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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: 3/6/26 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
$103.19 $113.51 $56.33 $13,237 128 1,482 2.1% 16.8% 36.81% 74.41%
Exch Sector Industry Sub-Industry
NYSE Manufacturing Chemicals And Allied Products Industrial Organic Chemicals
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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
1y
38
45%
8%
2
BENDER MARK STEVEN
VP,CFO
OS
$1,246,453
12,693
---
2/27/26
---
$98.20
61,842
-17.0
D
---
3/2/26 - 11:35:03 am
2
1y
38
45%
8%
2
BENDER MARK STEVEN
VP,CFO
OS
$1,756,997
17,409
---
2/27/26
$100.91
$101.52
44,433
-28.2
D
---
3/2/26 - 11:35:03 am
3
    
 
BENDER MARK STEVEN
VP,CFO
OE
$969,949
12,693
---
2/27/26
$65.81
$86.54
74,535
20.5
D
---
3/2/26 - 11:35:03 am
4
    
 
PATEL BHAVESH V
DIR
3
---
---
---
2/20/26
---
---
---
---
---
---
2/23/26 - 7:00:02 pm
5
    
 
SZWEJBKA SCOTT THOMAS
VP
JS
$8,563
91
---
2/20/26
---
$94.10
13,773
-0.7
D
R
2/23/26 - 2:45:33 pm
6
    
 
HOLY JEFFREY ADAM
VP,CAO
JS
$7,622
81
---
2/20/26
---
$94.10
5,124
-1.6
D
R
2/23/26 - 2:45:18 pm
7
    
 
EDERINGTON L BENJAMIN
VP,LO
JS
$33,594
357
---
2/20/26
---
$94.10
80,158
-0.4
D
R
2/23/26 - 2:44:36 pm
8
    
 
BUESINGER ROBERT F
VP
JS
$30,677
326
---
2/20/26
---
$94.10
38,482
-0.8
D
R
2/23/26 - 2:43:11 pm
9
    
 
BENDER MARK STEVEN
VP,CFO
JS
$41,874
445
---
2/20/26
---
$94.10
61,842
-0.7
D
R
2/23/26 - 2:42:55 pm
10
    
 
CHAO JOHN TSUNG CHEN
DIR
JS
$8,563
91
---
2/20/26
---
$94.10
7,888
-1.1
D
R
2/23/26 - 2:41:33 pm
11
    
 
CHAO ALBERT
CB,DIR
JS
$235,347
2,501
---
2/20/26
---
$94.10
642,880
-0.4
D
R
2/23/26 - 2:40:20 pm
12
    
 
CHAO JAMES
CB,DIR
JS
$147,644
1,569
---
2/20/26
---
$94.10
49,774
-3.1
D
R
2/23/26 - 2:39:04 pm
13
    
 
SZWEJBKA SCOTT THOMAS
VP
JB
---
365
---
2/19/26
---
---
13,864
2.7
D
R
2/23/26 - 2:45:33 pm
14
    
 
HOLY JEFFREY ADAM
VP,CAO
JB
---
264
---
2/19/26
---
---
5,205
5.3
D
R
2/23/26 - 2:45:18 pm
15
    
 
EDERINGTON L BENJAMIN
VP,LO
JB
---
1,425
---
2/19/26
---
---
80,515
1.8
D
R
2/23/26 - 2:44:36 pm
16
    
 
BUESINGER ROBERT F
VP
JB
---
1,301
---
2/19/26
---
---
38,808
3.5
D
R
2/23/26 - 2:43:11 pm
17
    
 
BENDER MARK STEVEN
VP,CFO
JB
---
1,777
---
2/19/26
---
---
62,287
2.9
D
R
2/23/26 - 2:42:55 pm
18
    
 
CHAO JOHN TSUNG CHEN
DIR
JB
---
213
---
2/19/26
---
---
7,979
2.7
D
R
2/23/26 - 2:41:33 pm
19
    
 
CHAO ALBERT
CB,DIR
JB
---
6,193
---
2/19/26
---
---
645,381
1.0
D
R
2/23/26 - 2:40:20 pm
20
    
 
CHAO JAMES
CB,DIR
JB
---
3,884
---
2/19/26
---
---
51,343
8.2
D
R
2/23/26 - 2:39:04 pm
21
    
 
SZWEJBKA SCOTT THOMAS
VP
JS
$29,190
295
---
2/18/26
---
$98.95
13,499
-2.1
D
R
2/19/26 - 3:20:14 pm
22
    
 
HOLY JEFFREY ADAM
VP,CAO
JS
$21,076
213
---
2/18/26
---
$98.95
4,941
-4.1
D
R
2/19/26 - 3:20:00 pm
23
    
 
EDERINGTON L BENJAMIN
VP,LO
JS
$96,773
978
---
2/18/26
---
$98.95
79,090
-1.2
D
R
