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WESTLAKE CORP

WLK Net buying
CIK 0001262823 #932 in the set updated 17 Sep 2026
Bought (120 mo)
$50.39M
out of their own pocket, the only kind of buying there is
Sold (120 mo)
$128.08M
$0.00 on a plan · $101.18M straight out of an exercise
Sold at will
$26.90M
51 of 154 sales
Net
−$77.69M
+$23.49M against sales at will

By person

30 insiders · 236 transactions
Insider
Role
Bought
Sold
Net
Holding
Of company
Worth
Change
TTWFGP LLC entity
10% owner
$49.98M (37)
—
+$49.98M
47,400,277
37.09%
$3.81B
+3.0%
Chao Albert
Executive Chairman
$258.63K (1)
$49.92M (51) scheduled
−$49.66M
642,880
0.5030%
$51.70M
+140.2%
Bender Mark Steven
EVP & CFO
—
$29.78M (39) scheduled
−$29.78M
35,895
0.0281%
$2.89M
−36.5%
Chao James
Senior Chairman
—
$13.37M (8) scheduled
−$13.37M
49,774
0.0389%
$4.00M
−54.9%
Buesinger Robert F.
EVP, PEM Segment Head
$7.75K (1)
$13.32M (21) scheduled
−$13.32M
34,482
0.0270%
$2.77M
+82,000%
Teel Lawrence E.
EVP and Special Advisor to CEO
—
$5.15M (5) scheduled
−$5.15M
4,903
0.0038%
$394.30K
+463.6%
Kenner Andrew
SVP, Operations
—
$3.86M (3) scheduled
−$3.86M
20,362
0.0159%
$1.64M
+85.5%
Mangieri George J
VP & Chief Accounting Officer
—
$2.82M (7) scheduled
−$2.82M
4,671
0.0037%
$375.64K
−74.3%
Ederington L. Benjamin
EVP, Legal & External Affairs
—
$2.53M (3) scheduled
−$2.53M
80,158
0.0627%
$6.45M
—
Kearns Roger L.
EVP and COO
$149.45K (1)
$2.44M (3) scheduled
−$2.30M
45,785
0.0358%
$3.68M
—
LUKENS MAX L
Director
—
$1.95M (2)
−$1.95M
9,122
0.0071%
$733.59K
−51.7%
Mattina Michael J.
Sr. VP, Polyethylene
—
$982.78K (1) scheduled
−$982.78K
6,506
0.0051%
$523.21K
+7.3%
BLAKELY ROBERT T
Director
—
$851.41K (2)
−$851.41K
10,989
0.0086%
$883.74K
−22.1%
Chao David Tsung-Hung
Director
—
$584.39K (3)
−$584.39K
30,503
0.0239%
$2.45M
+4,571%
Zoeller Johnathan Stevan
VP and CAO
—
$256.55K (3) scheduled
−$256.55K
4,416
0.0035%
$355.13K
—
RILEY H JOHN JR
Director
—
$232.62K (1)
−$232.62K
22,652
0.0177%
$1.82M
+9.5%
Jenkins Dorothy C
Director
—
$30.38K (2) scheduled
−$30.38K
73,778
0.0577%
$5.93M
+87.9%
Chao Catherine T.
Director
—
—
—
27,171
0.0213%
$2.19M
+1,259%
NORTHCUTT R BRUCE
Director
—
—
—
23,351
0.0183%
$1.88M
+658.9%
Graff Michael J
Director
—
—
—
23,310
0.0182%
$1.87M
+657.6%
Janssens Thomas J.
SVP, Ops - PEM & Corp Logistic
—
—
—
17,127
0.0134%
$1.38M
+195.6%
Sheets Jeffrey Wayne
Director
—
—
—
14,927
0.0117%
$1.20M
—
Lubel Kimberly S
Director
—
—
—
13,821
0.0108%
$1.11M
—
Szwejbka Scott Thomas
SVP, HIP Segment Head
—
—
—
13,773
0.0108%
$1.11M
+136.7%
MCCOLLUM MARK A
Director
—
—
—
11,824
0.0093%
$950.89K
—
Haas Marius
Director
—
—
—
11,631
0.0091%
$935.37K
—
Chao John Tsung-chen
Director
—
—
—
7,888
0.0062%
$634.35K
—
Sabat Carolyn Chao
Director
—
—
—
5,748
0.0045%
$462.25K
—
Holy Jeffrey Adam
VP and CAO
—
—
—
5,124
0.0040%
$412.07K
+70.8%
CREGG ROGER A
Director
—
—
—
3,507
0.0027%
$282.03K
—

