35
    
 
JANSSENS THOMAS J
VP,OO
JS
$91,079
790
---
2/18/25
---
$115.29
14,312
-5.2
D
R
2/19/25 - 9:19:09 am
36
    
 
EDERINGTON L BENJAMIN
VP,GC,CAO
JS
$218,475
1,895
---
2/18/25
---
$115.29
63,972
-2.9
D
R
2/19/25 - 9:18:45 am
37
    
 
JANSSENS THOMAS J
VP,OO
JB
---
3,039
---
2/14/25
---
---
15,102
25.2
D
R
2/19/25 - 9:19:09 am
38
    
 
EDERINGTON L BENJAMIN
VP,GC,CAO
JB
---
7,597
---
2/14/25
---
---
65,867
13.0
D
R
2/19/25 - 9:18:45 am
39
    
 
CREGG ROGER A
DIR
3
---
---
---
12/10/24
---
---
---
---
---
---
12/10/24 - 7:05:08 pm
40
    
 
CHAO DAVID TSUNG HUNG
DIR
S
$225,888
1,750
---
11/29/24
---
$129.08
7,784
-18.4
D
---
12/2/24 - 7:49:03 am
41
    
 
CHAO DAVID TSUNG HUNG
DIR
S
$227,500
1,750
---
11/22/24
---
$130.00
9,534
-15.5
D
---
11/25/24 - 8:21:11 am
42
    
 
CHAO JAMES
CB,DIR
JS
---
6,642
---
8/30/24
---
---
38,551
-14.7
D
---
9/3/24 - 9:39:55 am
43
    
 
JANSSENS THOMAS J
VP,OO
OS
$2,221,930
14,864
---
8/23/24
---
$149.48
12,063
-55.2
D
---
8/26/24 - 9:40:02 am
44
    
 
JANSSENS THOMAS J
VP,OO
OE
$1,122,347
14,864
---
8/23/24
$65.81
$86.54
26,927
123.2
D
---
8/26/24 - 9:40:02 am
45
1y
13
38%
12%
2
CHAO ALBERT
CB,DIR
OS
$6,641,279
45,298
---
8/16/24
$146.61
$147.04
554,916
-7.5
D
---
8/19/24 - 2:50:42 pm
46
    
 
CHAO ALBERT
CB,DIR
OE
$3,084,341
45,298
---
8/16/24
---
$68.09
600,214
8.2
D
---
8/19/24 - 2:50:42 pm
47
    
 
EDERINGTON L BENJAMIN
VP,GC,CAO
JS
$168,129
1,156
---
8/14/24
---
$145.44
58,270
-1.9
D
R
8/15/24 - 11:00:58 am
48
    
 
BENDER MARK STEVEN
VP,CFO
JS
$168,129
1,156
---
8/14/24
---
$145.44
42,138
-2.7
D
R
8/15/24 - 11:00:45 am
49
    
 
BUESINGER ROBERT F
VP,TO
JS
$403,160
2,772
---
8/14/24
---
$145.44
21,923
-11.2
D
R
8/15/24 - 11:00:32 am
50
    
 
EDERINGTON L BENJAMIN
VP,GC,CAO
JB
---
2,938
---
8/13/24
---
---
59,426
5.2
D
R
8/15/24 - 11:00:58 am
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