2/19/26 - 3:19:48 pm
24
    
 
CHAO JAMES
CB,DIR
JS
$263,603
2,664
---
2/18/26
---
$98.95
47,459
-5.3
D
R
2/19/26 - 3:19:34 pm
25
    
 
CHAO JOHN TSUNG CHEN
DIR
JS
$23,946
242
---
2/18/26
---
$98.95
7,766
-3.0
D
R
2/19/26 - 3:19:23 pm
26
    
 
CHAO ALBERT
CB,DIR
JS
$503,557
5,089
---
2/18/26
---
$98.95
639,188
-0.8
D
R
2/19/26 - 3:19:13 pm
27
    
 
BUESINGER ROBERT F
VP
JS
$89,352
903
---
2/18/26
---
$98.95
37,507
-2.4
D
R
2/19/26 - 3:18:55 pm
28
    
 
BENDER MARK STEVEN
VP,CFO
JS
$119,631
1,209
---
2/18/26
---
$98.95
60,510
-2.0
D
R
2/19/26 - 3:18:42 pm
29
    
 
SZWEJBKA SCOTT THOMAS
VP
JB
---
977
---
2/17/26
---
---
13,794
7.6
D
R
2/19/26 - 3:20:14 pm
30
    
 
HOLY JEFFREY ADAM
VP,CAO
JB
---
706
---
2/17/26
---
---
5,154
15.9
D
R
2/19/26 - 3:20:00 pm
31
    
 
EDERINGTON L BENJAMIN
VP,LO
JB
---
3,809
---
2/17/26
---
---
80,068
5.0
D
R
2/19/26 - 3:19:48 pm
32
    
 
CHAO JAMES
CB,DIR
JB
---
10,382
---
2/17/26
---
---
50,123
26.1
D
R
2/19/26 - 3:19:34 pm
33
    
 
CHAO JOHN TSUNG CHEN
DIR
JB
---
570
---
2/17/26
---
---
7,608
8.1
D
R
2/19/26 - 3:19:23 pm
34
    
 
CHAO ALBERT
CB,DIR
JB
---
16,555
---
2/17/26
---
---
644,277
2.6
D
R
2/19/26 - 3:19:13 pm
35
    
 
BUESINGER ROBERT F
VP
JB
---
3,478
---
2/17/26
---
---
38,410
10.0
D
R
2/19/26 - 3:18:55 pm
36
    
 
BENDER MARK STEVEN
VP,CFO
JB
---
4,751
---
2/17/26
---
---
61,719
8.3
D
R
2/19/26 - 3:18:42 pm
37
1y
14
43%
8%
2
CHAO ALBERT
CB,DIR
OS
$3,004,373
40,836
---
12/22/25
$72.82
$74.44
627,722
-6.1
D
---
12/23/25 - 9:37:13 am
38
    
 
CHAO ALBERT
CB,DIR
OE
$3,627,915
81,673
---
12/22/25
---
$44.42
668,558
13.9
D
---
12/23/25 - 9:37:13 am
39
    
 
CREGG ROGER A
DIR
JB
---
1,339
---
12/10/25
---
---
1,339
New
D
R
12/10/25 - 2:47:38 pm
40
    
 
SZWEJBKA SCOTT THOMAS
VP
JS
$294,681
3,842
---
10/2/25
---
$76.70
12,817
-23.1
D
R
10/3/25 - 12:20:29 pm
41
    
 
SZWEJBKA SCOTT THOMAS
VP
JB
---
10,840
---
10/1/25
---
---
16,659
186.3
D
R
10/3/25 - 12:20:29 pm
42
    
 
CHAO JAMES
CB,DIR
JS
---
15,140
---
8/28/25
---
---
39,741
-27.6
D
---
8/29/25 - 7:18:21 am
43
    
 
GRAFF MICHAEL J
DIR
JB
---
1,128
---
8/9/25
---
---
21,142
5.6
D
R
8/11/25 - 10:18:24 am
44
    
 
CHAO CATHERINE T
DIR
JB
---
1,128
---
8/9/25
---
---
5,580
25.3
D
R
8/11/25 - 10:18:08 am
45
    
 
CHAO DAVID TSUNG HUNG
DIR
JB
---
1,128
---
8/9/25
---
---
8,912
14.5
D
R
8/11/25 - 10:17:51 am
46
    
 
NORTHCUTT R BRUCE
DIR
JB
---
1,128
---
8/9/25
---
---
21,183
5.6
D
R
8/11/25 - 10:17:13 am
47
    
 
SABAT CAROLYN CHAO
DIR
JB
---
1,128
---
8/9/25
---
---
3,580
46.0
D
R
8/11/25 - 10:16:56 am
48
    
 
MCCOLLUM MARK A
DIR
JB
---
1,128
---
8/9/25
---
---
9,656
13.2
D
R
8/11/25 - 10:16:40 am
49
    
 
LUBEL KIMBERLY S
DIR
JB
---
1,128
---
8/9/25
---
---
11,653
10.7
D
R
8/11/25 - 10:16:23 am
50
    
 
SHEETS JEFFREY WAYNE
DIR
JB
---
1,128
---
8/9/25
---
---
12,759
9.7
D
R
8/11/25 - 10:15:45 am
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