Individual transactions

40
Insider
Date
Role
Action
Shares
Price
Amount
Buesinger Robert F.
22 Apr 2025
EVP, PEM Segment Head
Buy indirect
83
$93.39
$7.75K
Chao Albert
11 Aug 2021
President & CEO
Buy
3,000
$86.21
$258.63K
TTWFGP LLC
27 Mar 2020
10% owner
Buy indirect
11,287
$40.31
$454.98K
TTWFGP LLC
27 Mar 2020
10% owner
Buy indirect
89,443
$39.49
$3.53M
TTWFGP LLC
27 Mar 2020
10% owner
Buy indirect
42,295
$38.49
$1.63M
TTWFGP LLC
27 Mar 2020
10% owner
Buy indirect
16,975
$37.58
$637.92K
TTWFGP LLC
26 Mar 2020
10% owner
Buy indirect
8,800
$41.99
$369.51K
TTWFGP LLC
26 Mar 2020
10% owner
Buy indirect
94,001
$41.15
$3.87M
TTWFGP LLC
26 Mar 2020
10% owner
Buy indirect
42,199
$40.47
$1.71M
TTWFGP LLC
25 Mar 2020
10% owner
Buy indirect
24,064
$42.69
$1.03M
TTWFGP LLC
25 Mar 2020
10% owner
Buy indirect
33,358
$42.02
$1.40M
TTWFGP LLC
25 Mar 2020
10% owner
Buy indirect
14,025
$40.96
$574.46K
TTWFGP LLC
25 Mar 2020
10% owner
Buy indirect
27,671
$39.83
$1.10M
TTWFGP LLC
25 Mar 2020
10% owner
Buy indirect
24,231
$38.87
$941.86K
TTWFGP LLC
25 Mar 2020
10% owner
Buy indirect
6,651
$37.98
$252.60K
TTWFGP LLC
24 Mar 2020
10% owner
Buy indirect
15,031
$37.60
$565.17K
TTWFGP LLC
24 Mar 2020
10% owner
Buy indirect
67,812
$36.86
$2.50M
TTWFGP LLC
24 Mar 2020
10% owner
Buy indirect
57,419
$36.00
$2.07M
TTWFGP LLC
24 Mar 2020
10% owner
Buy indirect
4,738
$34.94
$165.55K
TTWFGP LLC
19 Mar 2020
10% owner
Buy indirect
21,777
$39.09
$851.26K
TTWFGP LLC
19 Mar 2020
10% owner
Buy indirect
54,388
$38.22
$2.08M
TTWFGP LLC
19 Mar 2020
10% owner
Buy indirect
22,497
$36.20
$814.39K
TTWFGP LLC
19 Mar 2020
10% owner
Buy indirect
3,002
$35.23
$105.76K
TTWFGP LLC
18 Mar 2020
10% owner
Buy indirect
2,300
$33.03
$75.97K
TTWFGP LLC
18 Mar 2020
10% owner
Buy indirect
36,790
$32.13
$1.18M
TTWFGP LLC
18 Mar 2020
10% owner
Buy indirect
99,940
$31.31
$3.13M
TTWFGP LLC
18 Mar 2020
10% owner
Buy indirect
25,970
$30.58
$794.16K
TTWFGP LLC
18 Mar 2020
10% owner
Buy indirect
63,336
$37.32
$2.36M
TTWFGP LLC
17 Mar 2020
10% owner
Buy indirect
100
$35.06
$3.51K
TTWFGP LLC
17 Mar 2020
10% owner
Buy indirect
42,821
$34.46
$1.48M
TTWFGP LLC
17 Mar 2020
10% owner
Buy indirect
69,003
$33.40
$2.30M
TTWFGP LLC
17 Mar 2020
10% owner
Buy indirect
41,076
$32.51
$1.34M
TTWFGP LLC
17 Mar 2020
10% owner
Buy indirect
2,840
$31.63
$89.83K
TTWFGP LLC
17 Mar 2020
10% owner
Buy indirect
9,160
$30.21
$276.72K
Kearns Roger L.
16 Mar 2020
EVP, Vinyls Chemicals
Buy
5,000
$29.89
$149.45K
TTWFGP LLC
16 Mar 2020
10% owner
Buy indirect
12,325
$32.63
$402.16K
TTWFGP LLC
16 Mar 2020
10% owner
Buy indirect
57,203
$31.88
$1.82M
TTWFGP LLC
16 Mar 2020
10% owner
Buy indirect
90,472
$30.97
$2.80M
TTWFGP LLC
13 Mar 2020
10% owner
Buy indirect
46,263
$33.52
$1.55M
TTWFGP LLC
13 Mar 2020
10% owner
Buy indirect
113,737
$32.71
$3.72M
Show all 236 transactions →

What was left out

Form 4 filings counted 527
Amendments (4/A) skipped 24
Filings about a different issuer 1
Unreadable filings 0
Joint filings 0
Sales on a Rule 10b5-1 plan 0
Sales straight out of an exercise 103
Sales at will 51
Transactions with no price 0
Shares from compensation/vesting 4,040,969
Sales filed before the plan box existed 38
History held since 6 Sep 2016