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

0

Nothing of that kind in this period.

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